Thread Cutting

[L R P]

Hi All
I am interested in cutting threads on on small turned boxes. Todate I have only
been able to source info from o/seas, namely, Klein and Soren Berger.

Does anybody know of Aussie ones or has anybody got one they no longer need.

Thanks

PS I know about thread chasing chisels.

[Cliff Rogers]

You say
PS I know about thread chasing chisels. does that mean you don't want a thread chaser? :?
hughie (http://www.woodworkforums.com/members/7266-hughie/) is a member here & he makes thread chasers.

[hughie]

Not many are locally made and most are expensive, thats how I got into it. The one I make is a three in one tool. It can cut inside and outside threads and do some basic trimming around the edges. As it saves buying several tools I figured its far more cost effective.
For info look up, this one is about the best also try Sorby tools they have a decent article on thread chasing.

http://www.toolsforworkingwood.com/prodimg/ms/pdf/MS-THRDCH.pdf

Theres some pretty fancy machines out there for doing this sort of thing, as I see it, a whole lot of expensive technology to produce a couple of threads.

pm me if would like more info,if I am going to make some it will be cheaper to do several at once.

[L R P]

Thanks Cliff

It 's just that jigs look to have a better thread per inch, The smallest chaser I've seen is 16tpi, I think lidded boxes would benefit from 10 or 12 tpi, strength wise.

I will have a yarn with Hughie.
Cheers

[dai sensei]

Expensive, but Vermec (http://www.vermec.com/id1.html) in Aus, make this one (http://vermec.tripod.com/PDFs/threadcuttingattachment.pdf)

[joe greiner]

Click "Threading" on the second line here: Wood turning (http://homepage3.nifty.com/manasan/english/diy/turning/turn-1.htm)

A commercial cross-slide (i.e. X-Y) vise would be less troublesome than all the machining. On my bucket list is a similar contraption, using all-thread the same as my lathe spindle, using two hex nuts in the vise, with a truck valve spring between them to eliminate backlash.

For the cutter, I intend to use a 60-degree dovetail bit in a Jacobs chuck on the lathe spindle, with the whole affair rotated 30 degrees for alignment.

It's on the same list as my Rose Engine, unfortunately.

Cheers,
Joe

[Skew ChiDAMN!!]

It's on the same list as my Rose Engine, unfortunately.

I hear that. :sigh:

At least with thread chasers I'd have a chance of getting started on my threads before I retire...

[RETIRED]

What a fantastic site Joe. A very inventive person.

[L R P]

Thanks everyone,

Thinking I will go with chisels, more learning.

[Cliff Rogers]

What a fantastic site Joe. A very inventive person.
Yup. :2tsup:

[hughie]

What a fantastic site Joe. A very inventive person

a classic example of necessity being the mother of invention. :2tsup:

[wheelinround]

One of the recent Peninsular Wood Turners newsletters (http://pwguild.org.au/) had an article and design for a threading jig.

Oh here is one http://www.atbq.qc.ca/jm2/thread.htm

[joe greiner]

Around the same time I found the Japanese threading jig, I also found one built by Dick Veitch of North Shore Woodturning Guild in New Zealand. ( North Shore Wood turning Guild (http://www.wood.org.nz/) ). Unfortunately the link from 2006 is no longer valid. I did, however, copy the text (very voluminous) and the pictures.

Essentially, he used a method similar to the Japanese gent, with a commercial X-Y vise, but with the smaller all-thread welded to a stub to mate with his chuck. The two carrier nuts are welded to a bar which clamps in the vise. I figure 8 tpi (my current lathe configuration)would be OK for wood threads, so my "improvement," when and if it comes to pass, will use a single piece of all-thread, provided I can devise a proper shoulder to minimize runout. Also, the truck valve spring could eliminate backlash.

One problem with clamping the loose hex nuts in the vise (Yeah, it hurts to even think about it) is to consistently clamp them in the correct orientation, i.e. with either the flats or the corners resting on the vise bed, because the center is at a different height for each.

I've attached a couple pictures of Veitch's apparatus.

Cheers,
Joe

[Sturdee]

Around the same time I found the Japanese threading jig, I also found one built by Dick Veitch of North Shore Woodturning Guild in New Zealand. ( North Shore Wood turning Guild (http://www.wood.org.nz/) ). Unfortunately the link from 2006 is no longer valid. I did, however, copy the text (very voluminous) and the pictures.


Joe

Joe, the article (http://www.wood.org.nz/content/spinningathread_files/thread1.php) and photos (http://www.wood.org.nz/content/spinningathread_files/dick_thread_cutter.htm)are still on that website.

Peter.

[APD]

At the recent Adelaide Home show the members of the Copper Coast Woodworkers had a machine for cutting internal and external threads, a very smart bit of kit. Sorry I cant give you the name of the individual but he was very well versed in the mechanics of the treading issue.Copper Coast Woodworkers Home (http://www.woodgroupsa.org.au/coppercoast/) should get you started on a search for the right person.

Good luck

[wheelinround]

I like Dicks idea but would prefer being able to remove the chuck to another thread and nut set up for various size threads. It is possible

[joe greiner]

Thanks, Peter. The link I had earlier was cloned into the text copy, and the address has apparently been revised.

I like it too Ray. A set of chuck adapters might be simplest, but adding loose components tends to compromise runout. Separate welded setups would be more reliable.

Cheers,
Joe