7/16 inch Diameter Grade 100 Hardened AISI 440 Stainless Steel Ball Bearings Simply Bearings Ltd

General Purpose Grade 100 440 Stainless Ball Bearings: High Quality Graded 440 Stainless Steel Ball bearings made from AISI 440 Stainless Steel with a hardness of 57 - 60 HRC Rockwell Scale, the hardness is all the way through the ball. These are the same stainless 440 steel balls used to manufacture bearing assemblies and have a high duty and life cycle.
Martensitic Stainless steel offering high hardness and tensile strength against fresh water, steam, petroleum spirits and alcohols.
Manufactured in compliance to the following international standards: AISI 440 / Wks 1.4125 / DIN X105CrMo17 / AFNOR Z100CD17 / JIS SUS 440

Material	=	440 Stainless Steel
Min Crush Load	=	6140kg
Hardness	=	57-60 HRC
Hardness Depth	=	Through Hardened
Corrosion Resistance	=	Fair
Note	=	Not Drillable
Approx Weight Each	=	5.62g
Attracted to Magnets	=	Yes
Avg Qty / Litre	=	810

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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