We produce this product overcoming the weak points of aluminum which are "sticky and soft" by using lead-free materials. We ensure completed film thickness of 30? and surface hardness of Hv35 or higher for surface treatment to ensure enough resistance to wear against mating parts. External diameter and straightness/cylindricity have actual value of 2?.

We process this product using six-spindle automatic lathe and pursue a differentiation from competitors by in-house tool layout. We can produce 450 pieces an hour. Furthermore, we remove grinding burrs generated after grinding using barrel machine and applying rustproofing after washing.

Check valve is our main product which allows passage of liquid in one direction and prevents the liquid from passing in the opposite direction. Because the surface roughness is precise, we perform internal diameter machining with NC lathe after spindling on six axes and assure you the roughness. We ship this product after implementing all four-hole processing and milling processing in a dedicated processing line.

This product is an important part that comprises of sleeve section of the A/T solenoid valve. We use chucker NC and machining center, etc., from forging materials of pure iron to finish up internal and external diameters. No processing is implemented after annealing because we do not want products to have magnetic properties as their function. We assure concentricity of internal and external diameters taking into account the dimensional changes of micron mark after processing and in longitudinal direction.

This product is used at hydraulic parts, moves in the axial direction, and comprises of hydraulic parts in the space between sleeves.

This product is contained in internal diameter part of solenoid yoke and slides repeatedly with high frequency. Therefore, we rigorously check for scratches and damages on products, setting the clearance to mating parts at 15?, and external diameter tolerance at 5? for a single unit. Since the product undergoes a final highly thick film plating, very strict requirements are met for each cutting. Furthermore, we pay full attention until the final treatment of products because these products are made of pure iron.

This product plays an important role in changing gears when M/T is in the reverse gear. We improved the process design including physical distribution of this product because it weighs over 600g, the heaviest product among our product line. We have configured our lines by utilizing turning center, machining center, and centerless from forge processing for one-by-one production that saves manpower as much as possible by introducing coupling robots, etc.

There are about 30 different cross holes between ∅2 and ∅4.5. We minimized deburring process as much as possible and achieved cost reduction. This product is press-fitted from external diameter and comprises of oil grooves internally. 。

This product is used in hydraulic shovels and comprises of solenoid operated control valve which is used in hydraulic pressure controller.

Piston slides inside the case where the piston is put in internal diameter to produce damping force. We process this product by deep extrusion using cold forging and perform net shape cutting.