Aluminium Rollers
Aluminium idlers are lightweight and quieter than steel which makes them ideal for installations that must adhere to strict occupational health and safety codes.
Increasingly these idlers are being used at large belt-width installations, like coal mines, that feature aerial walkways. With high-corrosion resistance, aluminium idlers are also ideal for coastal applications.
Key Aspects
- Diameters – 152—178mm
- Roll Lengths – 150—2200mm
- TIR – Typically less than 0.3mm at roll ends
- Noise – Typically 5—10 dBA less than their steel equivalent
- Bearing Sizes – 6306 to 6310
- Material Specifications – Special temper-calibrated aluminium 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) |
|---|---|---|---|---|---|
| 25 | 127 | 4.3 | 25 | 6205 – 2RS | 14 000 |
| 152 | 5 | ||||
| 27 | 127 | 4.3 | 25 | 6305 – 2RS | 22 500 |
| 152 | 5 | ||||
| 32 | 152 | 5 / 6 | 30 | 6306 – 2RS | 28 100 |
| 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 | ||||
| 50 | 178 | 6 | 50 | 6310 – 2RS | 61 800 |
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 than other bearing designs and classes.
Aluminium Tube
OOnly high-quality temper-calibrated aluminium tube, specially manufactured for conveyor rollers, is used.
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
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.
Corrosion Protection
Axles coated with Tectyl.
Circular Movement Tolerance (TIR)
TIR does not exceed 0.3mm measured at a distance of 25mm from the roller end face. Actual TIR values are less and can be verified by referencing to historical data.
| ROLLER FACE LENGTH (MM) | TIR |
|---|---|
| ALL DIA’S | |
| Up to 536 | 0.4 |
| 586 to 965 | 0.5 |
| 994 to 1 450 | 1.0 |
| 1 602 to 2 518 | 1.6 |
