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Brainard #13

Chester5731

Registered
In the photos on this sight I found a pic of the Brainard #13 mill. On the back side of the machine it shows the shaft and pulleys that mount over the machine. The one I am buying has been converted to electric and does not have those pulleys. Does anyone know where I might find them and any other attachments for the machine?
 

Attachments

dkamp

eMail NOT Working
Hi Chet!

That assembly you see in the back, is frequently referred to as a 'countershaft'. Power comes from the central lineshaft to countershafts above each tool, and clutches on the countershaft engage to run the tool. Frequently, the countershaft has several steps on the belt, and a forked rod that shifts the belt from position to position, commensurate with the symmetrically opposite step on the tool.

The countershaft runs on bearings, and held by countershaft supports, typically they're castings with an open-throated 'hook' with a retainer bolt or two that allow for self-alignment in-situ.

Sometimes, the countershaft will have two belts- one straight, the other twisted 180 degrees, and two clutches, one that will run forward, the other reverse.;)
 

Chester5731

Registered
Thanks for the reply. At least now I know what it is I am looking for. Unfortunately someone converted it to electric with a 3 phase motor attached to a transmission. That has to go.
 

dkamp

eMail NOT Working
That's commonly referred to as a 'Lima Drive', which is actually a brand of drive manufacturer who made electric motor drives coupled to automotive transmissions... but anyone who homebrewed their own, got labeled with same moniker.

The Lima Drive was not an unusual modification... When Henry Ford converted his manufacturing plants from lineshaft to electric drive, the use of this setup was extremely common. Machine tool manufacturers actually SOLD their machine tools with the electric drive as an option.

Reason why electric was chosen in the face of lineshaft presence, was totally industrial process engineering- by having machines on lineshafts, the positioning of equipment was rather static, hence, materials passing through a process would have to make zig-zag trips around a shop to get all processes done. Conversion to electric drive meant machines could be moved and positioned totally in accordance to process requirements for an assembly.

So... depeding on what your drive really looks like, and who may have made it, it might be much more worthy than you think...
 

dkamp

eMail NOT Working
No reason you can't use it on single-phase, Chet- just make up a rotary converter, or stick a Varible Frequency Drive on it... there's plenty out there that'll accept 240v single in, and push 230 three-phase out...
 
I went through the same agonies, since I only have single phase power at my home. I finally bit the bullet and spent $150 for a VFD, as my Lima drive was absolutely shot.

VFD.........hands down! I have a 1920 Hendey lathe, fitted with a Century 2hp, 3 phase motor powered through a VFD. I use a single belt on the motor and it runs to the largest pulley on the lathe. After the VFD installation I had:

True 3 phase power from single phase (VFD creates an artificial third leg).

Instant on/off which can be set with various delays or braking, as desired.

Variable speed and reverse via an inexpensive potentiometer and switch.

The VFD is basically a compact computer and is programmed by you once installed. Not sure about your computer skills? One call to the distributor put me in touch with a very patient tech who walked me through the whole, simple process. I also took written notes in case I ever had to set it up again.
 

Chester5731

Registered
George, might I ask where you bought your VFD? Unfortunately that countershaft on eBay is several states away and local pick up only.
 
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