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Participant

Join Date: May 2010
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Substitute for ISO46 Hydraulic oil

05/07/2010 7:41 PM

I have a small metalworking lathe with a gear head spindle and an enclosed gearbox.

The manufacturer recommends ISO46 Hydraulic Oil for both. I need a bit, to fill the gearbox, and find the smallest I can buy is a 20 liter drum; I need about 1/2 a liter.

Is there something else that might be a suitable substitute that I can buy in smaller quantities?

Thanks for any thoughts.

Alan

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#1

Re: Substitute for ISO46 Hydraulic oil

05/07/2010 8:36 PM

Hi Alan, a half liter is not that much indeed. I am wondering if the oil is for a machine that fills your daily needs?

In this case (if the oil in it has some age already) I should treat it on a total refill and buy the 20 liter.

If you are good for your machine, the machine will be good to you.

In hydraulic oils that is about the smallest quantity (5gln -20 liter) for the industry. If it is just for your hobby, I should try to find some one who is using the same oil and buy some from him.

If you don't find the same, go for a hydraulic oil that is used in heavy equipment machinery like back ho, excavator or bulldozer.

Mixing with normal grade motor oil is not advisable, - can be bad for rubber O rings. How much oil is in the circuit? Topping off is not always advisable too.

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#2
In reply to #1

Re: Substitute for ISO46 Hydraulic oil

05/07/2010 10:30 PM

Thanks for the reply!

The machine is for my hobby, and will run maybe an hour a week .. maybe.

I'm not averse to spending the money, it's just that I REALLY have no place to store it. The idea of buying some off someone else is a possibility.

I was only thinking of filling the gearbox (1/2 liter), as the headstock (another 1/2 liter) is full, but I take your point about just going with all new oil. And I suppose that if I have LOTS of it, I can run a whole bunch through to be sure of getting all the old oil out (I'm always leery about mixing oils).

Thanks again.

Alan

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Guru

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#3

Re: Substitute for ISO46 Hydraulic oil

05/08/2010 1:54 AM

Hello Alan, Here is a Google search shopping for your ISO46 oil. I found it in Gallon jugs.

And the prices looked good also. Hope this helps you to get enough oil without having to buy more than needed to do an oil change with a little to top off with when needed.

Charles

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#4

Re: Substitute for ISO46 Hydraulic oil

05/08/2010 9:48 AM

Dear Alan,

You can try the mineral based transformer oil which is commonly of viscosity of 32 CSt. provided that the machine temperature remains below or around 35 degree Celsius. At more temperature the lubricity will be less and the possibility of leakage will be more.

Regards.

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#5

Re: Substitute for ISO46 Hydraulic oil

05/08/2010 10:58 AM

Most industrial supply houses sell it by the gallon.

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#6

Re: Substitute for ISO46 Hydraulic oil

05/08/2010 10:42 PM
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#7

Re: Substitute for ISO46 Hydraulic oil

05/09/2010 9:30 AM

I'm sure any good hydraulic oil with a similar viscocity would work just fine. unless it would void any warranties You might have. Any automotive store would be able to help You.

oilcan13

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#8

Re: Substitute for ISO46 Hydraulic oil

05/09/2010 2:30 PM

I would be extremely surprised if ATF for any car auto trans would not work very well. It is an excellent gear and hydraulic oil, with antifoam properties. IT is kind to seal, unless the seals are designed for a very unusual hydraulic fluid.

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#9
In reply to #8

Re: Substitute for ISO46 Hydraulic oil

05/10/2010 10:24 AM

I'll second that. I used to run a turret press that spec'd ISO46. We kept a 55 gallon drum of Mercron Dexron III ATF we used for annual oil changes.

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#11
In reply to #8

Re: Substitute for ISO46 Hydraulic oil

05/11/2010 11:21 PM

topping up ISO 46 with ATF is not reccommended. If the whole system is drained and flushed then I would agree ATF maybe "maybe" used in place of hydraulic oils. But I like to use what the manufacture reccommends.

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#10

Re: Substitute for ISO46 Hydraulic oil

05/10/2010 11:16 AM

ISO 46 hydraulic oil is a very common designation. I am sure it is available in small quantities.

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alan-bc (1); Anonymous Poster (2); DaveB (1); dvmdsc (1); himart (1); metalSmiths (1); MIKE L. (1); oilcan13 (1); ozzb (1); rssahni (1)

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