Author Topic: Tool 1  (Read 54503 times)

rustyengines

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Re: Tool 1
« Reply #270 on: 09 June, 2018, 05:54:23 pm »
Hi John Trying to type and think at the same time
The TPI is the same
Ian
Southern Cross Engines, Lawn Mowers and old tools * TOWNSVILLE

wee-allis

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Re: Tool 1
« Reply #271 on: 10 June, 2018, 09:07:03 am »
Hi Ian,
With the TPI being the same for all diameters, what are the chances of it being BSF?
If it's old, treat it like gold.
C1300 Inter, 38 Allis B,47 VAK1A David Brown,48 TEA Fergie, 53 Morris Six,  Moruya, Sth coast NSW.

franco

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Re: Tool 1
« Reply #272 on: 10 June, 2018, 11:50:37 am »
Hi Ian,
With the TPI being the same for all diameters, what are the chances of it being BSF?

Don't think so. I have a set of BSF taps and dies from 1/4" to 1/2", and the TPI is different for each size. If they are 26 TPI they could be either BSB or BSC ( brass or cycle) threads, if they are 32 or 40 TPI they could be ME series 32 or 40 threads, but they might also not comply with any modern standard.

I have seen a few old screw plates which cut completely non standard threads. This one is interesting in having removable dies - I suppose it would be called a die plate??? Most of the ones I have seen had the thread cutting (or forming) holes as part of the tool steel screw plate. I think in some trades like gunsmiths they survived until relatively recent times.

Frank.

A bit of history here:
https://www.theexplora.com/the-screw-plate-cutting-sizing-thread-pre-whitworth-standard-of-1841/
Cairns, Queensland

Scott

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Re: Tool 1
« Reply #273 on: 10 June, 2018, 05:25:48 pm »
If they are 26 TPI they could be either BSB or BSC ( brass or cycle) threads
BSB would be interesting.  :)

Cheers Scott

rustyengines

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Re: Tool 1
« Reply #274 on: 10 June, 2018, 05:31:25 pm »
Hi Frank
The pitch is the same on the die thickness 8 threads on all of them
Which makes it interesting as to what thread it is
Ian
Southern Cross Engines, Lawn Mowers and old tools * TOWNSVILLE

rustyengines

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Re: Tool 1
« Reply #275 on: 10 June, 2018, 05:34:48 pm »
Hi Scott YES I would say Brass thread
Ian
https://britishfasteners.com/threads/bsb.html
Southern Cross Engines, Lawn Mowers and old tools * TOWNSVILLE

cobbadog

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Re: Tool 1
« Reply #276 on: 11 June, 2018, 11:20:00 am »
I just went back and look at what diameter they would fit and it appears to have 3 different diameter dies. If it is BSB I then wonder what trade it would have been used in.
Cheers, John & Dee. Coopernook. NSW.

Kim S

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Re: Tool 1
« Reply #277 on: 11 June, 2018, 11:46:24 am »
I'm a little surprised no one knows what this is? .....blacksmith die used in conjunction with tapered taps for the pre standardized  old style custom made fasteners.

rustyengines

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Re: Tool 1
« Reply #278 on: 11 June, 2018, 03:45:24 pm »
The die is not tapered and when you work out the thread per inch it is 26 TPI which is a Brass thread
Mine is made in the UK you can just see it
What you have shown is a 'tap holder and 3 sizes' for the different size tapered taps
Not the tool I have
Ian 
Southern Cross Engines, Lawn Mowers and old tools * TOWNSVILLE

wee-allis

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Re: Tool 1
« Reply #279 on: 11 June, 2018, 03:50:30 pm »

John,
BSB threads were used a lot in the electrical trade in as much as brass conduit in light fittings and the like. I believe they were also used in scientific instruments. BIDSTBC.
Steve.
If it's old, treat it like gold.
C1300 Inter, 38 Allis B,47 VAK1A David Brown,48 TEA Fergie, 53 Morris Six,  Moruya, Sth coast NSW.

Scott

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Re: Tool 1
« Reply #280 on: 11 June, 2018, 05:25:00 pm »
BSB threads were used a lot in the electrical trade in as much as brass conduit in light fittings and the like.
Hello Cobba
Just to expand on what Steve has said, BSB came about because brass pipe usually has a lot thinner wall then steel pipe, hence, the depth of the cut thread on bigger sized brass pipe (ie 1") would virtually cut through the brass pipe. ie the minor diameter of the thread would be smaller then the inside diameter of the pipe. Having 26 TPI for all diameters of brass pipe solved the problem of too deep a thread. 26 tpi has a thread depth of about 0.025 of an inch, so quite shallow.
Make sense? Gees I hope someone can explain it better if it doesn't.

Cheers Scott

Kim S

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Re: Tool 1
« Reply #281 on: 11 June, 2018, 06:34:42 pm »
The dies are not tapered only the taps and it is a blacksmith die, more than one maker made them and I don't see the TPI being relevant in regards to the tool, what is relevant is the way the tool is used, there were many different manufacturers of these.


 http://www.practicalmachinist.com/vb/antique-machinery-and-history/holroyd-j-m-king-waterford-ny-screw-plates-tap-dies-315797/

rustyengines

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Re: Tool 1
« Reply #282 on: 11 June, 2018, 06:56:10 pm »
Great Kim you found a picture

In your ad that is a tap wrench used many of them in my day
I don't know why you keep say 'Blacksmith' ??
NO not a Blacksmith's die could they have them yes, but more likely a F & T
Your ad also says 'Machinist & Steam fitters' now that's where I fit in
TPI is relevant, very much so on which job it is 
Yes of course one item was made by different manufactures  nothing new in that 
There is lot of different 'thread chasers' out there not used by blacksmiths But fitter & turners
Looks like we are touching the "expert" subject
Ian
Southern Cross Engines, Lawn Mowers and old tools * TOWNSVILLE

Kim S

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Re: Tool 1
« Reply #283 on: 11 June, 2018, 06:58:13 pm »
What you have shown is a 'tap holder and 3 sizes' for the different size tapered taps
Not the tool I have
Ian

No, it is a blacksmith die tool and taper taps. 

rustyengines

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Re: Tool 1
« Reply #284 on: 11 June, 2018, 07:28:50 pm »
Hi Kim please read your ad
I don't why you think that it is ONLY a blacksmith's tool sorry you are wrong
He we go I'm an expert
Ian
Southern Cross Engines, Lawn Mowers and old tools * TOWNSVILLE