Drill Bit

[Brainfarth]

We had to remove the old kelly box and replace it with a smaller one for this paticular rig. The box is made of 1" T1 plate that we cut on our CNC plasma. The metal was preheated to 300 degrees and welded out with about 50 lbs of 11018 rod. There were some wings made for it as well so he could make a wider hole (forgot to take pictures of those). You can see the holes in the plate where the wings attach.

[RandomDave]

That looks pretty scary. What size hole does it drill?

[oxy moron]

i want to see the size of the bottle of wine that this thing opens

[azsly1]

is that for drilling into limestone or some other rock like substance?

[Sandy]

I'll bet that thing takes some horses to turn. What a bit !!

[Brainfarth]

Yeah, it's a rock bit. It drills a 56" hole. He can go up to 60' deep. And I think he told me he's running about 200,000 lbs of torque.. And his rig is considered a smaller one in the field.

[drillman]

The Co. I work for has similar Augers. I think the biggest one is 48"

I've done similar jobs on some of our Augers. Looks like you did a good job on that on dude!

[jakeru]

Very impressive. Is the weave pattern around the outside of the helix some kind of hardfacing?

[Brainfarth]

Yeah it is. You can tell that they put it on after the wear on the wings happened.

[1-800miner]

Kind of on the same subject;
How do they manufacture augers?
I know the big ones like yours are semicircles of plate,welded together and stretched.
But the smaller ones like grain augers are made from a continuous piece of steel.
How do they get it to curlique?

[Fegenbush]

Originally Posted by 1-800miner

Kind of on the same subject;
How do they manufacture augers?
I know the big ones like yours are semicircles of plate,welded together and stretched.
But the smaller ones like grain augers are made from a continuous piece of steel.
How do they get it to curlique?

Feed flat strip into a cone roll at an angle. Not too bad, really, but getting it just right is a pain, especially if you are making one offs.