Bolt Clamps Together for Extra Reach Capacity
When need arose for some extra-long clamps, I developed this trick for increasing the capacity of my one-handed bar clamps. First, I drove out the retaining pins at the ends of the two clamps. Then, I drilled two 1⁄4 " holes in the bars where shown at top.
Next, I removed the movable jaw on one bar, reversed the movable jaw on the other bar, and screwed the bars together with 1⁄4 " machine screws and nuts. To turn this arrangement into a spreader, I bolt them together with the movable jaws on the bars in their normal positions.
--William McGee, Westboro, Mass.