Monday, November 4, 2019

Turret Lathe!

Hey, remember how I was going to automate that Enco aftermarket turret, which would then be fitted to a South Bend 16" lathe?

Well, scratch that.  We just got an actual turret lathe instead.  Look at this beautiful beast:

It's a Warner & Swasey No. 4 Turret Lathe.  It's 8 feet long, 5 feet tall, and weighs about 4000lbs.  The above image is the lathe while it was a the shop that we acquired it from, Nasin Machine Co. in Moosup CT. 

The Warner & Swasey Company of Cleveland Ohio has a very interesting history.  Worchester Reed Warner and Ambrose Swasey, the founders, were icons of the New-England machine-tool building industry during the industrial revolution.  Starting at Exeter Machine Works in Exeter, NH, the two then went to work at Pratt & Whitney (in the company's early days, it was a machine-tool builder) where they managed and developed novel and improved methods of accurate gear manufacturing.  For that reason and others, their story is close to my heart, and I am proud to acquire a piece of their legacy.

The below images are of the lathe once we got it home and cleaned it up a bit.  I have images of how we moved this beast and got it to our second-floor shop space which I will post later.

It's 15" swing over the bed, 8" swing over the carriage, but the reason I picked up this model is the 2.5" through-spindle capacity.  You can stick a 2.5" round steel bar in one end, and just crank out parts all day long.  Gear blanks here we come!

This beast is powered by a dual-speed 7.5hp Louis Allis 3-phase induction motor.  The first time we wired up the motor and turned it on, the friggen thing sounded like a jet engine spooling up.  It was terrifying and amazing; my two favorite qualities in machine tools.

There is one little kink about the electrical demands of this motor though.  Originally a 220-volt single-voltage motor, at some point it was rewound for 550-volt, single-voltage. That's an odd number; 3-phase service around here is basically always 208, 220, 240, or 480-volt, and so we are having to rig something special to supply this 550-volt motor.  I briefly considered using this motor as "my first motor re-winding project", but after stacking up the costs for magnet wire, fish paper and resins (mostly the cost of magnet wire), I decided that we should instead take advantage of a derelict 30kva delta-star-conversion isolation transformer that we already had kicking around the shop.  7.5hp ends up being something like 9kva, so the transformer is more than happy to supply that.  Having a 30kva transformer (which is ~400lbs and is the size of a mini-fridge) supply this lathe is definitely a bulky arrangement, but it will do for now.

More on the current state of this lathe, and it's electrical work, coming soon!

For now, here's a picture of Andrew Birkel with the Warner & Swasey No. 4.  Andrew did all of the cleaning on this machine, and has been an immensely helpful right-hand man for my machinery salvaging activities, for a very long time.

1 comment:

  1. Hotel Casino and Hotel Las Vegas Map & Floor Plans - Mapyro
    Hotel Casino and Hotel Las Vegas Floor 문경 출장안마 Plans in Las Vegas, NV. Find 서울특별 출장안마 your way 밀양 출장샵 around 동두천 출장안마 the casino, find where everything is located 전라남도 출장안마 with these helpful


Turret Lathe!

Hey, remember how I was going to automate that Enco aftermarket turret, which would then be fitted to a South Bend 16" lathe? Well, s...