1. Bearing Material
High carbon chrome bearing steel(Gcr15) is the standard material for bearing ring & rolling elements, also carbon steel & stainless steel will be used upon request. The cages are pressed steel ribbon cages & pressed steel snap cages. For extra-high speed application, synthetic-resin, stainless steel, nylons(Phenolic resins) will be used upon request.
2. Lubrication
Different types of greases can be supplied for shielded & sealed bearings and oil for open bearings
3. Tolerance
YUTONG Bearings can meet tolerance grades from ABEC-1 to ABEC-3 as requested dimension tolerance & runout accurancy.
NOTE
C2 Group clearance only for bearings over ABEC-3 accurancy.
4. Vibration and Noise
The vibration and noise of bearing in four classes Z1, Z2, Z3 and Z4, It is measured by the instrument of S09-1, For special requirement, it is measured by BVT-1 and classified as V1, V2, and V3, The date are shown tables, different vibration & noise requirement should be menrioned in order.

Specification
The detailed specification is as follows:

Boundary dimensions(mm)				Basic load ratings(kN)		Limiting speeds(rpm)		Mass(Kg)	Bearing Number
d	D	B	rs min	Cr	Cor	Grease	Oil	(Approx.)	YUTONG
10	22	6	0.3	2.7	1.27	30,000	36,000	0.009	6900
12	24	6	0.3	2.89	1.46	27,000	32,000	0.011	6901
15	28	7	0.3	3.65	2	24,000	28,000	0.016	6902
17	30	7	0.3	4.65	2.58	22,000	26,000	0.018	6903
20	37	9	0.3	6.4	3.7	19,000	23,000	0.036	6904
25	42	9	0.3	7.05	4.55	16,000	19,000	0.042	6905
30	47	9	0.3	7.25	5	14,000	17,000	0.048	6906
35	55	10	0.6	9.55	6.85	12,000	15,000	0.074	6907
40	62	12	0.6	12.2	8.9	11,000	13,000	0.11	6908
45	68	12	0.6	13.1	10.4	9,800	12,000	0.128	6909
50	72	12	0.6	13.4	11.2	8,900	11,000	0.132	6910
55	80	13	1	16	13.3	8,200	9,600	0.18	6911
60	85	13	1	16.4	14.3	7,600	8,900	0.193	6912
65	90	13	1	17.4	16.1	7,000	8,200	0.206	6913