Magnets & Sorters · Integrated
Permanent Overhead Magnet
Self-cleaning ferrous recovery with no power supply on the magnet — permanent field, minimal maintenance, always on.
The Sherbrooke OEM permanent overhead magnet position integrates a self-cleaning overband magnetic separator (Steinert UMP class or equal) mounted inline over the conveyor belt. A permanent magnet block — no coils, no rectifier, no excitation power — holds the field continuously while a motorized cleated belt sweeps captured ferrous to the discharge. Sherbrooke OEM engineers the suspension structure, splitter chutes, and the conveyor interface, including a stainless steel head section or drum on the carrying conveyor beneath the magnet.
Where It Fits
- Ferrous recovery on single-stream and MSW lines with moderate burden depth
- Positions where simplicity and zero excitation power beat maximum field depth
- Protecting downstream equipment — optical sorters, eddy currents, balers — from tramp metal
Configuration & Options
Every unit is engineered per project — these are the configuration choices and options we quote against, not limits.
| Model class | Self-cleaning overband permanent magnet (Steinert UMP class or equal) |
|---|---|
| Magnet block | Sized per belt width and working distance — engineering default around 29 x 44 in |
| Mounting | Inline over the belt; cross-belt per layout |
| Motor orientation | Left- or right-hand per access and layout |
| Conveyor interface | Stainless steel head section or drum on the conveyor below |
| Belt protection | Optional stainless armor cladding on the magnet belt |
Construction
| Magnet | Permanent magnet block — no excitation power, no cooling system |
|---|---|
| Cleaning belt | Motorized cleated belt (EP multi-ply class) sweeping the magnet face |
| Drive | Geared motor drive on the cleaning belt |
| Suspension | Engineered structural steel suspension by Sherbrooke OEM |
| Chutes | Formed steel splitter chutes, flanged to downstream conveyors |
| Guarding | Guarded to OSHA requirements |
Related reading: from the Knowledge Hub
Permanent Overhead Magnet — Frequently Asked Questions
Does a permanent magnet weaken over time?
Not meaningfully at plant temperatures and duty — modern permanent blocks hold their field for decades. What does change recovery is working distance, burden depth, and belt speed, which is why the position is engineered rather than just hung.
What maintenance does it need?
The cleaning belt and its drive are the wear items: belt condition, tracking, and the discharge area. There are no coils, oil, or rectifier to service — that simplicity is the main reason to choose permanent over electro where the burden allows.
Why does the conveyor under the magnet need a stainless section?
A magnetic field will act on a carbon-steel head pulley or deck, holding ferrous against the belt instead of releasing it to the magnet. A stainless (non-magnetic) head section or drum under the separator keeps the field working on the material, not the conveyor.
Need dimensions, capacity, or a budget price?
Send your material profile and layout — engineering answers with real numbers, from the team that will fabricate it in Sherbrooke.
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