- Joined
- Dec 25, 2011
- Messages
- 10,552
Jon,
DUH! Of course, that's the reason for the extension. In that case, the extension was intended to come off of the lead screw. So the only problem is, as someone (Archimedes??) once said, a place to stand.
What I would do is this. It will require a hydraulic pump and jacking cylinder and extensions just a little shorter retracted than the larger diameter part of the lead screw/extension (AKA PortaPower Set). Cut two 2X4's or 2X6's to the same length, a little longer than the length of the larger diameter part of the lead screw/extension. Cut two pieces of for example 4" wide steel channel, length about 10". Assuming that the threads on the ends of the lead screw/extension are 3/8"-24, drill two 7/16" holes through the center point of each of the channels. About 3/4" in from each end of the channels, drill a hole about 3/16" diameter. Nail one of the two channels to one end of each of the two pieces of wood, forming a box open top, bottom and one end. But leave about 1/2" of each nail sticking out. Attach one end of the lead screw to the first channel with a stack of flat washers and either a 3/8"-24 long/coupling nut or three regular hex nuts. Fit the other channel over the other end of the lead screw and nail it to the other end of the wood side pieces, leaving the nails loose as before. Install washers and nut or nuts, and tighten both nuts or sets of nuts snugly.
Position the cylinder along one side of the lead screw, between it and one of the boards. If necessary, shim under the cylinder so that it lies in the same horizontal plane as the lead screw. Jack the cylinder out until there is about 1/4" clearance between the channel and one end of the board. Shim the gap with for example 1/4" plywood with a rough slot cut to clear the nail. Move the cylinder to the other side and repeat, except go to 1/2" gap. Repeat as necessary.
DUH! Of course, that's the reason for the extension. In that case, the extension was intended to come off of the lead screw. So the only problem is, as someone (Archimedes??) once said, a place to stand.
What I would do is this. It will require a hydraulic pump and jacking cylinder and extensions just a little shorter retracted than the larger diameter part of the lead screw/extension (AKA PortaPower Set). Cut two 2X4's or 2X6's to the same length, a little longer than the length of the larger diameter part of the lead screw/extension. Cut two pieces of for example 4" wide steel channel, length about 10". Assuming that the threads on the ends of the lead screw/extension are 3/8"-24, drill two 7/16" holes through the center point of each of the channels. About 3/4" in from each end of the channels, drill a hole about 3/16" diameter. Nail one of the two channels to one end of each of the two pieces of wood, forming a box open top, bottom and one end. But leave about 1/2" of each nail sticking out. Attach one end of the lead screw to the first channel with a stack of flat washers and either a 3/8"-24 long/coupling nut or three regular hex nuts. Fit the other channel over the other end of the lead screw and nail it to the other end of the wood side pieces, leaving the nails loose as before. Install washers and nut or nuts, and tighten both nuts or sets of nuts snugly.
Position the cylinder along one side of the lead screw, between it and one of the boards. If necessary, shim under the cylinder so that it lies in the same horizontal plane as the lead screw. Jack the cylinder out until there is about 1/4" clearance between the channel and one end of the board. Shim the gap with for example 1/4" plywood with a rough slot cut to clear the nail. Move the cylinder to the other side and repeat, except go to 1/2" gap. Repeat as necessary.
I moved from being a Fitter Machinist into I.T. 25 years ago i guess this got swapped around in my head at some stage.