GUIDELINES FOR THE REDUCTION OF
THE RATED LIFTING CAPACITY:
I
IA
CAUTION
I:
Each Walker lifter model is rated for a different weight limit. Load characteristics
.
lwill affect the lifting capacity of the magnets. The lifting guidelines for the various
models are shown on the following pages.
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The Lifting Guidelines charts show the effect of air gap, load thickness, load length, and load width
on lifting capacity. As the thickness of the load decreases, so does the rated lifting capacity of the
magnet. The tables show the maximum weight or load size that can be lifted for each thickness under
varying air gap conditions.
DO NOT EXCEED EITHER THE MAXIMUM LOAD WEIGHT OR LOAD
SIZE FOR EACH THICKNESS.
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Each value shown in the Lifting Guidelines charts is for SAE 1020 steel Any increase in alloy content
will result in further reduction of the lifting capacity of the magnet.
THIS TABLE PROVIDES SOME REDUCTION
FACTORS FOR
MATERIAL OTHER THAN SAE 1020 STEEL
Reduction Factors for Materials
Other than SAE 1020 Steel
Materials
Cast Steel
3% Silicon Steel
SAE 1095 Steel
16 Stainless Steel
Cast Iron (non-chilled)
Pure Nickel
REDUCTION FACTOR
0.90
0.80
0.70
0.50
0.45
0.10
For Other Materials Consult O.S. Walker
Rated Lifting Capacity (for these materials)= Reduction Factor multiplied by Maximum
Load Value (for 1020 Steel) from Lifting Guidelines. (Plate) Ref. page 15.
Example: Lifting SAE 1095 STEEL, 1/2" thick, ROUGH machined flat surfaces (use
.020" air gap) with a Model BM
2
-25PB magnet.
RATED LIFTING CAPACITY= 0.70 multiplied by 725 = 507 pounds
ADDITIONAL OPERATING INFORMATION
Avoid dropping, banging, or slamming the magnet into other objects.
Battery Powered Lifting Magnets are electromagnetic devices. Do not allow water to
enter the magnet body. Water is an electrical conductor and could short out the magnet.
If you have any difficulty lifting a load,
DON'T LIFT IT!
ADANGER
DANGER: NEVER DISCONNECT THE MAGNET FROM ITS POWER SOURCE WHILE IT IS
ENERGIZED! ELECTRICAL SHOCK MAY OCCUR AND CAUSE SERIOUS INJURY.
O.S. Walker Inc., Battery Powered Magnets
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