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Vacuum
Cup Materials Information and Product Specifications
| Chloroprene
(C): |
Good
wear resistance properties, 0-zone, -40º to
230ºF (-40º to 110ºC) |
| Polyurethane
(P): |
Best
wear resistance, super long life, oil resistant,
-58º to 248ºF (-50º to 120ºC) |
| Nitril Ruber (N): |
Good wear resistance
properties, oil resistant, -20º to 225ºF (-50º to
120ºC) |
| Silicon (S): |
Soft Material, especially good for
rough/textured surfaces, -86º to 392ºF (-65º to 200ºC) |
| Viton (V): |
High resistance against compression
and tension, -23º to 446ºF (-30º to 230ºC) |
| Polyurethane
(Pu): |
Soft
polyurethane, best on textured surfaces, good
wear resistance, oil resistant, -68º to 167ºF
(-55º to 75ºC) |
| Duel
Durometer Polyurethane (DDP): |
Soft
seal with stiffer base, best on textured
surfaces with high vacuum levels, good wear and
oil resistance, -50º to 122ºF (10º to 50ºC) |
Lifting
Capacity
The lifting capacity of a vacuum cup can be
theoretically determined at sea level by using
the following formula:
C=.393xD2xV
N
C= Lifting Capacity (lbs.)
D=Cup Diameter (in.)
V=Vacuum Level (in Hg)
N=Desired Safety Factor |
Safety
factor for horizontal lifting applications
should be at least (2). Vertical lifting
applications should have a safety factor
of at least (4).
NOTE: This
formula will give theoretical lifting
capacity only. Actual lifting capacity
should always be verified by user. |
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Sizing
Vacuum Cups
When sizing cups there are three crucial factors
to consider. These are vacuum level, number of
cups, and the desired safety factor. Cup
diameter can be determined by using the
following formula:
 |
D=Diameter
of vacuum cup (in.)
M=Mass of lifting product (lbs.)
V=Vacuum Level (in Hg)
N=Safety Factor
U=Number of Cups |
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To learn more about
vacuum cup selection, read "Vacuum
System Overview - Vacuum Cups" by John
Westbeld, Design Manager, >SAS< Autonmation,
LLC
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get a grip! Vacuum Cups
