Lathe cover

[Steve MillwardParticipant @stevemillward84705]

Cover for lathe to stop rust

[Steve MillwardParticipant @stevemillward84705]

Hi everyone

i was just wondering if many people use a cover for lathe when not using

if not is there a way to stop rust

Cheers

steve

[Andrew TinsleyParticipant @andrewtinsley63637]

I use one to stop dust. Unfortunately a cover won't stop rust. You either need to use a dehumidifier in the workshop, or use some form of anti rust liquid on the lathe. Arc Euro do such an item amongst others.

Andrew.

[Anonymous]

Posted by Steve Millward on 14/07/2021 11:10:12:

i was just wondering if many people use a cover for lathe………..

I started off with covers on the lathe and vertical mill, but stopped using them fairly quickly. Unless there is a heater under the cover they just accentuate the rust problem by stopping air from circulating. I spray all the machines with WD40 now and again, and the slideways are oily anyway. I don't generally have a problem with rust. My workshop is fairly well ventilated as there's a gap top and bottom on the garage door due to cowboy installation.

Andrew

[Bo’sunParticipant @bosun58570]

Another vote for a dehumidifier. A desiccant type would be my choice rather than a refrigerant type, because they tend to perform better at lower temperatures. A permanent drain if you can, and keep the doors shut or you'll be dehumidifying the world.

[Jon LawesParticipant @jonlawes51698]

I use an old wool blanket to stop rapid changes of temperature of the lathe; breathable but able to reduce the risk of sharp temperature gradients that would encourage moisture formation. It's the same blanket my grandad used on the lathe when he bought it new. My workshop is now dehumidified anyway so its more habit than anything, but it's worked for him and his was a workshop cut into a damp hillside with no heating.

[JAParticipant @ja]

Good question – not a beginner's one.

I am a believer in covering lathes and milling machines. In summer I am relaxed about it but come the cooler weather the machines are covered when not in use.

My workshop is dry but poorly heated. After cleaning the machine I used to spray it with WD40 and then squirt slideway oil at the exposed metal work before put on the cover. I no longer use WD40. I think the cover gives the machine its own little environment. I hope that it contains a useful amount of oil vapour to help protection.

Covers must not be porous. The Myford has a transparent plastic cover sold by Myford, the milling machine a garden seat cover and the little Cowells lathe a nice PVC cover I had made for it for about £30. The Myford cover has a life of around three years before it goes stiff and brittle.

Occasionally I think about making machine heaters similar to that shown in MEW of November 2003. Then I ask myself why, when I do not have a rust problem.

JA

[Jon LawesParticipant @jonlawes51698]

I think the lathe cover being porous is a question that divides people: my opinion is that I would rather trapped moisture could escape, however I understand your reasons for asserting that it should be a solid barrier.

As for a machine heater, I have heard of people placing a small bulb (such as a cooker lamp) under their slideways to keep the temperature at a sensible level.

[Steve MillwardParticipant @stevemillward84705]

Cheers all I think I’ll try a small dehumidifier see how it goes I’ve had a single quilt cover in upto now

it seems to work ok apart from slight rust on 3 jaw Chuck

thanks for all replies

steve

[Jon LawesParticipant @jonlawes51698]

I used one from screwfix that has been very good so far.

[Peter G. ShawParticipant @peterg-shaw75338]

When I first started in this game I used to suffer from rust and so I used to use WD40 quite liberally. Trouble is that it needs wiping off before use. Then I started to cover the lathe with a piece of cloth followed by a piece of plastic sheet. The logic here was to try and keep it warmish, to keep dust of it, and because the garage roof wasn't too clever, to protect the lathe against any leaks. Didn't stop the rust though.

Eventually, through the medium of ME & MEW with people reporting using, eg, a low power bulb under the lathe, I opted for some self-regulating heaters from RS, part no 360 4059. These devices maintain, or try to maintain, a constant temperature. The ones I bought were rated at 10W but actully seem to run at 18W. I fitted two to my lathe bed, and no mure rust ever since. I still use the cloth & plastic covers though.

I suppose there is a snag in that with two running permanently at 18W or 36W in total then there is a cost in electricity, but for me it's worth it.

Regards,

Peter G. Shaw

[not done it yetParticipant @notdoneityet]

There are breathable fabrics which only allow water passage in one direction.

More expensive, no doubt, but more effective.

I only cover my machines when dust is likely to present a problem. The workshop is dried (and warmed a bit) by one or two meaco dd8l desiccant dehumidifiers. Cheap and cheerful, easily found secondhand (usually not working, if cheap) but easy to repair. They are not particularly reliable, but I have a repaired spare in hand…

They are used with timers and don’t cost so much to keep the humidity reasonably low and the temperature well above zero in winter. I generally run two when away from home in the winter – if one stops there is still some action and two can collect twice as much as one, before they are full up.

My smallish workshop is very well insulated – minimum of 100mm insulation (around and over most of it) and virtually air-tight.

[Chris MateParticipant @chrismate31303]

I don't have a rust problem, wife made a cover , but after some time however I decided to use a motorcycle cover breathing type, easy/quick/light to remove and put back on, it keeps dust out, so far no problems with it.

[Dave SParticipant @daves59043]

My lathe ways get a good coverage of way oil during use, they don’t seem to rust when standing.

Same for the mill.
Both machines have a reservoir for the oil, I just keep it topped up.

No covers here.

Dave

[bernard towersParticipant @bernardtowers37738]

No covers use hydraulic oil as cutting oil problem disappears

[Chris CrewParticipant @chriscrew66644]

I have very little trouble with rust in the workshop and have never used any sort of cover over the machines. Why I have been spared this particular pestilence is difficult to say. I do use liberal amounts of soluble coolant which tends to leave an oily residue, presumably after the water evaporates, and I do have an old convector heater under the bench on its lowest possible setting switched on 24/7/365 but this doesn't kick in much below about 45 deg's in the winter and cold spring months. The workshop is a 21' x 13' pre-cast concrete garage with four single-glazed side windows, with the up-and-over door aperture replaced by a ship-lap 'site office' type front with a large single-glazed window. The original corrugated 'asbestos' roof failed with hair-line cracks after a few years, I presume because of the distortion of the A-frame trusses caused by me hanging so much shelving from them and this did give me a rust problem, so I fixed 2" x 2" purlins along the outside of the roof, put loft insulation between them and bolted a powder-coated sheet steel roof over the top of it all. I have had no further trouble since. This is the only insulation the workshop has, the inner walls are just pre-cast concrete panels painted white. As the window frames are getting near their 'sell-by' date I have considered replacing them with double-glazed units but the Maitresse de Maison keeps robbing me of any spare funds!

[CirclipParticipant @circlip]

Suggested these a while ago as an alternative to a bulb -https://www.tlc-direct.co.uk/Main_Index/Heating_Index/Tubular_Heaters/index.html. Scroll down to 45W tubular heater, midern variant of the Piano heater.

No affiliation.

Regards Ian.

Edited By Circlip on 15/07/2021 08:50:38

[Rob Thomas 4Participant @robthomas4]

I've used this treatment (ACF 50) on my precious motorbike and lathe over winter in a marine environment to good effect. A bit pricey, but then most things which are good are seldom cheap!

http://www.acf-50.co.uk

Regards,

Rob.

[Dave HalfordParticipant @davehalford22513]

I've found that anything that has rust on it already will get worse, right next to a pristine lump of fresh shiney steel.

if you blast clean a rusty thing to a uniform grey it will stay good for days. If you leave tiny black spots in the metal, rust will bloom out of them over night.

[Pete RimmerParticipant @peterimmer30576]

An ordinary bedsheet makes a good cover and I find duck oil liberally diluted with brake cleaner in a pump pressure pot makes not only a good cleaner but a decent preservative too. I must stress though, I don't have any rust problems within the workshop.

[noel shelleyParticipant @noelshelley55608]

If You blast clean steel or iron, in the pesence or moisture I have seen it turn red in 20 minutes, amazing ! I bought a Myford plastic cover 30 years ago, it is still soft and supple, not hard and cracking ! Be VERY careful with brake cleaner it is HIGHLY INFLAMABLE, DO NOT use in an enclosed space without good ventilation, THE VOICE OF EXPERIENCE ! Noel

PS brake cleaner is a great engine starter fluid, lawn mowers and 2strokes – NO CHOKE !

[Howard LewisParticipant @howardlewis46836]

Ditto for Noel's experience, of clean steel rusting almost as you watch, if unprotected.

The chap who sold me my mini lathe also donated the MDF cover that he had made for it in his unheated outbuilding. The lathe was free of rust, and has remained so under this cover in an unheated garage.

Being open at the bottom, any moist air can escape downwards. Protected by a film of oil, the lathe remains rust free.

Except when low temperatures are expected, the big lathe is in an unheated but well insulated small shop.

When low temperatures are likely, the small shop is warmed by a 60W tubular heater under the bench. After two days, the steel bench is warm rather than cold., so above the dew point.

Again, it collects a thin film of oil over the ways during use, and remains rust free, as does the Mill/Drill..

Before this shop, the uncovered ML7 coated thickly with oil, used to go grey as the oil emulsified when the shop was unheated.

The recipe seems to be an impervious cover, open at the bottom, with a thin oil film, if no heat is available.

Howard

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