Technical datasheet
GN 918-GVBEccentric Cams
Screw from the Back
Steel, Radial Clamping, with Threaded Bolt, Screw from the Operator‘s side, Screw from the Back
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Catalogue
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d1 -0.5
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l1 max.
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d2
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d3
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d4 h9
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d5
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d6
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h1
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h2
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h4 ≈
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h5
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h6 -0.1
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GN 918-40-GVB-L-12
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40
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12
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-40-GVB-L-22
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40
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22
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-40-GVB-L-27
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40
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27
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-40-GVB-L-32
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40
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32
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-40-GVB-L-37
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40
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37
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-40-GVB-L-42
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40
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42
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-40-GVB-L-47
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40
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47
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-40-GVB-L-57
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40
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57
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-40-GVB-L-62
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40
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62
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-40-GVB-L-67
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40
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67
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-40-GVB-L-77
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40
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77
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-40-GVB-L-82
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40
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82
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M 6
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25
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9
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12
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20
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10
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30.5
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55
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31
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2.5
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GN 918-50-GVB-L-10
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50
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10
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M 8
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30
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11
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16
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24
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12
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34.5
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62
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36
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2.5
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GN 918-50-GVB-L-20
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50
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20
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M 8
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30
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11
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16
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24
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12
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34.5
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62
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36
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2.5
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GN 918-50-GVB-L-30
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50
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30
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M 8
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30
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11
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16
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24
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12
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34.5
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62
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36
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2.5
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GN 918-50-GVB-L-40
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50
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40
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M 8
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30
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11
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16
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24
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12
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34.5
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62
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36
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2.5
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GN 918-50-GVB-L-50
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50
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50
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M 8
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30
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11
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16
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24
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12
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34.5
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62
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36
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2.5
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GN 918-50-GVB-L-60
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50
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60
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M 8
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30
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11
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16
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24
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12
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34.5
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62
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36
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2.5
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GN 918-50-GVB-L-70
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50
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70
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M 8
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30
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11
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16
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24
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12
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34.5
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62
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36
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2.5
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GN 918-50-GVB-L-80
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50
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80
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M 8
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30
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11
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16
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24
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12
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34.5
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62
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36
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2.5
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GN 918-50-GVB-L-90
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50
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90
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M 8
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30
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11
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16
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24
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12
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34.5
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62
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36
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2.5
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GN 918-50-GVB-L-100
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50
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100
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M 8
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30
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11
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16
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24
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12
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34.5
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62
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36
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2.5
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Types
- Type KV / KVS / KVB: With ball lever, angular (serration)
- Type GV / GVS / GVB: With ball lever, straight (serration)
- Type SK / SKS / SKB: With hex
Clamping direction
- Type R: By clockwise rotation (drawn version)
- Type L: By anti-clockwise rotation
Steel
Version with Threaded Bolt
- Eccentric cam and thrust washer
- Case-hardened
- Threaded bolt nitrided
- Property class 8.8
- Lever blackened
Version with Screw from the Operator‘s Side
- Eccentric cam, guide bushing and thrust washer
- Case-hardened
- Socket cap screw DIN 912-12.9
Lever blackened
Version with Screw from the Back
- Eccentric cam, threaded bushing and thrust washer
- Case-hardened
- Socket cap screw DIN 912-12.9
- Washer tempered
- Lever blackened
Ball knob DIN 319
Plastic, Duroplast
Black, shiny finish
Eccentric cams GN 918 allow the rapid and secure clamping and releasing at a relatively large clamping range and with high clamping force. The cam offers the advantage that the clamping force remains constant in every angular and is self-locking at the same time. The ball levers of types KV / KVS / KVB and GV / GVS / GVB feature a positive connection with the eccentric cam by means of a serration. During assembly, the position of the lever can thus be fixed in a position that is favorable for clamping.
Version with Threaded Bolt
The use of the thrust washer eliminates the need for special requirements on the execution of the threaded hole, so that it can also be mounted on tables with T-slots, for example.
Version with Screw from the Operator‘s Side
Fastening via screw from the operator’s side bridges a larger clamping range. A sufficiently large screw-in depth t is necessary to safely absorb the screw forces. The centering step of the thrust washer provides protection from impermissible lateral forces on the socket cap screw.
Version with Screw from the Back
Fastening the screw from the back allows the use, if there is no thread in the surrounding structure. The heavy duty washer absorbs and transfers the resulting screw forces. The centering step of the thrust washer provides protection from impermissible lateral forces on the socket cap screw.
Related products
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GN 918.1-KV
Clamping Bolts
Steel, Upward Clamping, with Threaded Bolt, Screw from the Operator‘s side, Screw from the Back
GN 918.2-KV
Clamping Bolts
Steel, Downward Clamping, with Threaded Bolt, Screw from the Operator‘s side, Screw from the Back
GN 919
Hubs with Eccentrical Cam
Steel