Steel Rollers with Composite Housing
Suitable for highly corrosive environments, these rollers provide a cost-effective alternative to full-steel rollers.
Key Aspects
- Diameters – 127—178mm
- Roll Lengths – 150—3000mm
- TIR – Typically less than 0.5mm at roll ends
- Bearing Sizes – 6205 to 6310
- Noise – typically less than 75 dBA
- Material Specifications – SANS 657 III conveyor-grade steel tube
Please contact Lorbrand for information on our full product range.
| SERIES | DIAMETER (mm) | SHELL WALL (mm) | NOMINAL SHAFT DIAMETER (mm) | BEARING PART NO. | MIN BEARING DYNAMIC LOAD RATING (N) |
|---|---|---|---|---|---|
| 27 | 127 | 3.8 | 25 | 6305 – 2RS | 22 500 |
| 152 | 4 / 6 | ||||
| 32 | 152 | 4 / 6 | 30 | 6306 – 2RS | 28 1000 |
| 178 | 6 | ||||
| 35 | 152 | 6 | 35 | 6307 – 2RS | 33 200 |
| 178 | 6 | ||||
| 40 | 152 | 6 | 40 | 6308 – 2RS | 41 000 |
| 178 | 6 | ||||
| 45 | 152 | 6 | 45 | 6309 – 2RS | 52 700 |
| 178 | 6 |
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.
Steel Tube
Only high-quality tube specially manufactured for conveyor idlers is used and conforms to SABS 657/3 (1980). Shell ends are machined to prevent belt wear.
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.
Hollow Shaft on request
Stepped lightweight hollow steel shafts, equivalent in strength and rigidity to solid shafts, are available on request.
Bearing Housing
Manufactured from high-grade fibre-filled nylon 66 engineering thermoplastic. heat stabilised for long term use at high temperatures. Flame retardant version complying to UL94 (V-0) classification also available.
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.
| ROLLER FACE LENGTH (MM) | TIR | |
|---|---|---|
| D<=127 | D>127 | |
| Up to 536 | 0.5 | 0.6 |
| 586 to 965 | 0.7 | 0.9 |
| 994 to 1 450 | 1.3 | 1.6 |
| 1 602 to 2 518 | 1.9 | 2.3 |
