Broaching on a '91 VF-1

[magno_grail]

Hi, I am prototyping a motorcycle clutch basket and need to broach the slots for the plate tabs. The plan is to use Z moves with a parting tool to shave the slots with the basket on a rotary table. The problem is the spindle lock allows the spindle to rotate slightly so I need a way to hold the spindle in one position. My thought is to make a ring that will use set screws around the spindle nose (or a split ring with bolts clamping it) with a flat bar screwed to the side of it. Replace the tool holder set screw with a threaded rod that goes through the plate with nuts on either side to lock it in place after the tool is tightened.
Any better suggestions (other than taking it to a broaching shop who will not have the right broach anyway)?
Thanks

 

[MaxPrairie]

Broaching Toolholders

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CNC Broach Tools™

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Would you say the spindle rotates slightly or you are able to wiggle it by hand then returns to its orginal position? I just broached a ton of 1/4" keyways on my haas just using the orient.

 

[magno_grail]

Free to rotate a few degrees.
Aluminum basket by the way. 1/2" parting tool in a custom holder.

 

[Garwood]

Just mount your tool to the headstock, or the spindle housing, not in the spindle.

 

[Stirling]

Just mount your tool to the headstock, or the spindle housing, not in the spindle.

Ya I would agree there is likely some tapped holes on the underside you can mount to., takes the spindle out of the equation.
Or use a “accessory tool” pin that sets the location. Same was a angle head would install into your machine.
Defiantly consider a broaching tool if your going that wide in one pass.
If using the spindle I’d personally do multiple widths to put less stress on the bearings

 

[???]

Hi, I am prototyping a motorcycle clutch basket and need to broach the slots for the plate tabs. The plan is to use Z moves with a parting tool to shave the slots with the basket on a rotary table. The problem is the spindle lock allows the spindle to rotate slightly so I need a way to hold the spindle in one position. My thought is to make a ring that will use set screws around the spindle nose (or a split ring with bolts clamping it) with a flat bar screwed to the side of it. Replace the tool holder set screw with a threaded rod that goes through the plate with nuts on either side to lock it in place after the tool is tightened.
Any better suggestions (other than taking it to a broaching shop who will not have the right broach anyway)?
Thanks

If what you refer to as spindle lock is M19 there will always be some movement.

 

[magno_grail]

I planned to use several passes to cut the pocket. I have to make some lateral cuts also since the plate tabs are wider than 1/2".
I could make a plate that mounts using the spindle cartridge bolts. I already changed the spindle bearings so I am familiar with the arrangement, and it would take the load off the spindle bearings. It makes alignment with the centre of the rotary trickier.
I should have said "Orient Spindle" button on the keypad.