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Thread: Large hole in redgum
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4th August 2018, 06:47 PM #1Member
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Large hole in redgum
Howdy
I'm looking for suggestions on the best way to cut a large hole through a redgum slab it is flat on top and curved on the back.
Below is the slap and I have photoshopped in the hole:
RedGumSculpture.jpg
I will drill the 3 smaller holes and already have a large drill bit for the job.
https://www.timbecon.com.au/drilling...-bits-imperial
My original plan was to drill two holes at each end of the oval then use a bow saw, now I'm not so sure about that.
Any better ideas?
Thanks in advance
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4th August 2018 06:47 PM # ADSGoogle Adsense Advertisement
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4th August 2018, 06:52 PM #2
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4th August 2018, 07:25 PM #3Member
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Ranges from 10 - 12cm
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4th August 2018, 09:35 PM #4Member
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Do you think decent jigsaw could handle it? I presumed it would be to much, but I would be happy to be proven wrong. Just don't want to buy one to find out the blade is just going to snap.
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4th August 2018, 09:45 PM #5
Chainsaw will do it.
I am learning, slowley.
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4th August 2018, 09:47 PM #6
A jig saw should absolutely kill it! Depends on the saw and the blade I guess but 10-12mm is a cake-walk for any self respecting tool. Just makew sure you use the appropriate blade, which should be something like a Bosch "curves for Hardwoods" (can't remember the exact designation but can get a code number .....if necessary....
Suffice to say that I have cut 45mm thick softwood with a Bosch blade and the surface was about a 400 grit sanded surface. Stunning finish off the blade.
If the blade won't handle the tightness of the curve (quite possible) then just do what you can and use rasps/files/sandpaper to finish the job. Perhaps drill out the waste/tight curves with drill bits or forstners.
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4th August 2018, 11:18 PM #7GOLD MEMBER
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4th August 2018, 11:24 PM #8
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4th August 2018, 11:55 PM #9Senior Member
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Being curved at the back and quite thick I'd drill a series of holes then cut out the excess with key saw or similar.
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5th August 2018, 02:09 AM #10GOLD MEMBER
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Using what tools I have, I'd do a lot of drillings then chisel out the web among the holes.
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5th August 2018, 02:58 AM #11
I agree with RV - drill a bunch of holes near the outline and then use a chisel to remove the web between the holes.
Claude
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5th August 2018, 01:08 PM #12GOLD MEMBER
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Burn it out. The blackened edge will look quite natural.
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6th August 2018, 11:59 AM #13
Drill and chisel is about the only way. Finish off the edge of the hole with a rasp then sandpaer. Good old fashioned grunt work.
Regards
John
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6th August 2018, 12:28 PM #14Woodworking mechanic
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Drill a hole then use an electric reciprocating saw. The long demolition blades will handle that easily.
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6th August 2018, 12:34 PM #15
What about one of the tools from Arbortech --> https://www.arbortechtools.com/au/online-store/
Ive the Turboplane and minigrinder, both of which would do the job nicely.
The mini grinder is particularly good as one can mount sandpaper disks to it for cleanup (though you could use a drill with a disk-and-sandpaper thingo like we use for sanding bowls on the lathe)
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