Fast mill (cheap) vise for large objects

[ibewgypsie]

Another quickie. I needed a large vise for some plate I had to cnc drill. I had some heavy 3x3 angle laying around with a old screw jack from a furrin jap car. I laid the jack on it's side and welded it to center of one angle cut to width cnc table, I had predrilled holes width of slots on table on 3 pieces. I laid another piece on table protecting table with A-cloth and tacked on angle to top of jack, other piece is back up on other side of table. I tacked in some 3/8 keystock to space plate off table. You adjust jack in, insert plate between angle on top of keystock, tighten jack, tighten slot bolts and drill away.
Only problem I see is that I have to manually move angle since the jack only is forced one way and dependent on gravity to retract. Perhaps a couple of springs? Air cylinders in place of jack? anyways..

Later, this job is done. I need a place to store all this junk I have prefabricated.

Value=need at present time.

[Alistair Hosie]

surely Ibew there is nothing wrong with using whatever is to hand so long as it is safe to hold down a job for a one time series of cuts,I hyave even read about wood being used to make a hold down device so long as it is well thought out and bolted down whats the harm. I think Sperey actually promotes this idea himself saying that it may not look pretty but if it gets you out of a hole why not regards your old pal Alistair.
ps hows the S&M farm doing need to go the cookies are nearly done can't keep the cutomers waiting http://bbs.homeshopmachinist.net//biggrin.gif http://bbs.homeshopmachinist.net//biggrin.gif