Choosing a Suitable Vacuum Cup
EXAIR vacuum cups are vinyl. They are ideal for general purpose applications and provide excellent resistance to wear. The Durometer rating (used to indicate the flexibility and stiffness of the cup) is A50. Temperature range is 32°F to 125°F.
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.
| Small Round | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Model | A | B | C | D | E | F | G | Tunnel | |
| 900752 | in | 1,00 | 1,12 | 0,25 | 0,81 | 0,45 | 0,17 | 1/4 NPTF | No |
| mm | 25 | 28 | 6 | 21 | 11 | 4 | |||
| 900753 | in | 1,50 | 0,90 | 0,28 | 1,25 | 1,06 | 0,12 | 1/4 NPTF | Yes |
| mm | 38 | 23 | 7 | 32 | 27 | 3 | |||
| 900754 | in | 2,00 | 1,00 | 0,25 | 1,56 | 1,31 | 0,18 | 1/4 NPTF | Yes |
| mm | 51 | 25 | 6 | 40 | 33 | 5 | |||
| 900755 | in | 2,50 | 1,80 | 0,72 | 1,35 | 0,95 | 0,62 | 1/4 NPTF | Yes |
| mm | 64 | 46 | 18 | 34 | 24 | 16 | |||
| 900756 | in | 3,50 | 1,10 | 0,56 | 0,98 | 0,51 | 0,37 | 1/4 NPTF | No |
| mm | 89 | 28 | 14 | 25 | 13 | 9 | |||
| Large Round | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Model | A | B | C | D | E | F | G | Tunnel | |
| 900757 | in | 3,25 | 1,15 | 0,50 | 2,23 | 1,87 | 0,37 | 3/8 NPTF | Yes |
| mm | 83 | 29 | 13 | 57 | 47 | 9 | |||
| 900758 | in | 3,25 | 1,15 | 0,50 | 2,23 | 1,87 | 0,37 | 1/4 NPTF | Yes |
| mm | 83 | 29 | 13 | 57 | 47 | 9 | |||
| 900759 | in | 4,25 | 1,18 | 0,50 | 2,75 | 2,43 | 0,37 | 3/8 NPTF | Yes |
| mm | 108 | 30 | 13 | 70 | 62 | 9 | |||
| 900760 | in | 5,00 | 1,75 | 1,12 | 3,25 | 2,65 | 0,62 | 3/8 NPTF | Yes |
| mm | 127 | 44 | 28 | 83 | 67 | 16 | |||
| 900761 | in | 6,00 | 1,31 | 0,50 | 4,75 | 4,90 | 0,12 | 1/4 NPTF | Yes |
| mm | 152 | 33 | 13 | 121 | 124 | 3 | |||
Oval Cups provide the most vacuum due to the larger surface area. 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.
| Oval | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Model | A | B | C | D | E | F | G | H | Tunnel | |
| 900762 | in | 1,00 | 1,06 | 0,12 | 0,81 | 0,76 | 0,09 | 0,50 | 1/8 MNPT | No |
| mm | 25 | 27 | 3 | 21 | 19 | 2 | 13 | |||
| 900763 | in | 2,00 | 1,06 | 0,12 | 1,81 | 1,76 | 0,09 | 0,50 | 1/8 MNPT | No |
| mm | 51 | 27 | 3 | 46 | 45 | 2 | 13 | |||
| 900764 | in | 1,73 | 1,03 | 0,21 | 1,35 | 1,21 | 0,09 | 0,87 | 1/8 MNPT | Yes |
| mm | 44 | 26 | 5 | 34 | 31 | 2 | 22 | |||
| 900765 | in | 2,96 | 0,93 | 0,19 | 0,92 | 2,34 | 0,20 | 1,47 | 1/8 FNPT | No |
| mm | 75 | 24 | 5 | 23 | 59 | 5 | 37 | |||
Bellows Cups are best suited to textured, uneven surfaces. 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.
| Bellows Cups | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Model | A | B | C | D | E | F | G | H | Tunnel | |
| 900766 | in | 0,73 | 1,43 | 0,75 | 0,67 | 0,45 | 0,79 | 3 | 1/4 FNPT | No |
| mm | 19 | 36 | 19 | 17 | 11 | 20 | ||||
| 900767 | in | 1,00 | 1,48 | 0,85 | 0,56 | 0,44 | 0,85 | 4 | 1/8 FNPT | No |
| mm | 25 | 38 | 22 | 14 | 11 | 22 | ||||
| 900768 | in | 1,50 | 1,12 | 0,71 | 1,06 | 1,00 | 0,31 | 1 | 1/4 FNPT | Yes |
| mm | 38 | 28 | 18 | 27 | 25 | 8 | ||||
| 900769 | in | 2,00 | 1,54 | 0,89 | 1,00 | 1,17 | 0,68 | 1 | 1/4 FNPT | Yes |
| mm | 51 | 39 | 23 | 25 | 30 | 17 | ||||
| 900770 | in | 2,50 | 2,40 | 1,75 | 1,00 | 1,12 | 1,80 | 2 | 1/4 FNPT | No |
| mm | 64 | 61 | 44 | 25 | 28 | 46 | ||||
| 900771 | in | 3,25 | 3,00 | 2,20 | 1,00 | 1,53 | 2,00 | 2 | 3/8 FNPT | No |
| mm | 83 | 76 | 56 | 25 | 39 | 51 | ||||
Vacuum Cup Selection
To select a vacuum cup for your application, you need to know:
- The weight of the item being lifted
- If the item to be lifted is porous or non-porous.
- The safety factor
A safety factor or 2 is recommended when the vacuum cup is positioned horizantally.
A safety factor of 4 is recommended when the vacuum cup is positioned vertically.
Some companies or local codes may required a specific safety factor.
| 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 | |
| Lip Diameter of Vacuum Cup in cm2 | 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 in “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 kilogram 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 | |
| Lip Diameter of Vacuum Cup in cm2 | 3 | 5 | 6 | 10 | 11 | 20 | 28 | 32 | 54 | 92 | 127 | 182 | |
| Vacuum in 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 | |