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Vacuum Generators

Vacuum Cups for E-VacChoosing A Suitable Vacuum Cup

Round Cups are best suited to smooth, flat surfaces. They
will grip and release quickly. These cups hold their shape
with extended use and grip well to vertical surfaces. Round
cups with cleats are better at lifting heavy loads. Cups
without cleats can be used for light lifting.


Vacuum Cup - Oval

Oval Cups provide the most vacuum due to the larger surface
area that contacts the part. They provide more vacuum
power than round cups and are suited to lifting heavy
loads. They are designed to handle flat rigid sheet
materials like wood, glass, cardboard boxes and
composites.

Bellows Cups are best suited to textured, uneven surfaces.
Vacuum Cup - Bellows The folds, called convolutions, provide a collapsible area that
allows the cup to quickly compress when it touches the flat
surface. The attach and release time is greater due to the
significant volume of the cup.

Vacuum Cup Selection

To select a vacuum cup for your application, you need to know:

  • The weight of item being lifted
  • If the item to be lifted is porous or non-porous
  • The safety factor

A safety factor of 2 is recommended when the vacuum cup is positioned horizontally.

A safety factor of 4 is recommended when the vacuum cup is positioned vertically.

Some companies or local codes may require a specific safety factor.

E-Vac Vacuum GeneratorsUsing The Tables Below
Determine the weight of the part to be lifted. Multiply it by the safety factor of (2) when the cup will be positioned horizontally, or by (4) when positioned vertically.

Using the table below, look through the numbers highlighted in orange for the weight capacity per vacuum cup. Use enough vacuum cups to distribute the weight evenly for stable lifting and placement. The model number(s) for the vacuum cup(s) that can handle that weight are directly above (in that column) and are highlighted in blue. Details for each vacuum cup can be found on Vacuum Cup Dimensions.

To the left of the vacuum cup weight you’ve selected (in that same row) is the vacuum level highlighted in green that is needed. Performance data for the In-Line E-Vacs designed for specific vacuum levels can be found here. For loads that vary, Adjustable E-Vacs are the best choice (performance shown here).

Weight in lbs that a vacuum cup can hold at a given pressure
Vacuum Cup Models 900762 900766 900752 900767 900763 900764 900753 900768 900754 900769 900765 900755 900770 900756 900757 900758 900771 900759 900760 900761
Area of cup in2 0.4 0.8 1.0 1.5 1.8 3.1 4.4 4.9 8.3 14.2 19.6 28.3
Vacuum "Hg 5 0.5 1.0 1.2 1.8 2.2 3.9 5.3 6.0 10.2 17.4 24.1 34.7
10 1.0 1.9 2.5 3.7 4.3 7.7 10.7 12.1 20.4 34.8 48.2 69.4
15 1.5 2.9 3.7 5.5 6.5 11.6 16.0 18.1 30.6 52.3 72.3 104.2
20 2.1 3.9 4.9 7.4 8.7 15.4 21.4 24.1 40.7 69.7 96.4 138.9
21 2.2 4.1 5.2 7.8 9.1 16.2 22.4 25.3 42.8 73.2 101.3 145.8
27 2.8 5.2 6.6 10.0 11.7 20.8 28.9 32.6 55.0 94.1 130.2 187.5

Weight in kilograms that a vacuum cup can hold at a given pressure
Vacuum Cup Models 900762 900766 900752 900767 900763 900764 900753 900768 900754 900769 900765 900755 900770 900756 900757 900758 900771 900759 900760 900761
Area of cup cm2 3 5 6 10 11 20 28 32 54 92 127 182
Vacuum kPa 17 0.2 0.4 0.6 0.8 1.0 1.7 2.4 2.7 4.6 7.9 10.9 15.7
34 0.5 0.9 1.1 1.7 2.0 3.5 4.8 5.5 9.2 15.8 21.9 31.5
51 0.7 1.3 1.7 2.5 3.0 5.2 7.3 8.2 13.9 23.7 32.8 47.2
68 0.9 1.7 2.2 3.4 3.9 7.0 9.7 10.9 18.5 31.6 43.7 63.0
71 1.0 1.8 2.3 3.5 4.1 7.3 10.2 11.5 19.4 33.2 45.9 66.1
91 1.3 2.4 3.0 4.5 5.3 9.4 13.1 14.8 25.0 42.7 59.1 85.0


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