Bearings

Technical Specification

Converson and Grade Cart

Diameter		Grade	Balls/Kg	Diameter		Grade	Balls/Kg
mm	inch	Grade	Balls/Kg	mm	inch	Grade	Balls/Kg
3.969	5/32	G5~G1000	3899	13	/	G5~G1000	110.9
4.762	3/16	G5~G1000	2257	13.494	17/32	G5~G1000	99.2
5	/	G5~G1000	1950	14.288	9/16	G5~G1000	83.6
5.556	7/32	G5~G1000	1421	15.081	19/32	G5~G1000	71.1
5.953	15/64	G5~G1000	1155	15.875	5/8	G5~G1000	60.9
6	/	G5~G1000	1128	16.669	21/32	G5~G1000	52.6
6.35	¼	G5~G1000	952.0	17.462	11/16	G5~G1000	45.8
6.747	17/64	G5~G1000	793.6	17.7	/	G5~G1000	44.0
7.144	9/32	G5~G1000	668.5	18.256	23/32	G5~G1000	40.1
7.938	5/16	G5~G1000	487.3	19.05	3/4	G5~G1000	35.3
8.731	11/32	G5~G1000	366.2	19.844	25/32	G5~G1000	31.2
9	/	G5~G1000	334.4	20	/	G5~G1000	30.5
9.525	3/8	G5~G1000	282.1	20.638	13/16	G5~G1000	27.7
10	/	G5~G1000	243.8	21	/	G5~G1000	26.3
10.319	13/32	G5~G1000	221.8	21.431	27/32	G5~G1000	24.8
10.5	/	G5~G1000	210.6	22.225	7/8	G5~G1000	22.2
11.112	7/16	G5~G1000	177.7	23.019	29/32	G5~G1000	20.0
11.43	0.450	G5~G1000	163.2	23.812	15/16	G5~G1000	18.1
11.5	/	G5~G1000	160.3	24.604	31/32	G5~G1000	16.4
11.906	15/32	G5~G1000	144.4	25.4	1	G5~G1000	14.8
12.303	31/64	G5~G1000	130.9	26.194	1 1/32	G5~G1000	13.6
12.7	½	G5~G1000	119.0	26.988	1 1/16	G5~G1000	12.4
27.5	1 1/12	G5~G1000	11.7	41.275	1 5/8	G16~G1000	3.47
28.575	1 1/8	G10~G1000	10.4	42.863	1 11/16	G20~G1000	3.10
30.162	1 3/16	G10~G1000	8.88	43.656	1 23/32	G20~G1000	2.93
31.75	1 1/4	G16~G1000	7.62	44.45	1 3/4	G20~G1000	2.78
33.338	1 5/16	G16~G1000	6.58	47.625	1 7/8	G24~G1000	2.26
34.925	1 3/8	G16~G1000	5.72	50.8	2	G24~G1000	1.86
36.512	1 7/16	G16~G1000	5.01	53.975	2 1/8	G24~G1000	1.55
37.98	/	G16~G1000	4.45	60.325	2 3/8	G24~G1000	1.11
38.1	1 1/2	G16~G1000	4.41	63.5	2 1/2	G24~G1000	0.95
39.688	1 9/16	G16~G1000	3.90	/	/	/	/
40	/	G16~G1000	3.81	/	/	/	/

A.F.B.M.A. STANDARDS (U.S.A.)

AFBMA GRADES	Variation of ball diameter /ROUNDNESS		LOT DIAMETER VARIATION		BASIC DIAMETER TOLERANCE		MAXIMUM INCREMENTS		SURFACE ROUGHNESS
AFBMA GRADES	INCHES	µm	INCHES	µm	INCHES	µm	INCHES	µm	INCHES	µm
3	0.000003	0.0762	0.000005	0.127	± 0.00003	0.762	0.000010	0.254	0.0000005	0.0127
5	0.000005	0.127	0.000010	0.254	± 0.00005	1.27	0.000010	0.254	0.0000008	0.02032
10	0.000010	0.254	0.000020	0.508	± 0.00010	2.54	0.000010	0.254	0.000001	0.0254
15	0.000015	0.381	0.000030	0.762	± 0.00010	2.54	0.000010	0.254	0.000001	0.0254
16	0.000016	0.4064	0.000032	0.8128	± 0.00010	2.54	0.000010	0.254	0.000001	0.0254
24	0.000024	0.6096	0.000048	1.2192	± 0.00010	2.54	0.000010	0.254	0.000002	0.0508
25	0.000025	0.635	0.000050	1.27	± 0.00010	2.54	0.000010	0.254	0.000002	0.0508
48	0.000048	1.2192	0.000096	2.4384	± 0.00020	5.08	0.000050	1.27	0.000003	0.0762
50	0.000050	1.27	0.000100	2.54	± 0.00030	7.62	0.000050	1.27	0.000003	0.0762
100	0.000100	2.54	0.000200	5.08	± 0.00050	12.70	0.000100	2.54	0.000005	0.127
200	0.000200	5.08	0.000400	10.20	± 0.00100	25.40	0.000200	5.08	0.000008	0.2032
300	0.000300	7.62	0.000400	15.24	± 0.00100	25.40	0.000300	7.62	-	-
500	0.000500	12.70	0.001000	25.40	± 0.00200	50.80	0.000500	12.70	-	-
1000	0.001000	25.40	0.002000	50.80	± 0.00500	127.0	0.001000	25.40	-	-
2000	0.002000	50.80	0.004000	101.60	± 0.00500	127.0	0.002000	50.80	-	-
3000	0.003000	76.20	0.006000	152.40	± 0.00500	127.0	0.003000	76.20	-	-