The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
AdeV:
I'm sure I've mentioned this before.... but I use this stuff: http://www.lubetechshop.co.uk/product_info.php?cPath=25_51&products_id=291
Last time I put any in the Bridgeport CNC sump was, um, 3 years ago? Maybe 4 years now. No bad smells yet! (and it still looks like it should do, hasn't gone lumpy, etc.). I've not got a skimmer either, so there's definitely a layer of tramp oil on it...
awemawson:
I'm sure it's fine Ade, but a brief bit of Googling doesn't reveal any actual product data re sulphur, chloride or silicone content etc nor does anything make reference to grinding operations :scratch:
At least the Castrol products abound with specifications and data. My local oil supplier (Rye Oils) will sell me extremely cheap 205 litre drums of 'General Use' soluble oil, but I avoid it for the same reason.
My advice is to somehow get rid of your tramp oil, you may not yet have suffered any ill effects, but they are very well documented.
What Brix do you dilute it to ?
AdeV:
--- Quote from: awemawson on January 02, 2019, 02:30:38 PM ---I'm sure it's fine Ade, but a brief bit of Googling doesn't reveal any actual product data re sulphur, chloride or silicone content etc nor does anything make reference to grinding operations :scratch:
--- End quote ---
The same place sells another soluble oil suitable for grinding - it's a bit over £100 for 25l, but I've no experience of that one.
I'm sure if you e-mailed the shop they'd send you technical data, MSDS, etc. Personally, I've never bothered, and it seem to work fine.
--- Quote from: awemawson on January 02, 2019, 02:30:38 PM ---What Brix do you dilute it to ?
--- End quote ---
Brix?
I put about 20l of water on 5l of oil, so around 10% or so.
awemawson:
My quest was to find a soluble oil that I could use across all my machines and metals, so manual lathe and mill, CNC lathe and mill, and also a cylindrical grinder and a surface grinder with soft and hard steels, brass, aluminium etc. The Castrol Hysol SL 37 XBB does this and, like the stuff you mentioned, is a bit over £100 per drum.
Brix is the concentration scale for things dissolved in water - commonly sugars but in our line also soluble oils. You measure it with a refractometer by placing a drop of the mixture on a glass window, trapping it with a cover and measuring the refraction by looking through the calibrated eye piece.
(Very handy for checking the concentration as time goes by and evaporated water has to be replaced - I had to add 6 gallons of water the the Partsmaster yesterday :bugeye:)
awemawson:
Yesterday the Tramp Oil Skimmer arrived, so I was able to weld up the 'gallows bracket' to mount it, and give it a coat of the obligatory zinc rich primer and satin black top coats from a rattle can.
(Incidentally having replaced the wire rollers on the Migatronic welder has made a world of a difference to it's performance)
The base, which I cut on the CNC plasma table so I could radius the corners and cut a slot for the vertical, is held down on rare earth magnets on Delrin stand offs that allow me to adjust the depth of immersion.
Today I assembled it, put the correct plug on the cable, trepanned the hole in the tank, and installed it with a 5 litre catch can.
The belt is rather creased from being crammed into it's box, and the drive is a bit hesitant at times, but when it gets soaked in coolant I'm sure it will be fine.
. . . .coolant . . .that reminds me . . .it hasn't been delivered yet :scratch:
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