Above all DO NOT DESPAIR!

It might sound complicated, but all is doable.

Like eating an elephant, one bite at a time.

Overcome one obstacle at a time.

On the way, you will learn a lot of new skills, but not instantly.

What lathe have you got?

Howard

Your photo shows it is very similar to a George Adams 2 1/2 in lathe https://www.lathes.co.uk/george-adams/page7.html
but while several details are different you could use it as an example of what it can do. It is likely that it is intended as a clockmaker’s lathe (ie bigger than watches, not as big as bicycle maintenance) and made between 1890 and 1920. The rotating topslide and central braces inside the headstock are distinctive I think.
The site above shows some ideas for a treadle system and through that you can also deduce that the larger size variable speed sewing machine motors would be suitable. Even a small sewing machine motor would get you going as you might easily pick up a broken sewing machine (ask charity shops if they offered one to save it for you) and you can later use the motor for a clock gear cutter frame.

Britannia No 2 another possibility
https://www.lathes.co.uk/britannia/index.html

For home use, you are unlikely to have 3 phase power supplies, so just think single phase.

My preference would be for the 0.55Kw motor, and to make up a countershaft. Probably you can buy pulleys (Picador springs to mind.)

Your lathe is old, very old, likely to be over 100 years old, but still capable of reasonable work, in the right hands, and in fair condition..

Your lathe is almost certain to have plain bearings, most probably the steel spindle runs in the cast iron Headstock, so speed will be limited. 700 rpm will quite fast enough as top speed, and and fairly frequent oiling.

How high is the centre from the bed?

In UK lathes are usually referred to by centre height, such as “3 1/2″ which means that it could swing work up to 7″ diameter. The centre distance is the maximum distance that can be obtained between a centre in the Headstock and the one in the tailstock, say 15”

Our American cousins describe lathes by the swing and centre distance,  such as “7 x 15″

It does not have a graduated dial for the Cross Slide.  Once it is operable, I would suggest making one.

Just a plain disc would allow you do what the old timers did, which was to put a pencil mark on the disc, and then nudge the dial slightly, take a cut, before measuring the workpiece again. It may be possible to make slightly crude graduations.

Firstly, you need to measure the pitch of the leadscrew (How far the tool advances for one turn of the handle (Rotate the handle by 10 turns and measure how far it has travelled. The pitch, will be 1/10 of that distance. It would be nice if it was 10 t p i (threads per inch.)  if you could make 100 graduations, each division would be 0.001″ There could be times when you wanted to work to that level of precision.

If it is 8 tpi, 25 graduations would each be 0.005″ (The thickness of a human hair approximately)

How do you graduate a dial?

Ideally, turn the disc so that it has a circumference of 100 units of distance, such as 3.183 ” diameter or to confuse things, but keep things to a more sensible size, 31.83 mm. Having made a mark, using dividers, make another mark 11 mm away.

Then using that mark, make another 11 mm away, (11 will be easier to set than 1 mm) . Keep doing this until you have 100 marks around the rim of the dial. Then go back and make every tenth mark longer, and then make every fifth mark of a length between the units and the tenths.

There are more accurate ways of graduating a dial, but you do not have the equipment, or at this stage, the experience to use it.

The dial needs to be fixed to the leadscrew, so needs a boss, with a thread tapped into it for a grubscrew to clamp it to the shaft. The ability to unclamp the dial, and move it, makes it resettable.

You need to find someone who is willing to help you; preferably nearby.

Is there a model engineering club near to you?

If so go and join. You will get face to face advice and practical help, to back up what you have read in the books.

Once the lathe is up and running, do not start trying to make things, at once. Just start learning the basics, like being able to turn the handwheel slowly and steadily, either to move the Saddle along the bed, for turning, or the Cross Slide across the bed for facing. Just practice by turning and facing bits of mild steel to get the feel of the lathe. Once you have the dial graduated, just take cuts of 0.005″. You will find that the diameter has reduced by 0.010″!

For measuring, you need something like a digital calliper. Keep and eye on LIDL or ALDI, from time to time they sell them for about £10, Get some spare batteries at the same time. They always run out on a Saturday evening!

The four jaw chuck is a useful item, but will not self centre. Each jaw can be adjusted to bring work as close to on centre as you wish, or as far off centre if needed.

But you will need to learn how to do this, and for real accuracy, needs measuring equipment, such as Dial Test Indicator, and Magnetic Base.

If you could find a 3 jaw self centering chuck, life would be a little simpler, but you would need help on choosing and fitting a suitable chuck to the lathe.

Although described as self centering, a 3 jaw chuck will not hold work ABSOLUTELY central, it is likely to be, even with a good one, eccentric by about 0.003″ Poor or worn ones will be worse! I came across one that was over 1/32″ eccentric! But there are ways round even that degree of error!

It may seem that there is a lot to learn, but you are entering a field that is completely new to you.

My very first lathe was home made and powered by my pistol drill, so not all precise! But It sufficed to turn a bit of broom handle to align the clutch on a car.

Every step, no matter how small, is another up the learning curve.

We all had to start once!

Howard

Not read all the previous post but as far as the motor goes ! Anything above 250W is fine for a small lathe 370w or 550w will also work. Speed 1420  (NOT 2850 ) or so,it’s a 4pole motor and 220/240V single phase. Don’t worry about reversing at this stage ( if at all ) but a No Volt Release switch would be a good idea – mounted where you can instinctively hit it as a panic button. The cost of a proper motor starter with overload may not be a priority now but is worth considering as a fuse does NOT protect the motor though motors are reliable.

If there is a Club near you it would be worth joining, you should find plenty of help/advice – you don’t have to be a model engineer.

Good Luck and Best Wishes  Noel.

On 4 August 2025 at 20:53 Brahma Said:

…

This is probably going to sound really daft and obvious to you folks, but can you explain something to me about power.  I know this is a bit of an electrical query, but hoping you can help clarify for me.

The motor I started the thread with, is 220 / 240v, 45w with 1425rpm.  In my searches to try and get what I think you’re recommending, I’ve found 0.37kw with 1440 4-pole, 0.55kw with 1440 4-pole, 0.37kW,  2730RPM (2-Pole) Electric Motor 3-Phase 400v.

What the heck?!  What is better – 45w with 1425 rpm?  .37kw with 1440rpm, 55kw with 1440 rpm?  Single phase?  3-phase?!

Thanks all

Not daft or obvious!

None of them are ‘better’, ratings match the motor to the job.

Motors have four important characteristics: speed, power, torque, and duty cycle.    Power is rate of doing work.  My rule of thumb is an example of work done in period of time:  1HP removes 1 cubic inch of mild-steel in one minute.   Power is measured in Watts or Horsepower (1HP = 750W).   HP dates back to when the world was full of horses and everyone had a feel for how much work they could do, and for how long they could work before needing a rest!   Better to stick with watts in my opinion.

Very roughly, an ordinary fit man can output about 200W continuously, and a high end athlete might manage a burst of 1500W.  Sawing wood or metal by hand consumes up to 200W, so can imagine roughly how much metal 45W will remove – not much, but valuable if done accurately.    Likewise, a half or 3/4HP (500W) motor will do more work in a given time than most humans, and they don’t get tired.  A 2HP (1500W) motor leaves humans in the dust.

Animals have a duty cycle, and so do motors.  An electric motor’s duty cycle is determined by how hot it can get before the insulation is damaged.  Motors can be engineered to run all the time, 100%, but they’re heavy and expensive, which is often wasteful because most electric motors work in bursts.   Very common for motors to be rated for intermittent work, delivering power in short bursts with time to cool down between.   Rating plates are often coy about duty cycle, but 50% is common, and some are as low as 10%.

Again, the rating is matched to the requirement.  Hobby turning tends to be intermittent.  The operator spends a lot of time thinking, adjusting the tool and work-holding, and resetting the carriage between cuts.   Not much time is spent cutting so the lathe’s motor has plenty of time to cool off.

We don’t have to insist on an expensive motor.  Except when a lot of metal has to be removed it’s tempting to push the lathe.   Likely to end in tears if done to a hobby lathe, because the motor, electronics, and drive train aren’t rated for that level of over-work.  Industrial lathes are designed to work flat out for several years, and their big heavy motors are one reason why they’re 6 to 20x more costly than a hobby lathe.

Torque is “turning power”, the ability to rotate a load, particularly important when a motor is starting.   Though there’s a relationship between power and torque, it’s not obvious.   Not critical provided the motor can turn the spindle from a cold start, which most motors will do, unless they’re just too small.   A 45W single-phase motor is on the small side for torque, a 90W motor should be OK for this lathe.

UK homes come with a 240Vac 50Hz single-phase supply which is convenient for everything apart from motors.   Single-phase motors are all compromises.  They vibrate, have a low power to weight ratio, low torque, and are inefficient and unreliable.  Not unacceptably bad though!

Three-phase motors are simple, smooth,  reliable and inexpensive.  Unfortunately it’s difficult to get 3-phase installed in an ordinary home.  There are ways of generating 3-phase from single-phase, all with pros and cons, and it can be messy.  Electronics have revolutionised motors, much more choice today, because high-power 3-phase and DC are both affordable.  Buying a new lathe, brushless DC motors outperform 3-phase.  And you might fit a industrial sewing machine motor, about £120 with speed controller from ebay.   600W is over the top, though that means it won’t need belt-change and multiple pulleys to change speed!

Some very good advice there, so dont lose heart.

Motor speed 1400, power 1/4 HP should be perfect.

You will need a countershaft to get lower speeds [kinder to this machine ] but such items are not too difficult to make. Plummer blocks are available from Ali Express quite cheaply and would be ideal

My first sawbench was made like that from junk [long before Ali Express came along ] and it worked !

You wont do Space Age work on your machine, but remember you,re in a classroom, not a production shop. Get started, make scrap as we all do [we tend to refer to it as “Projects”]  Something does,nt work out ? welcome to the club !

Tomorrow is another day

That will be fine for pen cases or lace bobbins.

You just have to remove the carriage and make work rest for your chisels.

Oil the bearings every time you use it.