Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-26-2011, 07:27 AM   #1
Rivet Master
 
Lothlorian's Avatar
 
1973 27' Overlander
Loganville , Georgia
Join Date: Nov 2007
Posts: 1,733
Cutting perfect hole-furnace exhaust in skin

I am not far from intalling my new suburban furnace into my 1960 overlander. I have to cut holes for the exhaust. I have a Dremel Trio but it can be tricky keeping a perfect line when cutting. What do you suggest I use to cut the perfect hole for my suburban furnace exhaust. I would like to use a sheet metal cutter, but I have read it is only recommended for a drill press. Can they be used on a hand drill?

Brian
__________________

__________________
Brian & Adrienne
Lothlorian is offline   Reply With Quote
Old 11-26-2011, 07:32 AM   #2
Well Preserved

 
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,190
A hole saw would be best.
__________________

__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
overlander63 is offline   Reply With Quote
Old 11-26-2011, 08:25 AM   #3
Restorations done right
Commercial Member
 
Frank's Trailer Works's Avatar
 
1962 26' Overlander
1961 26' Overlander
Vintage Kin Owner
Currently Looking...
Baltimore , Maryland
Join Date: Aug 2007
Posts: 5,547
Images: 2
... or hand shears. It's just aluminum, so have no fear. Cut with confidence.
Frank's Trailer Works is offline   Reply With Quote
Old 11-26-2011, 08:47 AM   #4
Rivet Master
 
clancy_boy's Avatar
 
2003 22' International CCD
Kiln , Mississippi
Join Date: Dec 2005
Posts: 2,780
Images: 8
How big of a hole and is it a perfect round hole? If so I would use a hole saw. They have a centering bit that will keep it from drifting and place the hole right where you want it.
__________________
Michael & Tina with Layla and Preston BZ
The family has grown.
2003 22' INTERNATIONAL CCD
clancy_boy is offline   Reply With Quote
Old 11-26-2011, 12:48 PM   #5
Rivet Master
 
Join Date: Dec 2002
Posts: 1,313
Images: 4
If the holes are too large for hole saws, I use a tank cutter:

Tank Cutters | Buy a Tank Cutter at THESITEBOX.COM

Nick.
__________________
Nick Crowhurst, Excella 25 1988, Dodge Ram 2500 Cummins Diesel. England in summer, USA in winter.
"The price of freedom is eternal maintenance."
nickcrowhurst is offline   Reply With Quote
Old 11-26-2011, 01:01 PM   #6
Rivet Master
 
noreen&sal's Avatar
 
1981 27' Excella II
mays landing , South Jersey
Join Date: Nov 2009
Posts: 1,179
Images: 9
Just do it. God hates a coward. Sal.
__________________
Sal & Nora
Let us live so that when we die even the undertaker will be sorry. Mark Twain
AIR 42483
TAC N.J. 17
WBCCI 24740
noreen&sal is offline   Reply With Quote
Old 11-26-2011, 01:05 PM   #7
Rivet Master
 
Wabbiteer's Avatar
 
1973 27' Overlander
1972 29' Ambassador
St. Paul , Minnesota
Join Date: Apr 2006
Posts: 1,912
Images: 2
Blog Entries: 2
They make a punch tool to install additional circuits in steel electrical boxes, basically two cups that rest on either side of metal with a threaded bolt to draw them together - drill a pilot hole, assemble cups and tighten and it cuts a perfect circle. However getting the right size may be a chore, or expensive, or both. Maybe a good tool rental shop could/would have sizes above three inches?

HARBOR FREIGHT TOOLS 3" PUNCH sells for $30 but I'm not sure if it includes the 3/4" arbor bolt, that maybe it is only an add-on piece to another set like the $25 1/2" to 1-1/4 manual set or the 1" to 2" hydraulic kit (HF Punch search here)

I got one of the small size kits from Greenlee on clearance ages ago and they come in handy!
__________________

Wabbiteer is offline   Reply With Quote
Old 11-26-2011, 01:27 PM   #8
Rivet Master
 
worldinchaos's Avatar
 
1959 17' Pacer
Long Beach , California
Join Date: Mar 2011
Posts: 920
Thumbs up Yes.

Quote:
Originally Posted by noreen View Post
Just do it. God hates a coward. Sal.
So awesome. x2
__________________
- Peter (and Marie)
TAC CA-15

1959 Pacer 18' Renovation - Knight in Shining Armor

Our Adventure Blog - Documenting our backpacking, hiking, camping, and Airstreaming
(still updating, haven't gotten to the Airstream trips yet)
worldinchaos is offline   Reply With Quote
Old 11-26-2011, 01:50 PM   #9
Rivet Master
 
Join Date: Dec 2002
Posts: 1,313
Images: 4
Quote:
Originally Posted by noreen View Post
Just do it. God hates a coward.
When leading a particularly difficult section on a rock climb, I used to tell myself just that sort of message.
I then always fell off.
Now I know better.

Nick.
__________________
Nick Crowhurst, Excella 25 1988, Dodge Ram 2500 Cummins Diesel. England in summer, USA in winter.
"The price of freedom is eternal maintenance."
nickcrowhurst is offline   Reply With Quote
Old 11-26-2011, 02:34 PM   #10
Rivet Master
 
Excella CM's Avatar
 
1978 31' Excella 500
Venice , California
Join Date: May 2006
Posts: 1,061
A chassis punch is ideal for a clean cut, but expensive to buy. Fly cutters(tank cutters) are too radical for hand use on light materials. a sharp hole saw will work, but the drill in the center should be replaced by a plain mandrel after the pilot hole is drilled to prevent the pilot hole from elongating and enlarging as the saw cuts the outer diameter. Since the opening is covered by a trim plate anyway, you could do a careful job with a sheet metal "nibbler" tool-good to own in its own right.
__________________
"Not all who are laundering are washed" say Bill & Heidi

'78 Excella 500,"The Silver Pullit". vacuum over hydraulic disc brakes, center bath, rear twin. '67 Travelall 1200 B 4X4 WBCCI 3737
Excella CM is offline   Reply With Quote
Old 11-26-2011, 04:26 PM   #11
Rivet Master
 
Lothlorian's Avatar
 
1973 27' Overlander
Loganville , Georgia
Join Date: Nov 2007
Posts: 1,733
Thanks guys for your advice. We have been very exact on everything we are doing. The trailer is looking really awesome. This one I don't want to screw up. I have used tin snips before and the dremel. I might be a little to concerned about the hole, but the trailer is looking really tight (slang for good).

Brian
__________________
Brian & Adrienne
Lothlorian is offline   Reply With Quote
Old 11-26-2011, 04:55 PM   #12
3 Rivet Member
 
alclad's Avatar
 
1961 16' Bambi
Wilmington , DE
Join Date: Sep 2008
Posts: 133
Images: 46
use hand shears. "wiss" makes them and they sell at a big box or a good hardware store. if you are right handed get the ones that leave the waste to the left of the blade. if left handed do the other. they are lefts and rights so less stress is on what you want to save. they also have a center cutter which stresses both sides. 3 colors for the handles. i am thinking red handles are for right handed use....

don

http://www.cooperhandtools.com/brand...pound%20Action
__________________
alclad is offline   Reply With Quote
Old 11-26-2011, 05:27 PM   #13
3 Rivet Member
 
pgr32e's Avatar
 
1974 27' Overlander
Sault ste Marie , Ontario
Join Date: Jun 2004
Posts: 165
Images: 6
Used a hole saw for mine, worked fine......Phil.
__________________
pgr32e is offline   Reply With Quote
Old 11-27-2011, 12:19 AM   #14
3 Rivet Member
 
1969 27' Overlander
Albuquerque , New Mexico
Join Date: Sep 2011
Posts: 168
Absolutely use a hole saw.
If you already have a smaller, or ragged hole, drill a template in a scrap piece of plywood. Then hold the plywood firmly over the aluminum, and drill the new hole through the hole in the plywood.
The plywood will prevent the hole saw from "skidding" around and you'll get an exact circle. You might need someone to help hold the plywood in place.
If you don't have the right sized hole-saw, go buy a set. You'll use them sooner or later. (Buy a good quality set.)
__________________

__________________
Ed Glenn
edglenn is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Duo-therm and furnace question... NoMoSOBs Furnaces, Heaters, Fireplaces & Air Conditioning 13 10-21-2011 10:17 AM
Sealent for furnace exhaust vent Dan Clayton Furnaces, Heaters, Fireplaces & Air Conditioning 3 10-07-2011 07:13 AM
Need advice on furnace. SilverRanger Furnaces, Heaters, Fireplaces & Air Conditioning 5 05-28-2011 04:47 PM
Heater Hole Patch.... Kevo Ribs, Skins & Rivets 16 04-28-2011 07:51 AM
Airstream Caravel 17' perfect skin 1967 eBay Watch Airstreams on eBay 0 02-02-2011 08:20 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:39 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.