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Rectangular neodymium magnet 40 by 40 by 20 mm with nickel coating and chamfered corners

LOVIMAG N52 Neodymium Magnet 40x40x20mm 250lb

SKU CH-ZM1T-31QEY

A 40x40x20mm N52 neodymium block rated to hold 250lb, suited for hanging heavy tools or cookware

  • Holds up to 250 lb of ferromagnetic material
  • N52-grade neodymium-iron-boron for maximum pull force
  • Three-layer Ni-Cu-Ni coating resists corrosion and wear
  • Chamfered corners reduce pinch risk during handling
  • 40 x 40 x 20 mm block suits tool, kitchen and workshop tasks

Heavy-Duty Holding Magnet

This LOVIMAG neodymium block measures 40 by 40 by 20 millimetres and uses an N52 grade alloy. A triple nickel-copper-nickel coating protects the material from corrosion and wear. Each corner is chamfered to reduce sharp edges during handling. The magnet is rated for a theoretical pull force of 250 pounds under ideal conditions.

Workshops and Makers; Not for Precision Sensors

The strong field suits tool rooms needing to secure heavy hammers, axes or metal stock. It also works in kitchens for holding cast-iron cookware or knives on a magnetic strip. Buyers who require a low-profile disc, a countersunk mounting hole or a calibrated field for scientific instruments should look at a different format.

N52 Grade Pull Rating

The single figure that decides fit is the 250-pound theoretical hold rating combined with the N52 material grade. This number assumes direct contact with a thick, flat mild-steel surface; paint, air gaps or thinner steel will reduce actual force. Verify that your mounting surface and load case match those conditions before purchasing.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $29.99
Pricier than about 61% of the 2,607 comparable items (median $18.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I mount the 40x40x20 mm N52 magnet without trapping my fingers?

Keep hands clear of the gap between the magnet and any ferrous surface; use a non-magnetic spacer or clamp to position it, then release slowly so the 250 lb pull force engages without pinching.

Will the Ni-Cu-Ni coating need any upkeep over time?

The triple-layer nickel-copper-nickel finish resists corrosion under normal indoor use; wipe with a dry cloth if moisture collects, but no re-coating or lubrication is required.

At what point does the 250 lb hold force drop off during continuous load?

The rated 250 lb figure assumes perfect flat contact and room temperature; sustained shear stress, vibration, or an uneven mounting face will reduce effective hold before the magnet itself degrades.

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