Absorbs impact and sheds carry-back with NR/BR rubber discs vulcanised onto internal steel rings, which hold a constant interference fit on the Lorbrand steel roller body under the heaviest loads. Three configurations: impact, high-impact and rubber-disc return.
Disc diameters
Nominal Shaft
Deep-groove bearings
Sealing system
Pressed housing · 4-stage seal
NR/BR discs on steel rings
Every configuration shares the same welded steel roller body, shaft, bearings and seal stack. The configurations differ in disc section, disc pitch and where on the conveyor the roller runs.
Rubber discs along the full face of the roller, fitted in the carry-side impact frames under loading zones and transfer chutes. The discs absorb the impact of falling material and protect the belt and the roller body.
Heavier-section discs in a high-impact rubber compound for severe impact in loading zones. Available with solid CNC-machined housings and spherical bearings for extra-heavy duty.
Spaced discs on the return side shed carry-back and keep material from building up on the running surface.
| Impact | High-Impact | Rubber-Disc Return | |
|---|---|---|---|
| Position | Carry side, loading and transfer zones | Carry side, severe transfer zones | Return side |
| Disc arrangement | Full-face NR/BR discs | Heavier-section high-impact discs | Spaced NR/BR discs |
| Bearing housings | Deep-drawn steel | Deep-drawn steel or solid CNC-machined | Deep-drawn steel |
| Bearings | Deep-groove 6204–6312 | Deep-groove or spherical | Deep-groove 6204–6312 |
| Standard disc compound | NR/BR blend | High-impact NR/BR blend | NR/BR blend |
Configuration summary. FR, EPDM and PU disc compounds are available across the range. Disc diameter, pitch and compound are selected to the lump size, drop height, belt speed and site specification.
Impact and rubber-disc rollers are built on the Lorbrand steel roller: thick pressed-steel or CNC-machined housings welded to high-precision, conveyor-grade steel 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 long bearing life.
The rubber discs are vulcanised onto internal steel rings. The rings maintain a constant interference fit on the roller shell.
For extra-heavy-duty applications, solid CNC-machined bearing housings, spherical bearings and high-impact rubber compounds are available.
Five design features that determine bearing, disc and roller life.
Bearing seats are calibrated in the final manufacturing step and hold constant tolerances throughout decades of service.
The welded joint holds each housing in the shell, preventing the housing-to-shell failures that damage belt and frame.
The steel-ring core holds a constant interference fit on the shell, so the discs do not dislodge, even under the harshest conditions or loads.
Centrifugal seal, labyrinth seal, storage seal and bearing seal work in series to keep contamination out and grease in, for maximum roller life.
Axle spindles are CNC-machined and ground concentric to the shaft, so the bearing runs true on its seat.
From the discs to seals, every component is listed below with its grade and standard sizes.
| Component | Specification |
|---|---|
| Impact discs |
NR/BR blended rubber, vulcanised onto internal steel rings. Ten standard diameters.
⌀127⌀133⌀152⌀159⌀178⌀193⌀203⌀219⌀250⌀280
|
| Steel tube body · SANS 657/3 |
Five standard diameters; thicker wall options available.
⌀89⌀102⌀127⌀152⌀165
|
| Bearing housings | Deep-drawn steel; solid CNC-machined housings optional |
| Steel shaft | CNC-machined, with ground bearing spindles from 20 to 65 mm |
| Bearings | Standard deep-groove sizes; spherical bearings optional.
620462056305630663076308630963106312
|
| Seals | Centrifugal, labyrinth, storage and bearing seal |
| Options | Sensor Seals, hollow shafts, solid CNC housings, spherical bearings; FR, EPDM and PU discs |
All dimensions in mm, nominal. Confirm application-specific details with Lorbrand engineering.
Dimensional inspection, weld integrity, disc fit and roller running checks, carried out to the inspection and test plan for each order.
