C-spanner as extractor

[Philip Davies]

Just thought of this! Sometimes it’s difficult to get the plug out of a holesaw.

[BuffaloJohn]

Perhaps a little more explaination - having already tried many, many different ways of getting the plug out of the hole saw.

In looking at the picture, my guess is that you stuck the c-spanner into the slot on the hole saw. If so, then get a second tool to go into the slot on the opposite side, so you can work both - especially needed when you just punched through thicker material.

For a 2x cut where the plug is close to the depth of the inside of the hole saw, I have used pin punches quite successfully. I'm sure others will chime in...

[Philip Davies]

Perhaps a little more explaination - having already tried many, many different ways of getting the plug out of the hole saw.

In looking at the picture, my guess is that you stuck the c-spanner into the slot on the hole saw. If so, then get a second tool to go into the slot on the opposite side, so you can work both - especially needed when you just punched through thicker material.

For a 2x cut where the plug is close to the depth of the inside of the hole saw, I have used pin punches quite successfully. I'm sure others will chime in...

Quite right, John, apologies for lack of explanation. I bore from each side if the material is thick, but of course, this isn’t always applicable.

[mklotz]

Before applying the hole saw, I drill two holes inside and tangent to the circle of material to be removed by the hole saw. This provides channels for the saw to dump the sawdust. (This may not be as important when sawing wood as it is when sawing metal.) The slug thusly has two recesses into which various forms of levers can be fit to extract the slug. [If sawing a lot of slugs, an ice tongs like tool might be worth making.]

Another approach (untried by me) would be to drive some screws partway into the back side of the slug within the cut circle so the slug has two "handles" to grab to extract it when the cut is finished.