Indexing mechanisms GN 200 replace and simplify complicated indexing and safety mechanisms. An excellent choice for corrosion-free environments.
Besides the standard scale (Type AS) the control knob version may be supplied with any scale. In such cases, it is recommended to use the matte chrome plated version since the color contrast is better.
Regarding design, numbering position and numbering sequence of the scale please see the layout for scale rings on the order sheet “How to Order Graduations“.
Body
Stainless steelNI AISI 303
Type AS:
Control knob
Keyway P9 DIN 6885
for bore K 10
Keyway P9 DIN 6885 Page 2
for bores > K 10
RoHS
Special graduations, see “How to Order Graduations“
| A | Without scale |
| AS | With scale 0...50, 60 graduations |
| d1 | d2 H7 Bore with keyway | d3 | d5 | d6 P.C.D. for mounting screws | l1 | l2 | l3 Bore length | w Stroke |
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|---|---|---|---|---|---|---|---|---|---|---|
| 1.73 | K 10 | K 12 | - | 1.30 | 0.91 | 1.30 | 1.46 | 0.24 | 1.22 | 0.16 |
| 2.05 | K 12 | K 14 | K 16 | 1.65 | 1.24 | 1.65 | 1.48 | 0.24 | 1.24 | 0.16 |
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Indexing mechanisms can be used to adjust shafts or spindles by an angle of rotation of 6° (or a multiple thereof) and subsequently secure them against rotation by engaging in a serration. |
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The indexing mechanism is a selfcontained unit with all adjustment and securing elements accommodated in the smallest possible space. It consists of three main parts:
When locked, the internal toothing of the knurled hub (60 teeth) simultaneously engages with the external toothing of both the fixed location ring and the bushing connected to the shaft. To adjust the shaft, the knurled hub is pulled against spring pressure, disengaging from the location ring. The knurled hub however remains positively connected with the shaft via the external toothing of the bushing. By turning the knurled hub the shaft can now be adjusted. |
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With 60 teeth, the following divisions can be achieved: 2, 3, 4, 5, 6, 10, 20, 30. A simple method provides indexing of the shaft to a limited number of positions only, i.e. every 120°. For this purpose, the location ring is provided with a dowel pin that allows engagement in the serration only if it meets a counterbore in the knurled hub. This counterbore can be manufactured oversize as the dowel is for rough positioning only. Accurate positioning and load capacity is maintained via the engaged teeth. For adjustment with a threaded spindle, it is recommended to assign the the 1.5 mm thread pitch to the standard scale with 60 graduation marks (Type AS): 1 graduation = 0.025 mm. The serration ensures more accurate and wear-free indexing than individual dowel pins. If a very high torque has to be overcome during adjustment, unlocking and locking is more difficult due to the low backlash respectively the friction in the tooth flanks. In this case, it is recommended to use indexing levers GN 215. |
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Information |
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The size of numbers and length of graduations depend on the number of graduations, quantity of numbers and the scale ring diameter. |
| Min | Max | Price |
|---|---|---|
| 1 | 24 | $168.25 |
| 25 | 49 | $154.23 |
| 50 | 99 | $140.21 |
| ≥ 100 | $126.18 |
Our service team is available from Monday to Friday between 7:30 AM and 5:00 PM Central Time: 800-877-8351
