YDTech® manufacturer of precision short cylindrical rollers for cross roller bearings and cross roller linear guides; supplier of super ultra thin steel rollers for car seat rails and car seat rail cages in china.

standard sizes: D5*L6.8, D4.5*L6.6, D5*L6.0, D3*L1.8, D5.8*L4.4, D5.9*L4.4, D6.0*L4.4, D6.1*L4.4, D6.2*L4.4, D6.3*L4.4, D6.4*L4.4, D6.5*L4.4, D6.6*L4.4, D8.0*L3.72, D8.3*L4.2, D8.5*L4.3

we always focus on special and customized rollers which are more shorter and smaller. our main products are precision cylindrical rollers and needle rollers. we are especially professional in short cylindrical rollers for chainsaw guide bars, rollers for crossed-roller linear guide rails and crossed-roller bearings, we also make rollers for oil pumps, fishing tackle bearings, one-way bearings，air cylinders and some other use. our products are sold to USA, canada and germany.

material: GCr15,52100,100Cr6, 35CRMOV, SS440C, 420C,42CRMO,304.

hardness: HRC58-65

diameter tolerance: 0.005mm, 0.003mm, 0.002mm, 0.001mm, 0.0005mm

length tolerance:+/-0.05,+/-0.03, +0/-0.015,+/-0.01, +0/-0.005

chamfer:R0.03-R0.3mm or customize

parallelism:0.01mm, 0.005mm. perpendicularity:0.01mm, 0.005mm. face runout:0.01mm, 0.005mm. circularity:0.001mm, 0.0005mm. cylindricity:0.001mm, 0.0005mm roughness:Ra0.08um, Ra0.04um.

application: car seat rails, engineering vehicle rails. car seat recorder of BMW, Mercedes-Benz, Volkswagen, General Motors, etc

we are professional manufacture of bearing rollers and cylindrical needle rollers. we produce rollers of diameter 0.5 mm to 60 mm. the rollers could satisfy the request of DIN 5402 G2 rollers.