Alnico Rectangular Bar Magnet

Bar Magnets ideal for educational use, reed switches, relays or hall effect sensors

  • 550° maximum operating temperature
  • Alnico 2 or 5 magnet material
  • Good corrosion resistance
  • Sold in pairs
  • North pole is indicated by a notch/dimple.

Overview - Alnico Rectangular Bar Magnet

Alnico rectangular bar magnets / Alnico rectangular rod magnet

The Alnico rectangular bar magnets are made from Alnico 2 and Alnico 5 grade materials. They are also known as alnico rectangular rod magnets and alnico bar magnets.

They can be used at temperatures of up to +550 degrees C. They are referred to as bar magnets because the distance between the poles is greater than the pole face dimensions (i.e. they are magnetised in the same direction as their longest dimension).

The Alnico rectangular bar magnets are supplied in the famous Eclipse painted (red colour) or natural finish (uncoated, unpainted). They are popular for sensing applications and for experimental use in schools.

We can supply such  Alnico rectangular bar magnets in other dimensions and grades as required as part of our custom magnet service subject to quantities. 

Ideal for educational usage and practical demonstrations,  a typical bar  magnet can also be commonly used to activate reed switches. In addition to rectangualr bar magnets we have a range of cylindrical shaped bar magnets.  

Model Variations

Product NumberGaussHeight (mm)Length (mm)MaterialUnits per packWeight per pair (kg)Width (mm)Length (in)Width (in)Height (in)Weight (lb)
E8427501050Alnico 220.22151.9680.590.3930.48
E8437501075Alnico 220.33152.9530.590.3930.73
E8441100520Alnico 550.03100.7870.3930.1970.07
E8451100540Alnico 550.0412.51.5750.4920.1970.09
E8461100560Alnico 550.13152.3620.590.1970.29

"We were delighted with the service provided by Eclipse Magnetics; from the initial site survey through to delivery."

Adrian Seeley, Production Supervisor at AB MAURI UK & Ireland

"I cannot begin to tell you how much it has helped our operation, the magnetic filtration unit has been a real problem solver it has surpassed all our expectations. Its cured a 30 year plague!"

Maintenance Manager at EXL Tube (Steel Ventures)

"This technology is economical, reliable and efficient. I believe that magnetic filtration technology is the future."

John Smith, MMTCI

"Magnetic filtration has dramatically cleaned up our fluids and improved the surface finish we can offer. It extracts around 50Kg per day of ferrous waste."

Facilities Manager, Milacron Machines (Sub-Contract Machining)

"We chose Eclipse Magnetics to supply our housed grid because they are a respected and well-established brand. They offered us a very competitive price, and the process of ordering and installation was straightforward and reliable."

Pat Richards, Chief Engineer at Simpsons Malt

“We are delighted with the Automag installation; it’s solved all the problems we were having previously with downtime and maintenance costs. The filter means that we are able to use recycled water, which is saving us £1000 per week!”

Kenneth McRae, Principle Engineer at Vallourec

"Here at Qualflow, we base our business on a philosophy of make the product simple to use, reliable and cost-effective. Eclipse Magnetics’ neodymium magnets offer the strongest magnetic performance, and are nickel plated, making them a cost effective.."

Justin Lawler Ph.D. MBA, Chief Technology Officer at Qualflow Systems Ltd

"The Ultralift Plus magnetic lifter from Eclipse Magnetics is the perfect solution for the pick-up and transportation of the ultrasonic calibration blocks in our facility"

John Crossley, NDT Technology Lead at the Nuclear AMRC

"The result is an aesthetically pleasing system, which is effective in trapping metal contaminants and is easy to clean..."

Ian Aunger at Roquette