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Posted by bigegg on March 26, 2008, 4:04 pm
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I recently bought a cheap (small) lathe)
it's only about 3x12, and possibly a zyto (althoough unbadged)
At the moment, it's got two drill chucks on it - a "foreign" make
hand-tightened chuck of about 1/4" capacity mounted on the tailstock,
and a jacobs no.34 mounted on the headstock.
no tapers in sight.
The tailstock chuck is threaded onto a (about) 5/8" BSF which is
integral to the tailstock slide (ie, the threaded part
can't be removed to insert a centre)
and the headstock arbor ends in a male thread to which the chuck is
screwed.
main question - I want to make a face plate to fit on the headstock -
does anyone have any idea what type of thread a no. 34 jacobs chuck
would have?
I'm assuming it's a 45/64 16 - it's too big for a 5/8" 16
where can I get a tap for this size thread?
I don't have any gears for the screw cutting, so I can't cut it from
scratch!
--
BigEgg
Hack to size. Hammer to fit. Weld to join. Grind to shape. Paint to cover.
http://www.workshop-projects.com -
Plans and free books - *Now with forum*
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Posted by Richard on March 27, 2008, 7:17 am
Please log in for more thread options wrote:
<snip>
>
>I'm assuming it's a 45/64 16 - it's too big for a 5/8" 16
>
>where can I get a tap for this size thread?
>
>I don't have any gears for the screw cutting, so I can't cut it from
>scratch!
According to the Jacobs site
(http://www.jacobschuck.com/pdf/Technical-Information.pdf), the thread
is either 5/8 or 3/4 x16 I assume Unified form although I didn't
notice it mentioned.
Richard
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Posted by rack2000 on March 27, 2008, 12:06 pm
Please log in for more thread options The 3 I have are UNF threads
Chris.
>I recently bought a cheap (small) lathe)
> it's only about 3x12, and possibly a zyto (althoough unbadged)
>
> At the moment, it's got two drill chucks on it - a "foreign" make
> hand-tightened chuck of about 1/4" capacity mounted on the tailstock,
> and a jacobs no.34 mounted on the headstock.
>
> no tapers in sight.
>
> The tailstock chuck is threaded onto a (about) 5/8" BSF which is integral
> to the tailstock slide (ie, the threaded part
> can't be removed to insert a centre)
>
> and the headstock arbor ends in a male thread to which the chuck is
> screwed.
>
>
> main question - I want to make a face plate to fit on the headstock -
> does anyone have any idea what type of thread a no. 34 jacobs chuck would
> have?
>
> I'm assuming it's a 45/64 16 - it's too big for a 5/8" 16
>
> where can I get a tap for this size thread?
>
> I don't have any gears for the screw cutting, so I can't cut it from
> scratch!
>
> --
> BigEgg
> Hack to size. Hammer to fit. Weld to join. Grind to shape. Paint to cover.
> http://www.workshop-projects.com -
> Plans and free books - *Now with forum*
|
|
Posted by bigegg on March 27, 2008, 3:07 pm
Please log in for more thread options rack2000 wrote:
> The 3 I have are UNF threads
>
> Chris.
ta very much.
I'll measure the diameter of the threads and go searching for a
suitable tap.
--
BigEgg
Hack to size. Hammer to fit. Weld to join. Grind to shape. Paint to cover.
http://www.workshop-projects.com -
Plans and free books - *Now with forum*
|
|
Posted by bigegg on April 10, 2008, 1:06 pm
Please log in for more thread options > The 3 I have are UNF threads
>
> Chris.
>
Turns out it is 7/8" whitworth - I decided to buy some nuts, and I'll
just weld on a plate
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>I'm assuming it's a 45/64 16 - it's too big for a 5/8" 16
>
>where can I get a tap for this size thread?
>
>I don't have any gears for the screw cutting, so I can't cut it from
>scratch!