help with a thread
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@Leggy said in help with a thread:
I'm making progress.
OK. So you don't need the video tutorial I did? Good enough.
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@Dave-R where is it?
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@Leggy said in help with a thread:
watching Rich's video about 8 times I'm making progress
I did a video?
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Aha I got you mixed up, that was the one I watched
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I’m the problem, ha ha
I need a back to basics tutorial, I always seem to miss a certain point and nothing happens . I can see the way both of you do the threads but I’m missing something -
Ok I’ve managed a male and female thread on a 150mm diameter, with a 0.3 offset, . It’s very tight can wind it on for 2 threads , and that’s it. Tomorrow doing another female with an extra 0.3 clearance on all faces, so see how that goes. I think it’s the shrinkage on the printer that’s causing the problem
Thanks Guys for all your help -
@Leggy said in help with a thread:
I think it’s the shrinkage on the printer that’s causing the problem
That's probably it. You'll have to work that out based on the material.
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I finally got it to work , pictures to follow , thanks Guys
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Well done @Leggy
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Hi guys
Again thanks for all your help
Is there a chart you use to look up thread dimensions, pitch, tpi , crest etc
I was trying a m22 x 2.5 and got a bit confused on the chart I was following, so I asked ChatGPT
After 4 hours of me telling it, it was wrong, it finally agreed
I was drawing it in SU then asking it questions on the iPad
When I get home I’ll upload my figures and see what you think, the thread looks good on the screen, but that doesn’t mean it will fit
Thanks Dean -
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These are what chat told me
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@Leggy said in help with a thread:
Is there a chart you use to look up thread dimensions, pitch, tpi , crest etc
I would use the following site:
External Metric ISO Thread Table Chart Sizes M20 - M55
Metric external thread size table chart for sizes M20 to M55 Bolts and screws per. ANSI/ASME B1.13M-1995.
(www.engineersedge.com)
I wouldn't bother with the radiused corners because they'd be too small.
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Ill check it out
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What about tpi?
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@Leggy said in help with a thread:
What about tpi?
What do you mean? The thread pitch is given along with the other dimensions for the threads. TPI standas for Threads Per Inch and is not used for metric threads. M22x2.5 indicates the nominal diamter is 22mm and the pitch is 2.5mm. The helix rises 2.5mm for each rotation.
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Ah ok , I see what you mean, this is where ChatGPT was messing with me
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