宮本製作所 List of Products and Services

High-precision processing of complex-shaped products using 60 years of aluminum processing technology know-how since our establishment" Miyamoto Manufacturing Co., Ltd. was founded in 1961 with the aim of machining aluminum parts for home appliances. Based on the aluminum processing technology know-how cultivated over more than 60 years, we perform cutting processing of aluminum die-cast parts with complex and irregular shapes. Our company also supports the processing of aluminum die-cast parts during the prototype and development stages, proposing processing methods that take mass production into account to prevent issues such as "the accuracy was achieved during the prototype and development phase, but it does not hold in mass production.

• aluminum
• Hydraulic Equipment

This is a technical handbook specialized in the processing of powder magnetic cores and soft magnetic materials for designers and engineers. Based on the questions and answers we receive from our customers daily, we are sharing technical know-how related to the processing of soft magnetic materials. Additionally, we have included numerous case studies on the processing of powder magnetic core motor cores, utilizing Miyamoto Seisakusho's expertise in sintered metal processing. This is a must-see for those considering the introduction of soft magnetic components that will drive the next generation of manufacturing!

• Other motors
• Other metal materials

A Must-Have Book for Designers and Developers of Sintered Metal Products Miyamoto Manufacturing has published a "Technical Handbook" that compiles technologies related to sintered metal processing and design for designers and development engineers. The technical handbook provides illustrated explanations of specific VA/VE proposals aimed at achieving cost reduction and quality improvement from the design and development stages, based on actual case studies.

• Other machine elements

We would like to introduce a cost reduction case where we successfully improved operations by repurposing unused end mills into stepped drills. After performing the pilot hole cutting, we found that the secondary operation of chamfering the end face resulted in poor work efficiency due to the two-step process. Upon reviewing the process, we determined that it would be better to modify the tool into a drill rather than an end mill, and we proposed tool recycling from our company. By reusing the shank of the used end mill and adding new cutting edges, we transformed it into a stepped drill capable of both drilling and chamfering in one operation. As a result, we consolidated the two processes of drilling and chamfering into one, thereby improving work efficiency. [Concerns Before Modification] ■ Poor work efficiency due to performing chamfering after pilot hole cutting, resulting in two operations. *For more details, please refer to our catalog or feel free to contact us.*

• End Mills

We would like to introduce a cost reduction case where our company achieved a 50% reduction in processing time using a two-stage straight vanishing drill. Previously, we were processing holes of different diameters with two drills, which required two separate operations and resulted in inefficiency. In response to this issue, we modified the straight vanishing drill to have a two-stage diameter, transforming it into a stepped vanishing drill. This allowed us to process stepped holes (holes of different diameters) in a single operation. In addition to completing two processing tasks in one go, we improved coaxiality precision, which led to reduced waste, and through work consolidation, we successfully enhanced productivity, resulting in various benefits. [Concerns before modification] ■ Processing holes of different diameters with two drills ■ Required to be done in two separate operations, leading to inefficiency *For more details, please refer to the catalog or feel free to contact us.

• drill

This processed product made from iron-based sintered metal is a gear used in the automotive and motorcycle industries, produced by a machining center. The teeth of the gear are shaped and manufactured through molding, while the machining center performs drilling, reaming, and chamfering on the boss section of the gear with a φ3 hole. Due to the strict tolerance requirements for the inner diameter relative to the outer diameter of the gear, high-precision inner diameter drilling is required.

• gear

We would like to introduce a case where we successfully reduced chatter and cut processing time by 30% by converting a 4-flute vanishing reamer to a 2-flute one. Due to poor chip evacuation during processing, chatter was likely to occur, making it difficult to maintain processing accuracy. In response to this issue, we modified the tips of two of the flutes of a 4-flute stepped vanishing reamer to allow for easier chip escape. As a result, processing accuracy improved. With the improved chip evacuation, chatter was eliminated, leading to enhanced processing accuracy and a reduction in processing time, resulting in various positive effects. [Issues Before Modification] - Poor chip evacuation during processing - Chatter was likely to occur, making it difficult to maintain processing accuracy - A high number of defective products were produced *For more details, please refer to the catalog or feel free to contact us.

• drill

We would like to introduce a case where we successfully reduced work time by one-third and cut down on defective products by sharpening a drill-shaped blade at the tip of a reamer. Due to the strict precision requirements for hole processing, we were facing inefficiencies as we divided the work into three stages: center drilling, pilot drilling, and reaming. In response to this issue, we modified the tip of a straight reamer to a 60-degree angle and added cutting edges to create a 60-degree bottom cutting reamer. As a result, we succeeded in completing the roles of center drill, pilot drill, and reamer finishing with just one tool. [Concerns Before Modification] - The work was divided into three stages: center drill, pilot drill, and reaming. - Using three different tools was very inefficient. *For more details, please refer to the catalog or feel free to contact us.*

• Reamer

We would like to introduce a case where the work efficiency was significantly improved by changing the tip angle of the drill. There is a limit to the number of tools that can be attached to the machining machine, and processing cannot be done without removing something. As a result, the work was very inefficient due to having to replace the cutting tools each time. In response to this issue, our company modified the tip angle of the straight drill to 90°, allowing it to have three functions: positioning, drilling, and chamfering. As a result, we were able to consolidate three cutting tools into one drill, successfully achieving a significant reduction in work time. [Concerns before modification] - There is a limit to the number of tools that can be attached to the machining machine, and processing cannot be done without removing something. - The work was inefficient due to having to replace the cutting tools each time. *For more details, please refer to the catalog or feel free to contact us.

• drill

We would like to introduce a case where our company successfully consolidated the spiral reamer process into three steps, reducing work time to one-third and preventing the occurrence of defective products. To complete a single hole, three drills were required, necessitating three processes. Additionally, there was a limitation on the number of tools that could be mounted on the machining machine, leading to a desire for as much process consolidation as possible. In response to this challenge, our company modified the spiral reamer by reducing its outer diameter and creating a two-stage design with a 45° angle on the cutting edge, allowing for chamfering as well. As a result, we successfully consolidated three processes into one. Furthermore, the coaxiality improved, and we also succeeded in preventing the occurrence of defective products. [Challenges Before Modification] - Completing a single hole required three drills, necessitating three processes. - There was a limitation on the number of tools that could be mounted on the machining machine, leading to a desire for as much process consolidation as possible. *For more details, please refer to the catalog or feel free to contact us.*

• Reamer

This sprocket is made from sintered metal (sintered alloy, powder metallurgy) and undergoes processes such as lathe machining, deburring, heat treatment, finishing lathe work, pre-drilling, and tapping. By dividing the processes into primary processing up to heat treatment and secondary processing after heat treatment, the main machining of the sprocket teeth is performed while the hardness is low, and after heat treatment, when the hardness is high and machining becomes difficult, only finishing work is carried out, thereby reducing processing time.

• gear

This is a motor core made of soft magnetic material. This core is made from a powder metallurgy magnetic core and is a product processed from a molded body created under pressure without sintering. Processing such soft magnetic materials is very difficult because the material itself is brittle, yet it has a high hardness. Therefore, when processing the molded body of the powder metallurgy magnetic core, fine adjustments are necessary regarding methods of fixation with a chuck and other strengths. Additionally, because soft magnetic materials are prone to chipping at the corners during processing, attention must be paid not only to the chuck but also to the tools and processing conditions. Our company achieves the processing of soft magnetic materials using special tools that incorporate our unique know-how.

• Electrical equipment parts

The "Cutting Tool Regrinding Technical Handbook" is a technical catalog for machining center and lathe operators. We propose extending the life of cutting tools and reducing costs through regrinding. It includes a wealth of information such as basic knowledge of cutting tool regrinding, case studies, and price lists. [Contents] ■ Basic knowledge of cutting tool regrinding ■ Case studies of regrinding by cutting tool name ■ Regrinding price list by cutting tool material ■ Publisher information *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing
• Processing Contract
• Other cutting tools