小西製作所 List of Products and Services

This is an introduction to "KONISHI VIET NAM Co., Ltd.," the Vietnamese base of Konishi Manufacturing, which handles a large number of OEM bearings. The company utilizes various grinding machines at the same level as those in Japan to carry out precision machining. They have a strong track record of delivering parts primarily for the automotive, home appliance, and electronic equipment sectors, ranging from tools used in major manufacturing factories to mass-produced components incorporated into customers' products. **Features of KONISHI VIET NAM Co., Ltd.:** - More than half of the local operators have trained in Japan and mastered the fundamental techniques, ensuring consistent quality. - Backed by technical expertise in precision machining using various grinding machines, they specialize in parts for automotive, home appliances, and electronic devices, receiving orders for components from various fields. - Leveraging the Vietnamese trait of "dexterity," they excel in assembly of electronic components and other products. Top domestic brand manufacturers utilize them as a supplier of precision parts to achieve local production for local consumption as they expand overseas. *For more details, please download the PDF document or feel free to contact us.*

• Metal bearings
• Other electronic parts

One of the major features of Konishi Manufacturing's "Centerless Through Grinding" is its ability to perform continuous processing (through grinding) even on thin parts. Generally, thin parts require multiple pieces to be bundled together for intermittent processing due to equipment safety, but our company boasts high productivity through continuous processing technology developed in bearing manufacturing, which can provide cost reduction benefits to our customers. Additionally, at our overseas base, "KONISHI VIET NAM Co., Ltd.," we specialize in precision machining using various grinding machines, primarily for parts used in the automotive, home appliance, and electronics industries, and we accept orders for components from various fields. **Features of Konishi Manufacturing's Centerless Grinding for Thin-Walled Ring Shapes:** - Centerless through grinding allows for continuous processing even for thin parts. - Depending on the shape and size of the product, we guarantee quality with an outer diameter dimension tolerance of 2μm. - We have more than 10 centerless grinding machines, including in-feed machines, allowing us to handle a wide range from large lots in the tens of thousands to medium lots of several thousand. - Our quality assurance system is robust. *For more details, please refer to the PDF document or feel free to contact us.*

• Processing Contract
• Surface treatment contract service
• Grinding Machine

Four-point contact bearings are mostly standard products from manufacturers, and it is common practice to select products that fit the usage environment of the company and procure products based on their model numbers. Therefore, it is very difficult to procure products that fall outside the manufacturer's standard offerings, and if there is not a certain minimum order quantity, it is challenging to receive support from major manufacturers, making it difficult to produce bearings. In response, our company handles the design and manufacturing of bearing products needed in quantities ranging from hundreds to thousands per month. We specialize in small-diameter and thin-walled bearings, and for thrust ball bearings that achieve a compact height of about 5mm, please leave it to Konishi Seisakusho, which operates "Precision Grinding Processing.com." 【Features of our design and manufacturing support for four-point contact bearings】 ■ While they offer lower rigidity compared to crossed roller bearings, they provide cost advantages. ■ They contribute to space-saving and improved energy efficiency. ■ There are numerous implementation records with major companies, allowing us to provide high-quality products. *For more details, please refer to the related link page or feel free to contact us.

• Other cutting tools
• others
• Processing Contract

At "Precision Grinding Processing.com," we provide comprehensive support from the design of thrust ball bearings to manufacturing and inspection quality assurance. We have handled OEM manufacturing for major bearing manufacturers and have been involved in mass production of bearings ranging from hundreds of thousands to millions of units. Leveraging our years of experience, we also manufacture custom thrust ball bearings from the design stage, conducting technical consultations to hear customer requests, and providing design proposals and prototype development. If you are looking for "high-quality custom thrust ball bearings at a suitable cost," please contact us. 【Features of Custom Thrust Bearing Design and Manufacturing】 ■ Capable of manufacturing custom small-diameter bearings with a height of 5mm and an outer diameter of φ30mm ■ Quick setup utilizing mass production lines that also handle OEM manufacturing for major bearing manufacturers ■ Quality assurance system with full inspection ■ Support for detailed design from load calculations to conceptual drawings and part drawings ■ Suitable designs tailored to specific applications *For more details, please refer to the related link page or feel free to contact us.

• Other cutting tools
• others
• Processing Contract

Surface grinding is a machining method used for grinding the width of cylindrical and rectangular shaped products. On our website, we introduce the machining technology related to outer diameter grinding held by "Precision Grinding.com," along with examples of machining cases. We can accommodate a wide range of production from medium lot products of several hundred to several thousand units per month, to mass-produced items in the tens of thousands to hundreds of thousands of units per month. If you are facing challenges with high precision requirements for dimensional tolerances in the width direction, flatness, or parallelism, please contact us. [Contents] ■ What is surface grinding? ■ The machining limits achieved by our surface grinding ■ Examples of machining realized through surface grinding ■ Surface grinding ■ Equipment information for surface polishing and surface grinding *For more details, please refer to the related links page or feel free to contact us.

• Other cutting tools
• others
• Processing Contract

Outer diameter grinding refers to the process of applying a grinding wheel to the outer diameter of round-shaped products, such as cylindrical shapes and ring shapes. In particular, it is an essential processing step for products that require high precision in geometric tolerances such as roundness and surface roughness. Our company has a track record of various outer diameter grinding processes for products like shafts and rings, and we have equipped ourselves with various processing machines to accommodate mass production. On our website, we will introduce the grinding technology related to outer diameter grinding held by "Precision Grinding.com," as well as examples of processing. Please take a look. [Contents] ■ What is outer diameter grinding? ■ Processing limits in our outer diameter grinding ■ Outer diameter grinding ■ Information on outer diameter polishing and grinding equipment *For more details, please refer to the related links page or feel free to contact us.

• Other cutting tools
• others
• Processing Contract

Internal diameter grinding processing, also known as internal grinding, refers to the processing of the inside of holes. Our company primarily manufactures bearings under our own brand, MRK, and possesses deep knowledge in grinding and polishing processes. On our website, we introduce the processing limits and actual production examples of internal diameter grinding that "Precision Grinding Processing.com" has been engaged in. Please take a look. [Contents] ■ What is internal diameter grinding (inside-diameter-grinding)? ■ Our processing limits in internal diameter grinding ■ Examples of internal diameter grinding ■ Internal diameter grinding ■ Information on internal diameter grinding equipment *For more details, please refer to the related links page or feel free to contact us.

• Other cutting tools
• others
• Processing Contract

At "Precision Grinding Processing.com," we propose suitable processing methods and design improvements based on your requirements for precision, appearance, and other factors. For machine parts, once the specifications are finalized and products are mass-produced, efforts for cost reduction will involve diligent cost-cutting through inexpensive purchasing and improving on-site productivity. On the other hand, the cost reduction effects that can be realized at the design stage are significantly greater than those achieved through procurement and production activities. Generally, it is said that 70-80% of costs are determined at the design stage. On this site, we actively engage in the design stage of machine parts and provide design proposals that take mass production into account. 【Features】 ■ Proposing suitable processing methods and design improvements based on your requirements for precision, appearance, and other factors ■ Actively engaging in the design stage of machine parts and providing design proposals considering mass production ■ Offering advisory support from the perspective of processing companies regarding machine parts related to polishing and grinding *For more details, please refer to the related links page or feel free to contact us.

• Other cutting tools
• others
• Processing Contract

"Precision Grinding Processing.com" is primarily aimed at achieving high precision finishing for parts that have undergone pressing, forging, or cutting processes. While it is possible to provide parts and only handle polishing and grinding, this site can procure pressed, forged, and machined products in-house. Customers can benefit from reduced labor for parts procurement and lower management costs for suppliers. 【Features】 ■ Comprehensive support from procurement of pressed, forged, and machined parts to polishing and finishing ■ Assurance of traceability and quality guarantee ■ Track record of polishing and grinding processing for pressed, forged, and machined products *For more details, please refer to the related link page or feel free to contact us.

• Other cutting tools
• others
• Processing Contract

Parts for high-precision management in grinding and polishing processes require a highly reliable quality assurance system simultaneously. Konishi Seisakusho, which operates "Seimitsu Gensaku Kōsaku.com," is also a ball bearing manufacturer known by the trademark "MRK." Along with a well-equipped facility, we have established a thorough quality assurance system. We possess the know-how and inspection equipment to ensure the quality of mass-produced bearings, as well as experienced quality control managers, allowing us to provide our customers with safe and reliable products. 【Features】 ■ Reliable and trustworthy quality assurance system ■ An organization that continuously promotes quality improvement ■ Mass-produced parts requiring high-precision management *For more details, please refer to the related link page or feel free to contact us.

• Other cutting tools
• others
• Processing Contract

The processing performed on the parallel plane honing machine owned by "Precision Grinding Processing.com" not only ensures precision such as flatness and parallelism but also serves as a processing machine through method conversion from other processing methods. Therefore, it is capable of achieving a certain level of precision (in the tens of microns) for items with four or more corners, round items, and irregular shapes. The parallel plane honing machine not only achieves high precision with flatness below 1μm but can also be utilized for simultaneous processing of multiple parts. It is particularly effective for managing the parallelism and flatness of the end faces of combined multiple parts with high precision. **Benefits Achieved with Parallel Plane Honing Processing** - By processing the end faces of cylindrical parts through flat grinding instead of using rotary grinding machines or magnetic grinding machines, high precision processing with flatness and parallelism in the range of 0.5μm can be achieved. - Quality control can be maintained within 1μm even for mass-produced items. - It boasts high productivity when high precision is required for the end faces of cylindrical parts, leading to significant cost advantages. *For more details, please refer to the related link page or feel free to contact us.*

• Other cutting tools
• others
• Processing Contract

"Precision Grinding Processing.com" boasts one of the top grinding processing facilities in the country, providing comprehensive in-house support for cylindrical products through surface grinding, outer diameter grinding, and inner diameter grinding, managing precision in the micrometer range for flatness, parallelism, perpendicularity, and coaxiality, making it strong in mass production. It is not widely known, but considering VA (Value Analysis) and VE (Value Engineering) during the design phase of machine parts that require polishing and grinding can lead to significant cost reductions. We contribute to enhancing our customers' product competitiveness by reducing costs for machine parts that require polishing and grinding. 【Features】 ■ Strong in mass production processing of cylindrical parts with polishing and grinding ■ Cost reduction for mass-produced parts involving polishing and grinding ■ VA and VE proposals during the design phase and transition to mass production *For more details, please refer to the related links page or feel free to contact us.

• Other cutting tools
• others
• Processing Contract

Do you have any concerns like these in prototype work? ✔ The specifications differ between the prototype and the mass production machine, making it difficult to start up smoothly... ✔ I want to conduct test production of the work under the same conditions as in mass production... We propose test work production using our mass production machines for design and development personnel who have such concerns. By conducting prototypes on our machining machines and production lines and using those test works to establish conditions, a smooth transition to mass production can be achieved. In the current market situation, the speed of launching mass-produced products is one of the high demands. Additionally, we have strengths in mass production processing, where we handle grinding internally and manage flatness, parallelism, perpendicularity, and coaxiality with high precision in the µm range, so please feel free to consult with us!

• Processing Contract

KONISHI Manufacturing is a bearing manufacturer, and as such, we have a wide range of grinding machines for end face, outer diameter, and inner diameter processing. We offer various equipment lineups with different types even within the same process, allowing us to select processing machines tailored to our customers' needs, considering mass production, workpiece shapes, precision, and more. Our company excels in mass production processing with in-house grinding operations, managing high precision in micrometer units for flatness, parallelism, perpendicularity, and coaxiality. Additionally, since KONISHI Manufacturing can produce major jigs in-house, we are capable of vertical startup up to product processing. We can leverage our mass production track record, equipment, and know-how in bearing manufacturing to provide effective mass management for grinding processing, so please feel free to consult with us. ≪We are currently offering a VE/VA Technology Handbook realized through grinding and machining!≫ This handbook is aimed at engineers involved in the design of grinding and machining processes, providing a quick and easy read for those considering cost reduction for products, wanting to shorten production lead times, or aiming to improve quality for stable operations. Please feel free to download it.

• Grinding Machine
• Processing Jig
• Processing Contract

KONISHI Manufacturing Co., Ltd. possesses equipment for inner and outer diameter grinding and surface grinding used in bearing processing, enabling a mass production system for grinding operations. KONISHI Manufacturing, with its expertise in bearing processing technology, clearly explains the selection points for grinding processing manufacturers! 【Selection Points for Grinding Processing Manufacturers】 ■1. Covers all grinding and polishing processes necessary for bearing processing, including inner and outer diameter grinding and surface grinding. ■2. Holds various types of equipment for the same grinding process, allowing for the proposal of suitable equipment based on precision and cost. ■3. Strong proposal capabilities for VA (Value Analysis) and VE (Value Engineering) specialized in polishing and grinding processing. ■4. Equipped with comprehensive in-house facilities to handle prototype production before mass production. ■5. Most processing jigs are manufactured in-house, enabling a vertical startup for mass production. KONISHI Manufacturing possesses all five of the above selection points and is capable of a wide variety of polishing processes. *Download the PDF below to receive "VA/VE Achieved through Polishing and Cutting Processing! A Technical Handbook Essential for Engineers"!

• Wafer processing/polishing equipment
• Grinding Machine
• Other contract services

Utilizing our top-tier grinding and polishing equipment in the country, we provide comprehensive services for flat cutting, cylindrical grinding, and internal grinding. Additionally, we offer one-stop support from prototype development to mass production and quality assurance, including the procurement of machined products, pressed items, and forged parts. ■ Plates used in industrial machinery These plates for industrial machinery are made of iron, with an outer length dimension of 62mm and an inner diameter of φ23mm. A machining accuracy of 50μm is required for the width. Therefore, polishing is performed using a rotary grinding machine for the width. ■ Plate components used in construction machinery These plates for construction machinery are made of iron, with an outer diameter of φ110mm, an inner diameter of φ50mm, and a width of 6mm. A roughness of Rmax 0.5 is required for the width, and a parallelism of 2μm is also required. Consequently, at grindingprocessing.com, we use honing machines to perform machining, allowing for simultaneous processing of both sides and up to four pieces at once. As a result, we can achieve higher precision compared to other machining methods, reduce lead times, and offer cost reduction proposals.

• Wafer processing/polishing equipment
• Processing Contract

Utilizing our top-notch equipment for grinding and cutting processes, we provide comprehensive support for flat cutting, cylindrical grinding, and internal grinding. Additionally, we offer one-stop supply support from prototype development to mass production and quality assurance, including the procurement of machined products, pressed products, and forged products. ■ Color for Machine Tools This color for machine tools is made of iron, with an outer diameter of φ75mm, an inner diameter of φ57mm, and a width of 75mm. The machining accuracy is ±25μm for the outer diameter, and the mutual difference in width dimensions between the outer and inner rings is ±1μm. ■ Ring for Machine Tools The material is iron, with an outer diameter of φ58mm, an inner diameter of φ50mm, and a width of 10mm. The machining accuracy required is ±50μm for the outer diameter, ±20μm for the inner diameter, and ±25μm for the width. To achieve this precision, the finishing is done through three processes: width grinding, followed by outer diameter grinding, and then inner diameter grinding.

• Wafer processing/polishing equipment
• Processing Contract

**[Concerns]** Since the required precision cannot be ensured with press processing alone, we were looking for a company that could ensure precision through grinding processing. **[Proposal]** With our flat grinding machines, 1. Double-sided flat grinding machines (vertical, horizontal, carrier-through type) 2. Rotary grinding machines 3. Flat honing grinding machines 4. Other flat grinding machines We can propose processing methods tailored to the customer's needs (precision, processing quantity, price, etc.), so we were entrusted with the task. **[Results]** By applying grinding processing after press processing, we were able to ensure the required precision. Additionally, since we possess various types of grinding machines for each process, we were able to accommodate mass production grinding and high-precision grinding as well. *From the PDF download below, you can download the [VA/VE Realized through Grinding and Cutting Processing! A Technical Handbook Essential for Engineers], which includes basic knowledge of grinding and cutting processing, cost reduction and quality improvement examples, product examples, and more!*

• Wafer processing/polishing equipment
• Processing Contract

In our polishing business, we not only balance precision processing and mass production but also accommodate small lot orders. We provide proposals tailored to customer needs, such as quality and cost, from over 200 pieces of equipment. We have created a technical handbook for design engineers. This book is filled with useful information, including basic knowledge of polishing and cutting processes, VA/VE case studies, and product examples. ◆ We will give you a booklet upon inquiry and request for materials! ◆ * The downloadable version is a digest document containing only the introduction. 【Contents (excerpt)】 - Industries where polishing processes are active - Cost reduction case studies based on polishing and cutting processing methods - Introduction and explanation of products such as shafts, spindles, and pins * For more details, please download the catalog or feel free to contact us.

• Metal bearings

We will introduce a case where cost reduction was achieved by reducing paper processing in the inspection process. When measuring products with pin edges that are prone to burrs on surfaces, conducting dimensional measurements while burrs are present leads to measurement errors, making it impossible to ensure adequate quality assurance. Therefore, for products with burrs, it becomes necessary to perform burr removal through paper processing before measuring on a standard measuring table. As a result, this increases the man-hours required, becoming one of the factors that raise product costs. [Before Improvement] - It becomes necessary to perform burr removal through paper processing before measuring on a standard measuring table. - This increases the man-hours required. *For more details, please refer to the PDF document or feel free to contact us.

• Wafer processing/polishing equipment
• Grinding Machine
• Other contract services

We would like to introduce a case where cost reduction was achieved through centerless continuous grinding of workpieces with step shapes that cannot stand on their own. There are workpieces with step shapes and thin shapes, but in this case, both were unbalanced and could not stand on their own. Unless specified in the drawings, end face grinding is usually not performed, which leads to variations in end face turning accuracy and poor contact between workpieces, making it easier for the workpieces to fall over during centerless grinding. Therefore, weights are placed on both sides of the workpieces, and grinding is performed by clamping them a little at a time. As a result, the time required for setting the workpieces became longer than the processing time for centerless grinding. [Before Improvement] ■ Workpieces with step shapes and thin shapes are both unbalanced and cannot stand on their own. ■ The time required for setting the workpieces increases due to the risk of them falling over. *For more details, please refer to the PDF document or feel free to contact us.

• Wafer processing/polishing equipment
• Grinding Machine
• Other contract services

We will introduce a case that achieved cost reduction by switching from cylindrical grinding to centerless grinding. For products with a ring shape and a small production lot size, we process them on cylindrical grinding machines, which have relatively short setup times, to avoid cost increases due to setup changes. However, there are products that lack sufficient grinding power due to factors such as the size of the grinding wheel on cylindrical grinding machines, which can ultimately lead to increased costs. As the quantity of the parts to be processed increases, it becomes necessary to consider alternative grinding methods. [Before Improvement] ■ There are products on cylindrical grinding machines that lack sufficient grinding power due to factors such as the size of the grinding wheel. *For more details, please refer to the PDF document or feel free to contact us.

• Wafer processing/polishing equipment
• Grinding Machine
• Other contract services

We will introduce a case that achieved cost reduction through simultaneous internal grinding processing of multiple pieces. When processing products with grinding instructions on the end face and internal surface in a washer shape, the processing order is "end face grinding → internal grinding." Internal grinding processing takes a long time, and setup work for each individual part increases the man-hours, leading to higher costs for the parts. For mass-produced products, it is necessary to implement cost reduction measures through changes in the process. [Before Improvement] ■ Processing order: end face grinding → internal grinding ■ Long processing time ■ Setup work for each individual part increases man-hours ■ Variability in external dimensions ■ Gaps between the chuck and the workpiece result in processing one piece at a time *For more details, please refer to the PDF document or feel free to contact us.

• Wafer processing/polishing equipment
• Grinding Machine
• Other contract services

Our company can provide a comprehensive response from procurement of grinding, polishing, pressing, forging, and cutting processes to grinding and polishing, achieving a reduction in production lead time. We have realized the coexistence of "high precision management" and "mass production" by leveraging the management know-how and organizational structure cultivated through the supply of our own products. We will select and propose heat treatment, plating, and painting according to customer requirements. Please feel free to consult with us. 【Features】 ■ Comprehensive response from procurement of pressing, forging, and cutting processes to grinding and polishing ■ Capable of mass production of cylindrical parts with top-class in-house equipment ■ Capable of ultra-high precision processing with flatness and parallelism within 1μm ■ Optimal selection and proposal of heat treatment, plating, and painting according to requested specifications ■ Robust inspection system for mass-produced items requiring high precision management *For more details, please download the PDF or feel free to contact us.

• Wafer processing/polishing equipment
• Grinding Machine
• Other contract services

Our company contributes to enhancing our customers' product competitiveness through product development and cost reduction in mass production achieved by polishing and grinding processes. We propose value analysis (VA) and value engineering (VE) utilizing our polishing and grinding equipment, achieving cost reductions of over 40% compared to existing processing methods, and offering the benefits of mass production to our customers. 【Features】 ■ Covers all aspects of polishing and grinding processes, including internal and external grinding and flat grinding ■ Capable of ultra-high precision processing with flatness and parallelism within 1μm ■ Strong proposal capabilities in VA and VE specialized in polishing and grinding processes ■ Equipped to handle lot sizes from 1 to 100,000 units per month with well-established in-house facilities ■ Achieves a balance of "high precision management" and "mass production" cultivated through the supply of our own products *For more details, please download the PDF or feel free to contact us.

• Wafer processing/polishing equipment
• Grinding Machine
• Other contract services

In our polishing business, we not only balance precision machining and mass production but also accommodate small lot sizes. We offer proposals tailored to customer needs regarding quality, cost, and more from over 200 pieces of equipment. We have created a technical handbook for design engineers. This book is filled with useful information, including basic knowledge of polishing and cutting processes, VA/VE case studies, and product examples. ◆◇ We will give you a booklet as a gift for inquiries and requests for materials! ◆◇ *The downloadable version is a digest document containing only the introduction. 【Contents (excerpt)】 - Industries where polishing processes are active - Cost reduction examples based on polishing and cutting methods - Product introductions and explanations for shafts, spindles, and pins *For more details, please download the catalog or feel free to contact us.

• Metal bearings

KONISHI Manufacturing Co., Ltd. is capable of performing consistent grinding processes for inner diameter grinding, outer diameter grinding, and surface grinding. We possess various types of grinding machines for each grinding process, allowing us to propose the most suitable equipment based on the precision and cost requirements of our customers. In outer diameter grinding, we can accommodate even thin ring shapes using centerless grinding machines (through-type), achieving low costs. *For more details, please download our catalog or feel free to contact us.

• Metal bearings

KONISHI Manufacturing Co., Ltd. is capable of performing consistent grinding processes for inner diameter grinding, outer diameter grinding, and surface grinding. We possess various types of grinding machines for each grinding process, allowing us to propose the most suitable equipment based on the precision and cost requirements of our customers. 【Features of End Face Grinding (Width Grinding)】 ■ For ring and washer shapes, we have Gardner double-sided grinding machines (through type and carrier type) that can accommodate mass production. ■ For single-sided grinding, we can handle mass production with rotary grinding machines (a circular table with a diameter of 1,060 mm allows for multiple single-sided grinding processes at once). ■ If high precision dimensions and flatness are required, we can accommodate this with double-sided surface honing machines. *For more details, please download our catalog or feel free to contact us.

• Metal bearings

KONISHI Manufacturing Co., Ltd. is capable of performing consistent grinding processes for inner diameter grinding, outer diameter grinding, and surface grinding. We possess various types of grinding machines for each grinding process, allowing us to propose the most suitable equipment based on the precision and cost requirements of our customers. 【Features of Inner Diameter Grinding Process】 ■ For washer-shaped products, instead of processing them one by one, multiple pieces are stacked and processed simultaneously, achieving low costs. (Diaphragm chuck type inner diameter grinding machine) ■ If product perpendicularity and coaxiality precision are required, we can accommodate this by processing based on end face and outer diameter references. (Magnet shoe type outer diameter grinding machine) *For more details, please download our catalog or feel free to contact us.

• Metal bearings

KONISHI Manufacturing Co., Ltd. is capable of performing consistent grinding processes for inner diameter grinding, outer diameter grinding, and surface grinding. We possess various types of grinding machines for each grinding process, allowing us to propose the optimal equipment according to the precision and cost requirements of our customers. 1. Inner Diameter Grinding Process - For washer-shaped items, we process multiple pieces simultaneously instead of one at a time, achieving low costs. - If product perpendicularity and coaxiality precision are required, we can accommodate this by processing based on the end face and outer diameter. 2. End Face Grinding (Width Grinding) - We have Gardner double-sided grinding machines for ring and washer shapes, enabling mass production processing. - For grinding on one side only, we can handle mass production with rotary grinding machines. - If high precision in dimensions and flatness is required, we can accommodate this with double-sided surface honing machines. 3. Outer Diameter Grinding Process - Even for thin ring shapes, we can handle them with centerless grinding machines (through type), achieving low costs. *For more details, please download our catalog or feel free to contact us.

• Metal bearings

KONISHI Manufacturing Co., Ltd. is well-known in Japan as a precision manufacturing specialist for ball bearings under the trademark name MRK. Thrust ball bearings consist of a shaft raceway disc mounted on the shaft, a housing raceway disc mounted on the housing, balls, and a cage. They can only be used for axial loads in one direction, are suitable for high-load applications, and have high axial rigidity. *Bearings of sizes not specified in the standards can also be manufactured, so please feel free to consult us. For more details, please contact us or download the catalog.

• Metal bearings
• Plastic bearings
• Processing Contract

KONISHI Manufacturing Co., Ltd. is well-known as a precision manufacturing specialist in Japan for its ball bearings under the trademark name MRK. In addition to manufacturing various types of bearings, we also offer aftermarket parts for automobiles, such as kingpin kits, valve guides, and clutches. 【Products Offered】 ■ Clutch Release Ball Bearings - Used in the clutch section of manual transmission vehicles - Designed to withstand high temperatures and high-speed rotation ■ Kingpin Kits - Pins that connect the knuckle and front axle - Sold as a kit that includes all necessary parts for shaft replacement ■ Valve Guides - Equipped with numerous features such as high precision, wear resistance, and heat resistance - Contains voids that allow for the absorption of lubricating oil, providing excellent lubrication properties ■ Belt Tensioner / Idler Ball Bearings - Designed to withstand high temperatures and high-speed rotation, as well as resist belt vibrations *For more details, please contact us or download the catalog.

• Metal bearings
• Plastic bearings
• Processing Contract

Our company has a base in Vietnam and manufactures low-cost and stable jigs and machine parts. The key factor for stable quality is that more than half of the local workers have undergone training in Japan and have mastered the fundamental techniques, which prevents variations in quality. High-precision parts processing is our specialty. With our technical expertise in ultra-precision processing using various grinding machines, we primarily supply parts for the automotive, home appliance, and electronic device industries, and we accept orders for parts in all fields. 【Products】 ○ Production of jigs and tools ○ Manufacturing of automotive parts, air conditioning equipment, ultra-precision processed products, etc. ○ Harness and lead wire processing and assembly, among others For more details, please contact us or download the catalog.

• Processing Contract
• Grinding Machine

In "external diameter grinding," we select processing methods that match our customers' needs from options such as centerless grinding machines, cylindrical grinding machines, and external diameter grinding machines. We offer a lineup that includes "rings," "plates," and "rollers" using the centerless through-feed type, "gear shafts" using centerless stop grinding, "air tools" using cylindrical grinding machines, and "bushings" using external diameter grinding machines. 【Equipment Available】 ○ Centerless grinding machines ○ Cylindrical grinding machines ○ External diameter grinding machines, etc. For more details, please contact us or download the catalog.

• Processing Contract
• Grinding Machine

The internal diameter grinding machines used for "internal diameter grinding" include shoe type and chuck type, and we select the optimal equipment according to precision and cost. We offer a lineup that includes "rollers" using the shoe type internal diameter grinding machine, "needles" capable of high-precision processing for perpendicularity and coaxiality, "washers" using the chuck type internal diameter grinding machine, as well as "inner rings," "gears," and "front heads" that accommodate thin-walled shapes. 【Available Equipment】 ■ Internal Diameter Grinding Machine - Shoe Type ■ Internal Diameter Grinding Machine - Chuck Type, etc. For more details, please contact us or download the catalog.

• Processing Contract
• Grinding Machine

In "Surface Grinding," we select processing methods that meet our customers' needs from our available equipment, including Gardner grinding machines, rotary grinding machines, and honing machines. We offer a lineup that includes "rings" made with Gardner through-type machines, "stoppers" made with rotary grinding machines, "washers" made with Gardner carrier-type machines, and "thrust plates" and "spacers" made with honing machines. 【Available Equipment】 ○ Gardner grinding machines ○ Rotary grinding machines ○ Honing machines, etc. For more details, please contact us or download the catalog.

• Processing Contract

Our company manufactures various types of bearings, focusing on thrust ball bearings. The "kingpin" is a pin that connects the knuckle and the front axle, located at the pivot point around which the tires change direction when the steering wheel is turned. It is installed tilted towards the inside of the vehicle, improving maneuverability and reducing shocks from the tires. The kingpin kit includes all the necessary parts for shaft replacement. The "valve guide" is made by placing metal powders such as iron and copper in a mold in a specified ratio, compressing them in a forming machine, and then heating and sintering them at a temperature below the melting point. 【Products Offered】 ○ Kingpin Kit ○ Valve Guide For more details, please contact us or download the catalog.

• Other machine elements

Our company manufactures various types of bearings, focusing on thrust ball bearings. A "thrust ball bearing" consists of a shaft raceway plate mounted on the shaft, a housing raceway plate mounted on the housing, balls, and a cage. The "clutch release ball bearing" is used in the clutch section of manual transmission vehicles and is designed to withstand high temperatures and high-speed rotation. The "belt tensioner/idler ball bearing" is used adjacent to the engine, designed to handle high temperatures and high-speed rotation, and has a structure that can withstand belt vibrations. 【Products Offered】 ○ Thrust Ball Bearings ○ Clutch Release Ball Bearings ○ Belt Tensioners ○ Idler Ball Bearings For more details, please contact us or download the catalog.

• Metal bearings
• Plastic bearings

Our company is committed to "contributing to the preservation of the global environment" and "customer-first principles" throughout all processes of manufacturing and selling "MRK" bearing products. We strive to utilize outstanding technology and challenge ourselves in future manufacturing, consistently providing products that meet our customers' needs, aiming for contributions to society and the healthy growth of both the company and individuals. We would like to introduce the equipment that shapes products supporting various fields around the world, including automobiles, electrical appliances, airplanes, and industrial machinery. 【Equipment Introduction】 ■ Flat Grinding Equipment ■ Outer Surface Grinding Equipment ■ Inner Surface Grinding Equipment ■ Other Equipment ■ Measuring Equipment For more details, please contact us or download the catalog.

• Metal bearings
• Plastic bearings
• Processing Contract

Our company specializes in the manufacturing of various types of bearings, with a focus on thrust ball bearings. We also produce automotive parts such as kingpins and valve guides, and the range of MRK products is continually expanding. In our grinding business, we strive to balance precision machining with mass production while also accommodating small lot sizes. We offer proposals tailored to customer needs based on quality and cost from over 200 grinding machines. 【Business Activities】 ■ Manufacturing of various types of bearings ■ Grinding processing For more details, please contact us or download our catalog.

• Metal bearings
• Plastic bearings
• Processing Contract

■Features of Polishing Processing at Konishi Manufacturing Co., Ltd. As a manufacturer of thrust bearings, we incur fewer costs for new jigs when it comes to cylindrical shapes, enabling us to achieve "mass production," "low cost," and "high quality." We have established a jig manufacturing system either in-house or at our factory in Vietnam, and we collaborate with machine manufacturers to propose processing methods that break away from conventional norms, even for processes that are difficult with existing equipment.

• Metal bearings