山田製作所 List of Products and Services

We would like to introduce a processing example of "valve seats (parts for agricultural machinery)" that we conducted. Grinding of the R section can also be accommodated through grinding wheel shaping. We also handle the processing of various other machine parts. Our company considers it our mission to "make circles perfectly round" and continuously strives for improved precision. Please feel free to contact us when you need our services. 【Case Overview】 ■ Achievements: 2000/month ■ Possible quantity: 5000/month ■ Material: SCM415 ■ Total length: 36 ■ Outer diameter: 17.8 (0/-0.05) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce a processing case of "differential pinion (automotive parts)" that we conducted. Products with a total length of over 130mm were ground in one plunge using a dual-drive (cylindrical grinding machine). In response to the increasing demand for precision in mechanical parts due to environmental impact reduction and energy conservation, we will continue to provide "perfectly round" products that meet our customers' needs. 【Case Overview】 ■ Achievements: 60,000/month ■ Possible Quantity: 80,000/month ■ Material: SCM20 ■ Total Length: 132.6 ■ Outer Diameter: 20.52 (0/-0.05) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce a processing example of "shaft valves (parts for agricultural machinery)" that we conducted. If there are center holes on both end surfaces, external diameter grinding can be performed at once through dual center drive processing, allowing for precision control of roundness, cylindricity, and coaxiality to within 2μ. For products without heat treatment, we manage the entire process in-house. 【Case Overview】 ■ Achievements: 1500/month ■ Possible Quantity: 3000/month ■ Material: S43C ■ Total Length: 69 ■ Outer Diameter: 14 (-0.008/-0.014) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce a case study of the processing of "camshafts (parts for printing machines)" conducted by our company. We provide stable supply by simultaneously grinding three end faces and two outer diameters within a coaxiality of 3μ. We are also capable of processing various mechanical parts such as "shaft valves," "differential pinions," and "valve seats." 【Case Overview】 ■ Achievements: 1000/month ■ Possible quantity: 3000/month ■ Material: S45C ■ Total length: 68 ■ Outer diameter ・10 (+0.001/-0.001) ・14 (+0.013/+0.008) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

Yamada Manufacturing considers its mission to be "making circles perfectly round" and continuously strives for improved precision. In the case of hammers, cylinders, levers, etc., we utilize our unique improved jigs to securely hold the products with high-precision air chucks, enabling precision management with coaxiality of inner and outer diameters within 5μ. As a "high-precision <perfectly round> supplier" capable of handling orders with precision down to 0.0001 millimeters, we continue to meet our customers' requests. Please feel free to contact us when you need our services. *For more details, please refer to the PDF materials or feel free to reach out to us.*

• Processing Contract

Yamada Manufacturing boasts a flat grinding technology for "thin materials" such as washers, shims, and retaining rings, with precision down to the micrometer level (1μ). In particular, the retaining rings for reduction gears play a crucial role in controlling slippage and impact when moving robots left and right, requiring high precision to achieve excellent operational accuracy while minimizing overall vibration. Our company meets stringent precision requirements with an accuracy of 1μ. Please feel free to contact us when you need our services. *For more details, please refer to the PDF materials or feel free to reach out to us.

• Processing Contract

Our company processes the outer diameters of spindles, spools, bevel gears, and more with high precision. Based on experience and data, we manage processing conditions, temperature control of grinding fluids, and selection of grinding wheels to precisely control outer diameter dimensions within 2μ. We also utilize grinding wheel shaping to perform outer diameter grinding of R-shaped parts and simultaneous grinding of multiple locations, which contributes to cost reduction. Please feel free to contact us when you need our services. *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce a case study of processing "pistons (parts for construction machinery)" that we conducted. The end faces were ground using a cylindrical grinding machine, ensuring a perpendicularity of 0.01 or less. If there are center holes on both end faces, external diameter grinding can be performed at once through dual center drive processing, allowing for precision control of roundness, cylindricity, and coaxiality to 2μ (microns = 0.001mm) or less (up to a total length of 150mm). 【Case Overview】 ■ Achievements: 500/month ■ Possible Quantity: 1000/month ■ Material: SCM415L ■ Total Length: 27 ■ Outer Diameter: φ34 (-0.02/-0.03) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce a machining case of a "spool valve" used for switching directions and paths. Our company precisely manages a workpiece with a total length of 200mm, with outer diameter dimensions of 3μ (microns = 0.001mm) or less, roundness of 2μ or less, and cylindricity of 3μ or less. By improving the jig (Kere), we can perform simultaneous grinding processing even at distant positions. 【Case Overview】 ■ Achievements: 2000/month ■ Possible quantity: 3000/month ■ Material: SCM415 ■ Total length: 44 ■ Outer diameter: 9.525 (-0.005/-0.008) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce a machining example of a "spool valve" used for switching directions and paths. Our company precisely manages workpieces with a total length of 200mm to an outer diameter dimension of less than 3μ (microns = 0.001mm), roundness of less than 2μ, and cylindricity of less than 3μ. Furthermore, we perform grinding after hard chrome plating to meet the required precision of less than 2μ for outer diameter dimensions. Please feel free to contact us when you need our services. 【Case Overview】 ■ Achievements: 1500/month ■ Possible quantity: 5000/month ■ Material: SCM415N ■ Total length: 100mm ■ Outer diameter: 14 (+0.009/+0.007) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce a processing example of a "poppet valve" that controls hydraulic pressure such as oil pressure. The coaxiality between the tapered section and the outer diameter can be manufactured with a precision of 2μ (microns = 0.001mm) or less. Due to the high precision, the oil leakage at the seat section when hydraulic components are fitted is reduced, leading to stable oil volume and longer product lifespan. 【Case Overview】 ■ Achievements: 300/month ■ Possible quantity: 5000/month ■ Material: SCM415 ■ Total length: 23mm ■ Outer diameter: 12 (-0.016/-0.034) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce a processing example of a "poppet valve" that controls hydraulic pressure such as oil pressure. We also perform grinding to achieve a reverse taper shape. Simultaneous grinding is carried out using a CNC cylindrical grinding machine. Our company can manufacture with a coaxiality of 2μ (microns = 0.001mm) or less between the tapered part and the outer diameter. Please feel free to contact us when you need our services. 【Case Overview】 ■ Achievements: 1000/month ■ Possible Quantity: 5000/month ■ Material: SCM435 ■ Total Length: 23mm ■ Outer Diameter: 12 (-0.010/-0.020) * For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce a processing example of a "poppet valve" that controls hydraulic pressure such as hydraulic oil. We implement grinding wheel shaping as much as possible. By performing simultaneous grinding with cylindrical grinding, we maintain coaxiality within 3μ. Due to the high precision, the oil leakage at the seat area when hydraulic components are fitted is reduced, leading to stable oil volume and longer product lifespan. 【Case Overview】 ■ Achievements: 1000/month ■ Possible quantity: 5000/month ■ Material: SCM415 ■ Total length: 39 ■ Outer diameter: 14 (-0.030/-0.040) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce a machining example of a "poppet valve" that controls hydraulic pressure such as oil pressure. After removing thermal distortion to below 0.05, we perform cylindrical grinding. The tapered and straight sections are ground simultaneously. Our company pursues sub-micron precision and responds to various needs. Please feel free to contact us when you require our services. 【Case Overview】 ■ Achievements: 10,000/month ■ Possible Quantity: 10,000/month ■ Material: SCM415N ■ Total Length: 63 ■ Outer Diameter: 8 (-0.008/-0.014) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce a processing example of a "poppet valve" that controls hydraulic pressure such as oil pressure. In the grinding process, we adopted a unique method. We ensure coaxiality within 2μ, surface roughness within 1.6S, and cylindricality of the outer diameter within 3μ, providing stable supply. 【Case Overview】 ■ Achievements: 5000/month ■ Possible quantity: 10000/month ■ Material: SCM415 ■ Total length: 23mm, etc. ■ Outer diameter: φ14 (-0.030/-0.040) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

"Morasan" is a workplace improvement tool that automatically closes the valve and stops the water when a certain level is reached, preventing water leakage troubles. By eliminating the series of processes that involve filling the agent every time the cutting fluid or grinding fluid runs out, opening the valve, worrying about water accumulation while working, and then closing the valve, operations can be significantly streamlined just by removing the need to open and close the valve. Automation of the filling of agents is also possible by combining it with products from other companies. We can also provide proposals for the entire equipment, so please feel free to contact us. 【Features】 ■ Prevents water leakage troubles ■ Eliminates the need to open and close the valve from the series of processes ■ Reduces manpower ■ Allows for concentration on work *For more details, please refer to the PDF document or feel free to contact us.

• valve

Our company provides high-quality hydraulic components for agricultural machinery and industrial machinery, receiving high praise from our customers. We excel in shaping grinding wheels to the product's specifications and finishing stepped areas in a single processing operation, making us well-suited for mass production by consolidating processes. Additionally, we perform outer diameter grinding using centerless methods (approximately Φ7 to Φ50), flat grinding with rotary grinders and NC double-sided grinders (approximately Φ5 to Φ50), and inner diameter grinding with inner diameter grinders. 【Business Activities】 ■ Manufacturing and processing of precision machine parts for agricultural machinery, hydraulic equipment, electric tools, etc. - Production of various shipbuilding components - Production of various shafts and spools - Grinding of various automotive parts, etc. *For more details, please download the PDF or feel free to contact us.

• Other machine elements