Indexer Positions
How to use the chart
A diagram of the indexer is shown at right, as viewed from the tailstock end of the Lathe. Points A, B and C are the holes in the head casting. The holes in the spindle collar may be considered as numbered 1 through 12.
Example: You wish to rout 9 flutes on your spindle blank. Locate the “9” in the “No. of Flutes” column; each flute angle will be 40°. The index pin should first be inserted into hole combination
No. of Flutes |
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360° divided by... | Angle | Letter | # |
| Letter | # | Letter | # |
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1 | 360.00 | A | 1 |
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2 | 180.00 | A | 1,7 |
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3 | 120.00 | A | 1,5,9 |
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4 | 90.00 | A | 1,4,7,10 |
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5 | 72.00 |
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6 | 60.00 | A | 1,3,5,7,9,11 |
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8 | 45.00 | A | 1,4,7,10 |
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9 | 40.00 | A | 1,5,9 | B |
| 3,7,11 | C | 1,5,9 |
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10 | 36.00 |
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12 | 30.00 | A | 1 to 12 |
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15 | 24.00 |
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16 | 22.50 |
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18 | 20.00 | A | 1,3,5,7,9,11 | B | 1,3,5,7,9,11 | C | 1,3,5,7,9,11 | |
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20 | 18.00 |
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24 | 15.00 | A | 1 to 12 |
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30 | 12.00 |
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36 | 10.00 | A | 1 to 12 | B |
| 1 to 12 | C | 1 to 12 |
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other interesting patterns.... |
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9 | A | 1,5,9 | B |
| 1,5,9 | C | 1,5,9 | |
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NOTE: A dashed line indicates that particular set of angles is not possible with the indexer.
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