Last Updated： Aggregation Period:Sep 24, 2025～Oct 21, 2025
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Sep 24, 2025～Oct 21, 2025
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Sep 24, 2025～Oct 21, 2025
This ranking is based on the number of page views on our site.
1～13 item / All 13 items
High-precision outer diameter super finishing spool after cutting, heat treatment, and special deburring, with an outer diameter tolerance range of 2μ.
The material being machined is chrome-molybdenum steel, which is subjected to carburizing and quenching after cutting, and then the outer diameter is finished with super finishing grinding.
![[Example] Gas nitriding and blackening treatment of "spool" and centerless grinding.](https://image.mono.ipros.com/public/product/image/4cb/2000317805/IPROS8414908328312522901.PNG?w=280&h=280)
Introduction of case studies on gas nitriding, blackening treatment, and centerless grinding of general-purpose parts "spools."
This is a case study on gas nitriding, blackening treatment, and centerless grinding of a general-purpose part called "spool." The material is supplied by the customer, and heat treatment and centerless grinding are performed. The grinding process after heat treatment is handled by a partner manufacturer of ITEC. 【Processing Details】 Product Name: Spool (General-purpose part) Material: S48C Lot: 1000 pieces/lot *For more details, please refer to the PDF available for download.
![[Processing Example] Spool 2 (Parts for Construction Machinery)](https://image.mono.ipros.com/public/product/image/08a/2000777927/IPROS88438742331841623414.png?w=280&h=280)
We are processing grinding after hard chrome plating with an external diameter dimension accuracy requirement of 2μ or less!
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.
Introducing hydraulic equipment products! We carry out all processes from lathe machining to polishing in-house.
At Kyoritsu Seisakusho, we manufacture "control valve spools" for medium-sized hydraulic excavators ranging from 7 to 30 tons. We carry out all processes in-house, including lathe machining, M/C machining, thermal deburring, heat treatment, and polishing. Our company adds a process called thermal deburring. We perform deburring both manually and mechanically. Additionally, for some customers, we deliver products that can be assembled directly into control valves after finishing polishing, including the assembly of springs and plugs, allowing us to respond flexibly to customer requests. [Features] ■ Addition of the thermal deburring process ■ Deburring performed both manually and mechanically ■ Flexible response to customer requests *For more details, please refer to the related links or feel free to contact us.
Parts for winding up the power cord of electronic devices.
● By attaching it to the four corners on the back of the case, you can wind up the power cord and other cables. ● It can also be used as rubber feet.
Precision hydraulic components: pistons and spools!
Precision hydraulic components' piston and spool!
Precision hydraulic component rod and spool!
Precision hydraulic components rod and spool!
Precision metal processing, compatible diameters φ3 to φ50.
45 NC lathes (Citizen, Tsugami multi-tasking type, Mori Seiki, Star Micronics)
![[Example of processed products] Spool](https://image.mono.ipros.com/public/product/image/0f1/2000792538/IPROS49802704735855992430.png?w=280&h=280)
Processing with consideration of dimensional changes due to heat treatment! We also accept polishing dimension management!
We would like to introduce the 'spool' used in control valves for hydraulic equipment manufactured by our company. We can accommodate the delivery of finished products that have been processed on NC automatic lathes, heat-treated, and polished. Since the processing is done on Swiss-type composite NC automatic lathes, there is no problem with a total length of 300mm, and we can naturally handle simultaneous processing such as end milling and metal sawing for the land area. 【Processing Overview】 ■ Size: Approximately φ3 to 30, length 20 to 300 ■ Clearance Performance For a clearance indication of 8 to 12μ, we provide a polishing tolerance within 2μ, adjusting the target for polishing and delivery. ■ Notes: To prevent snagging, we buff after polishing (the land area is not chamfered much to maintain the pin angle). *For more details, please refer to the PDF document or feel free to contact us.
Introducing the "spool" used in the control valves of hydraulic equipment manufactured by our company! We can accommodate the delivery of finished products that have been processed with NC automatic lathes, heat treatment, and polishing!
We would like to introduce the 'spool' used in control valves for hydraulic equipment manufactured by our company. We can accommodate the delivery of finished products that have been processed with NC automatic lathes, heat-treated, and polished. Since the processing is done with Swiss-type compound NC automatic lathes, there are no issues with a total length of 300mm, and we can also handle simultaneous machining such as end milling and metal sawing for the land area. 【Processing Overview】 ■ Size: Approximately φ3 to 30, length 20 to 300 ■ Clearance Achievements For a clearance specification of 8 to 12μ, we maintain a polishing tolerance within 2μ, adjusting the target for polishing and delivery. ■ Notes: To prevent snagging, we buff after polishing (the land area is not chamfered much to maintain the pin angle). *For more details, please refer to the PDF document or feel free to contact us.
![[Processing Example] Spool 1 (Parts for Agricultural Machinery)](https://image.mono.ipros.com/public/product/image/c5e/2000777923/IPROS61877329913549113344.png?w=280&h=280)
Managing outer diameter dimensions within ±1 micron! We pursue sub-micron precision to meet various needs.
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.
From cutting and processing to polishing and various treatments (by partner companies), we manage all processes consistently in-house!
At Aisei Industrial Manufacturing, we produce spools used in hydraulic control valves. Using Swiss-type multi-tasking CNC lathes, we process parts with a total length of up to 600mm with high precision. We can also consider dimensional changes due to heat treatment during processing. Additionally, our company can simultaneously perform milling operations such as cross holes, chamfering, and eccentric holes, allowing us to accurately process perpendicularity, parallelism, and phase alignment. Please feel free to contact us when you need our services. [Case Overview] ■ Utilizes Swiss-type multi-tasking CNC lathes ■ High-precision processing of parts up to 600mm in total length ■ Sizes: Diameter 8–20mm, Length 20–600mm *For more details, please refer to the related links or feel free to contact us.
Compatible with existing welding machines.
Compatible with existing welding machines, it achieves stable wire feeding with precise shape. The ability to wind at high speed also improves productivity. It uses non-toxic materials for aligned winding with uniform width, contributing to environmental conservation during product recycling.
