Thread: Kearney & Trecker Co. - Milwaukee H Milling Machine

Looks like a rack cutting attachment there as well maybe??

Nice heavy machine, I looked a few before scoring the Vernier. If i were closer and had the room......

Ew

Originally Posted by Ueee

Looks like a rack cutting attachment there as well maybe??

Sorry I couldn't tell you, I wouldn't know if I saw one. I believe it weighs 1880kg before accessories. I wish I knew more about mills and was confident I could get her back in condition and in use.

5hp motor.

She's only light then, and gutless! Would be a breeze to move.....
The motor may be Star star delta run though so a VFD may not be an easy option, the Verniers is.

Someone in the states swapped a single phase motor in one. If that means anything.

Originally Posted by DSEL74

Sorry I couldn't tell you, I wouldn't know if I saw one. I believe it weighs 1880kg before accessories. I wish I knew more about mills and was confident I could get her back in condition and in use.

5hp motor.

At that price, with that amount of tooling, I strongly suggest that you get it. That is a serious milling machine, looks to be 40 taper (might be 50) and has a pretty decent vertical head. There's a vise, collet chuck, arbors etc that all look in serviceable condition. Well worth $1000 IMO.

Of course moving it & powering it are issues, but they're solvable. Hiab crane trucks easily handle 2000kg and aren't that expensive.

PDW

If you want a mill you should buy it. It has a very good selection of acessories from the look of the photos and the price is good. If it was closer to me i would be looking at it.

Something to consider is your power bill. 5 hp is about 3.5 kW and your power meter will spin around fast with 3.5kW going thru it .

It should not be a problem if you don't use that mill a lot , a bit like having 2 kettles on for cups of tea

My Hendey lathe came with a 3 hp motor , I'm making my own lectricity to power the Hendey .

We pay in Australia, about the highest in the world for electricity , despite being blessed with abundant natural resources .

Originally Posted by morrisman

Something to consider is your power bill. 5 hp is about 3.5 kW and your power meter will spin around fast with 3.5kW going thru it .
.

Only if you use all the HP. I've never worried about it, it's one of the costs of this hobby.

My Monarch has a 7.5HP motor on it. A lot of the time I doubt I'm pulling more than 1.5HP or so.

OTOH 10 sets of twin 55W fluoro lights chew up a lot of power all day long. LED replacements are under active consideration.....

PDW

I would make sure it is not clapped out first..

Originally Posted by PDW

Only if you use all the HP. I've never worried about it, it's one of the costs of this hobby.

My Monarch has a 7.5HP motor on it. A lot of the time I doubt I'm pulling more than 1.5HP or so.

OTOH 10 sets of twin 55W fluoro lights chew up a lot of power all day long. LED replacements are under active consideration.....

PDW

Ive noticed that modern electric motors are smaller, for a given hp, compared to the older motors that older machines have fitted . The old motors for example , 2 hp are about twice the physical size of a new present day 2 hp motor . With that large mill, it may be worthwhile swapping the motor over to a more efficient and lighter modern motor , less mass to spin around means less power required I guess .

Originally Posted by morrisman

Ive noticed that modern electric motors are smaller, for a given hp, compared to the older motors that older machines have fitted . The old motors for example , 2 hp are about twice the physical size of a new present day 2 hp motor . With that large mill, it may be worthwhile swapping the motor over to a more efficient and lighter modern motor , less mass to spin around means less power required I guess .

Hi Mike,

With 3 phase motors the current drawn is proportional to the load, when a 5 hp motor is just running with no load it draws very little current.. even fully loaded, the 5 hp motor would draw 3.8 kw, and if you ran that for an hour fully loaded that's 3.8 kwh or about 80 cents.... hardly enough to break the bank. In hobby usage that would be a weeks work for less than a dollar.

Physical size of the motor isn't always a good guide to hp or efficiency.

Ray

Originally Posted by morrisman

...The old motors are about twice the physical size of a new present day 2 hp motor...

Someone who is more knowledgeable about motors may wish to correct me but motors work due to the force between the stator and the rotor. A old motor with a larger diameter rotor should probably generate more torque (T=F.r) I would have thought? If this is so then replacing an old motor with a new one is not necessarily the best thing to do with a machine tool.

Anyone ever thought about that or have any information?

Michael

I have heard people say older motors of the same HP were "STRONGER" so there may be some thing in that.