Page 186 - needle bearings

Inner rings
NTN

Type IR

d 60ʙ75mm

Boundary dimensions Bearing numbers Abutment Mass
dimensions
mm mm kg
da ras
d F 1) B rs min 2) t min max (approx.)
68 25 1 2.2 IR60ʷʷ68ʷʷ25 65 1 0.152
68 34 1 2.2 IR60ʷʷ68ʷʷ34 65 1 0.206
68 35 0.6 2.2 IR60ʷʷ68ʷʷ35 64 0.6 0.213
68 0 45 1 2.2 IR60ʷʷ68ʷʷ45 65 1 0.270
60 ʵ0.013
70 25 1 2.2 IR60ʷʷ70ʷʷ25 65 1 0.195
70 28 1.1 2.2 IR60ʷʷ70ʷʷ28 66.5 1 0.216
70 30 1 2.2 IR60ʷʷ70ʷʷ30 65 1 0.232
70 60 1 2.2 IR60ʷʷ70ʷʷ60 65 1 0.463
72 25 1 2.2 IR65ʷʷ72ʷʷ25 70 1 0.142
72 34 1 2.2 IR65ʷʷ72ʷʷ34 70 1 0.193
72 45 1 2.2 IR65ʷʷ72ʷʷ45 70 1 0.259
73 0 25 0.6 2.2 IR65ʷʷ73ʷʷ25 69 0.6 0.164
65 ʵ0.013
73 35 0.6 2.2 IR65ʷʷ73ʷʷ35 69 0.6 0.232
75 28 1.1 2.2 IR65ʷʷ75ʷʷ28 71.5 1 0.240
75 30 1 2.2 IR65ʷʷ75ʷʷ30 70 1 0.256
75 60 1 2.2 IR65ʷʷ75ʷʷ60 70 1 0.513

80 25 1 2.2 IR70ʷʷ80ʷʷ25 75 1 0.224
80 28 1.1 2.2 IR70ʷʷ80ʷʷ28 76.5 1 0.250
80 30 1 2.2 IR70ʷʷ80ʷʷ30 75 1 0.267
80 0 35 1 2.2 IR70ʷʷ80ʷʷ35 75 1 0.313
70 ʵ0.013
80 40 1 2.2 IR70ʷʷ80ʷʷ40 75 1 0.358
80 54 1 2.2 IR70ʷʷ80ʷʷ54 75 1 0.483
80 56 1 2.2 IR70ʷʷ80ʷʷ56 75 1 0.502
80 60 1 2.2 IR70ʷʷ80ʷʷ60 75 1 0.540

85 25 1 2.2 IR75ʷʷ85ʷʷ25 80 1 0.238
85 30 1 2.2 IR75ʷʷ85ʷʷ30 80 1 0.287
85 0 35 1 2.2 IR75ʷʷ85ʷʷ35 80 1 0.336
75 ʵ0.015
85 40 1 2.2 IR75ʷʷ85ʷʷ40 80 1 0.385
85 54 1 2.2 IR75ʷʷ85ʷʷ54 80 1 0.515
90 32 1.1 2.2 IR75ʷʷ90ʷʷ32 81.5 1 0.480

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 .
B-124