11
Walker Magnetics, Inc., NEO Permanent Lifting Magnets
: Each Walker magnet model is rated for a different weight limit, and the load
characteristics will affect the lifting capacity of the magnets. The lifting guidelines
for the various models are shown on the following pages.
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 mag-
net. The tables show the maximum weight or load size, which can be lifted for each thickness under
varying air gap conditions. DO NOT EXCEED EITHER THE MAXIMUM WEIGHT OR SIZE FOR
EACH THICKNESS.
Each value shown on the Lifting Guidelines charts is for AISI 1020 steel, and 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 AISI 1020 STEEL
Reduction Factors for Materials
Other than AISI 1020 Steel
Materials
REDUCTION FACTOR
Cast Steel
0.90
3% Silicon Steel
0.80
AISI 1095 Steel
0.70
416 Stainless Steel
0.50
Cast Iron (non-chilled)
0.45
Pure Nickel
0.10
For Other Materials Consult O.S. Walker
CAUTION
If you have any diffi culty lifting a load, DON’T LIFT IT!
Call Walker for advice at 1-800-962-4638
WARNING
GUIDELINES FOR THE REDUCTION OF THE
RATED LIFTING CAPACITY
Rated lift Capacity
(For these materials) =
Reduction Factor
multiplied by
Maximum Load
Value
(For 1020 Steel) from Lifting Guidelines (plate). See pages 12, 14 & 16.
Example: Lifting AISI 1095 STEEL, ½” thick, ROUGH machined fl at surfaces (use .020” air gap)
with a Model NEO-250 magnet.
Rated Lift Capacity
= 0.70 multiplied by 160 = 112 pounds.
Rated lift Capacity
(For these materials) =
Reduction Factor
multiplied by
Maximum Load
Value
(For AISI 1020 Steel) from Lifting Guidelines (round bar & pipe). See pages 13, 15 & 17.
Example: Lifting CAST IRON, (non-chilled), 8” diameter solid round bar, CLEAN AND SMOOTH
GROUND surfaces (use 0” air gap) with a Model NEO-500 lifting magnet.
Rated Lift Capacity
= 0.45 multiplied by 38” = 17.1”.
PLATE
ROUND
BARS &
PIPES
