I need the modeling about threaded hole

Junny_Namu

Please. Let know about how to make threaded hole
Thank you

john_mcclary

First the manual approach:
https://www.youtube.com/WATCH?V=HUMHT9LGQ7U

Now the easy way:
Thread creator is a nice Feature script for this:
https://cad.onshape.com/DOCUMENTS/6B640A407D78066BD5E41C7A/V/845D049782179B9FAEE8B6E6/E/F8AEA9E5C33E02EAB0854A4F

Junny_Namu

Thank you for answer.

I have other question about The command 'hole'..

1. Is it can not thread modeling? 

2. How can i use it? I don't know why not apply.

john_mcclary

Hole command will not cut threads into a part. It is for calling out holes (tapped, counter-bore, counter sink) in a drawing leader.

It is common to not cut threads into a part unless you need to machine them or 3D print them directly off the model.


If you need threads try using thread creator instead: 
https://cad.onshape.com/documents/6b640a407d78066bd5e41c7a/v/845d049782179b9faee8b6e6/e/f8aea9e5c33e02eab0854a4f

owen_sparks

Hi, no, the hole command can't make threads, this is why John has pointed you to other methods...  If can do pilot holes (tapped option), and it will put the correct information on a drawing, but not model the threads themselves. 

Also in your example you've selected "Clearance and Tapped"  so it's expecting 2 parts in the merge scope, the first for the clearance, the 2nd for the tapped.

Owen S.

owen_sparks

Also please see the documentation for the native hole feature is here.

Owen S.

sidney_quitorio

@john_mcclary why is it common to not cut threads for holes where screws will be placed? I'm new to this so hope you can bear with me. But if I get one of my parts injection molded or machined, wouldn't there need to be threads for the screw hole?

owen_sparks

@sidney_quitorio

There is a bit of a discussion here https://forum.onshape.com/discussion/comment/33855#Comment_33855 on the merits or otherwise of modelling holes.

For injection mould you'd probably either use a threaded brass insert (so you'd model the hole for it) or self tapping screws so again you'd just model a hole.

The hole tool can take threading info, so  it'll show up on your drawings just fine, but no need to model the actual threads.

3D printing may be the exception, you can model genuine course threads and print then, but for smaller stuff we're back to metal inserts or self-tapping.

Any question please shout

Owen S.

john_mcclary

Also I would hazard a guess, most cad users will not be injection molding, CNC lathe thread cutting, or 3D printing every part.

Most manufactures will look at the thread callout on a drawing rather than pulling out a pair of calipers to the piece of paper. Then they will open their toolbox and grab the tap or die for that thread. So just round holes are more than plenty.

There are many that will need to model threads and that's why I linked the thread creator FS above.

Too much detail in a model is never a good idea, so unless you really really need to show fine detail. You should just stick to simple representations of it instead.

michael3424

In the FDM 3D printer world, it is common to design parts that need threaded holes with simple holes that are sized slightly smaller than the diameter of the major diameter on the fastener and use the fastener as a crude tap in the hole to make its own female threads.  I'll often use a tap as well, but I'm a bit anal.

larry_hawes

I've tapped most of my simple round holes for final assembly after 3D printing parts. There are guides as to correct smooth hole diameters for almost any size tap.