will it coin? even my 10 ton one 1in by 1/8th dia will not. But emboss? yes. More on that technique another time IF youd be interested.
- Where are you? im in Cent S UK. some 2.5 hrs by train fron cent London.
- I you were really interested in proper, as in professional coining youd be welcome to come for a few days to see how its all done.
Now to fly presses. Hand operated, screw, with top arm and weights thereon.
there are basically 3 types.
open throat, deep open throat and arch as in double sided.
They come in sizes from 1 ton to 10 ton. thats the force available on the punch between the base and the douvetail slider that holds the top tool below the screw.
Above 10 ton there friction screw type motor driven.
This one I found in a scrap yard before xmas for $50. Complete! its circa 1950’s B’ham UK made well known maker Sweeny bloxidge height 4ft ,weight 600 lbs 3in dia screw. Std open throat.
Around 6/ ton capacity.
This is my precision press, also 6 ton but uprated to probably 8.
Its closed arch ie has pull down 1in dia load support to prevent spring in the frame. C 1900, the “T” slots in the base are not worn and is accurate to run open tooling ie no die sets.
This is specific for the jewellery trade as the dovetail slider has a 1 in 8tpi thread into which you screw the top tool. In this case im using it to mint a 1/2in dia button that will be the basis of a 4mm nut for my buckle assy. im using the middle of a “viking” victorian cape die.
Next is my drop press.
This is the portable assy of a medium one. anvil base 1/2 ton. total height 10ft. Hammer 275lbs.
approx tonnage 75/100, on a hard conc under base. On soft turf less.
The 4 castings cost me $400.00 in B’ham some 25 yrs ago. To build this complete structure approx 25/30 days. A winter project.
to assemble unload by hand from the commercial 7.5 ton truck, approx 1 day. total expo unit assy some 2 days.
With the right tooling coins ie accurate enough to to strike into a collar consecutive run of 500,
to international coin proof standard.
Back to fly presses, look out for one its such a useful tool for all kinds of work. but that would mean moving from a bench jewellers approach to an industrial production method.
The B’ham jewelley industry moved over to fly presses, drop hammers in the 1880’s and what ive here is just that.
nothing really new except the argon tig etc.
hope its of interest.