1/4" BSPT

[STUARTF]

Hello to all,


Can anyone offer any help on creating a model of a 1/4" or 1/8" BSPT thread.


Or maybe someone has a full model of this thread.


I'm trying to do it with a sweep but the run ins are not that good.


Thnaks in advance


StuartF

 

[Dell_Boy]

Do you REALLY need a taper thread? Can you not just use the equivalent parallel cosmetic thread and tweak the description?

 

[[-Skint-]]

I can never really be bothered with accurate threads actually. Usually, If
creating a threaded hole I will get it pretty close to my Zeus book, but
tend to apply the specifics when sending to the factory.

Threads just bog down large assys.

 

[STUARTF]

Ineed to model it as we are making electrodes for an injection mould tool.

 

[surfdancer]

Do you need the male or female thread?


I model female pipe threads, SAE ports, etc all the time. I find it's easiest to rotate a cut profile for the drill and countersink, then use a helical cut for the thread using a tapered profile with a slight radius to pull the tool off the material on an angle. This is how single point threading would happen on a CNC, so I just do the same.


I need to do this for accurate representations of training and instruction manual illustration. For normal CAD work, I simply hide or suppress the thread feature.
Edited by: surfdancer

 

[Dell_Boy]

Oh what the hell I felt bored and using the parameters from Wiki at

http://en.wikipedia.org/wiki/ISO_228

came up with something that looks like



Just to be a REAL pain BSP has both roots and crests rounded so it probably requires a chaser instead of a single point tool to cut correctly. It also adds an extra degree or two of complication to the sketch profile


DB



Edited by: Dell_Boy

 

[STUARTF]

Looks good.


I've just found info on "Gauge Length" which tells me what the OD is 6mm form the front.


Incidently there is a lot of misleading info on the taper, which is 1:16 on diameter. A lot of sites show this as radially.