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#1 |
Sisyphus was my mentor!
![]() Join Date: Sep 2002
Location: Carleton Place, Ontario CANADA
Posts: 984
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pipe thread tapping tips?
Hey all, I need to drill & tap a hole in my castiron thermostat housing in 1/4 pipethread. I've tapped a million holes using regular taps & chasser taps BUT I've never done a pipe thread hole. I know that pipethread is tappered & so I know you cant go too deep or else the hole will be too big. Can anyone give me any other tips? Thanks
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passthebuck ![]() #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car |
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#2 |
Wiseass secured himself a BAN
Join Date: Nov 2000
Location: MOON!!!
Posts: 2,282
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Tap a little then check with what ever is going in the hole. Tap a little then check until it is at the desired depth.
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#3 |
Registered User
Join Date: Dec 2002
Location: Canada
Posts: 695
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An obvious point I guess, but make sure you use a pipe thread tap. Usually comes with the set.
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1968 Chevy - 292 with a powerglide |
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#4 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Use thread tapping oil. It will help get smoother cut and better thread.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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#5 |
Registered User
Join Date: Jun 2002
Location: Southern California U.S.A.
Posts: 276
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The most important thing about tapping pipe threads is to keep in mind what fitting is going to be use. If the fitting is a 90 degree elbow for example, it is usually critical on which direction the fitting points (clocked) when is tighten.
Tap the hole until the fitting is clocked in the direction required, it may take as slight re-tap to get it right. Take your time, this kinda effort shows how much of a craftsman you are. |
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#6 |
Senior Member
Join Date: May 2002
Location: NORTHEAST OHIO
Posts: 493
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PIPE THREADS
do yourself a favor and get the proper drill and a tapered reamer the job will turn out perfect with no problems down the road
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#7 |
Merciless Butcher
Join Date: Oct 2003
Location: CC Nevada
Posts: 1,447
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Don't try and turn the tap in all at once. When you get a full turn, back it off about 1/4 turn then continue. It will cut cleaner threads.
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Your Bought And Sold....I Got Your Soul! |
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