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1
Most hardwoods will work well for clamp stock - the harder the wood the less it will wear with use. Cut all of the pieces to size as given in the Cutting List. Here's a quick method for cutting the pieces for a single clamp to size: Cut four strips 18 inches long x 1 and 5/16 inch wide from standard 13/16 inch hardwood stock. Then, plane two strips down to 5/16 inch for the jaw sides and two strips down to 7/16 inch for the long jaw centers, short jaw centers, bar and cam. Cut the pieces to length and rip the bar to a width of 1 inch.
2
Glue up the top and bottom jaws as shown in the photo. Use 1 inch wide scrap/cutoffs spacers between the long and short jaw centers for alignment - don't glue them in place. Remove the spacers before the glue sets. Note that in the photo that two jaw assemblies are glued at once.
3
After the glue is set, clean up the jaws by removing 1/32 inch from the top and bottom of each jaw on the table saw. Trim the front and back ends of the jaw so that they are square and flush.
4
Insert the bar between the two jaws for alignment, then lay out the reliefs and kerfs as shown in the plan.
5
Cut out the jaw reliefs with a scroll or coping saw.
6
Cut out the upper jaw kerf with a band saw or back saw. Drill a 1/8 inch diameter through hole at the end of the upper jaw kerf as located in the plan.
7
To cut the curved slot for the cam in the upper jaw, use a 7/16 inch wide dado blade on the table saw set to a height of 7/8 inch. Place a piece of tape on the rip fence to mark where to stop the cut. Put a folded over piece of paper in the kerf to avoid cutting into the jaw on the other side of the kerf. Make the cut in the upper jaw is centered across its thickness. Slowly pull the jaw straight back out of the blade once it has been pushed to the mark on the fence.
8
Transfer the cam pattern from the plans to your stock and cut out its profile. Put the cam in position in the top jaw and drill the 1/8 inch pivot through hole as located in the plan.
9
Cut four 1 and 1/4 inch long pins from 1/8 inch diameter brass rod. Pin the cam in place in the upper jaw and check the action of the clamp. You may need to enlarge the slot a bit with a chisel or sand the end of the cam slightly.
10
Glue the bar in place in the bottom jaw. When the glue is dry, drill the three remaining 1/8 inch diameter pin holes in the lower jaw and bar. Glue the pins in place in the upper and lower jaw. Make sure not to glue the upper jaw pivot pin to the clamp. Sand the ends of the pins flush with the sides of the jaws. Sand all pieces through 180-grit paper. Put the upper jaw on the bar then glue the stop pin in place. Finish the clamps with several coats of tung oil.
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