[TR] heli coiling aluminum cylinder head.

[Dave Massey]

Same thing.  Have a hole that is sized just big enough for the tap.

BTW, a piece of square tubing works just as wall and is much cheaper.  I've
got one for 1/4 and for 10-32.  Any drill press with the table squared up will
do a fine job.





Dave Massey






-----Original Message-----
From: Sujit Roy <triumphstag at gmail.com>
To: Triumphs <triumphs at autox.team.net>
Sent: Fri, Feb 15, 2013 1:07 pm
Subject: [TR] heli coiling aluminum cylinder head.


Im planning to heli coil the threads on my inlet manifold on my Stag. To
make sure the drill is perpendicular to the surface of the head, I plan to
have someone make me a 1 inch thick block and drill a perpendicular hole in
it. I plan to use this as a guide.


My issue is how to I make sure the Recoil brand of tap I have goes in
perpendicular to the hole in the cylinder head?  Im not sure what a Heli
coil tap looks, like but the recoil brand does not have a long taper.

Should I make another 1 inch block with a hole, tap that first, and then
butt the 1 inch block up against the cylinder head and then tap the threads
in the head through the 1 inch block block? Is this part over kill?
Sujit

--
Sujit Roy, Realtor
Cupertino, CA
(408) 839-8359

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