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Boot
03-12-2010, 07:40 PM
Has anyone the plans for a thread dial for a 9"C South Bend lathe. They want $150 for one on ebay. I think that's excessive. The little gear on the bottom of it is a 1.340" 32 teeth. I might be able to find a gear from Bearings Drives Unlimited the rest seems only a small shaft and bearing to hold it with a dial on the other end. Thanks Boot

Davo J
03-12-2010, 08:30 PM
These one's are $100
http://www.tools4cheap.net/proddetail.php?prod=threaddial
Dave

quadrod
03-12-2010, 08:39 PM
Read here, http://www.practicalmachinist.com/vb/south-bend-lathes/thread-dial-kits-any-interest-128605/

Carld
03-12-2010, 08:45 PM
It should be easy to fabricate one. All you need is a gear, a shaft for the gear, a brass bushing for the shaft, A piece of 1 1/2" dia. CR or HR, a short piece of 3/4" CR or HR to weld to the 1 1/2" at right angles to bolt it to the carriage apron. You will have to machine a dial to press on the shaft or you can get fancy and press a hub on the shaft with an adjustable plate with the marks on it.

A little measuring and drawing it up and before long you will have your thread dial for probably less than $40.

dp
03-12-2010, 09:00 PM
There's some beautiful examples of shop made thread dials in the pages here. Google thread dials site:bbs.homeshopmachinist.net and see what you get.

Boot
03-13-2010, 10:50 AM
There's some beautiful examples of shop made thread dials in the pages here. Google thread dials site:bbs.homeshopmachinist.net and see what you get.
Couldn't find any on the Google page. I did find good clear plans on a Nov. 1940 Popular Science page on how to build one. I still would like to know where I can get the little 32 tooth gear for it. GaryPhanson was making them, but that was 6 years ago. Any suggestions ?

quadrod
03-13-2010, 10:52 AM
send a PM to gary p.

Carld
03-13-2010, 11:09 AM
Have you tried Boston Gear and some of the other gear suppliers?

JCHannum
03-13-2010, 11:23 AM
It is a gear, but not really a gear. A toothed wheel is a more apt description of what is required, not a great deal of precision is required, just uniformity. Making one is a simple exercise that will gain you a new skill. Search the site for thread dial, not Google, there have been quite a few posts on shop made units.

dp
03-13-2010, 02:25 PM
Couldn't find any on the Google page. I did find good clear plans on a Nov. 1940 Popular Science page on how to build one. I still would like to know where I can get the little 32 tooth gear for it. GaryPhanson was making them, but that was 6 years ago. Any suggestions ?

http://bbs.homeshopmachinist.net/showthread.php?t=20563

There's not a lot of science in making them - it's a wheel, shaft, and dial and something to attach it all to. Here's one I adapted from an Ebay purchase:
http://TheVirtualBarAndGrill.com/machinery - scroll down a few pictures.

Butch Moses
03-13-2010, 04:29 PM
Sounds like Gary is planning to make some more. I bought one of his kits and can tell you that his work is top notch. It's well worth the cost.

Mike Burdick
03-13-2010, 05:43 PM
Boot,

Here's a thread dial I designed for a different brand of lathe but the dimensions can be modified so it will fit on a SB. You can even make the "pre-manufactured" gear. If you want, I'll even show you how to make the markings very easily - no special tools reqired either! It'll be a fun project for you. I'll also show you how to make the oil fitting at the top.

http://img.photobucket.com/albums/v157/MikeBurdick/combined_dial_pic-1.jpg

PLans...

http://img.photobucket.com/albums/v157/MikeBurdick/THREADDIALASSEMBLY.jpg

Mike

xeddog
03-13-2010, 11:31 PM
You might also hop on over to the PracticalMachinist forum and get in touch with either sblatheman or penelopepitstop. They both deal in used SB parts. I have dealt with both of them for my SB 9A and highly recommend them. If you do not want to frequent a competing forum, sblatheman can be reached by sending email to latheman2 @ aol dot com (fix the address appropriately), and penelopepitsop has a store on ebay as ipenelopepitstop (the leading "i" is on purpose).

xeddog

Boot
03-14-2010, 11:19 AM
http://bbs.homeshopmachinist.net/showthread.php?t=20563

There's not a lot of science in making them - it's a wheel, shaft, and dial and something to attach it all to. Here's one I adapted from an Ebay purchase:
http://TheVirtualBarAndGrill.com/machinery - scroll down a few pictures.
Thanks again: I really like the explaination of cutting a gear the Jim Sapp has been kind enough to put out. If I have to cut one I'll do it his way and use the Pop Science plans to make it. I never heard of hobbing a gear with a tap. You learn something new everyday in this hobby. The shop I worked at never made their own gears. And we made some huge ones. All done I believe by a place in Phila.PA area. Boot

Boot
03-14-2010, 07:49 PM
http://bbs.homeshopmachinist.net/showthread.php?t=20563

There's not a lot of science in making them - it's a wheel, shaft, and dial and something to attach it all to. Here's one I adapted from an Ebay purchase:
http://TheVirtualBarAndGrill.com/machinery - scroll down a few pictures.
I have found the place to get instructions on making a gear. I'll use the design from Pop Sci Nov. 1940 and also Jim Sapp explaination on how he cuts his gears for his telescopes. I will have to buy a 1" 8 NC tap to use as a hob. And I'll probably score the 32 teeth on the gear before hobing with the tap. I hope it works as I never did anything like this. I will try to buy gear first from BDU. Thank all of you for your info. Boot

Mcruff
03-14-2010, 08:18 PM
You'll need a 3/4" -8 tap, the tap needs to match the lead screw your making it for!!