|Project by kiefer||posted 02-23-2014 10:25 PM||7413 views||66 times favorited||24 comments|
This is the shop version of the Parallego clamp I designed and posted recently http://lumberjocks.com/projects/96025 .
I am working on my new work bench and got to the point where I needed more bar clamps to glue up the top so what better time to make more clamps .
For this version I used T bar for the beam and a bunch of oak railing off cuts that a friend gave me putting the cost at about $ 25.00 for the four clamps .
I started with the t bar and then made up the head and tail stock pieces from the oak spindle off cuts and drilled and threaded them to accept the screws which are 3/4” ready rod and have a handle fit on it which is 1 3/4 diameter and very comfortable and gives a good grip.The threading was done with a shop made tap which is shown in pic 3 and the threads are reinforced with CA glue and lubricated with wax .
The jaws are held to the screws by a flat rubber O ring which is fitted into a groove on the end of the screw and the screw bears against a washer in the jaw and the cover holds it all together .
The head and tail stock are cut out with the band and table saw to fit over the T bar ,the head stock is bolted and is a tight fit and the tail stock is a sliding fit but locks when pressure is applied .
The big feature of this clamp is that I can manipulate the work piece being clamped by applying pressure to the top or bottom of the jaws bringing the work piece into square see (http://lumberjocks.com/projects/96025 ) for examples of this .
The clamp has all the function and capability’s of the original and works well as you can see in pic 4 which is a dry fit of the two halves of the top ,the winding sticks show the top is perfectly flat and I hope it continuous with the outside layers added . The box of scrap in Pic 5 is what I started with and I also got to keep the vintage box dated 1961 Any questions I will be glad to answer .