Indexer Positions, How to use the chart

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.

JWL-1442VS specifications

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