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7 mm grub screws
Posted: Wed Sep 20, 2006 3:10 am
by KingDom
I have removed the aluminium plugs from my 2.0 litre crankshaft and put a tap through to make a 7mm thread. (I broke 3 taps doing this process!).
I now require 7 mm grub screws.
Does anyone know where I can get these? Preferably in Australia.
I could use bolts sawed off after tightend in position but prefer socket headed grub screws for ease of removal.
Thanks,
Dom
Posted: Thu Oct 05, 2006 3:43 am
by tectoteam
i guess now its too late.
but imo for that kind of work i would prefer tapered plug screws like the one in photo below.
common in bsp threads. with a bit of locking fluid.
also in australia..im far from, but i know that one of your local screw maker did some very stranges things, so why not your short m7 grub screws. brand is Umbrako.
7mm grub screws
Posted: Fri Oct 06, 2006 3:54 am
by KingDom
Since I have already cut 7 x 1 mm threads in the plug holes of the crank I do not really want to drill and tap them to a larger size.
Since not being able to find 7 mm grub screws anywhere on the planet my next resort is to try 1/16 NPT tapered plugs which are easily found.
The 1/16 NPT tapered plugs are just over 7mm in diameter and the thread is 27 per inch. Thats very near a 7mm grub screw.
Saturday I will try to run a 7mm die nut over these NPT plugs to convert them into 7mm grub screws. I hope this works.
If I knew this before I started I would have tapped the holes in the crank with a 1/16 NPT tap. Perfect.
A learning curve!
Posted: Fri Oct 06, 2006 5:35 pm
by x-rad