216. Relief cuts for hole saws #mtbitesize #holesaw #woodworkingtips #makethings

The hole saw is a love / hate tool that I begrudgingly run to when I need either a large hole drilled or a disk made from a hole. Most of my holes made are with forstner bits, which work better overall. While forstner bits work to extract sawdust and chips by pulling both out as it cuts deeper into the stock, hole saws…hole saws compound the problem by muscling the left over dust and working it back it into the cut. Since larger holes require the outside teeth to spin faster, we’re already creating more heat with a hole saw than we would with a forstner bit. The heat from the high rotations and the sawdust left in the cut create so much friction that the steel becomes malleable and you’re left with a dull bit. You can buy carbide tipped teeth that will give you more life from bits, but you still have to struggle with the heat due to the saw dust.

Back in bitesize 139, we used a wet cloth pressed inside of the hole saw to keep things cool. This works if you’re doing thinner stock, but thicker stock can be a bigger problem as water can cause steel to heat up faster. If you’re making either several, or really deep holes, start off by running your saw just enough scratch the surface. Switch to a forstner bit that does much better with extracting dust, and place the parameter of the bit on the scratch you made. Drill it out and switch back to your hole saw. Now the sawdust has an exit hole that helps pull the sawdust away and keep the bit much cooler. Besides working on the inside of a hole, it can also be done on the outside if you’re using a saw to cut disks.

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Make Things

#MTbitesize #makethings

[MakeThings]

Hey Makers!

Here's a brief explanation of an acorn: in a nutshell, it's an oak tree.

Check out my other channel! → @makethingswithrob

[RazzleberryHaze]

Holy shit thats brilliant! You've probably just saved me hundreds of dollars.

This is the content i want to see on shorts. Not some tiktok wannabe bullshit.

[dylanbailey]

Thats a really clever trick, never would have though of drilling a second smaller hole when its an option.

[Ross-]

That is an excellent idea and will improve my hate hate relationship with hole saws, thanks

[jmad]

You can also just cut on the edge of your board so the hole saw breaches the side of the board and ejects sawdust that way

[someguy]

I’ve been using hole saws for many years, I’ve never seen such a great tip for using them. You got a sub!

[rappin]

This is especially useful for 12" holes. Yes 12 inches. Also helps to be blowing down the side of the hole saw as you cut.

[MarkMcCluney]

Very clever Rob, very helpful. Cheers mate.

[rtbmack]

Was stalling out on replacing the top of my old workmate table because of all the holes, thanks for the tip!

[cooperd]

This video is a diamond in the rough.

[ObiwanNekody]

That's a pretty awesome suggestion.

[Normal]

With the hole saw, you pull the blade out, after a little bit, then start over. That way you clear the saw dust each time.

[peterweller]

Took me a while to figure that out.
But thanks you guys rock.

[matzi]

Noticed that too a few days ago, i needed some holes in a board and my old hole saw had struggles to come trough the board. Than i had to make a cut at the edge of the board and i was through it in an instant, realizing that the saw dust needs a way to get out of there

[defvent]

Great stuff! Thats why I'm subscribed!

[crocoped]

Hell yea!!! love it, got a sub my friend

[petercoutu]

Or like anybody in the trades who use hole saws regularly. You peck drill through the material backing off. Enough to clear out the sawdust periodically.

[jimthesoundman]

You can also just blast out the sawdust with compressed air, you know...

[dreamthyf]

I only use hole saws for relatively thin jobs.

[unmortal]

could also use oil if youre gonna paint or sand or the hole isnt gonna be visable from the side you cut into water if youre concerned about looks