Designed to provide maximum absorption in high-impact loading areas, Tru-Trac impact and rubber idlers are reinforced with impact discs press-fitted onto a conventional roller body.

Each rubber disc is positively located with no possibility of movement due to impact loads. Spacers and end-stops are not required.

Key Aspects:

  • Diameters – 127—250mm
  • Roll Lengths – 150—2200mm
  • TIR – Typically less than 1mm at roll ends
  • Bearing Sizes – 6306—6310 (21306, 21307, 21308, 21310)
  • Material Specifications – Abrasion-resistant and fire-retardent rubber

Impact and Rubber Disc Rollers Range
Our product range is not limited to these sizes. Please contact Tru-Trac for more information on our full product range.



Deep groove double sealed or shielded bearings, of tolerance class C3 and C4, are used. This allows for a larger amount of angular misalignment at the bearing when compared with other bearing designs and classes. Heavy duty designs include spherical bearings (21306, 21307, 21308, 21310)

Steel Tube
Only high-quality tube specially manufactured for conveyor idlers is used and conforms to SABS 657/3 (1980).

Steel Shaft
Manufactured from steel which complies with the requirements for grade 070 M20 of BS 970-1. Shaft diameter tolerance adheres to bearing manufacturer standards and ensures a js6 fit. Shaft end slots are machined to customer standards.

Rubber Rings
Moulded rubber rings are manufactured from high-quality abrasive-resistant rubber as standard. Various rubber grades such as fire retardent and acid resistant are available as options (data sheets available on request). Where required, rubber rings utilise internally moulded steel rings in order to positively fix them onto the roller body.

Hollow Shaft
Stepped lightweight hollow steel shafts, equivalent in strength and rigidity to solid shafts, are available on request.

Bearing Housing
Manufactured from deep drawing steel to EN 10111(DD14). Housings are pressed and MIG welded to the inside of the tube. Heavy-duty designs use solid computer numerical controlled (CNC) machined housing.

Corrosion Protection
An external coat of self-etching primer is applied unless otherwise specified.

Circular Movement Tolerance (TIR)
TIR does not exceed 0,5mm measured at a distance of 25mm from the roller end face. Actual TIR values are less and can be verified by referencing historical data.