31/64 inch Diameter Grade 100 Hardened 52100 Chrome Steel Ball Bearings Simply Bearings Ltd

Industry Standard Grade 100 Hardened Steel Ball Bearings: High Quality Graded Hardened Chrome Steel Ball bearings made from Chromium AISI 52100 steel. Hardened to 60-67 Rockwell Scale equivalent to 700-900 HV (Vickers Scale) and are hardened all the way through the ball. These are the same hardened steel balls used to manufacture bearing assemblies and have a high duty and life cycle.
Manufactured in compliance to the following international standards: AISI52100 / EN31 / BS534A99 / W1.3505 / BS535A99 / UNI100C6 / AFN100C6 / DIN100C6 / JIS G4805 SUJ2

Material	=	AISI 52100 Chrome Steel
Min Crush Load	=	7350kg
Hardness	=	60-67 HRC
Hardness Depth	=	Through Hardened
Corrosion Resistance	=	Keep Oiled
Note	=	Not Drillable
Approx Weight Each	=	7.60g
Attracted to Magnets	=	Yes
Avg Qty / Litre	=	610

GRADES
Grade	Diameter Tolerance Per Ball		Sphericity		Diameter Tolerance per Unit Container		Diameter Tolerance		Max Surface Roughness
-	Inch	µ	Inch	µ	Inch	µ	Inch	µ	Inch	µ
3	0.000003	0.076	0.000003	0.076	0.000005	0.127	±.00003	±0.076	0.5	0.013
5	0.000005	0.127	0.000005	0.127	0.000001	0.25	±.000005	±0.127	0.8	0.02
10	0.00001	0.25	0.00001	0.25	0.00002	0.51	±.0001	±2.5	1	0.025
15	0.000015	0.38	0.000015	0.38	0.00003	0.76	±.0001	±2.5	1.2	0.03
25	0.000025	0.63	0.000025	0.63	0.00005	1.27	±.0001	±2.5	1.5	0.038
50	0.00005	1.27	0.00005	1.27	0.0001	2.5	±.0002	±5	3	0.075
100	0.0001	2.5	0.0001	2.5	0.0002	5	±.0005	±5	5	0.125
200	0.0002	5	0.0002	5	0.0004	10	±.0010	±10	8	0.2
300	0.0003	7.5	0.0003	7.5	0.0006	15	±.0015	±37.5	Not applicable	Not applicable
500	0.0005	12.5	0.0005	12.5	0.001	25	±.002	±50	Not applicable	Not applicable
1000	0.001	25	0.001	25	0.002	50	±.005	±125	Not applicable	Not applicable
2000	0.002	50	0.002	50	0.004	100	±.005	±125	Not applicable	Not applicable

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