Wood’s Powr-Grip MRT49DC2 - Manual (Page 15)

Rev 0.5/4-14 13 MRT4-DC2: #35071
INTENDED USE
L
OAD
C
HARACTERISTICS
This lifter is NOT intended for lifting hazardous materials, such as explosives or
radioactive substances.
The operator must verify that the lifter is intended to handle each load, in accordance with the
following requirements:
• The load weight must not exceed the Maximum Load Capacity (see SPECIFICATIONS).
• The load must be a single piece of nonporous or semiporous material with a flat and
relatively smooth contact surface. 3 To determine whether the load is too porous or rough,
perform the test under Vacuum Level on Other Surfaces (see OPERATION: T
O
A
PPLY THE
P
ADS TO
A
L
OAD
).
• The load's contact surface must be suitable for obtaining a friction coefficient of 1 with the
lifter's vacuum pads (see MAINTENANCE: V
ACUUM
P
AD
M
AINTENANCE
: Pad to Load Friction
Coefficient).
• In order to avoid damaging the vacuum pads, the load's surface temperature must not
exceed the Operating Temperatures (see SPECIFICATIONS). 4
• The load's minimum length and width are determined by the Pad Spread (see
SPECIFICATIONS).
• The load's maximum length and width are determined by the allowable overhang, or the
amount of load material that can extend sideways beyond the vacuum pads without breaking or
otherwise being damaged.
5
• 1" [2.5 cm] is the maximum allowable thickness of loads at the Maximum Load Capacity
(see SPECIFICATIONS). 6
Note: Standard vacuum pads can stain or deform load surfaces with light colors or soft coatings.
Test such surfaces for detrimental effects before using the lifter on them. Alternative rubber
compounds are available for these applications; contact Wood’s Powr-Grip or an authorized
dealer for more information.
3
Lifters that feature concave vacuum pads can also attach to some kinds of curved loads. Since curvature affects the lifting
capacity, contact Wood’s Powr-Grip for help in determining the effective lifting capacity for a particular curved load.
4
If such an application cannot be avoided, Wood's Powr-Grip does offer a heat-resistant rubber compound and other solutions
which may enable you to lift loads with higher surface temperatures. Contact Wood’s Powr-Grip or an authorized dealer for more
information.
5
The allowable overhang depends on the kind of load material being lifted, the thickness of the material, and the angle at which
it is handled (if any). Since materials such as glass, stone or sheet metal each have different physical properties, the allowable
overhang must be evaluated separately for each type of load. If necessary, contact Wood’s Powr-Grip or an authorized dealer for
help in determining the recommended overhang in a specific situation.
6
Note that allowable thickness increases as load weight decreases. If necessary, contact Wood’s Powr-Grip for help in
determining the maximum thickness permitted when handling any specific load.