garyd
Aluminum
- Joined
- Sep 29, 2004
- Location
- Connecticut
Hello Gents;
Back in the ole’ days, way before hydraulics provided a better solution for folks making medallions, jewelry and struck coins, folks used either very large (and very heavy) knuckle presses or gravity drop hammers for the smaller work.
Any chance that one of us has a Blundell & Co. gravity drop hammer coining machine or a functional equivalent who would be willing to correspond with me so that I may learn about the capabilities of these old machines? I’m looking into coining small medallions. A hydraulic option that I’ve tried won’t work to my satisfaction (100 tons). The drop hammer machine looks build-able and would fit into my small shop.
I’d like to get a better understanding of the structure of these antiques, the methods employed to manage the falling weight and an idea of the practical limits of these machines. I’ve calculated the kinetic energy of a falling weight accelerated by gravity and the potential for work is amazing. The pic below is of a Blundell machine removed from service after more than 100 years.
Gary
Back in the ole’ days, way before hydraulics provided a better solution for folks making medallions, jewelry and struck coins, folks used either very large (and very heavy) knuckle presses or gravity drop hammers for the smaller work.
Any chance that one of us has a Blundell & Co. gravity drop hammer coining machine or a functional equivalent who would be willing to correspond with me so that I may learn about the capabilities of these old machines? I’m looking into coining small medallions. A hydraulic option that I’ve tried won’t work to my satisfaction (100 tons). The drop hammer machine looks build-able and would fit into my small shop.
I’d like to get a better understanding of the structure of these antiques, the methods employed to manage the falling weight and an idea of the practical limits of these machines. I’ve calculated the kinetic energy of a falling weight accelerated by gravity and the potential for work is amazing. The pic below is of a Blundell machine removed from service after more than 100 years.
Gary