I know this is a bit off the wall but… ?I recently replaced the round leather belt on an old treadle sewing machine. Normally one would drill/punch a hole near each end and use a hog ring. I ended up poking a hole through the leather with a needle and sewing the ends together, wrapped around many times. ?I think one could do a similar thing with a flat belt. ?Advantages would be only tiny holes punched, a larger area of contact compared with hog rings, a very flexible joint and no ticking. If standard nylon thread wasn’t quite strong enough one could use nylon lacing.?
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On Dec 31, 2024, at 11:37, Mark via groups.io <mark21056@...> wrote:
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On Mon, Dec 30, 2024 at 10:11 PM, Mike Poore wrote:
You indicated that it worked well, but something was not quite right. I would be curious hearing more about the problem. Regardless, you convinced me to make one like your recent version. No point redoing the research you have already done. Quinn has a great channel. Hopefully, you get a plug.
I never figured out why the other tool failed to work well but it may have had to do with the tilt of the blade. The problematic design had no tilt (or back rake angle)?
The new design never fails but this following requirements are important:
1) Feed rate needs to be between .001" to .002" per revolution.?
2) A small amount of oil but a constant stream (use a bottle with a needle
3) The RPM need to be at or a bit below the calculated SFPM for HSS
4) Blade Stick-out needs to be 1-inch. (it affects the leverage it has on the spring)
The last one is weird. It will scream and chatter if you shorten it to 1/2". This might also have been the issue with my past design. It's counterintuitive to shorten have a lot of stick-out.?
