Page 185 - needle bearings

Inner rings
NTN

d 45ʙ55mm

Boundary dimensions Bearing numbers Abutment Mass
dimensions
mm mm kg
da ras
d F 1) B rs min 2) t min max (approx.)
50 25.5 0.3 ʵ ˞ IR45ʷʷ50ʷʷ25.5 47 0.3 0.074
50 0 32 0.6 ʵ ˞ IR45ʷʷ50ʷʷ32 49 0.6 0.092
ʵ0.011
50 35 0.6 2 IR45ʷʷ50ʷʷ35 49 0.6 0.101
50 40 0.3 1.5 IR45ʷʷ50ʷʷ40 47 0.3 0.115
52 22 0.6 2 IR45ʷʷ52ʷʷ22 49 0.6 0.088
45 52 23 0.6 ʵ ˞ IR45ʷʷ52ʷʷ23D 49 0.6 0.093
52 30 0.6 2 IR45ʷʷ52ʷʷ30 49 0.6 0.123
ʴ0.008
52 ʵ0.004 40 0.6 2 IR45ʷʷ52ʷʷ40 49 0.6 0.164
55 20 0.6 2 IR45ʷʷ55ʷʷ20 49 0.6 0.116
55 22 1 2 IR45ʷʷ55ʷʷ22 50 1 0.130
55 40 0.6 2 IR45ʷʷ55ʷʷ40 49 0.6 0.173
55 20 0.6 2 IR50ʷʷ55ʷʷ20 54 0.6 0.063
55 25 0.6 2 IR50ʷʷ55ʷʷ25 54 0.6 0.078
55 35 0.6 2 IR50ʷʷ55ʷʷ35 54 0.6 0.112
55 40 0.6 2 IR50ʷʷ55ʷʷ40 54 0.6 0.128
58 22 0.6 2 IR50ʷʷ58ʷʷ22 54 0.6 0.113
58 ʴ0.008 23 0.6 ʵ ˞ IR50ʷʷ58ʷʷ23D 54 0.6 0.119
50 ʵ0.004
58 30 0.6 2 IR50ʷʷ58ʷʷ30 54 0.6 0.159
58 40 0.6 2 IR50ʷʷ58ʷʷ40 54 0.6 0.209
60 20 1 2 IR50ʷʷ60ʷʷ20 55 1 0.129
60 25 1 2 IR50ʷʷ60ʷʷ25 55 1 0.163
60 28 1.1 2 IR50ʷʷ60ʷʷ28 56.5 1 0.183
60 40 1 2 IR50ʷʷ60ʷʷ40 55 1 0.262
60 25 0.6 2.2 IR55ʷʷ60ʷʷ25 59 0.6 0.086
60 35 0.6 2 IR55ʷʷ60ʷʷ35 59 0.6 0.121
63 25 1 2 IR55ʷʷ63ʷʷ25 60 1 0.141
63 0 34 1 2.2 IR55ʷʷ63ʷʷ34 60 1 0.192
55 ʵ0.013
63 45 1 2.2 IR55ʷʷ63ʷʷ45 60 1 0.256
65 28 1.1 2.2 IR55ʷʷ65ʷʷ28 61.5 1 0.206
65 30 1 2.2 IR55ʷʷ65ʷʷ30 60 1 0.220
65 60 1 1.5 IR55ʷʷ65ʷʷ60 60 1 0.440

Note 1) Dimensional tolerance to secure ordinary clearance when any of these inner rings is combined with needle roller bearing with no inner ring.
2) Allowable minimum chamfer dimension r .
Remarks: 1. Nominal number plus code "D" represents inner ring with oil hole.
2. Nominal number plus ˞-mark represents inner ring with fine-chamfered outer surface.
B-123