How to make a large hole in a log wall

[Octavianus]

I need to make a hole about 135 mm through a timber wall, which has paneling on both the inside and outside, so it's probably a bit over 2 dm of wood that needs to be processed. How do I do it? I've looked at hole saws, but they seem way too shallow. I've tried to saw with the chainsaw, by pushing it through the wall, but it just kicks upwards all the time, which feels dangerous on a shaky ladder, and I don't get through the wall either.

So, any good ideas that might work?

 

[ingemar_o]

but with a hole saw, you run it until it doesn't go any further, then you break off the middle piece, then you repeat the whole process until you are through.
be careful not to run it so it gets too hot

 

[slacker]

but with a hole saw you go until it no longer goes further in, then you break off the middle piece, then you do it again until you are through.
be careful not to run it so it gets too hot

Exactly! Works pretty well too - Definitely neater than the chainsaw!

Axminster actually has great prices on hole saws of various dimensions. Thinking about ordering the whole range - Could be useful to have!

http://www.axminster.co.uk/axminster-axminster-holesaws-prod23108/

 

[Mats]

The alternative is to drill a couple of holes in a row and then use a tigersåg. Good blades are a prerequisite.

 

[Octavianus]

I was also thinking about the reciprocating saw, it can be useful for other things too. Where (in Sweden) can you otherwise buy a large hole saw? How easy is it to break off the pieces, how do you do it?

 

[ingemar_o]

looked at swedol they have 140 mm, you break with chisel or larger screwdriver

 

[Octavianus]

Thanks for the tip, but it was around 500 SEK, any tips on something cheaper? It doesn't need to be super quality, as I'm just going to make a hole.

 

[ingemar_o]

check here http://www.verktygsboden.se/halsagar/halsag, you also need a mount/holder http://www.verktygsboden.se/halsagar/halsagshallare.
you can check other places too
make sure the teeth don't get full of chips, and that you have a machine that can handle it

 

[Octavianus]

it's still over 500 SEK. Considering a reciprocating saw, then I get away cheaper, and can use it for other things later. Do you think it's possible to make reasonably good holes with one of those?

 

[prototypen]

It is the width of the blade and how much the blade is set that determines, as well as the sawing depth.

Without having tried ............. No, it doesn't work.

200 mm sawing depth with a turning radius of 67.5 mm sounds impossible.

A hole saw works, it has been tested.

Drilling small holes along the circle is possible but difficult to maintain the distance through 200 mm so either the hole goes into the previous one or goes off in the wrong direction.

Protte

 

[Jan-Å]

it's still over 500 kr. I'm considering a tiger saw, then I can get away cheaper, and use it for other things later. Do you think it's possible to make reasonably good holes with one of those?

A tiger saw is not exactly a precision tool, so cutting around like that through thick wood is hardly going to give good results, so I would buy a hole saw. You can never have too many tools just when you need to make a new hole somewhere, it's good to have a hole saw d^_^b

 

[Octavianus]

but it's not so important if the hole is perfectly round and nice, it's not going to be visible anyway. Can't you rent one of those hole saws, I can't be the first in this situation?

 

[Jan-Å]

but it doesn't matter if the hole is perfectly round and nice, it won't be visible anyway. Can't you rent one of those hole saws, I can't be the first in this situation?

No idea what can be rented, I usually rent from Cramo so check with them, Rami Rent is also located near the vehicle inspection, so if Cramo doesn't have the equipment, maybe Rami Rent does.

 

[Tigersågen]

The reciprocating saw is good for a lot of things , but it might not work here. If there are no requirements for it to look nice, since I assume you're going to have some ventilation duct out and the vent grille will cover the hole, I would use a drill and make a bunch of holes around it, then use a chisel to carve out the hole.

 

[hanssonrickard]

instead of the traditional hole saw, take a look at the "self-feed" drill.

http://www.verktygsboden.se/traeborr/self-feedborr


Which are much cheaper in Great Britain:

http://www.toolstop.co.uk/dewalt-dt4591-qz-5-piece-self-feed-drill-bit-set-p10935