WD Bearing Group

1.Radial Internal Clearance of Cylidrical Bore Bearings
Nominal Bore Diameter d(mm)		Group 2		Basic Group		Group3
Over	Incl.	Min.	Max.	Min.	Max.	Min.	Max.
10	18	3	18	10	25	18	33
18	24	5	20	12	28	20	36
24	30	5	20	12	28	23	41
30	40	6	20	13	33	28	46
40	50	6	23	14	36	30	51
50	65	8	28	18	43	38	61
65	80	10	30	20	51	46	71
80	100	12	36	24	58	53	84
100	120	15	41	28	66	61	97
120	140	18	48	33	81	71	114

3.Cylindrical bore of inner rings tolerances
D(mm)		△dmp		△ds		Kia		△Bs
Over	Incl.	High	Low	High	Low	Max.	High	Low
10	18	+18	0	+22	-4	12	0	-120
18	30	+21	0	+25	-4	15	0	-120
30	50	+25	0	+30	-5	18	0	-120
50	80	+30	0	+36	-6	22	0	-150
80	120	+35	0	+42	-7	28	0	-200
120	180	+40	0	+48	-8	35	0	-250

4.Mounting instructions All TC inner rings with setscrews are specially heat-treated.The race-way is hardende and extended part of setscrew is hardened and extended part of setscrew is well annealled.By this process distortion of the setscrew holes and threads well be avoided.
Setscrew Size		Recommended torque (max)		Proof torque
in	mm	in-lbs	kg-cm	in-lbs	kg-cm
1/4-28	M6x1	44	50	88	100
5/16-24	M8x1	97	110	158	180
3/8-24	M10x1.25	185	210	265	300