Wadkin ags 10 Lock Nut

[Fitzroy]

Been out to the shed and taken a bunch of photos and measurements best I can of the nut from my AGS10 it’s an early model with the spindle housing integral to the swing arm.

From what I can tell the thread on the spindle is square, the nut definitely has a narrower root than crest.

Fitz

 

[samweb132]

Been out to the shed and taken a bunch of photos and measurements best I can of the nut from my AGS10 it’s an early model with the spindle housing integral to the swing arm.

From what I can tell the thread on the spindle is square, the nut definitely has a narrower root than crest.

Fitz
View attachment 191527

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Thank you for the pictures. This is exactly the same as my one. Not fully checked the measurements but looks right. I will ask to return it with few pictures of other square spindles for proof.

 

[deema]

I think @Bingy man has a pint that’s not been buttoned down. I agree with the assessment that the threaded section of the spindle looks bent. Please check it out before committing another nut. I’d place a metal ruler against the threads (after a good wire brush) and with a light behind the ruler look for any gaps indicating it’s bent. Check again at 90 degrees to the first test.

 

[Bingy man]

I think @Bingy man has a pint that’s not been buttoned down. I agree with the assessment that the threaded section of the spindle looks bent. Please check it out before committing another nut. I’d place a metal ruler against the threads (after a good wire brush) and with a light behind the ruler look for any gaps indicating it’s bent. Check again at 90 degrees to the first test.

Have to say it was @Distinterior that -1st noticed this , the op has checked it though and says it’s the camera angle if I recall.

 

[samweb132]

Have to say it was @Distinterior that -1st noticed this , the op has checked it though and says it’s the camera angle if I recall.

I think @Bingy man has a pint that’s not been buttoned down. I agree with the assessment that the threaded section of the spindle looks bent. Please check it out before committing another nut. I’d place a metal ruler against the threads (after a good wire brush) and with a light behind the ruler look for any gaps indicating it’s bent. Check again at 90 degrees to the first test.

Yeh I checked and it was straight to my plastic ruler. Never checked it with a proper rule though. John Mills (DoubleBoost on youtube) currently has it and seems pretty confident he can get a nut sorted.

 

[Bingy man]

Yeh I checked and it was straight to my plastic ruler. Never checked it with a proper rule though. John Mills (DoubleBoost on youtube) currently has it and seems pretty confident he can get a nut sorted.

Hope it all goes well for you

 

[Housey210]

perhaps the spindle assembly has been swapped out by another owner?

 

[Distinterior]

perhaps the spindle assembly has been swapped out by another owner?

That was my first thought when I read Sam's post #60......

 

[J-G]

Been out to the shed and taken a bunch of photos and measurements best I can of the nut from my AGS10 it’s an early model with the spindle housing integral to the swing arm.

From what I can tell the thread on the spindle is square, the nut definitely has a narrower root than crest.

Fitz

The drawing of the thread profile - if accurate - indicates a totally non-standard thread. My initial thought on seeing it was that it might be 'Stub' ACME but the included flank angle calulates to 36.8º whereas any ACME should be 29°. The drawing also indicates a 'pitch' of 2mm so If we assume that it is a Metric thread then a Trapizoidal form should have a 30º incl. angle.

One issue is that both ACME & Trapizoidal form threads are often 'Non-Standard' since they are often used for 'non-standard' applications. ie. the 'Standard' seldom persists - except as far as the thread angle is concerned.

 

[deema]

Its definitely a square thread on the early machines.

 

[Fitzroy]

The drawing of the thread profile - if accurate - indicates a totally non-standard thread. My initial thought on seeing it was that it might be 'Stub' ACME but the included flank angle calulates to 36.8º whereas any ACME should be 29°. The drawing also indicates a 'pitch' of 2mm so If we assume that it is a Metric thread then a Trapizoidal form should have a 30º incl. angle.

One issue is that both ACME & Trapizoidal form threads are often 'Non-Standard' since they are often used for 'non-standard' applications. ie. the 'Standard' seldom persists - except as far as the thread angle is concerned.

Its definitely a square thread on the early machines.

The thread profile I drew is in the nut. The shaft has a square thread that is clear from the picture. The nut, from the best I can tell, does not have a totally square form.

 

[deema]

I’m guessing, but I suspect that the form of the thread was created by hand grounding HSS, and the discrepancy in the nut is due to that. After all the inspectors I suspect would use a go-no go gauge and as long as it passed it was good to go! After all, they couldn’t see the thread form like you can in the spindle

 

[Housey210]

treat yourself to some screw pitch gauges, metric, imperial, acme etc. you said in one reply the started to go on.

 

[samweb132]

The thread profile I drew is in the nut. The shaft has a square thread that is clear from the picture. The nut, from the best I can tell, does not have a totally square form.

Awh jeez. You are realy starting to make me doubt that the nut didn't fit.
I couldn't get it on by hand that's all I tried but was giving my all into it. Didn't want to ruin any threads. But now I'm starting to think I didn't try enough.

 

[deema]

I believe they sent you a nut for the ‘upgraded’ AGS10 which had a single bar supporting the fence, that did if memory serves have a trapezoidal thread, which is a standard thread. It would not fit your machine, you could screw it in, but you’d need a new spindle and nut afterwards!

 

[Fitzroy]

Awh jeez. You are realy starting to make me doubt that the nut didn't fit.
I couldn't get it on by hand that's all I tried but was giving my all into it. Didn't want to ruin any threads. But now I'm starting to think I didn't try enough.

As Deema said it wouldn’t fit. I was only adding info as I’ve seen a number of threads on this topic over the years and the info may help someone at some point.

 

[Housey210]

treat yourself to a good set of screw pitch gauges.

 

[toolsntat]

@Turn It In

 

[Housey210]

How did you get on with this problem?

https://www.ebay.co.uk/itm/38788759...sM5ZesqFDxfRnbXMEsM9d74g==|tkp:Bk9SR4jkpuyhZQ

 

[samweb132]

How did you get on with this problem?

https://www.ebay.co.uk/itm/387887590561?_skw=wadkin+breaking&itmmeta=01JM7C9P7T9G456AQAZ3SWSJ4C&hash=item5a4fe6eca1:g:K4gAAOSwLHZnjl95&itmprp=enc:AQAKAAAA8FkggFvd1GGDu0w3yXCmi1dWCacA62GrfFoiRgYF9dS7MOsO8SxUiVr5wisZ+1w2d8UZXAYlDUOVzSrUvoOqMyAmuvt5hLZoO6u/XtlVCAUter6W1S8HuwOkIovUvDlBR3Yne7x3dxa80xkRzjaISTKVo/Blbpa5yAJRTfIj8R6X8xtPc3ek+YEW/io8jxnGZAmlS1no4kFHzenVhfqf9+4UXiKIq+x5eoTNF7QREZQOMF1BuOGwKOhuaKIcluF6CZZgrjlBZj27HlPHnCo2clhUw5670RDOFA54JId2UosM5ZesqFDxfRnbXMEsM9d74g==|tkp:Bk9SR4jkpuyhZQ

Saw that the other day. Have it saved incase i ever want to have it done. Managed to buy a nut and have a washer machined. Have had some problems with the electrics but all got sorted last week. Need to check whether the spindle is lined up okay but not gotten around to it. If its a bit wonky will contemplate sending it to this guy. Thanks