What are bench dog holes used for, twin over full bunk bed diy - .

Categories: Woodworking Projects For Beginners | Author: admin 21.08.2012

As in the recent discussion on vises I've started laying out a Roubo style bench which will probably have a wagon vise on the RH end, and a twin screw on the LH end of the face.
Trouble is though it'd be a pity to compromise holding performance in the traditional hand planing role as above by using round dog holes in the row for the wagon vise - if in fact this is a genuine issue.
The original thought was to use a face vice on the end and round dog holes in the moving jaws to cover both functions - but racking and vertical movement in these versus the apparently excellent performance of a good wagon vise led to the decision to go with the latter. Ian: I am not answering your question exactly, but I have both dog types in the bench I recently made (square on the front and a grid of round elsewhere for holdfasts) so I will give you my observations. However, I find my home made square dogs are much easier to adjust height with than my homemade round dogs in the holes. Money is simply the marker used as tools move thru the galaxy to their best-use destination. I may have missed it in your earlier posts, but unless you want to make your own round dogs from dowels, a spring is a non-issue.

If you do plan to build your own wooden dogs, you can add a metal spring in much the same way as the Lee Valley dogs or a wood spring similar to what is done with square dogs.
One caution- take a fair amount of time laying out your dog holes, being careful to avoid areas where they might interfere with the frame of the base.
I haven't looked to see if it is on line, but there was an article in a WW mag years ago that showed how to make round dogs. I seem to remember reading a piece somewhere which suggested that wire clips with time wear a groove in the dog hole - this was pitching the view that the flat spring strip is one of the advantages of the square type. The traditional square dog and hole seems to work really well with a wagon vise to hold work for hand planing.
I actually bought a large Lee Valley front vise last year intending to use it with a wide moving jaw and maybe three dog holes aligned with a grid in the bench top (like your twin screw Alan), but have been put off by the likelihood of this causing significant racking.
I know from using the Record that it's pretty stiff, but I wasn't too sure how it might do with a wider jaw, and offset dogs.

It'd need a set of Wonder dogs or similar to allow proper use to be made of a grid in the bench top though. The result would be very, very similar to what you have Paul - Basically a Schwarz Roubo with a twin screw front, a dead man and a wagon vise - and the wagon vise layout suits the leg location on this design.
The downside is the €260 plus shipping cost to me, plus it's got to be a bit more difficult to work around a Roubo style leg while maintaining a regular 3- 4in dog hole spacing - although the multi holes in the moving part sidestep it to some degree.

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