I have been making some replacement ACME followers for lathes and using SAE 660 bronze. All I can find it in is round stock and I end up wasting a lot. All I have been able find in rectangular stock is Oil-impregnated - any reason not to use that for the ACME nuts?
Thanks, Wally
Nobody else has commented yet, so I'll throw in my two pennorth.
Oilite will wear more quickly than solid bronze and will be weaker. On the other hand, it may well work a lot better than solid bronze due to the marginal lubrication that half-nuts receive.
It would be very interesting to see some results of comparisons.
Mark Rand RTFM
The proper bronze will itself be slippery. This way the friction is kept low in marginal lubrication situations. Oilite counts on an oil film to prevent wear and keep friction low. I don't know what alloy oilite is but when it dries out it tends to really score the shaft. But the scoring could be from particles coming loose from the sintered bearing. ERS
=============== This may be a situation where technology has actually progressed. The teflon filled epoxy type compounds are both very slippery and very strong. It may be better to build up an existing half/split nut rather than machining a complete new one.
I don't know what the costs are but Moglice sells a repair kit with all the materials you need including the degreaser, release agent, and moglice compounds.
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Have any of the people in the group use Moglice? Anyone repaired a half-nut with Moglice or something similar?
How about non-metalic materials such as delrin, nylon, etc. ? If it works in worm gears it should be OK for a half/split nut. Anyone tried this?
Unka' George (George McDuffee) .............................. Only in Britain could it be thought a defect to be "too clever by half." The probability is that too many people are too stupid by three-quarters.
John Major (b. 1943), British Conservative politician, prime minister. Quoted in: Observer (London, 7 July 1991).
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