WM180 change wheels

Hi all I have just recently purchased a Warco WM180 lathe. The machine runs very well however the fine feed selection gear wheels run very noisy. Over greasing them would possibly cause belt slippage to the motor drive. I am open to ideas from anyone who has experienced of this problem.

Thank you Bernard Reilly Scotland.

The noise may be caused by incorrect meshing of the gears. Too little backlash will cause noise and premature wear. Too much backlash will cause noise and an inconsistent feed rate.

The gears should be meshed with a piece of card or paper between them, about 0.003" (0.075 mm ) thick to set the correct amount of backlash.  Obviously, remove once the meshing has been set.

You must expect some noise. Even precision ground gears emit some noise.

Heavy grease will reduce noise, but as you say, should be kept away from belts and pulleys.

The gears on your lathe are unlikely to be as precisely manufactured as those in your car gearbox, and they make some noise.

Howard

Edited By Howard Lewis on 22/08/2020 12:22:20

Not with your model lathe, but change wheels can run noisily if the backlash is not set correctly. If adjusted correctly, I would be checking for wear or damage to the gear teeth.

Um, metal change gears are noisy so could be normal.

However, the amount of meshing between teeth can make a big difference. I set each gear apart on the banjo with strip of thick paper (or a strip of ordinary A4 printer paper doubled over). Setting the gears too close makes grinding noises and having them too far apart causes banging and rattling. A mixture of too close and too far apart on the same train is the worst combination. Too close can cause problems if a pair of gears aren't quite circular because they can cam together at certain points, adding to the racket and stressing the teeth. Experiment with different thicknesses of paper.

Change gears aren't precision, nor are they ground to reduce whine at high speeds like a car gearbox. Functional rather than ear-friendly. Plastic gears are much quieter.

Dave

.. 'The gears should be meshed with a piece of card or paper between them, about 0.003" (0.075 mm ) thick to set the correct amount of backlash. Obviously, remove once the meshing has been set'...

+1 for all comments. I've set my backlash as above with a piece of A4 paper, doubled over, for each gear on the banjo... as for lubricating the gears I use motor bike chain oil...

George.

As well as correct meshing close attention should be paid to the washers that fit between banjo and gear as they are different thicknesses, if you get them wrong the sides of the gears can rub giving a ringing sound. Thin washer should go against a large gear and thick washer against a small one.

And by not doing that, I managed to strip the very short thread on a mounting stud. So I made 3 new ones, out of an old aircraft bolt, that are much more satisfactory.

That was after five years of use.

I find it easiest to adjust the gears on the banjo first starting by the last gear on the train. Using the paper method is good but too fiddly so I just make sure there is some backlash by eye and feel, you will soon get used to it after spending some time on it. As Jason mentioned above pay attention to the side clearance as well, apart from the washers, moving the banjo in and out will also effect this clearance.

Wm180 change gears further to my post I as advised contacted You- Engraving .com. He supplied all the gears required in Delrin at a fair price a few spares. My lathe is now running a lot noise free therefore no more infernal din from the metal gears supplied by Warco. I have have no connection with company only a satisfied customer.

Bernard Glasgow.

My modified Kaimac 180 lathe feed geatrain makes to much noise when feeding 0.083mm at 1000 rpm,but is not objectionable when thread-cutting at 60-90 rpm.

I would like to have finer feed for most jobs and I do not like the lubrication monkey buisness for first gear contact and the special stud that have been nessecary.

I is maybe worth asking You engraving for a quote on a solid say 76/20 compound gear in Delrin running on a special 12mm stud.

Not a lot lubrication close to belt and noise very much lower

What not to like?

Edited By Niels Abildgaard on 22/10/2020 16:39:23

.

Sorry if I’m being dim, Bernard ... but yours is the first mention of the word ‘engraving’ that I can find in this thread.

Could you please clarify ?

Thanks

MichaelG.

You Engraving is Nom du Guere for a gentleman that offers very reasonable ,well made gears to order via E-Bay.

I think I recommended him to Bernard two months ago and gave a link that was confiscated by our never sleeping guardians of good conduct.

A little winded

Edited By Niels Abildgaard on 22/10/2020 17:44:39

Many thanks, Niels

MichaelG.

Oh for gods sake this is ridiculous!, how come an Ebay supplier selling decent products is 'verboten' I'm thinking of getting a Delrin gear but have to trawl the net to find said supplier?

Tony

Found him

Edited By Tony Pratt 1 on 22/10/2020 18:10:52

I seem to remember being surprised but after reading Neils explanation I was not offended .

We are very priviledged to have such a soapbox speakers corner and something has to pay the rent.

My only wish is that resolution limit on saved photos could be higher.

Please excuse my bad memory.

ME had not confiscated a link to You Engraving

It must have been something else.

Bernard :How did You unite the 20 teeth Module One Delrin gear with the 80?

The normal Bush/Key system is 12mm dia and key protudes 1.5mm that leaves ca 1.4 mm Delrin between key and bottom of tooth-gap.Has it stood test of time?

Edited By Niels Abildgaard on 24/10/2020 16:16:51

Edited By Niels Abildgaard on 24/10/2020 16:18:15

Tony try spending a couple of seconds searching, third hit on my results was where Neils mentioned the seller previously and it's still there. The two earlier hits were for this thread.

Both Tony and Michael were even active in that actual thread!

Post Edited as I missed Neils last one. It was a link to a Chinese sourced lathe that was removed.

Edited By JasonB on 24/10/2020 17:12:32

.

But Bernard wrote [in this thread] :

as advised contacted You- Engraving .com.

... which is what I was querying

MichaelG.