for precision locating
GN 817.3 Indexing plungers
| Type B without rest position | Type C with rest position |
| d1 Plunger h7 | l1 | l2 Stroke | l3 | b | d2 | d3 | d4 | k | l4 | l5 | l6 | Spring load initial | N ~ end |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 8 | 20 | 10 | 10 | 16 | 28 | 5,5 | 38 | 26 | 51 | 8 | 27 | 8,5 | 28 |
| 8 | 22 | 10 | 12 | 16 | 28 | 5,5 | 38 | 26 | 51 | 8 | 27 | 8,5 | 28 |
| 8 | 26 | 10 | 16 | 16 | 28 | 5,5 | 38 | 26 | 51 | 8 | 27 | 8,5 | 28 |
| 8 | 30 | 10 | 20 | 16 | 28 | 5,5 | 38 | 26 | 51 | 8 | 27 | 8,5 | 28 |
| 10 | 22 | 12 | 10 | 16 | 28 | 5,5 | 38 | 26 | 51 | 8 | 27 | 9,5 | 38 |
| 10 | 24 | 12 | 12 | 16 | 28 | 5,5 | 38 | 26 | 51 | 8 | 27 | 9,5 | 38 |
| 10 | 28 | 12 | 16 | 16 | 28 | 5,5 | 38 | 26 | 51 | 8 | 27 | 9,5 | 38 |
| 10 | 32 | 12 | 20 | 16 | 28 | 5,5 | 38 | 26 | 51 | 8 | 27 | 9,5 | 38 |
Specification
Steel
blackened
Plunger
hardened and ground
Knob Plastic
Technopolymer (Polyamide PA)
black, matt
not removable
Information
Indexing plungers GN 817.3 have been deve-loped to enable precise locating when guide bushes GN 770 are used.
For this purpose as a rule, as a plain guide bush (Type A), is used whereby the dimension l3 of the plunger determines the length of the bush.
The precise location is, therefore, not depen-dent on the guide pin in the plunger, but on the accuracy of the guide bush (bore tolerance G6) and the plunger (tolerance h7). Both compo-nents are hardened and ground. It goes without saying that the bush length also influences the accuracy of the positioning.
Type C with rest position is used in such appli-cations where the plunger must not protrude continually. In that case the knob is retracted and afterwards turned by 90°. A notch is provi-ded for the key to prevent the plunger from turning by error or vibration.
How to order
Indexing plunger
GN 817.3-10-24-C
Code No.
817.3
d1
10
l1
24
Type
C