HDPE & UHMWPE-Lined Rollers
HDPE or UHMWPE linings expansion-fitted over standard Lorbrand steel tube and machined to low TIR. For wet or sticky carry-back, belt loads too heavy for composite rollers, and weigh-scale idlers.
⌀127–219mm
Machined lining diameters
⌀20–65mm
Nominal Shaft
6204–6312
Deep-groove bearings
4-stage
Sealing system
Pressed housing · 4-stage seal
HDPE / UHMWPE lining · machined
Welded steel body.
Machined HDPE or UHMWPE lining.
HDPE or UHMWPE linings are expansion-fitted over standard Lorbrand steel tube and machined to low TIR. Underneath is the standard Lorbrand steel roller: thick pressed-steel housings welded to high-precision, conveyor-grade tube, with proprietary manufacturing techniques and equipment keeping weld deformation to a minimum.
Calibration of the bearing-housing seats in the final manufacturing step ensures a consistently true bearing seat and a long bearing life.
Lined rollers handle wet or sticky carry-back and carry heavier belt loads than a composite roller, whose tube is glass-fibre-reinforced HDPE rather than steel. They also suit weigh-scale rollers, and the polymer surface runs quieter than bare steel.
Nothing moves, yields or creeps.
Six design features that determine bearing, lining and roller life.
Precision bearing seats, constant tolerances
Bearing seats are calibrated in the final manufacturing step and hold constant tolerances throughout decades of service.
Welded housing-to-shell joint
The welded joint holds each housing in the shell, preventing the housing-to-shell failures that damage belt and frame.
Linings rigidly located on the tube
The expansion-fitted lining is rigidly located on the steel tube, with no axial or rotational displacement in service.
Proven 4-stage sealing system
Centrifugal seal, labyrinth seal, storage seal and bearing seal work in series to keep contamination out and grease in, for maximum roller life.
Low out-of-balance value
Accurate manufacture, low tube TIR and a machined running surface keep the out-of-balance value low, for smooth running at belt speed.
Concentrically machined & ground spindles
Axle spindles are CNC-machined and ground concentric to the shaft, so the bearing runs true on its seat.
Components and options
From the lining to seals, every component is listed below with its grade and standard sizes.
| Component | Specification |
|---|---|
| Lining · HDPE or UHMWPE |
Expansion-fitted and machined. Nine standard machined diameters.
⌀127⌀133⌀152⌀159⌀165⌀178⌀193⌀203⌀219
|
| Steel tube · SANS 657/3 | Various sizes to suit the lining and machined diameter |
| Bearing housings | Deep-drawn steel |
| Steel shaft | CNC-machined, with ground bearing spindles from 20 to 65 mm |
| Bearings | Standard deep-groove sizes.
620462056305630663076308630963106312
|
| Seals | Centrifugal, labyrinth, storage and bearing seal |
| Options | Sensor Seals, hollow shafts, vulcanised NR/BR rubber or cast PU linings |
All dimensions in mm, nominal. Confirm application-specific details with Lorbrand engineering.
Quality control and testing
Dimensional inspection, weld integrity, lining TIR after machining and roller running checks, carried out to the inspection and test plan for each order.
