Myford toolpost stud

This topic has 10 replies, 5 voices, and was last updated 1 May 2018 at 13:42 by Michael Gilligan.

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30 April 2018 at 14:36 #352201
John Haine
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@johnhaine32865
In case anyone else is looking at making a new stud for their Myford-style Dickson QC toolholder. I was hoping to re-use the nicely made tall nut from the original Myford item on my new toolpost. This is advertised as being "threaded 7/16 UNF" on the Myford website.

It isn't. It's 7/16 BSF!
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30 April 2018 at 14:36 #13209
John Haine
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@johnhaine32865
1 May 2018 at 06:57 #352293
David George 1
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@davidgeorge1
Hi John Its good to pass on information like that although I don't need one at the moment it is useful to share and save making wrong parts.

David
1 May 2018 at 09:18 #352304
DMB
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@dmb
Hi John,

I think that all of the original Myford lathe + accessories used BSF or BA or at least that is so with all of my Myford OEM equipment.

John
1 May 2018 at 09:22 #352305
John Haine
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@johnhaine32865
Indeed, I think that's true – I'm just amazed that Myford Limited don't know that the studs they seem to have in stock are not the size they advertise.
1 May 2018 at 09:29 #352306
Hopper
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@hopper
Maybe nobody told them about their typo yet?
1 May 2018 at 09:53 #352314
Michael Gilligan
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@michaelgilligan61133
John,

Please forgive me if I have mis-understood your opening post, but:

I think what you have discovered is a case of 'product improvement' by the manufacturer.

Your original nut was made by [for] Myford at Beeston, and the new ones are made by [for] Myford at Mytholmroyd.

All references on the current site seem consistent … including the size of the special 'socket wrench' : **LINK**

https://www.myford.co.uk/cgi-bin/sh000002.pl?WD=nut%207%2016%20toolpost&PN=QUICK%2dCHANGE%2dHEXAGON%2dSOCKET%2dWRENCH%2d%2d78175F%2d3662%2ehtml#SID=153

This may be frustrating for those of us that own 'Beeston' products, but I feel sure that it is the company's prerogative to develop its product.

Many thanks for drawing attention to this, however.

MichaelG.
1 May 2018 at 11:22 #352327
John Haine
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@johnhaine32865
Michael, I now have two Myford studs, they are identical, one came with the lathe the other I bought recently but it proved to be too short for comfort for my new tool post. So I bought a 7/16 UNF bolt to make a new stud and found that the nut did not fit. At my local excellent fixings supplier, a quick measurement showed that the Myford stud was 18 tpi, and it clearly has a deeper thread form than unf. Hence most likely to be BSF. The nut supplied measures 17.95 mm a/f, 11/16" a/f is 17.5 mm (which is what they say the wrench is), while the spanner supplied with the lathe is "3/8 whitworth " and is just over 18mm a/f, actually the recommended size for 7/16 BSF.

UNF nuts seem to be 5/8" a/f, and the thinned down head of a 7/16 UNF hex bolt fits snugly across a 16mm wide pocket milled in the base of my toolpost block.
1 May 2018 at 12:21 #352339
Michael Gilligan
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@michaelgilligan61133
John,

I must be exceptionally dim-witted today … I still can't tell which [if any] of your items were purchased from 'Myford Mytholmroyd' ostensibly as 7/16" UNF.

Whatever … this is clearly a matter where caveat emptor applies in spades !!

MichaelG.
1 May 2018 at 12:38 #352343
John Haine
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@johnhaine32865
The second one.
1 May 2018 at 13:42 #352357
Michael Gilligan
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@michaelgilligan61133
Posted by John Haine on 01/05/2018 12:38:52:

The second one.

.

Thanks for clarifying that, John

MichaelG.
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