- Dec 27, 2007
You suggested against the easiest and probably most effective method, only then to tell the OP to go find a diamond encrusted drill bit and liquid nitrogen. That was 'help'?So far I have helped out. I suggested a bit made of carbide or diamond to grind it out, or to freeze it and shatter it.
One does not have to buy the machine to receive it's service. There's a TIG welder and a TIG weldor within 10 minutes of everyone. 20 minutes ago, you though taps couldn't be welded on, and now you know exactly what a professional welder would say? Give me a break.You suggested he use an expensive tool he doesn't even have, with skills he doesn't even have, on a hole too deep that even a professional would likely say "use another method."
How in the world does a tap break off in aluminum?
You sure are stubborn.So he's going to tow his car to a welder? I bet that's free. I bet the welder charges nothing, too. There are no specific welding services. Maybe people like you know people who weld, but you can't just look up a welder in the yellow pages. I still wouldn't bother or trust welding it. Give me a break.
I definitely get that. If he were tapping a new hole and wasn't using a lubricant and wasn't breaking the chip, I could forsee an issue. But he was only chassing a tapped hole. I don't see how you could ever break a tap while chasing a tapped hole in aluminum. I suppose anything is possible though.i am a machinest by trade..it will break pretty esay on aluminum,becase the
metal is soft,so it will bind up,so when you back out it will bind up and lock up..
and if you forces it,it will snap..frist of with soft metals,the less flutes the tap
has, the better it will cut,becase there is more relief.so a 2 fulte tap would be
good.so the hearder the metal the more flutes,like a 3 or 4 flute tap.
now dose not matter what you will be tapping, always go in 1/4 of a turn in,
then 1/4 of a turn out,thats the way tapping works,when you turn in it cuts,so
when you back it out it will break the metal chips,so you will not get any binding.
always use some good lube..
Pulling the head costs a head gasket at most. Felpro composite HG's are $30.Pulling the head would cost more than towing... Keep trying.
I definitely get that. If he were tapping a new hole and wasn't using a lubricant and wasn't breaking the chip, I could forsee an issue. But he was only chassing a tapped hole. I don't see how you could ever break a tap while chasing a tapped hole in aluminum. I suppose anything is possible though.
Tap used was 1.25 x 8m (maybe I have that backwards) so it should have been right. Went to Harbor freight and got their diamond tipped bits (I know...but cheap enough to monkey around with) and then went to lowes and got some carbide bits....both for the dremel.
Also got some dewalt cobalt bits for my drill that the guy at Lowes swore would do the job just as well as carbide bits.
I am drilling with the cobalt bit and it is doing waaaaaaaaay better than the dremel stuff did.
Really hate to see you guys arguing. Appreciate the help.
HF has diamond (PCD) bits? I don't see them on their website.
I wonder how well a high quality HSS bit would drill into that broken tap? I've never tried drilling HSS with HSS...
What's the 5-digit lot number off the package?
Now you drill out the hole and tap it for a larger stud. You'll have to drill the hole out on the manifold too. I'd pull the head drilling and tapping a larger hole is going to create alot of shavings.
Also wasn't trying to argue, just supply a solutikon that apparently I had to defend for some odd reason.