Hello everyone
Let me then publish the recipe:
Hydraulic jacks> = 5ton.
50cm UPN/E 140 (table);
50cm UPN/E 120 (top);
43cm UPN/E 100 (crosspiece to fix the jack, adjust the measurement when necessary);
4 * 10cm of tube 20mm for the guides of the crosspiece (attention to the tolerances in the drilling of the beams);
2 * 6,5cm in steel L 45mm / 50mm, to fix the crosspiece to the guides;
140cm in steel L 45mm / 40mm for the shelf (50 * 20cm), works like the knees of the legs, and serves to have brass and the various push rods);
2 * 50cm in steel L 45mm / 50mm for foot locking;
2 * 50cm UPN/E 65 ... 80, for the feet;
4 threaded rods of 16mm, steel 8.8, for the press;
2 * 16mm threaded rods, 4.8 steel (normal), to cut in half and make the legs;
8 unions 16mm, 4 to join the rods and 4 to the table;
N 16mm washers;
28 to 32, 16mm nuts;
12 cm of 40mm steel rod for the extractor, turned and with 8mm thread for screwing in the crosspiece, underneath the jack;
2 or 4 springs to raise the crossbar with the jack, with 2 hooks to the top;
N 6mm bolts and nuts to fix the guides on the crossbar, and the fixing of the springs on the guides;
3 * (10cm * 5cm * 3mm) of steel plate to fix the top jack head, or other such invention;
Attention that the welds can shrink the measurements between guides!
Then just paint ...
My drilling was centered at 45cm * 6.5cm, but be aware that it was due to material limitations, because the steel was seized from debris that went to the scrap.
For imperial measures adapt ...
have a good job.
Cheers.
VP
PS: the idea was taken from the net, but it works!
PS2: the table can be lowered or raised as required.