Photo's and info submitted by RODALCO:



Drill machine. runs on 3Ø 1050 Volts ac:




Name-plate details from supply transformer:



Drill bit, about 1.2 meters in diameter, note water jets for cooling:



Drill bit:

More pics:

Rear of drill machine:



Side of drill machine:



Close up of cutter:



Drill nameplate:



Thanks Ray.

Good stuff. Things that most don't get to see.
Thanks,
Dave

+1 thanks for sharing these.

I gotta ask... is that drill head decorated? Or is there a purpose for all those welded-on lines and dots?

John,

Them lines are what what is known in the welding trade as hard-facing.
It's put on there to postpone wear to the actual surface of the cutting head.
Excavator buckets and bulldozer blades typically have the same thing.
It's done by running a bead of weld from a special hard-facing welding rod all over the surface to build it up.

"Hard facing" -- Hardly a day goes by that I don't learn something here. Thanks!

VERY cool pictures !

I can only assume that SH-1 is a roadway?
If so, does that mean that the drilling "arm" adjust up-down-sideways ? as the drilling is performed.?

Although the drill is pretty big, not as large as a roadyway tunnel. I'm curious.

HP

Another little light just blinked on. Just this past week we started twin tunnel boring in East Los Angeles. We have 2 TBM's (tunnel boring machines), each about 21' diameter. I'll see if I can get some pictures together during the week.

Radar

wow ! 21 feet? Where in East LA would this be? Sewer line? I didnt think there were anymore subway projects going on.

HP


[This message has been edited by HighPotter (edited 02-26-2006).]

Can you buy hardfacing rods for a std. arc welder? Got an application in mind.

Alan