Where to buy bottoming taps
10-28-06, 01:13 PM
#1
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Where to buy bottoming taps
Hey guys,
I'm putting a helicoil into a blind hole (i.e. a hole that doesn't go all the way through) in my engine. I have the hole drilled and tapped with the tap that the helicoil kit came with. However, since the helicoil tap is tapered on the end, I can't tap all the way to the bottom of the hole. I know I need a bottoming tap (a tap that isn't tapered), but for the life of me I can't find them anywhere in town. I tried NAPA, Autozone, Advance, Van's, Home Depot, and Lowe's. The closest I came was at NAPA, the guy found the size I need (M12x1.5), but he said NAPA didn't make a bottoming tap in that size. For referece, the Helicoil kit I got is for M10x1.5 and if the manifold bolts. The guy at NAPA tried the tap in various thread finders and we decided the tap is M12x1.5.
Any ideas where I can find a bottoming tap that's M12x1.5?
- Andy
I'm putting a helicoil into a blind hole (i.e. a hole that doesn't go all the way through) in my engine. I have the hole drilled and tapped with the tap that the helicoil kit came with. However, since the helicoil tap is tapered on the end, I can't tap all the way to the bottom of the hole. I know I need a bottoming tap (a tap that isn't tapered), but for the life of me I can't find them anywhere in town. I tried NAPA, Autozone, Advance, Van's, Home Depot, and Lowe's. The closest I came was at NAPA, the guy found the size I need (M12x1.5), but he said NAPA didn't make a bottoming tap in that size. For referece, the Helicoil kit I got is for M10x1.5 and if the manifold bolts. The guy at NAPA tried the tap in various thread finders and we decided the tap is M12x1.5.
Any ideas where I can find a bottoming tap that's M12x1.5?
- Andy
10-28-06, 02:33 PM
#2
Constant threat
make your own. Tap the hole with the tapered tap. Then take a second tap and grind off the tapered lead, making it flat....you will want to leave a SLIGHT taper....maybe two threads of it. Then run this tap into your previously tapped hole.
10-28-06, 03:21 PM
#4
http://www.jlindustrial.com/
I order from them all the time. They have good prices also, and provide lots of options for the same type.
I order from them all the time. They have good prices also, and provide lots of options for the same type.
Last edited by oorx7; 10-28-06 at 03:23 PM.
10-29-06, 07:21 AM
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10-29-06, 03:41 PM
#7
www.mcmaster.com is another decent source.
Baja is spot on - the aerospace machinists I worked with in the past cut down taps on a regular basis when there wasn't a plug tap handy.
Dave
Baja is spot on - the aerospace machinists I worked with in the past cut down taps on a regular basis when there wasn't a plug tap handy.
Dave
