I just spent most of the last 2 days standing in front of the Lathe making parts for a light duty Jib crane.
When I built the shop I had this in mind and now is the time to get on with it.
To start there is a full cubic yard of concrete with 8 5/8th's J bolts as a base under the slab, the J bolts were tied into the Rebar as well so that is covered.
I have been collecting materials for this build for about 2 years and as of a few weeks ago I sourced the last needed items.
The first job was to take a 18" length of 1018 3 1/2" round and make it into the pivot shaft, 5 inches remained 3 1/2" to weld into the post, the next 10.5" were turned down to 2" and the last 2.5" turned down to 1.5" and threaded for a 1.5-6 nut.
Once the pivot shaft was turned to size it was on to the UHMW bushings, since I don't have a boring bar that long I did it in 2 pieces, started with 2 6" pieces, Had to mount them in the 4 jaw chuck to bore the 2" hole through the center, once that was done I switched back to the 3 jaw to turn the outside, .75" remained at the 4" nominal and the rest was turned for a tight slip fit in the pivot tube.
Then I needed some washers, 3/8ths" thick 4" od, 2.050 Id, cut these out with the plasma and then mounted them in the 4 jaw and drilled and bored the center hole, once the center was done I switched back to the 3 jaw again so I could hold them from the center hole and turned the outside to 4".
I needed the washers done so I could get the final length for the Bushings, did a trial assembly and I needed to shorten the bushings by .250 each, so back onto the lathe they went and got sized.
While I was waiting for the pivot shaft to cool down for final turning I was able to get a few more things done.
Marked out the 1/2" base plate for the hole pattern.
Cut the 16 gussets.
Cut the I-beam to length and notched it to match the pivot tube, I thought about mounting it in the mill and using a fly cutter to cut the radius but in the end just marked it out and cut it with the plasma cutter and touched it up with the angle grinder.
Cut the 1/4" tube to beam gussets.
Tomorrow I should be able to finish up all the prep before I head into to town for a Dr's appt.
For anyone who is wondering I spec'd this out for 1/2 ton but will probably never exceed 500 pounds since it's main purpose is to lift things onto the mill and lathe.
Friday should be welding day!!
When I built the shop I had this in mind and now is the time to get on with it.
To start there is a full cubic yard of concrete with 8 5/8th's J bolts as a base under the slab, the J bolts were tied into the Rebar as well so that is covered.
I have been collecting materials for this build for about 2 years and as of a few weeks ago I sourced the last needed items.
The first job was to take a 18" length of 1018 3 1/2" round and make it into the pivot shaft, 5 inches remained 3 1/2" to weld into the post, the next 10.5" were turned down to 2" and the last 2.5" turned down to 1.5" and threaded for a 1.5-6 nut.
Once the pivot shaft was turned to size it was on to the UHMW bushings, since I don't have a boring bar that long I did it in 2 pieces, started with 2 6" pieces, Had to mount them in the 4 jaw chuck to bore the 2" hole through the center, once that was done I switched back to the 3 jaw to turn the outside, .75" remained at the 4" nominal and the rest was turned for a tight slip fit in the pivot tube.
Then I needed some washers, 3/8ths" thick 4" od, 2.050 Id, cut these out with the plasma and then mounted them in the 4 jaw and drilled and bored the center hole, once the center was done I switched back to the 3 jaw again so I could hold them from the center hole and turned the outside to 4".
I needed the washers done so I could get the final length for the Bushings, did a trial assembly and I needed to shorten the bushings by .250 each, so back onto the lathe they went and got sized.
While I was waiting for the pivot shaft to cool down for final turning I was able to get a few more things done.
Marked out the 1/2" base plate for the hole pattern.
Cut the 16 gussets.
Cut the I-beam to length and notched it to match the pivot tube, I thought about mounting it in the mill and using a fly cutter to cut the radius but in the end just marked it out and cut it with the plasma cutter and touched it up with the angle grinder.
Cut the 1/4" tube to beam gussets.
Tomorrow I should be able to finish up all the prep before I head into to town for a Dr's appt.
For anyone who is wondering I spec'd this out for 1/2 ton but will probably never exceed 500 pounds since it's main purpose is to lift things onto the mill and lathe.
Friday should be welding day!!
