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Indexer Positions
How to use the chart
The indexer is shown as viewed from the
tailstock end of the Lathe. Points A, B, C and D
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-2", "B-6" and so
on.
No. of Flutes
Angle
360° divided by...
1
360.00
2
180.00
3
120.00
4
90.00
5
72.00
6
60.00
8
45.00
9
40.00
10
36.00
12
30.00
15
24.00
16
22.50
18
20.00
20
18.00
24
15.00
30
12.00
36
10.00
other interesting patterns....
18
20.00
NOTE: A dashed line indicates that particular set of angles is not possible with the indexer.
Letter
#
Letter
A
1
A
1,7
A
1,5,9
A
1,4,7,10
-----------------------
A
1,3,5,7,9,11
A
1,4,7,10
A
1,5,9
B
-----------------------
A
1 to 12
-----------------------
-----------------------
A
1,3,5,7,9,11
B
2,4,6,8,10,12
-----------------------
A
1 to 12
-----------------------
A
1 to 12
B
A
1,3,5,7,9,11
B
1,3,5,7,9,11
Figure 39
28
#
Letter
#
2,6,10
C
4,8,12
C
2,4,6,8,10,12
1 to 12
C
1 to 12
C
1,3,5,7,9,11
Letter
#
D
2,5,8,11
D
1 to 12
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