Hollowing logs

Arthropod · Oct 16, 2018

Hey folks, I´ve been looking for a method to hollow round logs (about 8 inches long and 4,7 inches in diameter) for commercial use.
Since I want to sell the products, the process should be quite fast and result in a clean hole. My best idea for now is attaching the log on a metal lathe and drill it with a forstner bit. Since I haven`t tried this, do you think it is even possible or can u come up with a better method?

Thx for any feedback!

DDoug · Oct 16, 2018

Trepanning.

You could make the bit from a steel tube, and braze on some HSS
toolbits.

I would use compressed air to clean the chips.

And you'll have a usable core when done.
Waste not.

Gordon B. Clarke · Oct 16, 2018

Arthropod said:
Hey folks, I´ve been looking for a method to hollow round logs (about 8 inches long and 4,7 inches in diameter) for commercial use.
Since I want to sell the products, the process should be quite fast and result in a clean hole. My best idea for now is attaching the log on a metal lathe and drill it with a forstner bit. Since I haven`t tried this, do you think it is even possible or can u come up with a better method?

Thx for any feedback!

Might help if we knew the purpose.

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CalG · Oct 16, 2018

It would help even more to know how big is "hollow". Sounds like the same dimension as "up".

SBAER · Oct 16, 2018

About 20 years ago I built a custom hole saw out of a pipe with two brazed in carbide cutters so that he could hollow out cedar logs to make birdhouses. I think he used it in a Shopsmith machine, it worked but not that well, you needed to retract the cutter often to clear the chips.

CalG · Oct 16, 2018

this

DDoug · Oct 17, 2018

SBAER said:
About 20 years ago I built a custom hole saw out of a pipe with two brazed in carbide cutters so that he could hollow out cedar logs to make birdhouses. I think he used it in a Shopsmith machine, it worked but not that well, you needed to retract the cutter often to clear the chips.

I would think a wider cut, with the same pipe thickness, might provide
more clearance for chips.
Yes, you would waste more wood in chips, but better than making them
all in to chips with a regular drill.

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Hollowing logs

Arthropod

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Gordon B. Clarke

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CalG

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SBAER

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CalG

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DDoug

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