Powermatic PM2020 manual Indexer positions, How to use the chart

13.0Indexer 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.

									Figure 36
No. of Flutes	Angle	Letter		#	Letter		#	Letter		#	Letter	#
360° divided by...
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							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

Table 2

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

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