Bradley 40Lb Power Hammer Questions

Michael J. Spangler

Michael J. Spangler

Joined
Oct 8, 2003
Messages
2,181
alright guys... time to get this thing running. its been sitting too long.

what size motor should i use to run this thing?

how many rpms? is 3450 too fast?

will a canvas belt be ok to run this? should i try to find a way to run it off a rubber belt?

i think thats all for now. Hey Mark Williams, did you ever get the information booklets on the bradley hammers, from cortland machine tool?

thanks in advance guys

Mike
 
Mike, I've never run a Bradley, but you've got to think that if it was originally run from line shafting, 3450RPM will likely be too fast without some serious pulley reduction. My Kerrihard is currently running on a 3450RPM motor, but it has a 1.75" pulley on the motor and about a 12" pulley on the hammer and that's even a bit too fast. Probably something 800-1000RPM would be ideal, but 1750 could work just fine with a little pulley tuning.

My gut says 2-3HP would probably work, and use whatever belt you can make work. The best thing you can do it make it run SOMEHOW and once you play with it adjust as you need to and tune it a bit.

-d

P.S. Great meeting you at the Hammer-in. You're doing some awesome work.
 
I didnt get any info yet Mike.

Do need to get some info together though, As I would like to get the 150 running.

I plan on using an old cub 4-banger that lived it's life running a sawmill. It even uses the same size canvas belt. I'm assuming the canvas would be best to allow for the slippage needed to control the speed. Rubber would be all or nothing.

The electric motor that was running mine in it's previous life was a 7.5 horse 3 phase 440 volt 900 rpm.
 
sounds good deker. if i can find some type of pulley t put on the motor that i can run straight to the old drive wheel that sucker is like 16" diameter.
so would the small pulley on the motor and the 16" drive wheel help slow down?? or am i thinking backwards? It was good to meet you too... just wish i sat down and spent more time talking with individuals. sure was a good time huh?

mark. i wish i lived closer i'd drop by and help you get it running.
luckily i live in an area where there are a lot of sail makers, and canvas is no problem for me. now what type of pulley would i need to run a canvas belt on the motor? would that work?
well mark when i send away for the general info and the specific model info...i'll copy the general company info book for you... save you a few bucks

thanks again guys. keep em coming
 
Mike, I'm curently tuning a Fairbanks 50# run off a 2hp 1750rpm motor. On the motor side is a 2 1/2" pully going to pillow blocks and a 5" flat pulley. The flat belt runs from that pulley to the 12" pulley on the hammer.
The printed tag and info I have says the recomended speed is 375 beats per minute. This pulley setup gives me close to the bpm I need.
Previously I had a 5" on th emotor and I was winding out with about 750 bpm. She was screaming!! hehehe It let me know what need snugging down, thats for sure
 
M,
I'd say it'll take at least a larger V-8 ... maybe a big diesel and maybe 300 gallons of fuel to get that thing out here to MY shop where it belongs!:eek::D :thumbup:

I already have a decent 50 pound, but there's no beating those beam hammers for cool.:)
 
birddog. could you post some pics? or email me some please... its too early in the morning to visualize

Joe: you're welcome to come and visit it any time you want. whenever you get to this area make sure you drop in.
 
I can email ya some. haven't figgered out how to do all the picvture thing on this new fangled computer.

The reason I went with pillow blocks was, the position of the flywheelon the hammer dictated a flat belt.
 
Michael J. Spangler said:
sounds good deker. if i can find some type of pulley t put on the motor that i can run straight to the old drive wheel that sucker is like 16" diameter.
so would the small pulley on the motor and the 16" drive wheel help slow down?? or am i thinking backwards? It was good to meet you too... just wish i sat down and spent more time talking with individuals. sure was a good time huh?
Click to expand...

I understand completely. Too many people I wanted to talk to and not enough time...You are correct in thinking that the smaller pulley on the motor side will reduce speed at the large pulley side.

now what type of pulley would i need to run a canvas belt on the motor? would that work?
Click to expand...

The most simple way to do that is to make/have made a simple wide pulley to mount to the motor output shaft (though, depending on the width of the belt you may want to use the pillow block idea so you're not side loading the bearings on the motor as much). It should just be a simple aluminum cylinder as wide as, or slightly wider than your belt with a slight (2-degree or so) crown from the center down to each end. Have a keyway cut to match your motor/drive shaft and a couple of set screws drilled to hold the keystock and you're set.

Hope all of that made sense...

-d
 
awesome. thanks for the pics

deker... great idea... i think i should get moving on this soon.. i've been luck enough to find much more info than last time i searched around.

thanks again guys i'll post more and some pics soon too
 
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