Specification of the Bunting Overband Magnet

Overband Magnet Facts, Figures and Tips

The Overband Magnet is one of the most common Magnetic Separators used in the world today.  Also known as the Cross Belt Magnet or Suspended Permanent Magnet, the Overband Magnet is a workhorse used in nearly all industries and especially in recycling, aggregates and bulk handling.

Bunting Cross Belt Magnet Separating Steel UBCs-

In operation, the Overband Magnet is suspended over a conveyor transporting material and attracts ferrous metal up and out of the material.  There are 2 positions in which the Overband Magnet can be suspended:

  • Position 1 – Across the conveyor belt;
  • Position 2 – Over the head pulley of the conveyor;

Position 2 enables better levels of separation, although the head pulley does need to be non-magnetic.

The performance of the Overband Magnet is influenced by:

  1. Suspension height above the conveyor;
  2. Design of the magnetic field (Twin Pole, as supplied by Bunting, or the more common Single Pole);
  3. Strength of the Magnetic Field (the Twin Pole design has a higher force density and, therefore, magnetic pull, at the same suspension height as a Single Pole design);

The range of Bunting Twin Pole Overband Magnets are available with both hydraulic and electric drives and include two models with different frame specifications:

  • Model CBS – Constructed out of stainless steel to prevent ferrous metal being attached to the Overband Magnet frame.  This is ideal for applications where metal is long and thin such as nails and screws in woodchips;
  • Model CBSV – Standard steel frame

All the Models are designed for suspension at 300mm above the conveyor belt with a magnetic block wide enough to suit a range of conveyor widths including:

  • CBS/CBSV-60-60: 600mm wide conveyor belt;
  • CBS/CBSV-60-80: 800mm wide conveyor belt;
  • CBS/CBSV-60-100: 1000mm wide conveyor belt;
  • CBS/CBSV60-120: 1200mm wide conveyor belt;

Selecting the right Overband Magnet for a specific application is difficult for most customers as the outward appearance is very similar for very different designs and strengths.  When asking for companies to quote for an Overband Magnet, ask some key questions including:

  • Does the Magnet block have a single or twin pole?
  • What is the recommended suspension height above the conveyor for the Overband Magnet?
  • What metal test piece will the Overband Magnet lift up from the conveyor?  The could be a specific size of nail or bolt and will enable a test to be undertaken to confirm that the Overband Magnet that has been supplied is the same as that quoted;

For further information on the Bunting range of Overband Magnets or to discuss an application with a member of the Technical Sales Team, please contact us on:

Phone: +44 (0) 1442 875081
Fax: +44 (0) 1442 875009
Email: sales@buntingeurope.com
Web: http://www.buntingeurope.com

Bunting Vulcanis--2


Buoyant European Plastics Industry

Investment Up in Capital Equipment such as Magnetic Separators and Metal Detectors

PRW reports that at the end of 2015, the European Plastics Industry is in a healthier position than 12 months earlier.  This is very positive news for plastic machinery manufacturers, with 53% of the European Plastics Distributors Association (EPDA) members reporting that they had increased expenditure on machinery compared to the same time the previous year.

As a supplier of Metal Separation equipment such as Magnetic Separators and Metal Detectors, this increased demand has been a contributory factor to the record results for Bunting Magnetics Europe in 2015.

Bunting Drawer Magnet in a Plastics Operation

With the impending political tsunami, otherwise known as the UK’s EU referendum, dominating the headlines until the Summer, the effect of this uncertainty on investment in machinery is unclear.

Plastics manufacturers will always need equipment to both remove and detect metal, especially as investment will ultimately save money by reducing the amount of rejected material and reducing damage to processing plant such as granulators and injection moulding machines.  However, will companies just delay investment until after the UK referendum?

The news reported by PRW is really positive and it will be interesting to read about the level of investment and growth or decline in the Plastics sector during the first half of 2016.

Bunting Magnetics is a global supplier of Magnetic Separation and Metal Detection equipment for the Plastics Industry.  For further information on metal removal or detection, please contact the technical sales team on:

Phone: +44 (0) 1442 875081
Fax: +44 (0) 1442 875009
Email: sales@buntingeurope.com
Web: http://www.buntingeurope.com

The benefits of a Twin Pole Overband Magnet

The Bunting Product of the Month for February 2016

The Overband Magnet is one of the most commonly used Magnetic Separators in the world and is found suspended over conveyor belts transporting materials such as aggregate, household refuse and woodchips.

Bunting Overband Magnet over Conveyor

The basic design of an Overband Magnet has a Magnet Block positioned between two pulleys over which runs a rubber conveyor belt.  The conveyor is driven either with a hydraulic or electric motor and enables ferrous metal attracted up to the face of the Magnet Block to be transported away from the conveyor and discarded.

The magnetic magic of an Overband Magnet is the design of the Magnet Block.  The vast majority of Overband Magnets have single pole Magnet Blocks, but the Bunting design is different.

Bunting Overband Single and Twin Pole Magnetic Field

The Bunting Overband Magnet has a Magnet Block with two magnetic poles.  This is more difficult to manufacture and uses more material, but enables an enhanced level of separation.  In certain applications such as removing nails from conveyed woodchips, the Twin Pole Overband Magnet is the only suitable design.

So when should a Twin Pole design of Overband Magnet be considered?  If the following is important, then a Twin Pole Overband Magnet design should be used:

  • Maximum separation of ferrous metal to protect processing equipment such as a crusher;
  • When separating ferrous metal that is long and thin (such as nails from woodchip).  A Single Pole design will result in nails hitting the conveyor on the point and sticking into the belt;
  • Maximum recovery of ferrous metal such as in refuse and MRF recycling operations;

A selection of photographs of installed Bunting Overband Magnets can be seen on our Pinterest and Flickr social media channels.

For further information on the Twin Pole design of Overband Magnet, please contact the Bunting technical sales team on:

Phone: +44 (0) 1442 875081
Fax: +44 (0) 1442 875009
Email: sales@buntingeurope.com
Web: http://www.buntingeurope.com

Can the UK Match Brazil for Aluminium Recycling?

Record Breaking Aluminium Can Recycling in Brazil

This news in Recycling International must have raised a few eyebrows in the UK and European recycling communities.  Even though Brazil has been the number 1 Aluminium Can Recycler since 2001, the latest reported figures of 98.4% recycling is very impressive.  Maybe even more so when you consider that the EU recycling rate of Aluminium UBCs is around 70%.


Reclaim, Recover and Recycle continues to be the mantra of European governments and although huge advances have been made in the past decades, reaching politically set targets appears to be difficult. And yet a developing country like Brazil, with considerable social and economic challenges, has nearly been able to achieve the impossible 100% recycling target.

In the UK, a large proportion of Aluminium UBCs are recovered through Materials Reclamation Facilities (MRFs).  The feedstock to these recycling operations varies considerably from well pre-sorted to almost mixed waste.  There is no single UK waste strategy and each local authority pursues their own individual recycling agenda.

Within the recycling process of a MRF, most use a Non Ferrous Metal Eddy Current Separator.  This Magnetic Separator operates on the basis of material being conveyed into a strong and rotating magnetic field which then causes the aluminium to be propelled away from non-metallic material.  The separation is very dynamic and impressive to see.

However, the success of the Eddy Current Separator is dependent upon the presentation of material.  This means that deep heavy burdens of waste will commonly result in poor levels of recovery and low metal purity.  Presentation is key.

In practice, many of the recycling operations are focused and judged on material throughput and not recovery and this means that equipment like the Eddy Current Separator is often overloaded and, therefore, under-performs.  It is a common problem and a challenge for many MRF operators.

Again, the success of recycling comes down to which targets are set and maybe this is where Brazil has got it right.

For further information on Magnetic Separation equipment used to recover both steel and aluminum from waste, please contact our technical sales team on:

Phone: +44 (0) 1442 875081
Fax: +44 (0) 1442 875009
Email: sales@buntingeurope.com
Web: http://www.buntingeurope.com

Bunting Exhibition Success at Southern Manufacturing 2016

Magnets, Magnetic Separators and Magnetic Assemblies Generate Interest

Bunting Europe’s Head of Sales, Dave Hills, was thrilled with the response and level of interest at the Southern Manufacturing & Electronics Exhibition held at FIVE in Farnborough between the 9th and 11th February 2016.


“We generated 50% more leads than in 2015 and the quality of those leads is higher,” stated Hills.

“There was a great deal of interest in magnetic assemblies, including one from a German company who had travelled to the UK specifically to find potential suppliers.”

“Many visitors were actually surprised that we manufacture and design magnets and magnetic assemblies in the UK.  Sadly, over the past two decades, the number of companies in Europe with such magnet manufacturing and design expertise has fallen dramatically, with most supplies now coming from China.  Being at the show gave us the opportunity to stand up and shout about our UK manufacturing prowess, which was fantastic!” explained Hills.

“What we find is different about the Southern Manufacturing and Electronics show is the diversity of the visitors and exhibitors.  We have 3 distinct and very different product groups [Magnetic Separation & Metal Detection; Magnets & Magnetic Products; Magnet Production & Magnetic Assemblies) and this is the only show where we have interest right across our range.  We had a number of leads from plastic injection moulding companies for Magnetic Separators and Metal Detectors to remove metal contamination.”

Hills is excited by the new opportunities.  “We met many customers and companies with whom we are already in discussion with regards to specific projects.  Since the show finished last week, our sales team has visited several companies who came to our stand.  The potential is fantastic!”

Photographs from the exhibition can be seen on the Bunting Photo Gallery.

For further information on Bunting Magnetics Europe or discuss a specific project, please contact our technical sales team on:

Phone: +44 (0) 1442 875081
Fax: +44 (0) 1442 875009
Email: sales@buntingeurope.com
Web: http://www.buntingeurope.com


Magnetically Fanning Sheet Metal but How?

Helping Manufacturing Productivity and Safety with Magnets

Handling and prying apart ferrous metal sheets can be difficult especially if they are oily or polished.  The Metal Sheet Fanner uses magnetic forces to induce a magnetic field into the ferrous metal sheets, creating magnetic poles that then repel each other.  This then causes the end of the metal sheets to ‘fan’, enabling fabricators and operators to then easily select one sheet at a time.


There are different models, sizes and designs to suit a wide range of Metal Sheet sizes and operation environments.  These include:

  • Standard Sheet Fanners for manual handling operations;
  • Sheet Fanners for use on robotic lines that can be turned on and off;
  • Machine mounted Sheet Fanners;
  • Pivoting Sheet Fanners which are ideal for irregular shaped parts;

Bunting recently displayed and demonstrated the Magnetic Sheet Fanners at the Southern Manufacturing show in Farnborough, UK and shot a video showing a simple demonstration showing how a Magnetic Sheet Fanner works.

For further information or a new brochure on the Magnetic Sheet Fanner or further advice on Magnets and Magnetic Equipment, please contact the Bunting Europe customer service team on:

Phone: +44 (0) 1442 875081
Fax: +44 (0) 1442 875009
Email: sales@buntingeurope.com
Web: http://www.buntingeurope.com

Magnetic Demos at Southern Manufacturing

Bunting Magnetics Showing Exhibition Visitors the Magnetic Magic of the Metal Sheet Fanner

Demonstration has been key on the Bunting Magnetics Europe stand (U74) at the Southern Manufacturing exhibition being held at FIVE in Farnborough between the 9th and 11th February.

The equipment is simple.  It is a Magnet that simply splays metal sheets to make it easier to handle.  The Metal Sheet Fanner is nothing more than that.  However, manually trying to separate sheets of potentially oily steel can be a nightmare.  Try it or ask any fabricator.

This makes manufacturing life easier, improves productivity and makes the workplace safer.

To see how the Metal Sheet Fanner works, please drop by stand U74 at the show or take a look at the YouTube video.

For further information on what sizes of metal sheets can be handled and how the Metal Sheet Fanner can be installed, please contact our technical sales team on:

Telephone:+44 (0) 1442 875081

Email:  sales@buntingeurope.com

Contact us via our website


New Website, Bunting Magnetics Europe Ltd

Bunting Europe Launches New Website

New Digital Marketing Platform for Bunting

Bunting Magnetics Europe has launched a new dynamic and responsive website for Magnet and Magnetic Solutions to reflect several years of growth and changes in the business.

New Bunting Europe Website

Bunting Magnetics Europe Ltd, the European arm of the global Bunting Magnetics Group, has a manufacturing facility in Berkhamsted, UK where they design, manufacture and supply a wide range of magnet and magnetic based solutions.

The new website www.buntingeurope.com will have three (3) distinct customer experience areas focusing on the wide-ranging products and services offered by the company including:

The new responsive website will provide information on products including descriptions, specifications and photographs as well as regular industry and product commentary via blogs.  A wide selection of Magnetic Equipment and Magnets will also be available for purchase online.

Simon Ayling, Bunting Europe’s Managing Director, explained the reasoning for the new website.

“The marketing landscape continues to evolve rapidly and the importance of digital marketing cannot be understated.  Companies need to be constantly reviewing their presence online, not only on their websites but also on social media platforms.  The new website has been designed to reflect those changes, becoming more informative and making it easier to use.  This is just the start and we already have plans to increase the amount of interaction on the site.  We also welcome feedback from all visitors.  This site has to work for them.”

For further information on any Magnetic Separator, Metal Detector, Magnet or Magnetic Assembly application, please contact our technical sales team on: