Thread: HELP!!!!!! with pulleys.

Your speed at the headstock is 144-72 (1010 RPM). 108-108 (505RPM), 72-144 (252RPM).

The actual shaft speed of the jack shaft is 505RPM

These figures have been rounded down to the nearest whole number.

Thanks very much for the information, much appreciated.

Would you say those three speeds are abit slow for a wood lathe or would I be better off having two or three different size V pulleys for the middle shaft??

The reason I'm asking is I picked up an old wood lathe about 2 months ago and have been slowly reconditioning it.

Originally Posted by fozz

Thanks very much for the information, much appreciated.

Would you say those three speeds are abit slow for a wood lathe or would I be better off having two or three different size V pulleys for the middle shaft??

The reason I'm asking is I picked up an old wood lathe about 2 months ago and have been slowly reconditioning it.

I would say too slow but it depends a little on the bearings.

If it is flat belt drive it may only have thin bronze bushes.

A pic of the headstock would be handy.

I will work out the speeds shortly for you.

Would be excellent for chasing threads...
Jim

What
you're restoring an old lathe and not showing us any wip photos

OK OK OK, i knew as soon as I started this thread I'd be asked for pictures. Too late tonight but i'll post some tomorrow.

I picked this lathe up about 2 months ago from a place in Rosebud. Apparently the lathe belonged to the previous owner of the house and he made toys with it.

The head stock, tail stock and banjo are all very substantial castings. The head stock shaft sits in 2 brass bushes about 6mm thick and about 50mm long. The tail stock shaft has 1 brass bush of similar size and all 3 bushes have a grease nipple and grease cap tapped into the casting above them. Screw to cap down and more grease is pumped into the bush/bearing.

I honestly dont know how the guy turned anything on the lathe the way it was set up when I first got it. The frame of the lathe had been put together from old fence rails and posts, and what looked like an old packing crate.

The first thing I did was discard the frame and make a new one out of ply and aluminium. Then I pulled all the moving parts apart, had to let them soak in the parts washer for a week before the built up grim softened enough then polished what was needed, removed the rust, repainted the castings and then reassembled everything.

The original head shaft was solid and had a thread nearly 50mm in diameter with about 5 threads an inch that 2 faceplates attached to. I've modernised the drive shaft by having it bored, a morse 2 taper added and the thread changed to accept my chuck.

The first picture shows the middle shaft, the second the V pulleys I have to use. If I use the pulley on the right that fits straight onto the shaft and gives me the first set of speeds that kindly worked out for me. The second pulley on the left is 2 pulleys in one, the larger diameter is 98 and the smaller diameter is 72mm.

The rest of the pictures show the different parts and the frame/cabinet that make up the new lathe.

If this works how I hope it will I'll have a wood lathe that will turn a metre+ between centres and it will allow bowls up to 500mm in diameter.

Hi fozz,
That looks like a nice find. I like your sliding bed design too. Looking forward to seeing the finished item.
Regards
John

Well its all there, with bronze bearings you have to keep the lubrication up to them no matter what. If your able try and install some sort of automated system, some of the old time reservoir type with the wicking setup would be ideal.

Delta International Sales this sort lubes as you use the lathe only


scroll down through the doc for info
http://www.conbear.com/dc/ALEMLUBE%2...%20page(1).pdf

Hughie, thanks for the pdf, some very interesting reading.

On the matter of grease, the caps on the lathe hold about 3/4's of an inch by an inch of grease in each one. What sort of time should that grease last, i.e, 5 minutes, 30, an hour ?

Hey that looks great - nice restoration - thanks for showing us

Gday folks, did a quick trip down to 's sunday morning for a coffee, bit of BS spin and some help.

Thankyou very much , after a chat and a gift I came home, did abit of machining on the metal lathe and now the reco wood lathe not only has a modernised head stock but now has a live centre for the tail stoke.

I am one happy chappy!!!!!

The next job is to work out the mounting for the motor and pick up a couple of V belt pulleys and belt to suit and flat belt and the lathe will be ready to fire up.

Originally Posted by fozz

The next job is to work out the mounting for the motor and pick up a couple of V belt pulleys and belt to suit and flat belt and the lathe will be ready to fire up.

For the flat belt get a serpentine belt as used by modern auto engines.

Leather is very authentic, and expensive. Folks with flat belt metal lathes use serpentine belts because they transmit more power without slipping, and do not have the clack, clack, clack of the metal splice of a leather belt.

Check with your mechanic about a free used one removed from a car. 25mm will transmit 1 HP. They can be spliced with a skived joint and CA glue for plastics.

You could always buy the right length new, not that expensive.

If you need more info, send me a PM with your email address and I will send you a pdf with full instructions.

Neat lathe, the low speeds will be nice for roughing out 500mm bowls.

When working, occasionally feel the bearing caps, when they get warmer than comfortable, add grease.

Hi folks,

I know this has been some time in the works, others things became more important so the lathe got pushed to the back of the list.

I've since made a 3 cog pulley out of timber to match the metal one I have, didnt have a 25mm drill bit or boring bar to make the metal pulley fit the jack shaft.

The head and tail stock now line up within a gnats whisker, just need to work out how to mount the motor and jack shaft and fingers crossed it'll be a goer.

Well Folks,

Had a productive day today. The jack shaft is now fixed in placed with the turned 3 cog block. The flat belt has been cut and roughly joined for now, will see if that does the trick.

I do have another flat belt, this was I cut to size but I forgot to cut both ends hence the daggy holes that show up in the pic. I dont know if wire is the go but the belt originally was joined with leather strip and wire.

One thing I was wondering about, does the leather belt need to be oiled or not cos I think its as old as the rest of the lathe.

Tomorrow I'll mount the jack shaft and motor to the lathe and hopefully fire the monster up, fingers crossed.