rwilliams
Aluminum
- Joined
- Sep 5, 2004
- Location
- Bryant, Arkansas
I just got a Pratt and Whitney M-1803 dividing head with tailstock and some good collets, no gears, arms/quadrants or dead center. Hopefully I can get some information to make some pieces, as I need them, to compete the kit over time.
Is there a manual that shows its care, feeding and parts/disassembly? If anyone has one, can I get a copy? My dividing head is quite stiff, probably congealed lubricant. I don’t want to force anything, I have an amazing ability to break things.
,
If anyone has the arms/quadrant and the dead center assembly can I get a sketch with critical dimensions? From the pictures I have seen, it appears the dead center assembly is a shaft, likely 1/2” diameter at least on the tail end, through a collet shaped sleeve, maybe with some sort of thrust bearing and bronze bushings in the sleeve.
From the threads I have found, I believe the change gears are 24DP, 3/8” thick and have a 1/2” hole with a 1/16” keyway, is that correct, and is it a single keyway?
Due to my head’s stiffness, I can not figure out what the collar behind the hole plate locks/disengages and when it is clamped or loose.
Probably related to the above question, how does the input shaft (via, a mounted gear) turn the gear train to rotate the collet/chuck?
Also, how is the spindle play adjusted, in my case loosened?
I will post some pictures, as I can, of disassembly as I clean and adjust.
Thanks,
Bob
Is there a manual that shows its care, feeding and parts/disassembly? If anyone has one, can I get a copy? My dividing head is quite stiff, probably congealed lubricant. I don’t want to force anything, I have an amazing ability to break things.
,
If anyone has the arms/quadrant and the dead center assembly can I get a sketch with critical dimensions? From the pictures I have seen, it appears the dead center assembly is a shaft, likely 1/2” diameter at least on the tail end, through a collet shaped sleeve, maybe with some sort of thrust bearing and bronze bushings in the sleeve.
From the threads I have found, I believe the change gears are 24DP, 3/8” thick and have a 1/2” hole with a 1/16” keyway, is that correct, and is it a single keyway?
Due to my head’s stiffness, I can not figure out what the collar behind the hole plate locks/disengages and when it is clamped or loose.
Probably related to the above question, how does the input shaft (via, a mounted gear) turn the gear train to rotate the collet/chuck?
Also, how is the spindle play adjusted, in my case loosened?
I will post some pictures, as I can, of disassembly as I clean and adjust.
Thanks,
Bob