How do you design a conveyor belt cleaning brush?
Four decisions cover most of it. Mount a cylinder or strip brush where the belt is supported. Cover the full belt width. Use the least aggressive fill that still removes the residue. And give what comes off a path away from the product and the bearings, or it ends up back on the belt.
The roller, helical and sorting brushes this guide describes are listed under conveyor brushes; strip brushes are in the strip and seal brush group.
What do the published design figures say?
| Parameter | Design reference |
|---|---|
| Face width | Belt width plus 25.4 mm total overlap; 12.7 mm per side |
| Outside diameter | 102–305 mm published for conveyor cleaning cylinders |
| Mounting position | After and below the head roller, close to a support roller |
| Face pattern | Close-wound, open spiral or auger, chevron, staggered, segmented or mixed fill |
| Operation | Fixed strip, free-wheeling cylinder, or driven cylinder turning with or against the belt |
Which layout suits your belt?
| Layout | Use it for | Limitation |
|---|---|---|
| Driven cylinder | Sticky, persistent or high-volume residue | Needs a guarded drive, shaft, bearings and speed control |
| Free-wheeling cylinder | Loose particles and open-link belts | Less scrubbing energy |
| Fixed strip | Dry dust, crumbs, edge wiping, sealing | Loads up with sticky residue and adds drag |
| Open spiral or auger | Moves material sideways and keeps the face clear | The discharge side has to be contained |
| Segmented roller | Wide belts and lines that are costly to stop | More joints and alignment points |
Which fill suits which residue?
Dry particles and delicate belts: fine PA612 or PBT. Chemical washdown: polypropylene. Sticky food or process residue: medium or coarse polymer, with water or cleaner reaching the brush. Hot belts, hard carbon and scale: stainless or carbon steel wire, but only where the belt itself can take metal contact. Abrasive nylon sits between polymer and wire, for controlled scrubbing.
What goes wrong, and how do you fix it?
| Symptom | Cause | Fix |
|---|---|---|
| The center stays dirty | Face too narrow, shaft bending, belt crown or uneven density | More overlap, stiffer shaft, support the belt, correct the face pattern |
| The belt is marked or polished | Fill too coarse, trim too short or engagement too high | Finer fill, longer trim, lighter contact |
| The brush packs with product | Face too dense, or no path for debris or liquid | Open the spiral; add spray, a scraper, air or vacuum |
| Fast wear | Too much compression, speed, heat, chemical attack or sharp belt edges | Reduce engagement; change the material or the position |
| Debris goes back onto the product | Wrong side of the belt, or nothing to catch it | Move to the return run and add collection |
What should you send for a quote?
Belt type, width, speed and direction, the residue, temperature and washdown chemistry, the space available and where the support roller is, the layout you have in mind, the shaft or existing fitting, and motor data. Add the quantity and photos of the return run and the discharge area.
