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Choose the right vacuum cup for your application

Vacuum Products | ACU Index, How Vacuum Cups Work, Cup Usage, and Safety Factor

Application, Characteristics, and Usage (ACU) Index

Determining the type and durometer of vacuum cup appropriate for LESS MORE
60
60
60 DUROMETER
a particular application is typically based on three criteria. PART SURFACE OILY/SLICK LESS MORE
CONTOUR
• How oily or slick the part surface is. 60 LESS MORE
• How much contour or curvature the part has. CUP LONGEVITY
• How long you can expect the cup to last (Longevity)?
A set of vacuum cups of the same size and type, each having different durometers may handle oily/slick or
contoured parts differently. However, cup longevity of each may be affected as a result of durometer, appli-
cation and usage. The ACU Index is a reference shown with each type of vacuum cup and is used to illustrate
the differences between vacuum cup types and durometers, when considering the above criteria. Pressure (Absolute)
.35 bar [5 psi]

How Vacuum Cups work Panel
Pressure (Absolute)
A panel adheres to a vacuum cup because the surrounding pres- .35 bar [5 psi]
sure (atmospheric pressure) is greater than the pressure inside Atmospheric (Absolute) Pressure
the vacuum cup. The greater pressure pushes the panel onto the Panel 1.03 bar [15 psi]
cup.
To create the low pressure in the vacuum cup, it is connected to
a vacuum generator. The lower the pressure (higher vacuum) in- Atmospheric (Absolute) Pressure
Pressure (Absolute)
side the cup; the greater the lifting force of the suction cup. 1.03 bar [15 psi]
.35 bar [5 psi]
Panel
Vacuum Cup Usage

Atmospheric (Absolute) Pressure
It is important to use the proper size and quantity of vacuum cups needed Formula 1.03 bar [15 psi]
for your application. There are five steps which will help you make sure
your application has the appropriate vacuum cup usage. n = w x s
Step 1: Determine application and find appropriate cup family type. f
Formula w =Weight of Panel
Step 2: Determine panel weight. w x s f = Lifting force of cup

Step 3: Find maximum cup size based on panel contour and shape. n = s = Safety factor
f Formula Number of cups
n =
Step 4: Find the appropriate cup size lifting capacity in the chart, found w x s
w =Weight of Panel
n =
Weight and lifting force
on the catalog page featuring the cup family type chosen. f = Lifting force of cup f
must be in the same units,
s = Safety factor
Step 5: Determine safety factor determined on application (See Below). w =Weight of Panel
either English or Metric.
f = Lifting force of cup
n = Number of cups
Use the formula on the right to determine the proper amount of cups needed s = Safety factor
n = Number of cups
to move your panel. Weight and lifting force
Weight and lifting force
must be in the same units,
must be in the same units,
either English or Metric.
either English or Metric.
Safety Factor Starting with Ideal conditions (2),
add each additional conditions Relative Cup Motion
Ideal plant conditions*: (2) to determine total safety factor.
Fast moving robot: (+1) For example: Panel VERTICAL
Slick or Oily Panel: (+1) Ideal conditions: 2
Flexing Panel: (+2) Fast moving robots: +1 Panel VERTICAL
Small cups: (+1) Flexing Panel: +2
High Horizontal Loads: (+1) Total Safety Factor 5 Panel VERTICAL
Panel
HORIZONTAL
(*)Ideal conditions are defined as having no surface, operational, or environmental Panel HORIZONTAL
conditions which could adversely effect the performance to the vacuum cup.
Panel
HORIZONTAL
EE-VAC-5 Dimensions and technical information are subject to change without notice