Polymer conveyor idler rollers are specified where steel fails early: wet coal, gypsum, fertiliser, salt, cement slurry and wash-down lines. The UHMWPE shell is non-conductive, non-magnetic and does not pick up iron powder or sticky fines, so the belt stays clean and...
Compared with a steel roller of the same size, the polymer version weighs about one sixth as much and runs at roughly half the noise level. Because the shell cannot rust, a seized bearing does not turn the shell into a grinding wheel against the belt — the usual cause of a torn carcass on steel idlers.
Assembly uses cold-drawn shafting, sealed bearings from HRB, LYC, SKF or NSK, and a labyrinth end cap. Standard diameters run from 89 mm to 219 mm with face lengths up to 3500 mm. Special shaft ends, bearing combinations and shell colours are machined to drawing.
UHMWPE conveyor idler rollers replace steel rollers on belt conveyors carrying wet, sticky or corrosive bulk material. The polymer shell does not rust, does not build up material, and weighs roughly one sixth of a steel shell of the same dimensions, which cuts rotating mass and starting torque on the drive.
Each roller is assembled with cold-drawn shafting, a sealed bearing and a labyrinth end cap, so the bearing stays protected in dust and wash-down duty.
| Item | Range |
|---|---|
| Roller diameter | 89 / 102 / 108 / 114 / 127 / 133 / 140 / 152 / 159 / 165 / 178 / 194 / 219 mm |
| Shell thickness | 6 – 10 mm |
| Face length | 190 – 3500 mm |
| Shaft diameter | 20 / 25 / 30 / 35 / 40 / 45 / 50 mm |
| Bearing | 6204 / 6205 / 6305 / 6206 / 6306 / 6307 / 6308 / 6309 / 6310 |
| Seal | Labyrinth, felt or triple labyrinth |
| Shell material | HDPE or UHMWPE |
| Check | After assembly | Limit after drop test |
|---|---|---|
| Radial runout | 0.40 – 0.50 mm | < 0.70 mm |
| Axial runout | < 0.70 mm | < 1.50 mm |
| Rotation resistance | 1.50 – 2.50 N | < 3.75 N |
| Axial load capacity | 8.0 – 10.0 kN | < 10.0 kN |
Non-standard diameters, shaft ends and bearing brands are available against drawing.
