1 Attachment(s)
Swing gantry for the workshop
A project that has been on "the list" for a while has been some sort of gantry to service the lathe. The downside of having a slightly larger lathe is that the chucks are also larger, and at over 25kg there's plenty of potential for injury and damage when trying to change them.
I'd planned just to make some sort of rail that went from the lathe out into the workshop a metre or so, but with the mill and workbench in the same area it made more sense to build a swing style gantry that will cover the lot.
I've already got a few metres of round tube gantry rail and an Altrac trolley that I picked up used a while back - so will use that for the rail.
https://www.bomac.com.au/altrac-products/trolleys
Plan is to attach that rail to a pipe upright and support it from the top with a stay. Rail will be at the top of the shed wall height, and the stay will be almost at the peak of roof.
Bearings top and bottom to allow the whole assembly to rotate. Bottom will be on a plate bolted to the floor. Top will be tied back to the existing column that's attached to the pipe roof truss. Unlikely I'll need to lift anything more than about 50kgs with it so a dynamic test with 100kgs (ie me bouncing on the end of it) should be sufficient for a load test.
Attachment 385814
Before the whole COVID lockdown I picked up a piece of 80NB pipe for the upright.
Dug out a suitable size tapered roller bearing from the junk box, and some bits of scrap steel to make a housing and spindle.
Grabbed an old falcon front hub seal to keep the swarf and grandkids out of the bearing, and headed to the lathe.
Spindle to take the bearing and seal.
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Seal and bearing installed in the housing
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Housing installed in the pipe, and spindle in place
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To be continued.....
Steve
Swing gantry for the workshop
Quote:
Originally Posted by
Dave J
Just to add, I had that round tube and trolley already installed in my shed 35 years ago, and have seen the trolley let go and fall to the ground as it spread, luckily no one was hurt. Maybe it was overloaded, not sure as it had no load limit on it back then.
Just be careful and keep well under it's limits. I scraped mine, but my fix would have been to weld plates with half circle cut out and welded to the sides to stop it spreading.
Thanks for the warning Dave (and for the previous alignment suggestion).
This one is rated with a SWL of 300kg so should be plenty of extra capacity for what I'm using it for, but will definitely keep an eye on it.
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Steve
Swing gantry for the workshop
Some progress on the top mount...
Cut a flange out of some 16mm plate and turned a step in it for inserting into the pipe. Beveled the edge of the step to make the welding easier.
Bored the middle out for the stub shaft, and welded the shaft in.
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Turned the shaft to size, threaded the center for a retaining cap for the bearing, and made/fitted the cap.
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Welded the whole lot to the mast pipe, and made a start on the mounting plate.
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Steve