The dimensional and geometrical tolerances correspond to tolerance class PN to DIN 620, for KR(E) and KRV to ISO 7 063.The following deviations from DIN 620 apply:
- the diameter tolerance of the profiled outside surface 0/–0,05 mm
- for NNTR, the diameter tolerance to h10
- for NATR, NATV, NUTR, PWTR..-2RS, the tolerance of the width B to h12
- for NATR, NATV, the roundness of the inner ring
- for INA stud type track rollers, the tolerance of the shank diameter h7 and the eccentric collar diameter h9.
For PWTR..-2RS-RR and PWKR..-2RS-RR , the tolerances are increased by the thickness of the Corrotect special coating.
INA stud type track rollers radial internal clearance
The radial internal bearing clearance corresponds approximately to class C2 and in the case of STO and NA22..-2RSR to class CN in accordance with DIN 620-4.
| Bore | Radial internal clearance | ||||||||
| d mm | C2 μm | CN μm | C3 μm | C4 μm | |||||
| over | incl. | min. | max. | min. | max. | min. | max. | min. | max. |
| - | 24 | 0 | 25 | 20 | 45 | 35 | 60 | 50 | 75 |
| 24 | 30 | 0 | 25 | 20 | 45 | 35 | 60 | 50 | 75 |
| 30 | 40 | 5 | 30 | 25 | 50 | 45 | 70 | 60 | 85 |
| 40 | 50 | 5 | 35 | 30 | 60 | 50 | 80 | 70 | 100 |
| 50 | 65 | 10 | 40 | 40 | 70 | 60 | 90 | 80 | 110 |
| 65 | 80 | 10 | 45 | 40 | 75 | 65 | 100 | 90 | 125 |
| 80 | 100 | 15 | 50 | 50 | 85 | 75 | 110 | 105 | 140 |
| 100 | 120 | 15 | 55 | 50 | 90 | 85 | 125 | 125 | 165 |
| 120 | 140 | 15 | 60 | 60 | 105 | 100 | 145 | 145 | 190 |
Enveloping circle
For RSTO and RNA22..-2RSR, the needle roller enveloping circle Fw is in the tolerance zone F6.
The enveloping circle is the inner inscribed circle of the needle rollers in clearance-free contact with the adjacent construction.
