トキワ精工 List of Products and Services

At Tokiwa Seiko, we provide a one-stop service for a series of processes including material procurement, manufacturing, and inspection in powder metallurgy molds, carbide processing, and precision parts machining. We have established a production system that can respond flexibly and quickly, ensuring precision and meeting a wide range of customer requests. 【Do you have any of these concerns?】 ◎ I want to change the material of existing metal parts to carbide or heat-treated high-hardness materials. 　→ We have well-equipped facilities and technology for processing carbide and high-hardness materials. ◎ I want the same part without a drawing. 　→ If you consult with us, we can create a drawing for an equivalent part and proceed with manufacturing. ◎ I want to improve the quality, wear resistance, and durability of the product. 　→ We offer suggestions to enhance the performance of parts through material selection and surface treatment, and we welcome consultations on the structure and manufacturing methods of parts you wish to develop. *For more details, please refer to the materials. Feel free to contact us.

• Contract manufacturing
• Processing Contract
• Other molds

Yaki-bame is a joining method that utilizes the action of metal expanding with heat and contracting with cooling. Specifically, it involves heating a part with a hole to expand it and then fitting another part, made slightly larger than the diameter of the hole, into the expanded hole. After that, natural cooling causes the hole to contract, tightening the fitted part. This is how the two parts are joined together. Brazing is one method of joining metals, where molten "brazing material" is poured into the area to be joined, and after cooling and hardening, multiple components can be joined together. It is distinguished from welding because it does not melt the parts themselves. It may be easier to understand if you think of it as similar to soldering. *For more details, please refer to the PDF or feel free to contact us.*

• Processing Contract

Wrapping refers to the process of polishing metal to smooth its surface. In mechanical finishing, a clay-like abrasive material mixed with diamond particles is placed into the target hole, and the abrasive is polished inside the hole by using hydraulic piston motion. The processing size is approximately up to φ100*100L, but it is also possible to polish eccentric holes, angular holes, and other irregularly shaped holes. Moreover, the hand finishing wrapping at Tokiwa Seiko is not just about polishing. In molds that require ultra-high precision, mechanical processing alone cannot meet the required accuracy. The final adjustments are made through mechanical processing, followed by the wrapping process, which not only finishes to a mirror surface but also allows for dimensional adjustments at the micron level. This is a very important and specialized process that achieves levels unattainable by mechanical processing and is one of the key technologies that Tokiwa Seiko takes pride in. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

The secret of Tokiwa Seiko's technology, which responds to diversifying needs, lies in its wide range of in-house equipment. We manufacture electrodes made of copper and copper tungsten using machining centers, and by sparking between the electrode and the workpiece in the processing fluid, we engrave shapes into the workpiece. We also have a track record of processing conductive ceramics. Complex shapes, irregular shapes, and machining of square-shaped blind holes and corners, which are difficult to process with cutting, grinding, or wire cutting, can be achieved with our die-sinking electrical discharge machining machines. We have adopted the system3R Micro Standard Mini System and equipped all machines with ATC (20 tools), allowing for long hours of processing, such as at night. Die-sinking electrical discharge machining machines: Mitsubishi EA12V (2 units), EA12E If you have situations where you would like to request processing only with this equipment, we can also perform pinpoint processing using available machines. Please contact us, and we will report on the operational status of the machines. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

The secret of Tokiwa Seiko's technology, which responds to diversifying needs, lies in its wide range of in-house equipment. The profile grinding machine (Amada Washino GLS-135AS), as it is called "optical contour grinding machine," projects the processing area of the product 20 times larger by shining light on it, allowing for grinding that follows the shape of the product. It can grind small grooves and gear shapes, as well as cylindrical grinding for items like roll forming and stepped pins, and it is capable of processing fine corner radii of 0.06 to 0.08R. Grinding wheels used: BN, diamond, WA, etc. Wheel diameter: from φ60 to φ180 Wheel stroke: 135 mm Compatible materials: from raw materials to hardened steel, carbide, and cermet, as well as many other materials. If you have a situation where you would like to request processing with this equipment only, we can also perform pinpoint processing using available equipment. If you contact us, we will report on the machine's operating status. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

The secret of Tokiwa Seiko's technology, which responds to diversifying needs, lies in its wide range of in-house equipment. In cylindrical grinding, we offer various grinding wheels such as diamond, borazon, and WA, enabling us to accommodate many materials. For powder metallurgy mold punches, it is common to finish the outer diameter with a mirror surface. Typically, two processes are required: finishing the dimensions with cylindrical grinding and then polishing to achieve a mirror finish. However, at Tokiwa Seiko, we have developed a method that allows us to finish the dimensions and achieve a mirror surface simultaneously during the cylindrical grinding process, enhancing efficiency. If you have specific requests such as "I only want to rely on this equipment for processing," we can also perform pinpoint processing using available equipment. Please contact us, and we will provide updates on the machine's operational status. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

The secret of Tokiwa Seiko's technology that meets diversifying needs lies in its wide range of in-house equipment. The "Mitsui Seiki 300G" features a grinding wheel that rotates at high speeds (up to 90,000 RPM) and has a spindle that rotates in a planetary motion, along with a very complex motion that includes vertical movement (approximately 70 mm chopping stroke). This allows for grinding of eccentric shafts and holes, which is typically difficult, as well as the creation of programs for grinding irregular inner and outer shapes. Sometimes, delicate processing is done by attaching headphones to listen to the vibrations of the workpiece while proceeding with the machining. The grinding wheels used include electroplated borazon and diamond, as well as bonded WA and vitrified CBN types with shafts. *For more details, please refer to the PDF or feel free to contact us.*

• Processing Contract

The secret of Tokiwa Seiko's technology, which responds to diversifying needs, lies in its wide range of in-house equipment. While surface grinding machines naturally grind flat surfaces, they also serve as a standard for processing various products, making them extremely important equipment that establishes Tokiwa Seiko's precision standards. The accumulated know-how allows us to minimize issues such as the so-called "drum" problem that occurs at the entrance and exit of grooves when processing thin plates and groove widths. Table size: 300*600 Grinding wheels used: We have a variety of grinding wheels available, from diamond and borazon to general wheels like WA and SG, allowing us to accommodate diverse materials. If you have specific situations such as "I only want to request processing with this equipment," we can also perform pinpoint processing using available equipment. If you contact us, we will report on the machine's operating status. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

The secret of Tokiwa Seiko's technology that meets diverse needs lies in its wide range of in-house equipment. This is primarily used for processing copper electrodes necessary for electrical discharge machining. With high-speed rotation and the use of small-diameter tools, it is suitable for precision machining. For electrode processing, we have adopted the 'system3R Micro Standard Mini System' to achieve high precision and efficient workability. Additionally, by utilizing the characteristics of the ROBODRILL, we aim to further improve processing efficiency by using it for 'direct engraving processing' to create complex and fine shapes on hardened steel after heat treatment. Manufacturer: FANUC Model: ROBODRILL α-T14iE X500*Y400*Z330 Spindle: No. 30, 20,000 RPM If there are situations such as "I only want to request processing with this equipment," we can also perform pinpoint processing using available equipment. If you contact us, we will report on the machine's operating status. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

The secret of Tokiwa Seiko's technology, which responds to diversifying needs, lies in its wide range of in-house equipment. The machining center 'Mori Seiki NVD4000' is used primarily for finishing processes, specializing in 3D shapes and dedicated processing for hardened steel. It can process difficult materials such as die steel, high-speed steel, and powder high-speed steel with micron-level precision, and by being equipped with a coolant cooler, it achieves more stable processing in an environment with minimal thermal changes. Table size: 600*400*400 If you have a situation where you would like to request processing specifically with this equipment, we can also perform pinpoint processing using available machines. Please contact us, and we will provide updates on the machine's operating status. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

The secret of Tokiwa Seiko's technology, which responds to diversifying needs, lies in its wide range of in-house equipment. The machining center 'Mitsubishi Heavy Industries M-V60E' accommodates a wide variety of machining processes, from heavy cutting to delicate finishing. It is equipped with an indexing table that allows for the rotation of the workpiece, enabling it to handle products that require indexing. Leveraging the high rigidity of BT50, it excels in machining large components such as die sets, ingots, and machining from round materials. Table size: 1000*600*550 If you have situations like "I only want to request processing with this equipment," we can also perform pinpoint processing using available equipment. If you contact us, we will report on the operating status of the machines. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

The secret of Tokiwa Seiko's technology, which responds to diversifying needs, lies in its wide range of in-house equipment. Utilizing features of high rigidity and high precision, we actively incorporate machining processes that not only include standard turning but also involve cutting hardened steel with a hardness of HRC 60 or higher to finish dimensions and shapes, thereby improving machining efficiency. 【Equipment Introduction】 NC Lathe - Manufacturer: Mori Seiki - Model: NL2500 - Maximum Machining Diameter: φ356 - Maximum Machining Length: 70 mm Materials with machining experience: Die steel such as SKD11, high-speed steel such as SKH51, Hastelloy If you have situations like "I only want to request machining with this equipment," we can also perform pinpoint machining using available equipment. Please contact us, and we will report on the machine's operational status. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

The secret of Tokiwa Seiko's technology, which responds to diversifying needs, lies in its wide range of in-house equipment. Amid the rapid advancement of NC (numerical control) machine tools, general-purpose machines are becoming increasingly rare. However, these machines provide the opportunity to learn the tactile skills and techniques that can only be gained through them, fostering the ability to think and innovate. We believe that having this foundation is essential for fully utilizing the performance of NC machines, so we recognize the importance of general-purpose machines and wish to continue valuing them in the future. If you have situations such as "I only want to request processing with this equipment," we can also perform pinpoint processing using available machines. If you contact us, we will report on the operating status of the machines. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

The secret of Tokiwa Seiko's technology, which meets diversifying needs, lies in its wide range of in-house equipment. The "Mitsubishi Electric FA10PS" is a high-precision model that uses wire with a diameter of φ0.15 to φ0.25, demonstrating its power in fine processing. It is equipped with processing conditions for aluminum, copper, steel, carbide, and graphite. The taper angle can accommodate up to 15°, allowing for processing with different shapes on the upper and lower sides. An external rust prevention device option can help suppress rust formation on products. 【Equipment Introduction】 Wire Electrical Discharge Machine - Manufacturer: Mitsubishi - Model: FA10PS If you have a situation where you would like to request processing specifically with this equipment, we can also perform pinpoint processing using available machines. Please contact us, and we will report on the machine's operating status. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

The secret of Tokiwa Seiko's technology, which responds to diversifying needs, lies in its wide range of in-house equipment. The "Makino Milling U53K" can process up to 30mm in length, and by attaching a 20kg spool of wire to the external wire supply device, it allows for long hours of operation. It is equipped with processing conditions for aluminum, copper, steel, carbide, and graphite. With a wide table stroke, it can accommodate various work shapes, and the arrangement of processing conditions is easy, making it a versatile type that supports a wide range of machining. 【Equipment Introduction】 Wire Electrical Discharge Machine - Manufacturer: Makino - Model: U53K If you have specific requests such as "I only want to rely on this equipment for processing," we can also perform pinpoint processing using available equipment. If you contact us, we will report on the machine's operating status. *For more details, please refer to the PDF or feel free to contact us.

• Processing Contract

Tokiwa Seiko started primarily with the manufacturing of powder metallurgy molds and precision press molds. By owning various equipment in-house, we have established a series of processes such as material procurement, cutting, heat treatment and surface treatment, grinding, mold engraving and wire discharge machining, finishing, and inspection as a "consistent production system." 【Examples of Support】 ■ Purchasing personnel: "I'm overwhelmed with complicated management tasks despite being busy." ⇒ With completed products arriving in one processing step, the burdensome and complex management tasks are reduced. ■ Design personnel: "I received a sudden request for design changes from a customer, and I'm in trouble." ⇒ Quick responses are possible, so even sudden changes can be swiftly implemented in-house, providing peace of mind. ■ Manufacturing personnel: "The mold was damaged on the production floor." ⇒ With our agile response, we can minimize risks and alleviate concerns. *Even if you don't have a drawing, if you have the part on hand, we can measure it and produce the same item. If you have a simple sketch, we can work together to create it. For more details, please refer to the PDF or feel free to contact us. (We have a list of processing and measurement equipment available.)

• Processing Contract
• Contract manufacturing

Tokiwa Seiko is an expert in "hard material processing," utilizing cutting-edge equipment to meet your needs. Since we cut directly with tools, we can control the position of the cutting edge directly, achieving high dimensional accuracy and accommodating complex shapes. Additionally, unlike traditional electrical discharge and grinding processes that create a softened layer and require a polishing step, our method eliminates the need for polishing, allowing us to finish in one process, which enables us to offer short delivery times and low costs. We process high-hardness hardened materials and carbide materials that are difficult to machine through cutting and turning. With our comprehensive capabilities, including cylindrical, surface, and internal grinding, we respond to our customers' advanced requests with abundant experience and technology. If you have previously given up on using carbide due to cost or delivery time, please contact Tokiwa Seiko. 【Features】 - Shortened delivery times - Cost reduction in carbide processing stages - Capability to process complex shapes *For more details, please contact us or download the catalog.

• Plastic processing machines (cutting and rolling)

Our company possesses a variety of processing equipment in-house to manufacture parts with a wide range of types and small quantities across multiple processes, providing a "one-stop service." If you provide us with drawings, we can deliver finished products. (※Even without drawings, we can accommodate handwritten notes. If you have a simple sketch, we can work together to create the product.) We guarantee precision and can flexibly respond to a diverse range of requests. We are confident that we can meet your needs in various situations. 【Do you have any of these concerns?】 ■ Purchasing personnel: "I'm busy and overwhelmed with troublesome outsourcing management tasks." ■ Design personnel: "I received a sudden request for design changes from a customer, and I'm in trouble." ■ Manufacturing personnel: "The mold broke down on the production floor." ※ Please refer to the PDF data available for download regarding "integrated production" case studies.

• Processing Contract
• Contract manufacturing

At Tokiwa Seiko Co., Ltd., we possess a variety of processing equipment in-house to manufacture parts with a wide range of types and small quantities across multiple processes, providing a "one-stop service." We not only guarantee precision but also flexibly respond to a diverse array of requests. We are confident that we can meet your needs in various situations. 【Do you have any of these concerns?】 ■ Purchasing personnel: "I'm busy, but I have to deal with a lot of troublesome management." ■ Design personnel: "I received a sudden request for design changes from a customer, and I'm in trouble." ■ Manufacturing personnel: "The mold broke down on the production floor." *Please refer to the PDF data available for download for examples of our "one-stop service."

• Processing Contract
• Contract manufacturing

At Tokiwa Seiko Co., Ltd., we possess a variety of processing equipment in-house to manufacture parts that require a wide range of processes in small quantities, providing a "one-stop service." We not only guarantee precision but also flexibly respond to a diverse array of requests. We are confident that we can meet your needs in various situations. 【Examples of Support】 ■ Purchasing personnel: "I'm overwhelmed with complicated management tasks despite being busy." ⇒ With our service, finished products arrive in one processing step, reducing the burden of complicated management tasks. ■ Design personnel: "I received a sudden request for a design change from a customer, and I'm in trouble." ⇒ We can respond quickly, so even sudden changes can be implemented immediately within the company, providing peace of mind. ■ Manufacturing personnel: "The mold broke down on the production floor." ⇒ Our agile response minimizes risks and alleviates concerns. For more details, please refer to our catalog or feel free to contact us.

• Processing Contract
• Contract manufacturing

At Tokiwa Seiko Co., Ltd., we offer wire cutting processing services using wire electrical discharge machines (Mitsubishi Electric FA10PS / Makino Milling Machine U53K). If you have specific requests such as "I only want to rely on this equipment for processing," we can also perform pinpoint processing using available equipment. Please contact us, and we will provide updates on the machine's operating status. 【Service Details】 ■ Processing of hardened steel and carbide - Press molds (SKD11, carbide G2) ■ Cutting multiple pieces from flat plates and round materials - Cuw electrode blanks, SKH51 test pieces ■ Layer cutting of thin plates such as spacers - SUS304 (thickness 0.05, 0.1 to 0.6, 0.8, 1.0) For more details, please refer to our catalog or feel free to contact us.

• Processing Contract

Tokiwa Seiko Co., Ltd. offers profile grinding services using an NC profile grinder (Washino GLS-135AS). We accommodate "contour grinding" for brazed products such as copper and cermet, "cylindrical grinding" for processing roller tips, pins, and shaft grooves, and "processing with indexing devices" for uniform shapes (gears, external keys), among others. We also accept profile machining alone. We can perform pinpoint machining using available equipment. 【Service Details】 ■ Grooves (grinding wheel stroke 135mm) ■ Roll grinding using cylindrical devices (maximum processing diameter Φ100) ■ Processing with indexing devices (chopping stroke 95mm) For more details, please refer to our catalog or feel free to contact us.

• Processing Contract

Tokiwa Seiko Co., Ltd. offers jig grinding services using a CNC jig grinding machine (Mitsui Seiki 300G) and two other general-purpose machines. We accommodate "hole processing" such as high-precision pitches, blind holes, and taps, "eccentric shaft processing" for crankshafts (S45C, FC280, SCM435), and "contour shape processing" for square, cam shapes, and key grooves. We also accept orders for jig grinding processing alone. 【Service Details】 ■ Multiple hole processing (maximum hole diameter Φ100, maximum processing depth 75mm) ■ Eccentric shaft processing (maximum shaft diameter Φ80) ■ NC contour processing for irregular shapes (chopping stroke 95mm) For more details, please refer to our catalog or feel free to contact us.

• Processing Contract

Tokiwa Seiko Co., Ltd. offers abrasive flow polishing services using extruded horns. By slowly flowing a viscoelastic body (such as silicone rubber) mixed with abrasives like SiC and diamond under high pressure, we smooth the inner surfaces of workpieces, including irregular holes. Burr removal is also possible. 【Features】 ■ Abrasive flow processing using diamond media for polishing tools - Superior in various aspects compared to manual work ■ Improves the lifespan and quality of molds - High versatility as a single machine, achieving time reduction and cost savings For more details, please refer to our catalog or feel free to contact us.

• Processing Contract

Our "Inspection System" conducts various measurements using a range of measuring instruments in a measurement room maintained at a constant 23°C to meet the quality demanded by our customers. We also perform various inspections during the processing stages, and in the final stage, we conduct even more precise inspections to ensure that dimensional errors are kept to a minimum. Maintaining stable quality is essential, and we believe that improving and sustaining this quality will lead to true trust from our customers, and we are committed to this effort. For more details, please refer to our catalog or feel free to contact us.

• Other machine elements

In our "Precision Parts Processing," we have developed expertise through mold making and have expanded into the field of precision parts processing, receiving high praise from various sectors. Focusing on NC lathes and high-precision machining centers, we respond to a wide range of customer needs, from precision parts cutting to single items and medium lots of new products and prototype parts. For more details, please refer to our catalog or feel free to contact us.

• Processing Contract

Our company utilizes equipment such as NC electric discharge machines, NC profile grinders, and NC jig grinding machines to process high-hardness hardened materials and cemented carbide, which are difficult to machine by cutting. With our comprehensive capabilities, including cylindrical, flat, and internal surface polishing, we respond to our customers' advanced requests with abundant experience and technology. For more details, please refer to our catalog or feel free to contact us.

• Processing Contract

Tokiwa Seiko Co., Ltd. has changed its business operations in accordance with the times since its establishment in 1937. We began producing molds around 1955, primarily manufacturing powder metallurgy molds and precision press molds. We are constantly challenging ourselves to realize high-precision products with a flexible and rapid production system to accurately embody our customers' wishes and meet their trust and expectations. We can achieve complex shapes with high precision, so please feel free to consult us first. 【Features】 ■ Capable of complex and high-precision molding ■ Stable mass production possible ■ Alloys can be created ■ Materials with different properties can be mixed ■ Simple and economical processes ■ Oils can be mixed and filters can be created *For more details, please refer to the PDF materials or feel free to contact us.

• Press Dies

Tokiwa Seiko, founded in 1937, has adapted its business operations to the times and began producing molds around 1955. We have primarily manufactured powder metallurgy molds and precision press molds. Currently, leveraging the know-how gained from mold production, we have expanded our field into ultra-precision component processing and have received high praise from various sectors. **Features** - Mainly manufacturing powder metallurgy molds, precision machine parts, and precision tools. - By owning various equipment in-house, we have established a "consistent production system" that encompasses a series of processes including material procurement, cutting, heat treatment and surface treatment, grinding, die sinking and wire electrical discharge machining, finishing, and inspection. - In addition to guaranteeing precision, we are also able to flexibly respond to a wide variety of requests, and we are confident that we can meet your satisfaction in various situations. - For detailed know-how materials, please download and view our catalog.

• Casting Machine