Overband magnets are suspended over conveyors to separate tramp ferrous metal, they are available as permanent and electromagnetic designs. Recent investment in manufacturing techniques and magnet technology have enabled us to offer the most comprehensive range of overband magnets with the highest levels of performance.
Supplying all industries, volume OEM’s and one off installations, Bunting has the overband magnet to suit your application.
• Three distinct model types of permanent overband magnets
• Three deep field model types of electro overband magnets
• Compact and lightweight permanent and electro overband magnets
• Range of overband magnets available now from stock
We now hold the most popular models in stock, these are available for same day dispatch
Overband Magnets are designed to lift and automatically remove ferrous metal from conveyed non-magnetic material. The basic design features a permanent or electromagnetic box mounted in a frame with two or four pulleys and a self-cleaning rubber belt.
Permanent Overband Magnet designs are commonly found on mobile plants such as crushers, screens and shredders, in quarries and in recycling operations.
Stronger Electro Overband Magnets are used on more difficult applications such as found in the Mining industry, in bulk handling terminals and also some recycling operations.
The Bunting designs have evolved over 40 years, with standard models accompanied by bespoke designs to suit specific applications.
Through their European sales offices and distributors, Bunting offers:
- An extensive range of Permanent and Electro Overband Magnet design sizes to suit all applications
- Welding to ISO3834 accredited standards
- Accreditation to ISO9001 quality standards
- Custom design service
- Technical application engineers available to advise and assist
- Qualified service engineers and technical support
- Same day dispatch on a vast range of spare parts
In operation, material is conveyed underneath an Overband Magnet which attracts, lifts and then removes tramp metal. The size and magnet type (Permanent or Electro) is dictated by the conveyor width, depth of material on the conveyor and the nature of the tramp ferrous metal.
The Overband Magnets are mounted either across the conveyor belt (i.e. Crossbelt) or in line with the conveyor belt over the head pulley of the conveyor (i.e. Inline).
Permanent Overband Magnets
PCB Permanent Overband
Heavy-duty range designed mainly for recycling and quarrying industries to remove ferrous tramp. For conveyors 300 to 2000mm wide at operating heights up to 400mm
- High magnetic performance
- The selection available from stock
- Range of sizes and options to suit your application
PCB-C Compact Permanent Overband
Aimed at the volume mobile equipment market. More compact and lightweight. For conveyors 600 to 1500mm wide at operating heights up to 300mm.
- Latest Manufacturing technology to reduce weight and size
- Increased magnetic force to weight ratio
QBC Quick Belt Change
Fast belt change overband magnet for reduced downtime. For conveyors 600 to 1500mm wide at operating heights up to 300mm.
- Top and bottom belt guides and guards
- Range of sizes and options to suit your application
ElectroMax Compact Air Cooled
High performance, lightweight, air-cooled electromagnetic overband. For conveyors 1000 to 1800mm wide at operating heights up to 600mm.
- Highest magnetic power to weight ratio of any overband magnet
- No oil present
- Low profile, compact design
- Designed using the latest finite element analysis software
OCW Heavy Duty Oil Cooled
Heavy-duty oil-cooled electromagnetic overband range is available in over 300 sizes. For conveyors 500 to 3000mm wide at operating heights up to 1000mm.
- Manganese baseplate for high wear and impact resistance
- Unique long life powerful magnetic coil design
- ATEX rated models available
ACW Heavy Duty Air Cooled
Heavy duty air cooled electromagnetic overband range available in over 300 sizes. For conveyors 500 to 3000mm wide at operating heights up to 1000mm.
- No oil present
- Permanent extension magnets can be attached to extend the discharge zone away
Model Guide and Options
All our overbands have a vast range of options to suit your application and requirements.
Please call our experienced applications engineers to help specify the correct magnet and options for your individual application.
|Maximum operating gap||400||300||300||600||1000||1000|
|Maximum customer belt width||2000||1500||1500||1800||3000||3000|
|Air/Oil cooled electro system||Air||Oil||Air|
|Drive||Electric / Hydraulic||Electric / Hydraulic||Electric / Hydraulic||Electric||Electric||Electric|
|Heat resistant, antistatic belt||•||•||•||•||•||•|
|Stainless steel frame||•||•||•||•||•||•|
|Custom design mounting brackets||•||•||•||•||•|
|Cantilever frame design||•|
|Full sheet guarding||•||•||•||•|
|Belt tracking limit switches||•||•||•||•||•|
|Permanent magnetic extension||•||•||•|
|Single pole magnetic system||•||•||•|
|Twin pole magnetic system||•|
|Tri-polar magnetic system||•||•||•|
|Special paint coatings||•||•||•||•||•||•|
Overband Magnets are found in most handling plants featuring conveyors. The correctly sized and positioned Overband Magnet will remove ferrous metal to prevent damage to other processing plant such as crushers, screens, shredders, conveyors, etc. Typical installations include:
- Mobile crushers, screens and shredders
- MRF (Material Recovery Facility) and pre-sorted refuse plants
- Municipal solid waste plants
- Mining Operations
- Bulk handling terminals
- Wood waste processing plants
- Fragmentiser plants for shredded vehicles
- Cullet (crushed glass) recycling plants
- Industrial skip waste recycling operations
Site Evaluation Service
Bunting offer a site evaluation service to give us more understanding of complex or specialised applications, this enables us to evaluate a client’s application so that we can recommend the most effective form of magnetic separation. Please contact us on 01527 65858 to talk to one of our application engineers.
Tri-polar magnetic system
To enable the high magnetic strengths required at large operating gaps, or to reduce the magnetic leakage when handling high volumes of small particles such as nails, the tri-polar magnet system is used. The extra poles on the side of the magnet alter the magnetic field and the 8mm thick Manganese impact plate on the magnet face increases wear life.
Twin pole magnetic system
The twin pole magnet has lifts tramp iron with a more horizontal extraction position and therefore is suitable where a high proportion of the tramp is long iron bars, as this minimises belt wear.
Single pole magnetic system
The most common type of magnet design, the single pole magnet is a reliable design suitable for tramp iron removal in a wide variety of applications.
A range of sensors can be fitted to the overbands, including belt limit switches, rotation sensors, and temperature sensors in the motor.
Full sheet guarding
Nip point guards are fitted to all permanent overband magnets, mesh guards or full sheet steel guards can be fitted if required.
Designed to increase the wear life of belts in arduous conditions with large ferrous tramp removal, plastic armour can be fitted to the standard PCB overband magnet belt to reduce the cost of replacing the magnet belt and reduce costly downtime.
Heat Resistant, Antistatic Belt
In high-temperature applications, a heat resistant belt can be fitted to the overband to help reduce belt damage and extend belt life.
The standard PCB overband magnet can be manufactured to ATEX standards. For this environment we have ensured that the products meet all of the essential health and safety requirements, have undergone appropriate conformity procedures for the required Zone and a technical dossier has been produced that includes drawings, hazard analysis, risk assessments and user manuals. Using their technical experience Bunting are also able to produce equipment that conforms to other National Standards, such as CSA & UL