Steel Rollers
Holds a true bearing seat for decades of service: thick pressed-steel bearing housings welded to precision conveyor-grade tube, calibrated in the final step.
⌀89–219mm
Tube diameters
⌀20–65mm
Nominal Shaft
6204–6312
Deep-groove bearings
4-stage
Sealing system
Pressed housing · 4-stage seal
SANS 657/3 steel tube
Welded construction.
Calibrated bearing seats.
Thick pressed-steel housings welded to high-precision, conveyor-grade steel tube give Lorbrand steel rollers their strength. Proprietary manufacturing techniques and purpose-built equipment keep weld deformation to a minimum.
In the final manufacturing step, an innovative calibration of the bearing housing seats ensures a consistently true bearing seat and a long bearing life.
Nothing moves, yields or creeps.
Five design features that determine bearing 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.
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 and low tube TIR 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 tube to seals, every component is listed below with its grade and standard sizes.
| Component | Specification |
|---|---|
| Steel tube · SANS 657/3 |
Thirteen standard diameters; thicker wall options available.
⌀89⌀102⌀114⌀127⌀133⌀139⌀152⌀159⌀165⌀178⌀193⌀203⌀219
|
| 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 |
All dimensions in mm, nominal. Confirm application-specific details with Lorbrand engineering.
Quality control and testing
Dimensional inspection, weld integrity, coating adhesion and roller running checks, carried out to the inspection and test plan for each order.
