crochet specs

Re: crochet specs

Paul M. in San Diego

>"How far below the top of the bench should the crochet be?"

I would make sure this is well below the height of your plow plane fence plus the height of a knuckle below the top of your bench. I'm sure you can understand the need for that extra knuckle height. ;-)

Re: crochet specs a bit O.T.

A.J. Byrd

>If can get hold of a copy of "HAND TOOLS: Their ways and workings" by Aldren A. Watson, Copyright 1982 Aldren A. Watson, Published by

W.W. Norton & Company New York/London, Take a look at page# 33. It has a wonderfly simple and well drawn example of a crochet or as he calls it a "Tapered Bracket". I made two of different sizes for my bench and attach the to the apron via 3/8 inch cap screws and brass inserts. I have more than one set of inserts in the apron because they allow me to move the crochet up and down as well as attach a verticle bracket which can be used with wedges to act as an ancilliary vise in a pinch. Hope this helps.

A.J.

Re: crochet specs

Adam Cherubini

>Hi Steve,

What sort of dimensions should I be looking at and how did you attach yours?

I think 10 degree angle makes sense. I'm not convinced it matters too much. The opening should be wide enough for the widest stock you'll work. In my shop, I can only joint 3" wide stock (typically matching planing 6/4) so that's all the width I need. I recommend lag bolts. The rh bolt takes most of the tension.

My bench is built from construction 2x material. Is there a good reason to use hardwood for the crochet?

Just an opinion: Soft wood (not to be confused with softwood) would be more gentle on the workpiece. But it may get chewed up. You could make it a really thin piece of ash or hickory- something with a little flex might be nice.

How far below the top of the bench should the crochet be?

This is the one thing I know for sure. It must be as high as possible so you can work narrow stock, but it must be low enough to clear your plow plane's fence.

Anyway, that's my two cents.

Adam

Re: crochet specs

Dean J in MN

>

What sort of dimensions should I be looking at and how did you attach yours?

My crochet was a feable attempt to copy the one from Roubo... Chris' crochet looks more of what Adam described. I agree it probably doesn't matter too much so long as it opens enough for the largest stock and is low enough to allow you to use your fenced planes.

Mine is attached with lag bolts. Four of them, which is probably overkill, but it seems to be staying in place. :)