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#123006 - 02/19/06 08:03 PM Puhoi Drill No.1
Trumpy Offline


Member
Registered: 07/05/02
Posts: 8211
Loc: SI,New Zealand
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:




Name-plate details from supply transformer:



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



Drill bit:

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#123007 - 02/19/06 08:10 PM Re: Puhoi Drill No.1
Trumpy Offline


Member
Registered: 07/05/02
Posts: 8211
Loc: SI,New Zealand
More pics:

Rear of drill machine:



Side of drill machine:



Close up of cutter:



Drill nameplate:



Thanks Ray.
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#123008 - 02/20/06 06:50 AM Re: Puhoi Drill No.1
Dave T Offline
Member
Registered: 01/22/05
Posts: 155
Loc: Waukesha, WI, USA
Good stuff. Things that most don't get to see.
Thanks,
Dave
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#123009 - 02/21/06 10:47 AM Re: Puhoi Drill No.1
John Crighton Offline
Member
Registered: 05/16/05
Posts: 177
Loc: Southern California
+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?
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#123010 - 02/21/06 01:10 PM Re: Puhoi Drill No.1
Trumpy Offline


Member
Registered: 07/05/02
Posts: 8211
Loc: SI,New Zealand
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.
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Let's face it, these days if you're not young, you're old - Red Green grin
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#123011 - 02/21/06 02:33 PM Re: Puhoi Drill No.1
John Crighton Offline
Member
Registered: 05/16/05
Posts: 177
Loc: Southern California
"Hard facing" -- Hardly a day goes by that I don't learn something here. Thanks!
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#123012 - 02/26/06 08:26 AM Re: Puhoi Drill No.1
HighPotter Offline
Member
Registered: 08/29/04
Posts: 42
Loc: So. Cal
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
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#123013 - 02/26/06 08:53 AM Re: Puhoi Drill No.1
Radar Offline
Member
Registered: 04/30/04
Posts: 349
Loc: Los Angeles, CA
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
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#123014 - 02/26/06 03:49 PM Re: Puhoi Drill No.1
HighPotter Offline
Member
Registered: 08/29/04
Posts: 42
Loc: So. Cal
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).]
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#123015 - 02/26/06 03:55 PM Re: Puhoi Drill No.1
Alan Belson Offline
Member
Registered: 03/23/05
Posts: 1803
Loc: Mayenne N. France
Can you buy hardfacing rods for a std. arc welder? Got an application in mind.

Alan
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