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g1/4" tap thread type BSPP or BSPT?

post #1 of 10
Thread Starter 
I'm thinking of doing some extra ports/taps but I don't know which tap type I should get. Thanks.
post #2 of 10
you'll need a 11.2mm drill bit
and one of these http://www.frozencpu.com/products/11150/too-25/Industrial_High-Speed_Steel_British_Standard_Thread_Pipe_Tap_-_14-19_BSPP.html?tl=g30c101s1365
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post #3 of 10
Thread Starter 
Quote:
Originally Posted by somebadlemonade;15440615 
you'll need a 11.2mm drill bit
and one of these http://www.frozencpu.com/products/11150/too-25/Industrial_High-Speed_Steel_British_Standard_Thread_Pipe_Tap_-_14-19_BSPP.html?tl=g30c101s1365

Thanks mate. Looks like its BSPP; ebay and mcmastercarr.com have some for a little bit less. I'm going to check my local hardware stores to see if they have them too. +1 smile.gif
post #4 of 10
Quote:
Originally Posted by somebadlemonade;15440615 
you'll need a 11.2mm drill bit
and one of these http://www.frozencpu.com/products/11150/too-25/Industrial_High-Speed_Steel_British_Standard_Thread_Pipe_Tap_-_14-19_BSPP.html?tl=g30c101s1365

You meant 11.8mm I think..smile.gif

I bought mine at mcmaster, not cheap either there, but quality tap and drill bits. You do get what you pay for on drills and taps.
    
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post #5 of 10
heh, yea, i meant 11.8mm, i just posted the easiest one to find, that was the first link through google. . .
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post #6 of 10
Thread Starter 
Sounds like a 7/16" or 1/2" hole first? I'm picking up some scrap thick acrylic to practice. I just wasn't too sure if it was bspp or bspt.
post #7 of 10
it's closer to 15/32" drill bit, but you are better off grabbing the 11.8 since that's what it was designed for
but with how the tap cuts the threads into the hole, it being bigger might be a problem

and since you are putting this through a flat surface you need that drill to be pretty damn close to perfectly perpendicular to the surface for a good seal, meaning you'll want to use a drill press

they aren't that expensive for the right bit and tap
http://www.mcmaster.com/#2958a157/=emyx33
http://www.mcmaster.com/#8328a22/=emyxm2
Edited by somebadlemonade - 10/24/11 at 7:46pm
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post #8 of 10
Thread Starter 
Quote:
Originally Posted by somebadlemonade;15441867 
it's closer to 15/32" drill bit, but you are better off grabbing the 11.8 since that's what it was designed for
but with how the tap cuts the threads into the hole, it being bigger might be a problem

and since you are putting this through a flat surface you need that drill to be pretty damn close to perfectly perpendicular to the surface for a good seal, meaning you'll want to use a drill press

Thanks again smile.gif

I have a drill press at home that I can use. I'm lucky there's a plastics company 10 minutes away and they sell scraps by the pound. Gives me a chance to practice before putting it to use.


edit: some drill bit sizes from mcmastercarr.com:

29/64" ~ 0.4531"
11.8mm ~ 0.4646"
15/32" ~ 0.4688"
Edited by wermad - 10/24/11 at 8:05pm
post #9 of 10
so you are looking to make your own custom res?
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post #10 of 10
Thread Starter 
Quote:
Originally Posted by somebadlemonade;15442545 
so you are looking to make your own custom res?

Possibly smile.gif

I have a few ideas brewing that I want to test their feasibility first biggrin.gif


edit: Ordered from Mcmastercarr.com:
1- g1/4 bspp tap
1- 11.8mm drill bit
Edited by wermad - 10/25/11 at 11:01am
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