"A place where you don’t have to be perfect" > I made a thing!

Scissor lift

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Maker of Things:
I have an installation to do, fitting a Georgian Mahogany corner cabinet.
Due to the weight and awkwardness of the job I wasn't keen to try and hold it up against the wall while drilling through the fixing holes in the back panel to put in fixings without some extra support.

As the client is uncertain how high up the wall she would like the cabinet I have decided to make a small scissor lift to raise and hold it in position.

I have a small collection of screw operated car jacks, some of which I use as adjustable stands in the workshop.  One of them will be used to drive the scissor lift.

The scissor bars of the lift are made from some laminated beech wood bed slats recovered from a scrap bed.  They are a little bowed but that won't matter as long as the bows are acting against each other in balance.  The pilot holes have been drilled at 14" centres giving 28" overall. 
M12 threaded rod (just because I found a bundle in a skip) will be used as the pivots of the scissors and each hole will be sleeved with some 12mm bore steel tube to reduce wear.

I will post more photos when I get some more of it built.

Maker of Things:
To reduce the wear on the wooden lift arms I decided to bush the holes with steel tube.
I had some off cuts off 12mm ID 14mm OD tube which I was able to cut with a plumbing pipe cutter.  The bushing was then pressed into the lift arms with a G cramp.

Maker of Things:
For the lift slides I found some pine that was from an old futon base I had recycled.
I bored three 14mm holes and then used my router table to mill a slot between two of the holes in each of the rails.

Maker of Things:
I did a quick test run of the lift action.
It works and extends 50" and is 10" when closed down.

Working it allowed me to measure the amount of lift screw I would need to operate it.

Maker of Things:
I used the old Land Rover jack for the screw.  Fortunately the jack was scrap as the screw had been bent but it would be ok for the scissor lift.  I 'leaned on it' a little, while it was held in the vice, to straighten the screw enough to make it usable.

The attachment points for the screw came from the legs of an old school table with a nut welded into each end.  The T shaped part needs to be braced for strength but was adequate for bench testing.
I will also need to make a handle for the square drive of the screw thread and then find some 'stuff' to make the top and bottom of the scissor lift table.


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