共進 Product Lineup

Our company specializes in precision machining of round bars ranging from Φ0.1 to Φ50. We can work with materials such as iron, stainless steel, aluminum, and brass. For products with large quantities, processing on dedicated secondary processing machines is also possible. We have approximately 160 automatic lathes at our domestic facilities, and we also own low-frequency vibration cutting machines with high-pressure coolant. Please feel free to contact us when you need our services. 【Overview】 ■ Materials: Iron, stainless steel, aluminum, brass, etc. ■ Number of machines: Approximately 160 automatic lathes at domestic facilities ■ Equipment specifications: Also own low-frequency vibration cutting machines with high-pressure coolant ■ Applications: Automotive parts, construction machinery parts, agricultural machinery parts, industrial machinery parts, medical devices *For more details, please refer to the related link page or feel free to contact us.

• Other cutting tools
• Processing Contract

Our company has a system in place that allows us to handle everything in-house, from cutting to grinding and polishing. We are capable of high-precision machining with centerless grinding, achieving outer diameter dimensional tolerances of ±0.002, roundness tolerances of 0.002, and cylindricity tolerances of 0.003. Additionally, we can perform multi-step grinding with cylindrical grinding machines, as well as outer diameter polishing with both dry and wet outer diameter buffing machines, and end face polishing with dry end face buffing machines. Please feel free to contact us when you need our services. 【Features】 ■ In-house capabilities ■ High-precision machining with centerless grinding ■ Multi-step grinding with cylindrical grinding machines ■ Outer diameter polishing with dry and wet outer diameter buffing machines ■ End face polishing with dry end face buffing machines *For more details, please refer to the related links page or feel free to contact us.

• Grinding Machine
• Wafer processing/polishing equipment
• Processing Contract

Our "rivet joining technology" enables strong connections by creating fine grooves on the shaft side and bringing pressurized deformed metal into those grooves. This technology utilizes plastic deformation at room temperature, allowing for a reduction in cutting volume. Additionally, it enables the joining of dissimilar materials such as different metals, resins, glass, and ceramics. 【Advantages of Rivet Joining】 ■ Reduction in cutting volume ■ Ability to join dissimilar materials (different metals, resins, glass, ceramics) ■ No need for adhesives (no concerns about pot life, etc.) ■ No thermal impact or distortion ■ Only necessary areas require surface treatment (outer diameter polishing, coating, plating, etc.) ■ Achieves high precision (especially for difficult-to-cut materials) ■ Joining of materials that cannot be welded (joining copper and aluminum) *For more details, please feel free to contact us.

• Processing Contract
• Contract manufacturing

Our company possesses joining technology that utilizes the riveting method to combine parts of split all-cut components to manufacture processed products. This results in significant reductions in material costs and processing time, while achieving high precision and maintaining high quality. 【Benefits】 ■ Low cost ■ High precision ■ High strength ■ Energy saving ■ Resource saving ■ Waste reduction *For more details, please download the PDF or contact us.

• Processing Contract