To ensure that your IMI Lift Magnet , or any other manufactured brand, is performing to its optimal holding value, an annual calibration check at our facility is recommended. 

What is the De-rated "Holding Value" of my Lift Magnet?
Your lift magnet carries a "useable" holding or lifting value, which you will find stated on the side of the magnet.  This value is obtained by pulling a new magnet in a perpendicular motion off a newly machined, thick piece of steel.  This type of test is conducted under what we term "ideal conditions".  The pounds of pull it takes to break the magnet away from the steel surface is the "maximum" holding value.  De-rated values are then determined by taking this maximum holding value and cutting it in half(50%).  De-rated values are what we refer to as the "useable" value of the magnet.  This "useable" holding value is stated for the benefit and safety of the user, due to the fact that ideal conditions rarely exist in the field.  

For instance, the steel that you are holding or lifting may have scale, rust, dirt or coatings on its surface; or the surface of the magnet itself may be worn.  Any of these conditions will cause lower holding values for your Lift magnet.  

Why Should I Calibrate my Lift Magnet?
Under normal use conditions, a permanent lift magnet can experience a decrease in its original holding value which may affect the magnet's performance capabilities.  The most common factors which can cause a loss of strength include: 

(1) Everyday wear and tear on the magnet face, such as: fine metal buildup on or between the magnetic poles, nicks or gouges in the magnet's poles, rust buildup, etc. 

(2) Exposure to high heat

(3) Severe blow or shock to the magnet

(4) Exposure to electrical current

Lift Magnet Calibration Procedure: 
Under an "ideal conditions" environment, our state of the art equipment will perform a series of tests to determine the current "de-rated" holding value of your magnet.  This holding value must meet or exceed the value stated on your permanent lift magnet.   If the stated holding value is met, and you do not require any additional maintenance, we will return the magnet to you along with written documentation of the test results.   If the stated holding value is not met, we will contact you with the results of the test and our recommendations for returning the magnet to its original condition.  Options may include; the resurfacing of the magnet's poles, the repair of any broken or chipped epoxy, or the repair of any broken components.

Calibration Instructions:
It's quick and easy to schedule a calibration test for your lift magnet!   Just contact our customer service department at:800-342-4188, or 
send an email request to: sdewey@all-lifts.com
We'll give you the current fees for this procedure, turn-around time and your shipping instructions.