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Series And Varients Of THB Support Roller Bearings
Types of THB Yoke Type Track Rollers
THB can provide you with the following types of supported roller bearings: RSTO/STO/RNA/NA/NATR/NATV/NUTR/PWTR/NNTR.
If you need customized products, you can also contact THB.
Size Range of THB Yoke Type Track Rollers
The size range of NATR/NATV: inner diameter 5-50mm, outer diameter 16-90mm, width 12-32mm
The size range of NUTR/PWTR: inner diameter 15-50mm, outer diameter 35-110mm, width 19-32mm
The size range of NNTR: inner diameter 50-130mm, 130-310mm, 65-146mm
Technical Information of THB Support Roller Bearings
Working temperature
support roller can operate at temperatures of -30 °C to +140 °C. For the bearings with seals (suffix 2RS and 2RSR) and nylon retainers (suffix TV), the working temperature is within -30°C to +120 °C. Due to restrictions on the selected grease and seal materials, NATR... -PP and NATV... -PP is suitable for use under the working temperature of -30 °C to +100 °C.
If you need special products beyond the standard working temperature, please contact THB technical department.
Sealing
Among the Yoke Type Track Rollers, except for the STO series in open structure without sealing, the other series have different sealing structures depending on the product series. See the parameter sheet for the sealing types.
| 2RS | Lip seal on both sides of the yoke type track roller. |
| 2Z | Metal shield on both sides of the track roller bearing. |
| 2RSR | Radical contact lip seal on both sides of the yoke type track roller bearing. |
| 2ZL | Sealing shield with lamellar rings on both sides of the track roller bearing. |
Lubrication
Prior to delivery, the yoke type track rollers have been filled with lithium-based grease so that they can be re-lubricated through the inner ring or using equivalent grease.
For special lubrication materials, please contact THB technical department.
High radial load: The thicker wall thickness outer ring can not only bear high radial load, but also reduce deformation and bending stress when working as a roller.
Can withstand axial load: Cylindrical roller bolt shaft rollers with baffle type can withstand axial load that may result from off-loading or inclined operation.
Long service life: The convex design of the outer ring surface can be greatly improved to cope with the possible inclination of the outer ring with respect to the working track surface, or where the edge stress needs to be minimized.
