Grade	Size Range	Deviation from Spherical Form	Lot Diameter Variation	Allowable Ball Gage Variation	Nominal Ball Diameter Tolerance	Marking Increments	Maximum Surface Roughness in Micro-Inches"Ra"
3	0.006-1/2	0.000003	+/-0.00000	+/-0.00003	-	0.000010	0.5
5	0.006-1/2	0.000005	+/-0.00000	+/-0.00005	-	0.000010	0.8
10	0.006-7/8	0.000010	+/-0.000010	+/-0.00005	-	0.000010	1.0
25	0.006-1	0.000025	+/-0.000025	+/-0.00010	-	0.000010	2.0
50	0.006-1	0.000050	+/-0.000050	-	+/-0.0002	0.000050	3.0
100	0.006-1	0.000100	+/-0.000100	-	+/-0.0005	-	5.0
200	0.006-1	0.000200	+/-0.000200	-	+/-0.0010	-	8.0
1000	0.006-1	0.001000	+/-0.001000	-	+/-0.0050	-	-