Who invented the metal bolt, nut, spanner, screw, screwdriver, first standard screw thread?
Rivets were used before bolts. A screw thread in wood can be made by what is essentially whittling.
But I can’t see how it can be possible to make a metal screw thread without already having a metal screw thread. Unless …
mollwollfumble said:
Who invented the metal bolt, nut, spanner, screw, screwdriver, first standard screw thread?Rivets were used before bolts. A screw thread in wood can be made by what is essentially whittling.
But I can’t see how it can be possible to make a metal screw thread without already having a metal screw thread. Unless …
Archimedes’ screw has been around for a year or two. Perhaps someone looked at one of those and thought “what it?”.
interesting question.
seems they were used in printing and wine presses for hundreds of years before the idea was adapted into a metal fastener system.
mollwollfumble said:
Whitworth.
Who invented the metal bolt, nut, spanner, screw, screwdriver, first standard screw thread?Rivets were used before bolts. A screw thread in wood can be made by what is essentially whittling.
But I can’t see how it can be possible to make a metal screw thread without already having a metal screw thread. Unless …
See:
https://en.wikipedia.org/wiki/British_Standard_Whitworth
https://en.wikipedia.org/wiki/Screw_thread#History_of_standardization
Michael V said:
Also:
mollwollfumble said:Whitworth.
Who invented the metal bolt, nut, spanner, screw, screwdriver, first standard screw thread?Rivets were used before bolts. A screw thread in wood can be made by what is essentially whittling.
But I can’t see how it can be possible to make a metal screw thread without already having a metal screw thread. Unless …
See:
https://en.wikipedia.org/wiki/British_Standard_Whitworth
https://en.wikipedia.org/wiki/Screw_thread#History_of_standardization
https://en.wikipedia.org/wiki/Screw-cutting_lathe
Michael V said:
Michael V said:Also:
mollwollfumble said:Whitworth.
Who invented the metal bolt, nut, spanner, screw, screwdriver, first standard screw thread?Rivets were used before bolts. A screw thread in wood can be made by what is essentially whittling.
But I can’t see how it can be possible to make a metal screw thread without already having a metal screw thread. Unless …
See:
https://en.wikipedia.org/wiki/British_Standard_Whitworth
https://en.wikipedia.org/wiki/Screw_thread#History_of_standardization
https://en.wikipedia.org/wiki/Screw-cutting_lathe
Some good work there Michael.
https://en.wikipedia.org/wiki/Wrench#History
https://en.wikipedia.org/wiki/Screwdriver#History
Peak Warming Man said:
Michael V said:
Michael V said:Also:
Whitworth.See:
https://en.wikipedia.org/wiki/British_Standard_Whitworth
https://en.wikipedia.org/wiki/Screw_thread#History_of_standardization
https://en.wikipedia.org/wiki/Screw-cutting_lathe
Some good work there Michael.
No worries.
;)
Michael V said:
Peak Warming Man said:
Michael V said:Also:https://en.wikipedia.org/wiki/Screw-cutting_lathe
Some good work there Michael.
No worries.
;)
Hehe
It’s pretty easy to make a metal wood screw with a length of brass and a file. Trade teachers are renowned for setting such tasks to teach patience and perseverance, lateral thinking and adaptability.
Michael V said:
Michael V said:Also:
mollwollfumble said:Whitworth.
Who invented the metal bolt, nut, spanner, screw, screwdriver, first standard screw thread?Rivets were used before bolts. A screw thread in wood can be made by what is essentially whittling.
But I can’t see how it can be possible to make a metal screw thread without already having a metal screw thread. Unless …
See:
https://en.wikipedia.org/wiki/British_Standard_Whitworth
https://en.wikipedia.org/wiki/Screw_thread#History_of_standardization
https://en.wikipedia.org/wiki/Screw-cutting_lathe
Not quite there yet. A screw cutting lathe needs a screw thread to drive the cutting tool that cuts the screw thread.
So where did the screw thread in the thread cutting lathe come from?
mollwollfumble said:
So where did the screw thread in the thread cutting lathe come from?
God made it.
mollwollfumble said:
Michael V said:
Michael V said:Also:
Whitworth.See:
https://en.wikipedia.org/wiki/British_Standard_Whitworth
https://en.wikipedia.org/wiki/Screw_thread#History_of_standardization
https://en.wikipedia.org/wiki/Screw-cutting_lathe
Not quite there yet. A screw cutting lathe needs a screw thread to drive the cutting tool that cuts the screw thread.
So where did the screw thread in the thread cutting lathe come from?
Do you know about Tap ‘n Die tools?
mollwollfumble said:
Michael V said:
Michael V said:Also:
Whitworth.See:
https://en.wikipedia.org/wiki/British_Standard_Whitworth
https://en.wikipedia.org/wiki/Screw_thread#History_of_standardization
https://en.wikipedia.org/wiki/Screw-cutting_lathe
Not quite there yet. A screw cutting lathe needs a screw thread to drive the cutting tool that cuts the screw thread.
So where did the screw thread in the thread cutting lathe come from?
They used to cut rifling in pistols by hand. Slow and expensive but it can be done.
Rule 303 said:
mollwollfumble said:
Michael V said:Also:https://en.wikipedia.org/wiki/Screw-cutting_lathe
Not quite there yet. A screw cutting lathe needs a screw thread to drive the cutting tool that cuts the screw thread.
So where did the screw thread in the thread cutting lathe come from?
Do you know about Tap ‘n Die tools?
Thanks, I was looking for a reference to that. Not by that name, but I had seen one. That’s the only way to cut an internal thread, but you need an external thread on the Tap ‘n Die tool to start with.
> They used to cut rifling in pistols by hand. Slow and expensive but it can be done.
Rifling doesn’t have to have accurate pitch. Any old variation in pitch will do.
> Wine and printing presses.
Good point. The threads there would initially have been made of wood? So we owe the origins of the bolt and nut to intoxicating liquor. It figures.
Look. I can see two possibilities. One is that some craftsman with a triangular file cut a spiral groove in some metal, such as brass, by hand. That’s still not good enough on its own unless someone sand-cast the first metal nut around the screw and finished the casting by hand using, for instance, a polishing compound between screw and nut.
The other possibility is a tool that I’ve never seen but I think could be made. A hand-operated tool to make a double start thread could be made without the need for a screw thread to start it. Using a pair of wheel and axles set opposite one another mounted in a sand cast body. Each wheel is of a hardened material such as tool steel, rhombus in cross section with a pointed rim. Like this.
The wheels and axles could be made by hand or, easier and better, made in a lathe which was of rivetted construction.
By using axles that are not parallel to each other, the wheels could press double-start threads into a soft material such as brass or (possibly) annealed steel. The sand cast body would include handles, and look something like this, but containing the tool steel wheels.
Then sand-cast a nut around it, as before.
Once a double start thread was made, the use of gearing would allow it to be used on a thread-cutting lathe to make a single start thread, I think. Yes, it would. As well as making the thread cut depth more uniform, and changing the diameter, pitch and depth of the screw.
Michael V said:
https://en.wikipedia.org/wiki/Wrench#Historyhttps://en.wikipedia.org/wiki/Screwdriver#History
Wrench before spanner. That makes sense. A screwdriver can be easily made from a metal rod by a blacksmith.
mollwollfumble said:
Rule 303 said:
mollwollfumble said:Do you know about Tap ‘n Die tools?
Thanks, I was looking for a reference to that. Not by that name, but I had seen one. That’s the only way to cut an internal thread, but you need an external thread on the Tap ‘n Die tool to start with.
> They used to cut rifling in pistols by hand. Slow and expensive but it can be done.
Rifling doesn’t have to have accurate pitch. Any old variation in pitch will do.
> Wine and printing presses.
Good point. The threads there would initially have been made of wood? So we owe the origins of the bolt and nut to intoxicating liquor. It figures.
Look. I can see two possibilities. One is that some craftsman with a triangular file cut a spiral groove in some metal, such as brass, by hand. That’s still not good enough on its own unless someone sand-cast the first metal nut around the screw and finished the casting by hand using, for instance, a polishing compound between screw and nut.
The other possibility is a tool that I’ve never seen but I think could be made. A hand-operated tool to make a double start thread could be made without the need for a screw thread to start it. Using a pair of wheel and axles set opposite one another mounted in a sand cast body. Each wheel is of a hardened material such as tool steel, rhombus in cross section with a pointed rim. Like this.
The wheels and axles could be made by hand or, easier and better, made in a lathe which was of rivetted construction.
By using axles that are not parallel to each other, the wheels could press double-start threads into a soft material such as brass or (possibly) annealed steel. The sand cast body would include handles, and look something like this, but containing the tool steel wheels.
Then sand-cast a nut around it, as before.
Once a double start thread was made, the use of gearing would allow it to be used on a thread-cutting lathe to make a single start thread, I think. Yes, it would. As well as making the thread cut depth more uniform, and changing the diameter, pitch and depth of the screw.
Michael V said:
https://en.wikipedia.org/wiki/Wrench#Historyhttps://en.wikipedia.org/wiki/Screwdriver#History
Wrench before spanner. That makes sense. A screwdriver can be easily made from a metal rod by a blacksmith.
There is a third possibility, but i don’t recommend it. Draw wire through a triangular dye to make triangular wire. Then glue the triangular wire around a rod to make a screw thread. The onlybreal advantage of this is that a nut could be made the same way. Not suitable for a fastening, but possible for a template screw for a thread-cutting lathe.
What about a thread-rolling flat dye? Simply cut by lathe without need for a screw thread?
This web link is interesting: The history of hardware tools describes the origins of the chain saw, circular saw and wrench.
It’s difficult to find on the web the origin of the spanner because Americans use the word “wrench” to refer to all three of wrench, spanner and shifting spanner. This image from 1834 is supposed to be the first spanner, but it is clearly an advanced form.
you could cut a thread using a rack and pinion to guide the cutting tool while the work rotated.
http://homepages.ihug.com.au/~dispater/turning.htm
https://www.gracesguide.co.uk/Henry_Maudslay:_Machine_Tools
ChrispenEvan said:
you could cut a thread using a rack and pinion to guide the cutting tool while the work rotated.
Thanks.
I was beginning to wonder about that. The rack would be moving at right angles to the shaft rotation. It would need to be parallel.
Using bevel gears to get the rack to move at the right speed relative to the shaft rotation speed? Hand cut gears? Or a universal joint? Or a 90 degree angle change using a belt drive?
mollwollfumble said:
ChrispenEvan said:
you could cut a thread using a rack and pinion to guide the cutting tool while the work rotated.
Thanks.
I was beginning to wonder about that. The rack would be moving at right angles to the shaft rotation. It would need to be parallel.
Using bevel gears to get the rack to move at the right speed relative to the shaft rotation speed? Hand cut gears? Or a universal joint? Or a 90 degree angle change using a belt drive?
machine tool fixed to rack. rack can slide. pinion driven by gears to give correct thread per inch count. pinion rotates, rack slides cutting thread while work is being spun.
ChrispenEvan said:
mollwollfumble said:
ChrispenEvan said:
you could cut a thread using a rack and pinion to guide the cutting tool while the work rotated.
Thanks.
I was beginning to wonder about that. The rack would be moving at right angles to the shaft rotation. It would need to be parallel.
Using bevel gears to get the rack to move at the right speed relative to the shaft rotation speed? Hand cut gears? Or a universal joint? Or a 90 degree angle change using a belt drive?
machine tool fixed to rack. rack can slide. pinion driven by gears to give correct thread per inch count. pinion rotates, rack slides cutting thread while work is being spun.
you only need to accurately turn a short length of thread and from that you can then make longer and longer sections. first threads were hand cut though.
ChrispenEvan said:
ChrispenEvan said:
mollwollfumble said:Thanks.
I was beginning to wonder about that. The rack would be moving at right angles to the shaft rotation. It would need to be parallel.
Using bevel gears to get the rack to move at the right speed relative to the shaft rotation speed? Hand cut gears? Or a universal joint? Or a 90 degree angle change using a belt drive?
machine tool fixed to rack. rack can slide. pinion driven by gears to give correct thread per inch count. pinion rotates, rack slides cutting thread while work is being spun.
you only need to accurately turn a short length of thread and from that you can then make longer and longer sections. first threads were hand cut though.
You can also make rolled threads: 
History of the Bolt
https://www.nord-lock.com/insights/knowledge/2017/the-history-of-the-bolt/
While the history of threads can be traced back to 400 BC, the most significant developments in the modern day bolt and screw processes were made during the last 150 years. Experts differ as to the origins of the humble nut and bolt. In his article “Nuts and Bolts”, Frederick E. Graves argues that a threaded bolt and a matching nut serving as a fastener only dates back to the 15th century. He bases this conclusion on the first printed record of screws appearing in a book in the early 15th century.
However, Graves also acknowledges that even though the threaded bolt dates back to the 15th century, the unthreaded bolt goes back to Roman times when it was used for “barring doors, as pivots for opening and closing doors and as wedge bolts: a bar or a rod with a slot in which a wedge was inserted so that the bolt could not be moved.” He also implies that the Romans developed the first screw, which was made out of bronze, or even silver. The threads were filed by hand or consisted of a wire wound around a rod and soldered on.
According to bolt expert Bill Eccles’ research, the history of the screw thread goes back much further. Archimedes (287 BC–212 BC) developed the screw principle and used it to construct devices to raise water. However, there are signs that the water screw may have originated in Egypt before the time of Archimedes. It was constructed from wood and was used to irrigate land and remove bilge water from ships. “But many consider that the screw thread was invented around 400 BC by Archytas of Tarentum, who has often been called the founder of mechanics and considered a contemporary of Plato,” Eccles writes on his website.
The history can be broken down into two parts: the threads themselves that date back to around 400 BC when they were used for items such as a spiral for lifting water, presses for grapes to make wine, and the fasteners themselves, which have been in use for around 400 years….
There’s a couple of excellent books on this very subject.
I’ve read One Good Turn: A Natural History of the Screwdriver and the Screw and I’ve just ordered Exactly: How Precision Engineers Created the Modern World .
I was a bit apprehensive about the first one being interesting, but it ended up being one of my favourite reads. I’m very much looking forwards to the new book. Note that the links provided are to ABE Books, which have an excellent number of bookshops to draw from, to get all manner of books affordably.
Just when my head was threatening to drift away and abandon my neck altogether the forum starts into utterly facninating numbers and chinese passwords. Then I notice the Nuts and Bolts thread.. oooo, great stuff
(scratches head, if I can find it, and wonders) How do they manufacture nuts?
https://en.m.wikipedia.org/wiki/Nut_ Manufacture, gives only this..
Anyway, this is smashing viewing..
Sorry, I just this was amusing … :)
Spiny Norman said:
Sorry, I just this was amusing … :)
Screwy :)
—
Do you know about Tap ‘n Die tools?
I have a small set and a great big heavy duty one for threading pipes.. never use either of them.
Ian said:
Spiny Norman said:
Sorry, I just this was amusing … :)
Screwy :)
—
Do you know about Tap ‘n Die tools?I have a small set and a great big heavy duty one for threading pipes.. never use either of them.
You could start a museum.
PermeateFree said:
Ian said:
Spiny Norman said:
Sorry, I just this was amusing … :)
Screwy :)
—
Do you know about Tap ‘n Die tools?I have a small set and a great big heavy duty one for threading pipes.. never use either of them.
You could start a museum.
Or hold a sale.
Ian said:
Spiny Norman said:
Sorry, I just this was amusing … :)
Screwy :)
—
Do you know about Tap ‘n Die tools?I have a small set and a great big heavy duty one for threading pipes.. never use either of them.
That’s nuts.
Ian said:
—
Do you know about Tap ‘n Die tools?
Yep.
Spiny Norman said:
Ian said:
—
Do you know about Tap ‘n Die tools?Yep.
Can tap a thread on a pin.
Ian said:
Anyway, this is smashing viewing..
Really enjoyed that, thanks. So the thread is rolled using a pair of flat plates.
mollwollfumble said:
Ian said:Anyway, this is smashing viewing..
Really enjoyed that, thanks. So the thread is rolled using a pair of flat plates.
They aren’t really8 fflat. Some parts of them are at varying depths.
This is a good thread.
Peak Warming Man said:
This is a good thread.
Both left and right can get along as long as you think before you tighten.
Peak Warming Man said:
This is a good thread.
i nearly didn’t read it because, bolt, nut etc.
ChrispenEvan said:
Peak Warming Man said:
This is a good thread.
i nearly didn’t read it because, bolt, nut etc.
You just don’t do enough screwing.
Peak Warming Man said:
This is a good thread.
It’s a fine thread indeed
pommiejohn said:
Peak Warming Man said:
This is a good thread.
It’s a fine thread indeed
Seiko watch stems can be .05mm and they are very hard and brittle. It is difficult to get a good pair of end nippers that will cut it off at the precise point you desire rather than break at any lower point.
roughbarked said:
pommiejohn said:
Peak Warming Man said:
This is a good thread.
It’s a fine thread indeed
Seiko watch stems can be .05mm and they are very hard and brittle. It is difficult to get a good pair of end nippers that will cut it off at the precise point you desire rather than break at any lower point.
The trick with cutting replacement stems was always to grasp it at the point reqired and pull the stem out to the hand set position, then do your snipping and a lot of the enerrgy is absorbed into pulling the stem back into the winding position.
pommiejohn said:
Peak Warming Man said:
This is a good thread.
It’s a fine thread indeed
Probably BSF or BSC.
roughbarked said:
roughbarked said:
pommiejohn said:It’s a fine thread indeed
Seiko watch stems can be .05mm and they are very hard and brittle. It is difficult to get a good pair of end nippers that will cut it off at the precise point you desire rather than break at any lower point.
The trick with cutting replacement stems was always to grasp it at the point reqired and pull the stem out to the hand set position, then do your snipping and a lot of the enerrgy is absorbed into pulling the stem back into the winding position.
After that, one has to file the sharp edges down so the crown doesn’t get cross threaded when screwing on. This is another time where the brittle nature of the stem itself will lend to snapping a catch to midwicket if you dont use soft hands.
pommiejohn said:
Peak Warming Man said:
This is a good thread.
It’s a fine thread indeed
it is the acme of threads.
The other day on railways Michael Portillo went to a needle factory, again mass production using wires and presses. He said back in the day a packet of English needles would buy you a wife in the Sudan.
ChrispenEvan said:
pommiejohn said:
Peak Warming Man said:
This is a good thread.
It’s a fine thread indeed
it is the acme of threads.
Dial screws on older Swiss watches are indeed very fine threads on very fine screws of quite long thread lengths. Can be very short and very tiny as well.
The thread on the stud screw which holds the balance to the cock, well that is an even finer thing of much greater beauty.
ChrispenEvan said:
pommiejohn said:
Peak Warming Man said:
This is a good thread.
It’s a fine thread indeed
it is the acme of threads.
thought i’d just pitch that in.
AwesomeO said:
The other day on railways Michael Portillo went to a needle factory, again mass production using wires and presses. He said back in the day a packet of English needles would buy you a wife in the Sudan.
An Aboriginal historian told me that before white men actually arrived here, a steel axe could cost you two wives.
ChrispenEvan said:
ChrispenEvan said:
pommiejohn said:It’s a fine thread indeed
it is the acme of threads.
thought i’d just pitch that in.
It is a cant that is acceptable.
AwesomeO said:
The other day on railways Michael Portillo went to a needle factory, again mass production using wires and presses. He said back in the day a packet of English needles would buy you a wife in the Sudan.
What’s the price for a Sudanese wife now?
party_pants said:
AwesomeO said:
The other day on railways Michael Portillo went to a needle factory, again mass production using wires and presses. He said back in the day a packet of English needles would buy you a wife in the Sudan.
What’s the price for a Sudanese wife now?
A Japanese 4×4.
party_pants said:
AwesomeO said:
The other day on railways Michael Portillo went to a needle factory, again mass production using wires and presses. He said back in the day a packet of English needles would buy you a wife in the Sudan.
What’s the price for a Sudanese wife now?
A case of Cullinan diamonds
party_pants said:
AwesomeO said:
The other day on railways Michael Portillo went to a needle factory, again mass production using wires and presses. He said back in the day a packet of English needles would buy you a wife in the Sudan.
What’s the price for a Sudanese wife now?
tree fiddy.
AwesomeO said:
party_pants said:
AwesomeO said:
The other day on railways Michael Portillo went to a needle factory, again mass production using wires and presses. He said back in the day a packet of English needles would buy you a wife in the Sudan.
What’s the price for a Sudanese wife now?
A Japanese 4×4.
Preferably with a mounted .50 cal.
roughbarked said:
ChrispenEvan said:
pommiejohn said:It’s a fine thread indeed
it is the acme of threads.
Dial screws on older Swiss watches are indeed very fine threads on very fine screws of quite long thread lengths. Can be very short and very tiny as well.
The thread on the stud screw which holds the balance to the cock, well that is an even finer thing of much greater beauty.
http://www.ofrei.com/page1014.html
roughbarked said:
AwesomeO said:
party_pants said:What’s the price for a Sudanese wife now?
A Japanese 4×4.
Preferably with a mounted .50 cal.
I’m all out of them.
mollwollfumble said:
Look. I can see two possibilities. One is that some craftsman with a triangular file cut a spiral groove in some metal, such as brass, by hand. That’s still not good enough on its own unless someone sand-cast the first metal nut around the screw and finished the casting by hand using, for instance, a polishing compound between screw and nut.
The other possibility is a tool that I’ve never seen but I think could be made. A hand-operated tool to make a double start thread could be made without the need for a screw thread to start it. Using a pair of wheel and axles set opposite one another mounted in a sand cast body. Each wheel is of a hardened material such as tool steel, rhombus in cross section with a pointed rim. Like this.
The wheels and axles could be made by hand or, easier and better, made in a lathe which was of rivetted construction.
By using axles that are not parallel to each other, the wheels could press double-start threads into a soft material such as brass or (possibly) annealed steel. The sand cast body would include handles, and look something like this, but containing the tool steel wheels.
Once a double start thread was made, the use of gearing would allow it to be used on a thread-cutting lathe to make a single start thread, I think. Yes, it would. As well as making the thread cut depth more uniform, and changing the diameter, pitch and depth of the screw.
There is a third possibility, but i don’t recommend it. Draw wire through a triangular dye to make triangular wire. Then glue the triangular wire around a rod to make a screw thread. The only real advantage of this is that a nut could be made the same way. Not suitable for a fastening, but possible for a template screw for a thread-cutting lathe.
What about a thread-rolling flat dye? Simply cut by lathe without need for a screw thread?
Ian said:
Anyway, this is smashing viewing. The thread-rolling flat dye in action.
A hand-operated tool could make a single start thread using a couple of rollers, too. Hot forge. That’s how I’d do it, if I wanted to kick-start the threaded bolt technology from scratch. I’d make the rollers on a rivetted lathe.
—-
The flat dye rolling method could also be made without a thread to start with. Even by hand without a lathe.
Start by making something that looks like a saw, but has even triangular teeth. May as well do this with a file.
Strengthen by heat treatment and clamping between thick plates.
Set a rectangular plate at a small angle, and drag (by hand will do) the saw sideways across it, cutting slots. By hand, slowly deepening the grooves.
Repeat with a second plate. Harden by heat treatment.
Then make the thread on the bolt exactly as in the video. But again by hand and hot forging.
Take one bolt made this way and cut three or four wide grooves down its length. Harden by heat treatment. You now have a tap-n-dye tool for making nuts.
A little cutting paste on a bolt will increase the clearance between bold and nut.
Done, and not a lathe in sight.
mollwollfumble said:
mollwollfumble said:Look. I can see two possibilities. One is that some craftsman with a triangular file cut a spiral groove in some metal, such as brass, by hand. That’s still not good enough on its own unless someone sand-cast the first metal nut around the screw and finished the casting by hand using, for instance, a polishing compound between screw and nut.
The other possibility is a tool that I’ve never seen but I think could be made. A hand-operated tool to make a double start thread could be made without the need for a screw thread to start it. Using a pair of wheel and axles set opposite one another mounted in a sand cast body. Each wheel is of a hardened material such as tool steel, rhombus in cross section with a pointed rim. Like this.
The wheels and axles could be made by hand or, easier and better, made in a lathe which was of rivetted construction.
By using axles that are not parallel to each other, the wheels could press double-start threads into a soft material such as brass or (possibly) annealed steel. The sand cast body would include handles, and look something like this, but containing the tool steel wheels.
Once a double start thread was made, the use of gearing would allow it to be used on a thread-cutting lathe to make a single start thread, I think. Yes, it would. As well as making the thread cut depth more uniform, and changing the diameter, pitch and depth of the screw.
There is a third possibility, but i don’t recommend it. Draw wire through a triangular dye to make triangular wire. Then glue the triangular wire around a rod to make a screw thread. The only real advantage of this is that a nut could be made the same way. Not suitable for a fastening, but possible for a template screw for a thread-cutting lathe.
What about a thread-rolling flat dye? Simply cut by lathe without need for a screw thread?
Ian said:
Anyway, this is smashing viewing. The thread-rolling flat dye in action.
A hand-operated tool could make a single start thread using a couple of rollers, too. Hot forge. That’s how I’d do it, if I wanted to kick-start the threaded bolt technology from scratch. I’d make the rollers on a rivetted lathe.
—-
The flat dye rolling method could also be made without a thread to start with. Even by hand without a lathe.
Start by making something that looks like a saw, but has even triangular teeth. May as well do this with a file.
Strengthen by heat treatment and clamping between thick plates.Set a rectangular plate at a small angle, and drag (by hand will do) the saw sideways across it, cutting slots. By hand, slowly deepening the grooves.
Repeat with a second plate. Harden by heat treatment.Then make the thread on the bolt exactly as in the video. But again by hand and hot forging.
Take one bolt made this way and cut three or four wide grooves down its length. Harden by heat treatment. You now have a tap-n-dye tool for making nuts.
A little cutting paste on a bolt will increase the clearance between bold and nut.
Done, and not a lathe in sight.
>>>tap-n-dye
Poor nomenclature that has been used throughout this thread. There is no such thing as a tap-n-dye tool (nor tap-n-die tool). Taps and dies are often purchased in sets – tap and die sets.
I have made taps to repair damaged threads by hand-shaping a bolt.
Likewise, I have made dies to repair damaged threads by hand- shaping a nut.
Poor nomenclature that has been used throughout this thread.
—
We can’t have that. It’s my not fault.. well only a bit :)
This the sort of small Tap and die set to which I referred.
My reference to a large tap and die set should have read just “die set” (only used on gal pipe, with female joiners, before poly pipe took over).
Molly misquotes me referring to a “dye”.
Ian said:
Poor nomenclature that has been used throughout this thread.—
We can’t have that. It’s my not fault.. well only a bit :)This the sort of small Tap and die set to which I referred.
My reference to a large tap and die set should have read just “die set” (only used on gal pipe, with female joiners, before poly pipe took over).
Molly misquotes me referring to a “dye”.
Yeah, I noticed. I have a cheap, useless junk-metal metric tap and die set. Really only good for cleaning threads. I however have both tap and dies made by P&N (Patience & Nicholson) and Sutton, both good quality brands, bought for individual jobs. I also have some large square pipe dies, that match no threads whatsoever. And a big hand-forged-steel die-handle (not for those dies).
I also have a blacksmith-made adjustable square-jaw wrench. Its square thread must have been forged before the handle was twisted and the jaws were forged. Unfortunately the adjuster-nut has rusted to the thread. I’d love to fix that. Perhaps one day I’ll try electrolytic rust removal.
a Russian small ladies watch I had to find a screw for.
roughbarked said:
a Russian small ladies watch I had to find a screw for.
Can you guess which screw I provided?
roughbarked said:
a Russian small ladies watch I had to find a screw for.
What do Russian watches for large ladies look like?
The Rev Dodgson said:
roughbarked said:
a Russian small ladies watch I had to find a screw for.
What do Russian watches for large ladies look like?
:)
Gent’s watches.The Rev Dodgson said:
roughbarked said:
a Russian small ladies watch I had to find a screw for.
What do Russian watches for large ladies look like?
In Soviet Union, large Russian ladies wear you.
roughbarked said:
roughbarked said:
a Russian small ladies watch I had to find a screw for.
Can you guess which screw I provided?
In case you are guessing, there are actually two.
roughbarked said:
roughbarked said:
roughbarked said:
a Russian small ladies watch I had to find a screw for.
Can you guess which screw I provided?
In case you are guessing, there are actually two.
In my case, I was full of wonder at how well the Russians could copy a Swiss design and translate it into something that almost looks completely different but yet the same. I was inclined to think that maybe they’d bought one of the ETA movement designs thta ETA had decided not to use. I actually replaced the missing screws with Swiss screws from ETA movements.
In putting it back together.
