Brutkey

wedge
@wedge@woodworking.group

I’ve been putting off buying Forstner bits because I can’t justify the cost, and I’m glad I did.

I just pulled out my old center-point bits for a brace (hadn’t tried them to date), sharpened them up and gave them some tests. They work beautifully, better than imagined. I really didn’t know what to expect, actually.

It cuts clean and fast enough, and with total control over depth of hole, no accidental overshooting.

wedge
@wedge@woodworking.group

Next is to inset the base of the post support in the block, and that will be bolted to only the block. If I need to take the post down for whatever temporary reason, that is where I do it.

I was going to use M8 bolts for that, but the bracket holes are M10, so I might upsize. M10 x 30mm.

The six holes that hold the giant tenon are also M10. This post won’t be going anywhere.


rag. Gustavino Bevilacqua
@GustavinoBevilacqua@mastodon.cisti.org

@wedge@woodworking.group

Not a lot of people consider this, but an M10 has almost the double strength of an M8, since it is function of the square of the diameter.

wedge
@wedge@woodworking.group

@GustavinoBevilacqua@mastodon.cisti.org

Crazy how 2mm can make such a difference.

rag. Gustavino Bevilacqua
@GustavinoBevilacqua@mastodon.cisti.org

@wedge@woodworking.group

It is based on the square root of 2 (~1.4142), so the double of a 10 mm circle is a 14 mm circle, not a 20 mm one.

Plato explained this in the Meno dialogue, in 385 BC… and someone still insist that to study philosophy is useless
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