Page 181 - needle bearings

Inner rings
NTN

d 15ʙ20mm

Boundary dimensions Bearing numbers Abutment Mass
dimensions
mm mm kg
da ras
d F 1) B rs min 2) t min max (approx.)
20 23 0.3 ʵ ˞ IR15ʷʷ20ʷʷ23 17 0.3 0.024
20 0 26 0.3 1.5 IR15ʷʷ20ʷʷ26 17 0.3 0.027
15 ʵ0.009
20 30.5 0.3 1.5 IR15ʷʷ20ʷʷ30.5 17 0.3 0.032
22 20 0.6 1.5 IR15ʷʷ22ʷʷ20 19 0.6 0.032

20 16 0.3 1.5 IR17ʷʷ20ʷʷ16 19 0.3 0.011
20 16.5 0.3 1.5 IR17ʷʷ20ʷʷ16.5 19 0.3 0.011
20 20 0.3 1.5 IR17ʷʷ20ʷʷ20 19 0.3 0.014
20 20.5 0.3 ʵ ˞ IR17ʷʷ20ʷʷ20.5 19 0.3 0.014
20 30.5 0.3 ʵ ˞ IR17ʷʷ20ʷʷ30.5 19 0.3 0.021
21 16 0.3 1.5 IR17ʷʷ21ʷʷ16 19 0.3 0.014
21 20 0.3 ʵ ˞ IR17ʷʷ21ʷʷ20 19 0.3 0.018
22 0 13 0.3 1.5 IR17ʷʷ22ʷʷ13 19 0.3 0.015
17 ʵ0.009
22 14 0.3 ʵ ˞ IR17ʷʷ22ʷʷ14D 19 0.3 0.016
22 16 0.3 ʵ ˞ IR17ʷʷ22ʷʷ16 19 0.3 0.019
22 18 0.3 1.5 IR17ʷʷ22ʷʷ18 19 0.3 0.021
22 20.5 0.3 1.5 IR17ʷʷ22ʷʷ20.5 19 0.3 0.024
22 23 0.3 ʵ ˞ IR17ʷʷ22ʷʷ23 19 0.3 0.027
22 26 0.3 1.5 IR17ʷʷ22ʷʷ26 19 0.3 0.030
22 32 0.3 1.5 IR17ʷʷ22ʷʷ32 19 0.3 0.036
24 20 0.6 1.5 IR17ʷʷ24ʷʷ20 21 0.6 0.034
24 16 0.3 1.8 IR20ʷʷ24ʷʷ16 22 0.3 0.017
24 20 0.3 ʵ ˞ IR20ʷʷ24ʷʷ20 22 0.3 0.021
24 28.5 0.3 ʵ ˞ IR20ʷʷ24ʷʷ28.5 22 0.3 0.030
25 12.5 0.3 1.8 IR20ʷʷ25ʷʷ12.5 22 0.3 0.016
25 16 0.3 ʵ ˞ IR20ʷʷ25ʷʷ16 22 0.3 0.021
0
20 25 ʵ0.009 16.5 0.3 1.8 IR20ʷʷ25ʷʷ16.5 22 0.3 0.022
25 17 0.3 1.8 IR20ʷʷ25ʷʷ17 22 0.3 0.022
25 18 0.3 ʵ ˞ IR20ʷʷ25ʷʷ18D 22 0.3 0.024
25 20 0.3 ʵ ˞ IR20ʷʷ25ʷʷ20 22 0.3 0.027
25 20.5 0.3 1.8 IR20ʷʷ25ʷʷ20.5 22 0.3 0.028
25 23 0.3 1.8 IR20ʷʷ25ʷʷ23 22 0.3 0.031

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-119