|geoff rimmer||18/04/2021 22:36:17|
|9 forum posts|
im in the process of making a 24 stop dividing head thingy, (dont know what theyre are called), its a 5" chuck mounted to revolve on a heavy angle plate to be used vertical or horizontal, behind the chuck is a flange with 24 tapered slots cut into which a tapered stop locates, tapered milling cutters are big bucks so im looking for alternatives to buying one? any ideas??
|David George 1||18/04/2021 22:43:58|
1572 forum posts
How are you cutting the slots. If you cut them on a dividing head you can rough them out square firstly, then offset the cutter and rotate the plate by a few degrees and cut the first set of side angles. Repeat the operation but opposite offset and angle to complete the angled slots for plunger.
|2047 forum posts|
Consider cutting parallel slots but use a tapered plunger key to index in the slot, even with the tapered slots and key it is best to lock the spindle to mill the part being held.
|Paul Kemp||18/04/2021 23:37:07|
|642 forum posts|
Use a cheap gear cutter? That will give you a nice slot! Grind up a suitable single point tool and 'fly cut'? I think it's a spin indexer by the way.
Edited By Paul Kemp on 18/04/2021 23:40:25
|Pete Rimmer||18/04/2021 23:40:56|
|979 forum posts|
The plate with the slots is called a masking plate. Used for rapid indexing.
|John Haine||19/04/2021 07:30:03|
|3872 forum posts|
Why slots? Drill parallel sides holes and have tapered pin.
|old mart||19/04/2021 19:19:16|
|3067 forum posts|
I wanted to make some special tee nuts for the compound on the Smart & Brown model A and a friend of the museum who did cutter grinding put the required taper on the end of a 1/2" four flute endmill. If you have a suitable donor cutter, then a small engineering firm could probably modify one for you cheaper than a special.
Emgee's suggestion of parallel slots with a tapered plunger would work very well if the plunger included angle was about 2 degrees.
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