Wadkin ags 10 Lock Nut

[samweb132]

Hi fellas! First time posting here!

Been slowly restoring this wadkin ags 10 saw and now got too actually putting a blade on it.
Trouble is I have absolutely no idea what thread this is or where to get one. I know for sure it is a reverse thread. Suspect it is imperial and also suspect it is square not acme.
Can anyone help with sourcing or identifying this thread or how to get a nut for it?

I have already messaged my local machine shop and they were very helpful quoting me websites where I may find a nut for it (but I have no idea which one is the right one) but they said the quote would be around £300-400 as they don't have the skills and tools so would have to take a whole day to do it.
Thanks Sam!

 

[Billy_wizz]

Would it be worth contacting wadkin directly?

 

[Bingy man]

I wouldn’t like to say just from your photo but you could buy a thread checking set from almost anywhere. It’s likely to be imperial but the size and pitch is what you need . Do you have any nuts you could just try for a fit - fingers only - no tools ..
Edit-some excellent and experienced restorers so with a bit of luck one may know exactly what size etc you need / good luck

 

[Distinterior]

.......Is it just me, or does something look bent in that picture...? Optical illusion perhaps?

 

[Bingy man]

.......Is it just me, or does something look bent in that picture...? Optical illusion perhaps?

Looks very like its bends very slightly to the right unless as you say optical illusion. But if you follow the outline of the vernier it does seam to bend ..

 

[SammyQ]

Lads? The very-near's jaws are not parallel to the shaft. Of course it looks wonky!

 

[Distinterior]

Looks very like its bends very slightly to the right unless as you say optical illusion. But if you follow the outline of the vernier it does seam to bend ..

My thoughts exactly! A good clean with a wire wheel may help.

As suggested by yourself, it's most likely to be an imperial thread!

 

[Distinterior]

Lads? The very-near's jaws are not parallel to the shaft. Of course it looks wonky!

Forget the vernier jaws....just look at the arbor thread....it looks bent!

 

[SammyQ]

This is a left hand thread too, don't forget. You SHOULD be able to get one in Blighty. Failing that, it might be an idea to go to OWWM or similar. IIRC, Craftsman or Grizzly had a saw the spitting image of the Waddy 10" box.

Forget the vernier jaws....just look at the arbor thread....it looks bent!

Mehhh...Look at the rhs of the vernier jaw? Because of the macro limitations of the lens used, it looks curved too. I agree, on presentation, the shaft appears bent, but I genuinely believe it is optics, not another issue for the O.P. to deal with.

 

[Amplidyne]

It looks like a "square thread".
As already said, it's odds on it'll be an imperial size and pitch.
Looks like a left hand thread to me.
Measure the diameter, and the pitch, and I'll have a look see if there are details in Machinist's Handbook tomorrow.
Shows you how to measure the pitch here.
https://en.wikipedia.org/wiki/Square_thread_form

 

[samweb132]

Would it be worth contacting wadkin directly?

Contacted them a while ago. Can't remember their exact answer but I believe it was along the lines that is was too old for them to have any info on and threads changed from time to time.

I wouldn’t like to say just from your photo but you could buy a thread checking set from almost anywhere. It’s likely to be imperial but the size and pitch is what you need . Do you have any nuts you could just try for a fit - fingers only - no tools ..
Edit-some excellent and experienced restorers so with a bit of luck one may know exactly what size etc you need / good luck

I haven't yet bought a pitch checkers but believe that they wouldn't work as it is a square thread and i can't seem to find one that does square threads.

.......Is it just me, or does something look bent in that picture...? Optical illusion perhaps?

you scared me for a bit there. But no it is not bent. It is just the calipers and photo at a weird angle.

Thanks for the input so far! Still hoping that i wake up to my angel commenting the exact specifications of the nut tho!!!

 

[samweb132]

It looks like a "square thread".
As already said, it's odds on it'll be an imperial size and pitch.
Looks like a left hand thread to me.
Measure the diameter, and the pitch, and I'll have a look see if there are details in Machinist's Handbook tomorrow.
Shows you how to measure the pitch here.
https://en.wikipedia.org/wiki/Square_thread_form

If you could that would be amazing.
Pitch says 0.08 inches and diameter 0.625.

 

[SammyQ]

https://www.ukworkshop.co.uk/threads/wadkin-ags-spindle.128715/page-2

https://www.ukworkshop.co.uk/threads/wadkin-10-ags-restoration.130213/

This will get you started.

 

[Austin Branson]

I have an AGS 10. I had to have a new shaft made, and yes, it’s imperial. 5/8 inch. Yes, it’s a left hand thread. It was made for me by a member of this forum, but I am loathe to publish his name. I shall contact him for you. Best wishes.

 

[samweb132]

If you could give him a message that would be great. Was realy hoping I could source a nut for it instead having to machine a new spindle that seems to be a lot more difficult at the moment.

I have an AGS 10. I had to have a new shaft made, and yes, it’s imperial. 5/8 inch. Yes, it’s a left hand thread. It was made for me by a member of this forum, but I am loathe to publish his name. I shall contact him for you. Best wishes.

 

[ChaiLatte]

Was really hoping I could source a nut for it instead having to machine a new spindle...

Please could you provide some indication of how much you want to spend on this.

Please also discuss the age of the machine and how that might impact any reasonable expectation of spare parts availability.

Please discuss what you consider an acceptable hourly rate for a machine shop which has to reverse engineer what you show, and tool up to make a one-off non-standard thread.

 

[deema]

Unfortunately that members workshop is in storage at the moment! Life should be returning to normal in the near future with a lot of help from his friends getting the machines back out of storage. The safely getting them moved is something I’m not looking forward to! It felt like a Herculean feat just getting them out of the old workshop into storage.

 

[Amplidyne]

It's as Austin Branson said. 5/8" (0.625") and 12.5 tpi left hand thread using the dimensions given.

No standard for it apparently, at least not going by my ancient Machinery's Handbook (1916)

A Whitworth thread that size would be 11 tpi, which would be 0.09" approx.

Best bet for pitch is the guy who has actually made one. All I can help with (such as I can) are sizes.

 

[Fergie 307]

Abssac or Fastenright do square and acme threaded stuff, might be worth a call.
Or could you maybe replace the threaded section with something that is readily available. Depends what the whole shaft looks like and how keen you are to preserve it's originality.

 

[samweb132]

Abssac or Fastenright do square and acme threaded stuff, might be worth a call.
Or could you maybe replace the threaded section with something that is readily available. Depends what the whole shaft looks like and how keen you are to

From what I've heard machining a new spindle is alot easier relative to machining a new bolt. But I'm pretty illiterate in the machining department and am scared I'll mess things up. So really leaning towards sourcing a bolt at this point.