PWKR cam follower


Track rollers - PWKR cam follower

Technical Drawing and Exploded View - PWKR cam follower

C.R. Special Profile


1. Zrs seal ring
2. Support thrust ring
3. Pivot
4. Outer ring
5. Cylindrical rollers
6. Zrs seal ring


Technical Data - PWKR cam follower

CR rif/ref D (mm) d(h7) (mm) c (mm) rmin (mm) B (mm) B1 (mm) B2 (mm) G (mm) g (mm) M (mm) C1 (mm) d2 (mm) CH (mm) Cw (KN) Cow (KN) Vel Max Speed RPM min-1 Coppia serr. Dado / Nut locking couple (Nm) Cm3
PWKR 35 2RS 35 16 18 0,6 52 32,5 7,8 M16x1,5 17 3 0,8 20 8 11,6 11,3 6000 58
PWKR 40 2RS 40 18 20 1 58 36,5 8 M18x1,5 19 3 0,8 22 8 13,2 13,8 5000 87
PWKR 47 2RS 47 20 24 1 66 40,5 9 M20x1,5 21 4 0,8 27 10 23,2 25,5 3800 120
PWKR 52 2RS 52 20 24 1 66 40,5 9 M20x1,5 21 4 0,8 31 10 24,2 28 3800 120
PWKR 62 2RS 62 24 28 1 80 49,5 11 M24x1,5 25 4 1,3 38 14 35 39,5 2200 220
PWKR 72 2RS 72 24 28 1,1 80 49,5 11 M24x1,5 25 4 1,3 44 14 38,5 46,5 2200 220
PWKR 80 2RS 80 30 35 1,1 100 63 15 M30x1,5 32 4 1 47 14 56 70 1800 450
PWKR 90 2RS 90 30 35 1,1 100 63 15 M30x1,5 32 4 1 47 14 63 82 1800 450

Pressure greaser
NIP A2x7,5: PWKR 35 2RS - PWKR 40 2RS - PWKR 47 2RS - PWKR 52 2RS
NIP A3x9,5: PWKR 62 2RS - PWKR 72 2RS - PWKR 80 2RS - PWKR 90 2RS

Adaptor for central lubrication
AP8: PWKR 35 2RS - PWKR 40 2RS
AP10: PWKR 47 2RS - PWKR 52 2RS
AP14: PWKR 62 2RS - PWKR 72 2RS - PWKR 80 2RS - PWKR 90 2RS

Cw: Dynamic load  -  Cow: Static load

Technical Characteristics - PWKR cam follower

The main characteristic of this series of rollers is the high thickness of the outer ring, which is suitable to bear specific high pressures and the impacts that characterize the use of these bearings (ex. cam followers).

It differs from NUKR series as far as the characteristics of the seals are concerned, as they are of ZRS type (steel and rubber). Furthermore, a chamber for the lubrication grease is foreseen between the rolling raceways of the outer ring.

Other important features of these bearings are:
  • Outer ring with double border of the rollers obtained entirely and accurately grinded to allow the roller to bear loads with axial components. The ring is usually cambered on the outer part, in order to improve working condition with heavy loads and to prevent the concentration of load onto side bands of the raceway. On request, C.R. can supply rollers with cylindrical outer surface.
  • Pivot with threaded shank, one guide border of rollers obtained entirely and tempered rolling raceway. On the front part, a seat for hexagon wrench or for corkscrew (on request) are foreseen.
  • The ZRS seals forced on the outer ring guarantee an extremely efficient protection system.
  • Full complement of grinded flat head cylindrical rollers.
  • Lubrication channels and holes in the pivot.
  • Tolerance of execution according to normal class, possibility of special execution according to class P5 (DIN 620).