24
15.0
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 “A-1”. Make
your first flute at this position. Back off the index pin
and rotate the spindle until the index pin can be
inserted into hole combination “A-5”; this will be
followed by “A-9”. Succeeding flutes will be made
with the index pin in the B position: “B-3”, “B-7” and
so on
No. of Flutes
360° divided by...
Angle
Letter #
Letter #
Letter #
1 360.00
A
1
2 180.00
A
1,7
3 120.00
A
1,5,9
4 90.00
A
1,4,7,10
5 72.00
-----------------------
6 60.00
A
1,3,5,7,9,11
8* 45.00
A
1,4,7,10
9 40.00
A
1,5,9
B
3,7,11
C
1,5,9
10 36.00
-----------------------
12 30.00
A
1 to 12
15 24.00
-----------------------
16
22.50
-----------------------
18 20.00
A
1,3,5,7,9,11
B
1,3,5,7,9,11
C
1,3,5,7,9,11
20 18.00
-----------------------
24* 15.00
A
1 to 12
30 12.00
-----------------------
36 10.00
A
1 to 12
B
1 to 12
C
1 to 12
other interesting patterns....
9 ------
A
1,5,9
B
1,5,9
C
1,5,9
NOTE: A dashed line indicates that particular set of angles is not possible with the indexer.
* For 8 or 24 flutes, perform the first sequence, then rotate the workpiece by hand to the needed position and repeat
the same sequence.
