help with a thread

Leggy

with a 150mm diameter

Dave R

So what's your problem in trying to model it in SketchUp? What's not working?

there are only 4 crests on the thread
When you model it make it 2 or 3 turns longer so you can cut the extrusion off nicely.

Leggy

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

Leggy

with a 150mm diameter

Leggy

ok , after watching Rich's video about 8 times I'm making progress. I was missing the upright extension
what's curve origin? I set it to -1.5 as in the video, so that made the male thread , now to make the female which ill offset by 0.3

Dave R

@Leggy said in help with a thread:

I'm making progress.

OK. So you don't need the video tutorial I did? Good enough.

Leggy

@Dave-R where is it?

Rich O Brien

@Leggy said in help with a thread:

watching Rich's video about 8 times I'm making progress

I did a video?

Dave R

@Leggy said in help with a thread:

where is it?

Leggy

Aha I got you mixed up, that was the one I watched

Leggy

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

Leggy

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

Dave R

@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.

Leggy

I finally got it to work , pictures to follow , thanks Guys

Leggy

Leggy

1CB2BC12-596F-4745-BC0F-C832939B95AE.mov

Rich O Brien

Well done @Leggy

Leggy

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

Leggy

Leggy

These are what chat told me