View Full Version : Old Iron is Back

02-03-2009, 10:05 PM
Well, at long last, another old piect of American iron is back out of retirement. This is a 1922 Barber Coleman #3 gear hobber. When I picked it up it was a sight for sore eyes, except mine. I have been looking for ine of these for over 3 years now. I received it last october, and have been cleaning and restoring ever since. It was originally a line shaft machine, and had all G]the line shaft equipment still on board. It was modified somewhere along, I suspect by the factory, to have an electric motor. THe motor was on top, above the machine kind of in a precarious position. O further modified it to put the motor below. THe line shaft pedals and pullies are still in retirement.
I couldn't post pictures before, because when working on this machine, I was far too dirty to get near a camera.

There are still a few monor mechanical things to clean up, and then comes tooling up. I will need work arbors, and have a lot of change gears to make.

My shop didn't have 3 phase before getting this machine, but now it does. I built a converter from an old 3 phase motor, and am quite impressed how well it works.

Enjoy the pics.





This new high tech board only allows 4 pics, 2 are missing from here....


02-03-2009, 10:10 PM
Ok, Here are the other 2 pics. This is SOOOOooooooo convenient!




doctor demo
02-03-2009, 10:17 PM
Nice looking !!!

How long do You think it is going to stay that clean :D .

Realy, that looks like it is allmost new.


02-03-2009, 10:45 PM
Nice,next step is to slip up on a dump truck load of hobbs.:)

02-04-2009, 04:27 AM
As said, fantastic work you've done there.:)
Me not being familiar with this type of machine, I'm really looking forward to more pic's of it set up for work.

02-04-2009, 06:32 AM
back and white in a grey world i love it its cool ,, now try not to get it dirty lol looks great.......

Spin Doctor
02-04-2009, 06:38 AM
Neoman, what's the base ratio of the machine and what pitch are the feed and index gears? What size hob arbor. Also I suspect you will be getting a few PMs asking if you cut some gears and splines for people :D

02-04-2009, 07:59 AM
Very nice job, looks great. It is plain to see that your project was a labor of love.

02-04-2009, 08:19 AM
Nice Job. I would of painted it a dirtier colour so you wouldnt see the coolant stains and dirt so easyLOL I think you did a great job. I wish i could give you my elliot shaper to paint up but it would have to be Scottish Green.

oil mac
02-04-2009, 10:48 AM
Really nice to see how you reurrected that fine old machine, It looks like new Real Eye Candy

02-04-2009, 10:45 PM
Thanks for all the kind words guys! I hope to get enough tooling built, and find a few more hobs so It can be used as a integrated machine in the shop. It still needs a lot of TLC.

I used Kelly Moore Kelguard paint. It is what I use on my model engines, and it seems to be quite resistant to gas and oil. But, I'll keep it wiped down just in case. THe color is actually a light grey, and a dark blue. My camera seems to
change the colors a bit with the flash.


Spin Doctor
02-05-2009, 06:57 AM
It's not just hobs. It's arbors. And then it's more arbors on top of the arbors you already have. One piece of advice. If you start cutting helicals make up arbors that have shoulder and splines/keyway so the gear blank can't scoot down the shaft or turn on it.

02-06-2009, 02:05 PM
Spin, it sounds like you are familiar with gear hobbing machines.

The index constant is 12, and the feed constant is .075.
My change gears are 20dp, 5/8 face, 11/16 bore with a 5/32 key.

I am on track to firing it up this weekend, probably late Sunday, to make my first gear.

BTW, There were some 16dp change gears with the machine which I will not be using. They range from 30t to 52t. If anyone is interested in trading some of these for some of the ones described above, send me a PM for more details.

It was suggested to me by a friend I try 1144 steel for making gears. I picked some up yesterday, and made a few blanks. WOW!, I really like the way this stuff machines. First time I used it. nice chips, nice finish.


Spin Doctor
02-06-2009, 05:39 PM
Index constant of 12, well then if it works the same way the B&C 16-16 we had art work then if you have a 30tooth gear on the input shaft and a 60 on the output it should cut 24teeth. 45 would get you 18 teeth. Index ratios for srup gears are really pretty easy. Its helicals that will drive you nuts trying to get the index ratio. to 1.0000 or .9999 Of course JS cheats, he does all electronically. Make sure the extra change gears aren't for the feed set-up. The B&C we had used 10DP for the index gears and 12DP for the feeds

02-06-2009, 06:12 PM
Spin, the extra gears have 3 different configurations, I doubt very seriously they were for this machine. Also, a friend who has a #3 told me it's best to have all the change gears the same dp do they can be used in either place.

I agree, the ratios for helicals is a bit more challenging, but there are tables, and the math isn't that tough. It's a whole lot harder to figure out where all these extra parts I have belong. Ha Ha!