Powermatic 3520B User Manual download pdf (Page 28)

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

360° divided by...

Angle Letter # Letter # Letter # Letter #

1 360.00 A

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 D 2,5,8,11

9 40.00 A 1,5,9 B 2,6,10 C 4,8,12

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 2,4,6,8,10,12 C 2,4,6,8,10,12

20 18.00 -----------------------

24 15.00 A 1 to 12 D 1 to 12

30 12.00 -----------------------

36 10.00 A 1 to 12 B 1 to 12 C 1 to 12

other interesting patterns....

18 20.00 A 1,3,5,7,9,11 B 1,3,5,7,9,11 C 1,3,5,7,9,11

NOTE: A dashed line indicates that particular set of angles is not possible with the indexer.

Figure 39

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 43 44

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Powermatic 3520B User Manual Page 28