Subject:
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Re: Force, strenght, did anyone ever measure?
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Newsgroups:
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lugnet.build, lugnet.technic
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Date:
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Thu, 18 Jan 2001 02:51:40 GMT
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Viewed:
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580 times
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If you can, use a worm to drive the rack; you'll be better off. It'll
take more load and if some of the other stages in your gear train break or
slip (You'll want to have a belt stage in there somewhere so you won't break
things anyway), the rack won't fall.
If you can't use a worm, then try the next bigger gear size (16 tooth ?)
The 8 tooth gears are *VERY* weak because, in gear terminology, the flanks
of the teeth are undercut. This happens when a relatively large pitch is
used on a small pinion. They won't take shock loads or fully reversing
fatigue loads for very long. Ideally TLC could have used a finer pitch for
the smaller gears, but that would have made them less interchangeable : (
That being said, I've abused those pinions in the past (No idea what the
actual tooth loads were though) and I've only broken a few of them in 20+
years of building crazy things out of technics pieces. I have tons of them
so I've never been afraid to break them when experimenting either...
HTH,
Xanthra47
"Duq" <Duq@nlgateway.net> wrote in message news:G7A5B2.7oq@lugnet.com...
> Hi all,
>
> I'm running into trouble with my mobile crane project. The boom is pretty
> heavy. I want to raise it with a rack/pinion, but I wonder how much force
> they can take? I reckon that for the first bit up the horizontal force • will
> be around 50N. Does anyone ever measure how much a well braced double
> rack/pinion (8t gears) can take?
>
> Duq
>
>
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Message is in Reply To:
 | | Force, strenght, did anyone ever measure?
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| Hi all, I'm running into trouble with my mobile crane project. The boom is pretty heavy. I want to raise it with a rack/pinion, but I wonder how much force they can take? I reckon that for the first bit up the horizontal force will be around 50N. (...) (24 years ago, 16-Jan-01, to lugnet.build, lugnet.technic)
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