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13th January 2006, 01:41 PM #1
Using the Rocker mortising jig for half-blind dovetails -a refinement
In a recent thread I mentioned that my mortising jig could be used to remove most of the waste in the sockets between the pins of half-blind dovetails. I have now added a refinement, in the form of 7° wedges attached with double-sided tape to the faces of the stops of the jig. In this way, instead of removing a rectangular area of waste, the router removes a trapezoidal area, so that the faces of the pins are routed to the layout lines, and only a very small area of waste remains to be chiselled away.
The first picture shows the board in position on the jig for routing the final socket in the set. The second shows the jig with the board clamped to it.
The board in question is blackwood with a strong fiddleback figure. The wood is tricky and awkward to work with chisels, and I have to say that I am highly sceptical of Auld Bassoon's claim that he would be able to saw and chisel this set of sockets in 20 minutes.
Rocker
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