|Project by SPalm||posted 07-27-2009 04:05 PM||11442 views||91 times favorited||22 comments|
After seeing treeman’s excellent project of creating a Kerfmaker, I knew I had to have one. I did not really want to spend the required time right now to build his version, so I decided to reduce it down to the simplest required parts.
The main requirement is to have a sliding and locking bar that includes the width of a saw blade. I decided to make the saw width permanent because I usually use the same blade for doing this type of work. By having this a permanent thickness for the gauge, the build becomes half as easy. (Twice as easy?)
Creating a locking and sliding bar set was the next challenge. I really did not want to have to route a groove, so I made an overlapping ledge that will be pinched to form the lock. A bolt, large washers, and a T-nut created to locking mechanism.
The build took very little time. It is around 5 inches long. I used 3/4 inch stock with 1/4 inch top. I oversized the top pieces, glued them to the stock, and used the belt sander to clean them up. A one inch long 1/4 inch bolt was used for the lock. I inset the T-nut a little off center to maximise the clamping surface. The lock is very strong with a slight twist of a wrench. I nice knob here would be a good improvement, but heh.
To compensate for the exact width of the blade, I came up with a technique. Cut both sticks to the same length by closing the device all the way shut. Cross cut through both sticks to make them flush. Now the stick without the end piece on it needs to be reduced by a saw thickness. Clamp and cut a piece of scrap on the right hand side of a miter gauge. Slide this stick right up to this scrap and cut. Exactly one thickness will be removed.
-- -- I'm no rocket surgeon