tpi?  RSS Feed

#1 2011-01-24 9:08pm

spinkyracer
Centurion Member
From: Oskaloosa, IA
Registered: 2010-10-04
Posts: 123
Bikes: 3

tpi?

When talking BB what does tpi mean??


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#2 2011-01-24 9:10pm

neon
IRON MAIDEN RULES
From: Panama City, FL
Registered: 2008-03-19
Posts: 2607

Re: tpi?

threads per inch


As of 1/09/2014

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#3 2011-01-24 9:18pm

spinkyracer
Centurion Member
From: Oskaloosa, IA
Registered: 2010-10-04
Posts: 123
Bikes: 3

Re: tpi?

Thanxs I didn't think about is b4 the post:lol:


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#4 2011-02-13 8:05pm

paolooch
Intermediate
From: Chicago, IL
Registered: 2011-02-07
Posts: 321
Bikes: 4

Re: tpi?

most bike shops have TPI measurement tools to check if you are not sure.


"And don't give me any of that local anesthetic, I want the good imported stuff!"

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#5 2011-02-16 6:49pm

Whiplash
Member
From: Hermiston, OR
Registered: 2009-12-06
Posts: 58

Re: tpi?

neutral

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#6 2012-01-18 10:45pm

kod38
Member
From: Oregon
Registered: 2011-02-20
Posts: 98
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Re: tpi?

It is not a bad idea to pick up a set of thread gauges like at Harbor Frieght?
They are nice to have around to be sure what tpi you're dealing with as well.


Cruise Portland with BMXPDX on FB. We ride every 3rd Sat each month.

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#7 2012-11-04 1:12am

version7075
Pro Member
From: Australia
Registered: 2012-07-21
Posts: 313
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Re: tpi?

kod38 wrote:

It is not a bad idea to pick up a set of thread gauges like at Harbor Frieght?
They are nice to have around to be sure what tpi you're dealing with as well.

Thread gauges are very useful... as are thread files!
Thread files also have a section on the end you can use as a thread gauge.
In fact, when dealing with metric threads, its pretty easy - for example, you can have 2 different bolts, say 8mm & 10mm diameters, with the same thread count.... eg: 8mm x 1.25, and 10mm x 1.25. You will find the thread gauge for 1.25 (or the 1.25 thread file) will fit both bolts.

This is contrary to the old sae/imperial bolts - a fine or course threaded 5/16" bolt will 99.99% of the time have a different thread count from a fine or course threaded 3/8" bolt.


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