Composite Rollers
Lightweight, low-noise and belt-friendly in wet carry-back and corrosive environments: glass-fibre-reinforced HDPE tube with injection-moulded GF nylon PA66 bearing housings, seated in long concentrically bored landings.
⌀127–219mm
Tube diameters
⌀25–65mm
Nominal Shaft
6305–6312
Deep-groove bearings
4-stage
Sealing system
GF nylon housing · 4-stage seal
GF HDPE tube · 18–22 mm wall
Concentrically bored landings.
Glass-fibre-reinforced materials.
Lightweight, low-noise Lorbrand composite rollers reduce damage to the belt when a roller fails, and reduce injuries during roller installation and change-out. They perform particularly well where there is wet carry-back and in corrosive environments. For heavier belt loads, HDPE- or UHMWPE-lined rollers put a machined polymer running surface on a steel roller body.
Long, mutually concentric bores are machined simultaneously into the glass-fibre-reinforced HDPE tube, which spreads the load evenly across the bearing-housing flange seats.
The materials are a balanced choice. Glass-fibre-reinforced nylon PA66, with a high Vicat softening point and heat-deflection temperature, is used for the bearing housings, where temperature and load are highest. GF HDPE tube has good wear and non-stick properties, and is cost-effective.
Low mass, low noise, low TIR.
Six design features that determine bearing and roller life.
Low weight, low noise
Reduces the risk of injury during installation and change-out, and the risks associated with noise.
Belt friendly
Reduces the risk of belt damage from a failed roller or from poor maintenance.
Machined running surface
The tube running surface is machined for low TIR and smooth running at belt speed.
High-strength bearing housings
GF nylon PA66 housings are seated in long, concentrically bored landings and secured by friction fit and a snap-in groove.
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.
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 |
|---|---|
| Glass-fibre-reinforced HDPE tube |
Eight standard diameters, 18 to 22 mm wall.
⌀127⌀133⌀152⌀159⌀178⌀193⌀203⌀219
|
| Bearing housings | Injection-moulded glass-fibre-reinforced nylon PA66 |
| Steel shaft | CNC-machined, with ground bearing spindles from 25 to 65 mm |
| Bearings | Standard deep-groove sizes.
6305630663076308630963106312
|
| Seals | Centrifugal, labyrinth, storage and bearing seal |
| Options | Sensor Seals, hollow shafts, fire-retardant housings and tube |
All dimensions in mm, nominal. Confirm application-specific details with Lorbrand engineering.
Quality control and testing
Dimensional inspection of bores and spindles, TIR checks on the machined running surface and roller running checks, carried out to the inspection and test plan for each order.
