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Puhoi Drill No.1 #123006 02/20/06 12:03 AM
Joined: Jul 2002
Posts: 8,262
Trumpy Offline OP
Member
Photo's and info submitted by RODALCO:

Quote
This is the drill used for the SH 1 tunnel from Waiwera going north to Puhoi, New Zealand.
Drilling commences from the North end, drilling towards Waiwera.
Starts formally on 20th Feb. 2006.


Drill machine. runs on 3Ø 1050 Volts ac:

[Linked Image]


Name-plate details from supply transformer:

[Linked Image]

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

[Linked Image]

Drill bit:

[Linked Image]

Tools for Electricians:
Re: Puhoi Drill No.1 #123007 02/20/06 12:10 AM
Joined: Jul 2002
Posts: 8,262
Trumpy Offline OP
Member
More pics:

Rear of drill machine:

[Linked Image]

Side of drill machine:

[Linked Image]

Close up of cutter:

[Linked Image]

Drill nameplate:

[Linked Image]

Thanks Ray. [Linked Image]

Re: Puhoi Drill No.1 #123008 02/20/06 10:50 AM
Joined: Jan 2005
Posts: 155
D
Dave T Offline
Member
Good stuff. Things that most don't get to see.
Thanks,
Dave

Re: Puhoi Drill No.1 #123009 02/21/06 02:47 PM
Joined: May 2005
Posts: 177
J
John Crighton Offline
Member
+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?

Re: Puhoi Drill No.1 #123010 02/21/06 05:10 PM
Joined: Jul 2002
Posts: 8,262
Trumpy Offline OP
Member
John,
Quote
I gotta ask... is that drill head decorated? Or is there a purpose for all those welded-on lines and dots?.

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.

Re: Puhoi Drill No.1 #123011 02/21/06 06:33 PM
Joined: May 2005
Posts: 177
J
John Crighton Offline
Member
"Hard facing" -- Hardly a day goes by that I don't learn something here. Thanks!

Re: Puhoi Drill No.1 #123012 02/26/06 12:26 PM
Joined: Aug 2004
Posts: 42
H
HighPotter Offline
Member
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

Re: Puhoi Drill No.1 #123013 02/26/06 12:53 PM
Joined: Apr 2004
Posts: 349
Radar Offline
Member
Quote
Although the drill is pretty big, not as large as a roadyway tunnel.

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


There are 10 types of people. Those who know binary, and those who don't.
Re: Puhoi Drill No.1 #123014 02/26/06 07:49 PM
Joined: Aug 2004
Posts: 42
H
HighPotter Offline
Member
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).]

Re: Puhoi Drill No.1 #123015 02/26/06 07:55 PM
Joined: Mar 2005
Posts: 1,803
Alan Belson Offline
Member
Can you buy hardfacing rods for a std. arc welder? Got an application in mind.

Alan


Wood work but can't!
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