Conveyor Belt Cleaning Brush

A conveyor belt cleaning brush is a cylindrical roller brush placed against the return side of the belt, most often just after the head pulley or near the primary scraper. Its job is to remove the fine, damp, or sticky layer that primary blade scrapers leave behind, material that otherwise packs onto return idlers, gets thrown under the conveyor, or works into the belt splice and edge.

The brush can rotate in the same direction as belt travel or against it, depending on whether the goal is gentle polishing or more aggressive release. Rotation is provided by an electric or hydraulic motor, by coupling to the head pulley, or by belt contact on idling installations. Fill material, trim length, engagement depth, and speed are selected together so the brush contacts the belt cover evenly without trapping product or overheating.

This is a secondary cleaning tool, not a primary lump breaker. Large lumps, frozen material, or heavily compacted carryback should be removed by a primary scraper before the belt reaches the brush. The brush then removes the residual layer that would otherwise remain.

Each conveyor belt cleaning brush is built around the belt width, available mounting position, residue, and drive arrangement. The table shows the standard configurable range; values outside this range can be reviewed for the project.

• Aggregate, cement, and mining conveyors where limestone dust, clay, or fine ore packs onto the return side and idlers.
• Food processing lines carrying flour, sugar, grain dust, dough remnants, or crumbs on fabric or polymer belts where daily washdown and reduced buildup are required.
• Recycling and waste sorting belts where labels, film fragments, glass fines, and small paper particles stick or wedge at transfer points.
• Fertilizer, salt, and chemical handling lines with hygroscopic or corrosive powders that cake on the belt cover and need continuous cleaning.
• Wood, biomass, and paper conveyors moving chips, sawdust, bark, and fiber that fall from the belt edges and collect under the line.

Start with belt width, speed, and clearance

Record the actual belt width, belt speed, and the space available at the cleaning position. The brush working width should equal belt width plus 5 to 15 mm overlap per side. Check clearance between the head pulley, return idlers, frame rails, and any chute work so the brush outer diameter and shaft bearings fit without hitting the structure. Belt speeds above roughly 3 m/s usually require motor drive rather than idle contact to keep the brush rotating consistently.

Select the fill for the residue and the belt cover

PP is a good starting point for light, dry powder and where the belt cover must see minimal contact. Nylon wears longer and handles oily, damp, or sticky carryback with better recovery. 316 stainless wire is reserved for hard, compacted, or abrasive films, but it will increase belt cover wear and must not be used where metal contamination is a concern. Also check whether the belt has mechanical fasteners or a texture that could snag or cut the fill.

Set engagement from the residue film, not from habit

A radial engagement of 2 to 10 mm into the belt face is the standard working window. Start at the low end and increase only until the belt comes back clean. Excessive engagement raises motor current, bends filament, and accelerates belt cover wear without improving cleaning. Shallow engagement leaves a visible film, especially in the center or near the edges.

Choose the rotation and drive arrangement

Counter-rotation against belt travel gives the most aggressive sweeping action for sticky or damp material. Same-direction rotation polishes the belt face with less disturbance, which helps when dust containment is critical. Motorized drives with adjustable speed control are preferred where residue conditions change; head-pulley coupling works well where the brush position is fixed and belt speed is stable.

Confirm shaft, core, and environment details

For wet, washdown, or corrosive locations, use a stainless shaft and sealed bearing housings. For food lines, confirm that the fill, core, and adjacent components meet the sanitation requirements of the process. For high-temperature belt surfaces, verify the fill and core material limits together; the brush should be derated to the lowest-rated component in the assembly.

When a brush is not the right choice

Use a primary scraper blade for large lumps or frozen material; the brush cleans what the scraper leaves. Use an air knife or vacuum system if the product is so light and dusty that mechanical contact creates more airborne material than it removes. Use a segmented or non-contact cleaner if the belt surface has deep profiles or protruding fasteners that would snag the fill. The brush is strongest as a second-stage cleaner on accessible, reasonably flat return runs.

We begin with the project’s belt and residue data, then set the brush around five choices: dimensions, fill, core and shaft, drive interface, and mounting.

• Working width and sectioning, from 100 mm to 3,000 mm per section with multi-section assemblies across wide belts.
• Roller outer diameter, core inner or outer diameter, trim length, and shaft diameter or length, all set from the belt and available mounting space.
• Fill material and pattern: PP, PA, 316 stainless wire; straight, spiral, dense spiral, or combination rows; filament diameter and trim angle.
• Core and shaft materials: carbon steel, stainless steel, aluminum, or polymer core; keyed through-bore, split core, or stub shaft ends.
• Drive interface: plain shaft for customer coupling, sprocket, pulley, or direct gearmotor mount.
• Bearing and mounting: pillow block positions, flange plates, take-up frames, or retrofit brackets matched to existing conveyor structure.
• Color, marking, and packaging: project color coding, laser marking, plain identification, and bulk or individually wrapped shipment.

To define a configuration, send the belt width and speed, residue or product description, washdown or temperature conditions, available mounting space, and shaft or bearing dimensions if replacing an existing brush. Photos of the current installation and a sketch of the mounting position help us confirm fit faster. We can also support project-specific material declarations, incoming inspection, and third-party test requirements during the project.