Tapered thread

[Oluwayimika_OLA]

Hi, is there a way I can create a tapered thread model. I tried using the thread command on a tapered face from the circle I extruded, but I could even select the face. I tried moving it back in the timeline but it didn't show the threaded surface 

[Drewpan]

Hi,

What is the purpose of a Tapered Thread? A standard thread or screw have clamping properties

that allow them to securely hold in place. A tapered thread would reduce those holding forces

and possibly not hold at all. Any thread will certainly prevent movement in the "upwards"

direction but a tapered thread probably would still allow rotation and not lock as securely and

maybe not lock at all.

Cheers

Andrew

[a.laasW8M6T]

Tapered threads are used in numerous applications, but most commonly for sealing Fluid fittings using either BSPT or NPT standards.

[Drewpan]

Hi,

Thanks for that. I have not come across them before. If you have a tapered thread

then wouldn't that affect how the threads lock down? As the thread gets "thicker"

it would get to a point where the thickness would prevent the thread from engaging

any further, sort of like a wedge? A normal thread locks due to friction between the

threads pulling them into each other. Wouldn't a wedge be a much weaker lock?

Is there any specific advantage to use tapered threads for fluids or is it some

traditional thing? I do know that threads can sometimes leak with fluids.

Cheers

Andrew

[davebYYPCU]

Is there any specific advantage to use tapered threads for fluids, 

Yes.  they are very common in fluid handling regimes - which rarely requires any clamping effect

They are designed to work efficiently in the tightening direction. to avoid 

 ... (standard) threads can sometimes leak with fluids.

Might help....

[TheCADWhisperer]

@Drewpan 

>>Tapered Pipe Threads<<

[etfrench · Accepted solution]

A tapered coil can give you a close approximation of a thread. Create the coil. Revolve/Join a solid cone to create the proper valley width.  Revolve/Cut another cone to create the proper crest width. 

 A sweep may give you a better thread form.  Pipe should work but doesn't.

[Oluwayimika_OLA]

1. I'm back to this comment to say the solution is profound