YDTech® manufacturer of ultrashort columnar rolls for (photoelectric, relay, band)switches! supplier of ultrathin rollers, pins, shafts for guides(chain saws, garden tool, tea picking machine, harvester) in china!

standard sizes: D2*0.9, D3*1.1, D3*1.8, D4*2, D5*0.6, D*1.9, D6.0*3.5, D7.4*1.2, D7.4*1.3, D7.4*1.5, D7.4*2.0, D7.4*2.5, D7.4*3.0, D7.4*3.5 D9.8*1.2, D9.8*1.3, D9.8*1.5, D9.8*2.0, D9.8*2.5, D9.8*3.0, D9.8*3.5, D14.*3.7, D20.*4.3 D0.3*L3.5, D0.7*L3.8, D1*L0.5, D1.47*L4.8, D1*L0.90, D1.5*1.40, D1.5*1.43, D1.5*1.45, D1.5*1.5,D1.6*3.2; 2*L4.3, D2*L4.8, D2.3*L4.6, D2.3*L4.8, D2.5*L4, D2.5*L4.5, D2.5*L4.8, D2.5*L5, D2.5*L5.2, D2.5*L5.8, D2.5*L6.8, D2*1.90, D2*1.93, D2*1.95, D2*2, D2*1.50, D2.05*1.98; D3*L4.7, D3.6*L6.5, D3*2.85, D3*2.90, D*2.93, D3*2.95, D3*3, D3*1.9; D4*3.85, D4*3.90, D4*3.93, D4*3.95, D4*4, D4*2.7; D5*4.8, D5*5, D5*5.5, D5*6, D5.5*6; D6*5.8, D6*5.9, D6*5.93, D*5.95, D6*6, D*4.1.

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: chain saws, saws, saws, saws, saws, picking machine guides, harvester guides, ultra-thin bearings, special bearings, miniature bearings, one-way bearings, special bearings and other occasions. mobile phone gravity sensor, mobile phone direction sensor, displacement sensor, distance sensor, photoelectric switch, relay switch, band switch, car modified valve adjustment

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.