Pwtr track roller


Track rollers - PWTR track roller

Technical Drawing and Exploded View  - PWTR track roller


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


Technical Data - PWTR track roller

C.R. rif / ref d (mm) D (mm) B (mm) C (mm) d1 (mm) r min. (mm) r1 min. (mm) Cw (KW) Cow (KW) Vel Max Speed (RPM min-1)
PWTR 15 2RS 15 35 19 18 20 0,6 0,3 11,6 11,3 6000
PWTR 17 2RS 17 40 21 20 22 1 0,5 13,2 13,8 5000
PWTR 15 42 2RS 15 42 19 18 20 0,6 0,3 13,5 14,1 6000
PWTR 17 47 2RS 17 47 21 20 22 1 0,5 14,8 16,4 5000
PWTR 20 2RS 20 47 25 24 27 1 0,5 23,2 25,5 3800
PWTR 20 52 2RS 20 52 25 24 27 1 0,5 25,5 29,5 3800
PWTR 25 2RS 25 52 25 24 31 1 0,5 24,2 28 3800
PWTR 25 62 2RS 25 62 25 24 31 1 0,5 29 36 3800
PWTR 30 2RS 30 62 29 28 38 1 0,5 35 39,5 2200
PWTR 30 72 2RS 30 72 29 28 38 1 0,5 41 49 2200
PWTR 35 2RS 35 72 29 28 44 1,1 0,6 38,5 46,5 1800
PWTR 35 80 2RS 35 80 29 28 44 1,1 0,6 43,5 55 1800
PWTR 40 2RS 40 80 32 30 51 1,1 0,6 44,5 53 1500
PWTR 45 2RS 45 85 32 30 55 1,1 0,6 45 55 1300
PWTR 40 90 2RS 40 90 32 30 51 1,1 0,6 52 66 1500
PWTR 50 2RS 50 90 32 30 60 1,1 0,6 45,5 57 1100
PWTR 45 100 2RS 45 100 32 30 55 1,1 0,6 56 74 1300
PWTR 50 110 2RS 50 110 32 30 60 1,1 0,6 59 82 1100

Cw: Dynamic load  -  Cow: Static load

Technical Characteristics - PWTR track roller

The main characteristic of this series of rollers is the high thickness of outer ring, which is suitable to bear high specific pressures and the impacts deriving form the use of these bearings as pressure rollers, cam followers, conveyor belt rollers, bearings for fork lift masts.

It differs from NUTR series as far as the characteristics of the seals are concerned, as they are of ZRS type (steel and rubber).

Other important features of these bearings are:
  • Outer ring with double border of rollers obtained entirely on the outer ring and accurately grinded in order  to allow the roller to bear loads with axial components. Usually, the ring is 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, rollers with cylindrical outer surface can be supplied.
  • Inner ring with holes and channels for the inflow of lubricants.
  • Grinded thrust rings which, along with ZRS seals forced on the outer ring, guarantee an extremely efficient protection system. One of lateral thrust rings can be a closed thrust ring, to allow the fixing of the rollers at the edge of the shaft.
  • Full-complement of grinded flat head cylindrical rollers.
  • Tolerance of execution according to normal class, possibility of special execution according to class P5 (DIN 620).