06-18-2014, 11:15 AM
An Archimedes Screw, a pump built with this would not need to rotate in a tube its only necessary to rotate the tube with the screw fixed inside the only maintenance necessary would be to occasionally re-grease or replace the bearings at the ends.
The cross bow brooch screw I think could just use a pin for the internal "screw" although I don't recall seeing one. The construction of the thread could be a piece of square wire wrapped round a rod and hard soldered together, this I think could be done on a larger scale with iron and forge welded together.
The Nail hoard from Inchtuthil containing 800,000 nails presumably for construction, included to my knowledge not a single screw.
http://www.romanscotland.org.uk/pages/na...lhoard.asp
Theoretically and Practically though its possible for a Roman Blacksmith to make a Tap and Die for producing a matching internal and external thread for nuts and bolts etc Providing a suitable piece of steel is available for the purpose.
However a plain wooden or metal "bolt" with a wedge in the end is far simpler and would serve the same purpose as a threaded Nut and Bolt although made for a single purpose, this I've made on numerous occasions largely to hold loom and lathe parts together so they can be easily assembled/disassembled.
The cross bow brooch screw I think could just use a pin for the internal "screw" although I don't recall seeing one. The construction of the thread could be a piece of square wire wrapped round a rod and hard soldered together, this I think could be done on a larger scale with iron and forge welded together.
The Nail hoard from Inchtuthil containing 800,000 nails presumably for construction, included to my knowledge not a single screw.
http://www.romanscotland.org.uk/pages/na...lhoard.asp
Theoretically and Practically though its possible for a Roman Blacksmith to make a Tap and Die for producing a matching internal and external thread for nuts and bolts etc Providing a suitable piece of steel is available for the purpose.
However a plain wooden or metal "bolt" with a wedge in the end is far simpler and would serve the same purpose as a threaded Nut and Bolt although made for a single purpose, this I've made on numerous occasions largely to hold loom and lathe parts together so they can be easily assembled/disassembled.
Ivor
"And the four bare walls stand on the seashore. a wreck a skeleton a monument of that instability and vicissitude to which all things human are subject. Not a dwelling within sight, and the farm labourer, and curious traveller, are the only persons that ever visit the scene where once so many thousands were congregated." T.Lewin 1867
"And the four bare walls stand on the seashore. a wreck a skeleton a monument of that instability and vicissitude to which all things human are subject. Not a dwelling within sight, and the farm labourer, and curious traveller, are the only persons that ever visit the scene where once so many thousands were congregated." T.Lewin 1867
