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Left hand whit studding

Looking for 1/4whit steel studding

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ANDREW JACKSON 614/04/2022 21:25:30
6 forum posts

Can anyone tell me where I can get some 1/4 whit left hand thread studding. I have exhausted my limited list of possibilities.

Thanks

John Haine14/04/2022 22:32:10
4671 forum posts
273 photos

Does it have to be 1/4" and whit? M6 can be had here:

https://www.cromwell.co.uk/shop/fasteners/threaded-rods/m6x1m-threaded-rod-lh-bzpgr-8-8/p/QFT6390870B

old mart14/04/2022 22:48:11
3771 forum posts
233 photos

I suppose it could be done with a split die in a lathe or vise as long as the die could be held square. I had one of my apprentices at work many years ago put a thread on some 3/8" rod with a hand diestock. He showed me the 9" of thread and I nearly died laughing, he had made the most drunken thread I had ever seen. From one side it looked like parallel rings and the other looked like a twin start.

Edited By old mart on 14/04/2022 22:49:35

Bill Phinn15/04/2022 00:33:52
753 forum posts
113 photos

I'm not sure how long the studding needs to be, but pictured is a six-inch long two-way* 1/4" BSW screw I cut on precision ground 1/4" stock using a woodturning lathe and a tailstock die holder. It is a replacement for an original screw that had been bent through careless usage and rendered the whole tool unuseable. The job was easy to do and the tool now works very well indeed.

*i.e. right-hand thread one side and left-hand thread the other.

img_0872.jpg

 

Edited By Bill Phinn on 15/04/2022 00:38:25

David George 115/04/2022 07:54:05
avatar
1835 forum posts
503 photos

Tracy Tools do a die for 1/4 whit LH

https://www.tracytools.com/taps-and-dies/left-hand-thread-taps-dies-bsw?product_id=1294

David

Brian G15/04/2022 08:19:56
840 forum posts
37 photos

This firm stocks 6" lengths but says larger quantities may be available, perhaps worth contacting them?

stainlessautomotivefastenings

Oddly enough I found them when looking for 1/4 20 UNC which I thought might be an alternative.

Brian G

Nicholas Farr15/04/2022 08:30:54
avatar
3360 forum posts
1542 photos

Hi, I made a left and right hand M8 brass threaded rod with split hand dies. I held the rod in my collet chuck on my mini lathe and started the die while putting a little pressure on the die itself to keep it square to the rod, with a blank end arbor in the tail stock and turning the chuck by hand, then once the full width of the die was on, the rod was supported with a revolving centre, the left hand thread is a little longer than the right hand one and is about 110mm long.

left hand thread.jpg

old & new adjusting screws.jpg

This is for my Swiss Boy 116 lab jack. Swiss Boy 116

Regards Nick.

Edited By Nicholas Farr on 15/04/2022 08:54:31

ANDREW JACKSON 615/04/2022 08:55:35
6 forum posts

Thanks for all the replies, I wanted this to make a couple of feedscrews on a small manipulator and the 20tpi would give thou increments with a 50 division handwheel. Just being lazy really and shall order a die from Tracy Tools.

All the best

Andrew Jackson

Michael Cox 115/04/2022 09:15:10
550 forum posts
27 photos

Try:

https://www.gwr-fasteners.co.uk/

They to an amazing range of studs and fasteners. I have purchased LH studding from them in the past.

Mike

Nigel McBurney 115/04/2022 09:56:22
avatar
1000 forum posts
3 photos

To cut a long thread using a die on a lathe,hold a tailstock type die holder in the three jaw chuck with the appropriate die ,then hold the material to be threaded in an ER collet with a MT holder to suit the tailstock taper to obtain a firm grip on the rod, then with plenty of lubricant set the lathe to a low speed and cut the thread true,oil the lathe bed so that the saddle will slide easily.

not done it yet15/04/2022 10:51:42
6809 forum posts
20 photos
Posted by Michael Cox 1 on 15/04/2022 09:15:10:

Try:

https://www.gwr-fasteners.co.uk/

They to an amazing range of studs and fasteners. I have purchased LH studding from them in the past.

Mike

I often use GWR for fixings I have needed (particularly imperial ones). Always had very good service.

But it might appear that (at times?) they source their items from other UK based manufacturers/suppliers as one order I received included an invitation to purchase from another source.

I would expect Peterborough bolts and nuts could source the threaded rod for me - at a cost, of course.🙂

old mart15/04/2022 15:13:05
3771 forum posts
233 photos
Posted by ANDREW JACKSON 6 on 15/04/2022 08:55:35:

Thanks for all the replies, I wanted this to make a couple of feedscrews on a small manipulator and the 20tpi would give thou increments with a 50 division handwheel. Just being lazy really and shall order a die from Tracy Tools.

All the best

Andrew Jackson

I also chose 20tpi, but in 1/2" UNF for the adjuster screws for the right and left hand side saddle travel stops on the museum's Smart & Brown model A lathe. The aluminium wheels on them were engraved with 50 divisions for 0.001" resolution.

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