Need to get thread tapping done (18mm x 1.5 LH) - Auckland

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danielbeek
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Need to get thread tapping done (18mm x 1.5 LH) - Auckland

Postby danielbeek » Fri May 18, 2018 1:10 pm

Trying to locate an engineering outfit (pref. North Shore) that can do 18 x 1.5 left hand, and 16 x 1.5 right hand.
Needed for some tie rod adjusters, out of 4140 round.
I've tried Active Engineering in Albany, but they don't have the LH tap.
Thanks!
1995 LBYD21, 31" ATs, 2" lift, 2.5" exhaust

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wjw
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Re: Need to get thread tapping done (18mm x 1.5 LH) - Auckland

Postby wjw » Fri May 18, 2018 5:28 pm

If you have no luck

https://www.carbidenz.co.nz/m18-x-1.5-l ... olkel.html

not as good as the Sutton Tools ones, but for the price and occasional use....
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MihiT
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Re: Need to get thread tapping done (18mm x 1.5 LH) - Auckland

Postby MihiT » Fri Jun 01, 2018 8:49 pm

Tap??
Chuck it in the lathe and single point it. Engineering 101.

I might also suggest that turnbuckles could be found at rigging or marine supply outfitters.
- 1990 LWB Safari flatdeck, TD42 -
- 1988 LWB 7-seat Safari, TD42 -
1989 LWB 5-Seat parts hack. TD42

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danielbeek
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Re: Need to get thread tapping done (18mm x 1.5 LH) - Auckland

Postby danielbeek » Thu Jun 07, 2018 10:10 pm

cheers guys.
Have access to a lathe but not skilled up enough on it so don't want to make up such critical parts.
Besides wouldn't you need a very specific cutting tool to give the right pitch etc (cutting internal thread, FWIW)? Might cost more than thread taps?
Anyway got some cheap ones off Aliexpress, which local engineering outfit will use to tap the threads for me. The last taper tap I bought from there was surprisingly good (as far as I can tell).

turnbuckles; I dont think that'd be a good move. Marine ones a 316 stainless, which might look super flash :lol:, but becomes brittle. Not sure about industrial options, but cant imagine finding one to match all my criteria, including different thread sizes each end.
1995 LBYD21, 31" ATs, 2" lift, 2.5" exhaust

MihiT
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Re: Need to get thread tapping done (18mm x 1.5 LH) - Auckland

Postby MihiT » Sat Jun 09, 2018 10:38 am

danielbeek wrote:cheers guys.
Have access to a lathe but not skilled up enough on it so don't want to make up such critical parts.
Besides wouldn't you need a very specific cutting tool to give the right pitch etc (cutting internal thread, FWIW)? Might cost more than thread taps?
.

Bits can be ground easily enough out of 1/2 or 1/4" tool steel and compared against a fishtail gauge or tight spec'd bolt. 60• is typical (and rect for metric)
Any machine with a leadscrew and change box/gears should be able to give your pitch.
tool looks like this:
Image

from http://firearmsdesigner.com/cutting-int ... the-lathe/

which actually gives a pretty good run down on the process.
- 1990 LWB Safari flatdeck, TD42 -
- 1988 LWB 7-seat Safari, TD42 -
1989 LWB 5-Seat parts hack. TD42

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