Page 606 - Rollingbearings

7 Needle roller bearings
Table 12 Table 13
Inner ring raceway tolerances ISO tolerance classes for LR series inner rings
Nominal diameter F t ΔFmp Nominal h6� h12� K6�
for CN and EGS diameter
> ≤ > ≤ U L > ≤ U L U L U L
mm μm μm μm
mm mm μm
6 10 0 –9 – – +2 –7
– 3 3 6 −10 −27 10 18 0 –11 0 –180 +2 –9
3 6 6 10 −7 −23 18 30 0 –13 0 –210 +2 –11
6 10 6 10 −7 −23
30 50 0 –16 0 –250 +3 –13
6 18 10 18 −4 −18 50 80 0 –19 – – – –
10 24 18 30 0 −12
18 24 30 50 5 −4
24 30 24 30 0 −12
24 30 30 50 5 −4
30 40 30 50 0 −9
40 50 40 50 −5 −19
40 50 50 80 0 −11
50 65 50 80 −10 −21
Table 14
65 80 65 80 −10 −26
65 80 80 120 −4 −17 Dimensional and geometrical tolerances of SKF needle rollers,
80 100 80 120 −14 −27 grade G2
100 120 100 120 −14 −32 Length L
100 120 120 180 −7 −22 Diameter D w Gauge Gauge Roundness Tolerance w
Deviation
120 140 120 180 −17 −37 toler- limits (max circularity devi- class
ance ation in accordance
140 160 140 180 −27 −52 with ISO 3096)
160 180 160 180 −32 −57 U L
7 160 180 180 250 −25 −46
180 200 180 250 −40 −66 µm –
200 225 200 250 −55 −86
225 250 250 315 −54 −87 0 –10 2 0/–2 1 h13�
–1/–3
250 280 250 315 −69 −107 –2/–4
280 315 315 400 −68 −107 –3/–5
315 335 315 400 −83 −127 –4/–6
–5/–7
355 400 355 400 −128 −182 –6/–8
355 400 400 500 −122 −172 –7/–9
–8/–10

Preferred diameter deviations range from 0 to –7 μm.
Each gauge is packed separately and marked with the gauge limits, e.g. N/M2 or M2/M4, where
M signiies minus and N zero For a needle roller with a 2 mm nominal diameter and gauge limits
M2/M4, the actual diameter is between 1,998 mm and 1,996 mm

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