40x52x7 mm High precision bearings 61808 6808 zz 2rs bicycle wheel ball bearing 1. Product range of use:
1) These bearing are widely used in automobile, electrical. (Home appliances, electric tools, fitness equipment, motors, medical devices, motorbikes, textile machines)
2) equipment, instrument, building machinery, rolling stock agricultural machinery and various specialized machineries.
2. About bearings :
1) Types: 618 series , 619 series ,60 series, 62 series, 63 series, 64 series.
2) Corresponding models range :605-6020 ,623-6220 ,6300-6320 ,6403-6413
3) Material: Gcr15 (Chrome steel) -China, (AISI) 52100-American, (Din) 100Cr6 -Germany, carbon steel, iron.
4) Shield / Closure: Plain (Open), Z, ZZ, RS, 2RS, 2ZR, 2Z.
5) Vibration and Noisy level: Z1, Z2, Z3, ZV1, ZV2.ZV3.Z1V1.Z2V2.Z3V3.
6) Precision level: ABEC-1, ABEC-3, ABEC-5, ABEC-7.