smokeless cutting oil

[Chris12Participant @chris12]

What kind of system do you have to collect the coolant ? Just a basic tray, or something with higher edges ? A common complaint about the use of coolant is that it ends up everywhere.

 

Thinking about a proper coolant system now…

[Julie Ann]

On Julie Ann Said:

As discussed above CT-90 acts a lubricant when tapping/reaming, often by hand. It is not intended for turning, which is why you didn’t see any difference. Cutting oils intended for machining are primarily used for lubrication where high cutting forces are involved; gear shaping for instance.

 

Just to clarify one things : I am not using CT-90 for turning. I’m am using Rock Oil cutting and tapping fluid, which is sold for cutting. But to my understanding now it is mainly for heavy (aka industrial) turning operations more than light duty cuts in a hobby machine shop.

[Mark EasingwoodParticipant @markeasingwood33578]

Like Graham Meek, I have some Smith and Allan neatcut 32, I just dab it on with a brush as required, you can get it direct from Smith and Allan, or via their Ebay shop. It will smoke if you get it hot though.

I can’t give a comparison, as it’s the only one I have tried.

Mark.

[Howard LewisParticipant @howardlewis46836]

If the tool is not sharp, and mounted on centre height, it will generate excess heat, which will result in smoke.

I part off under power, with an inverted Zero top rake parting tool. Applying ordinary lubricating oil by brush, or oil can, does not produce smoke. But the speed is low and the feed is 0.060 mm/rev.

Are you running at too high a surface speed for the material being cut?

Don’t try to use industrial surface speeds / feeds on a hobby machine, which is not designed for those sorts of cuts or feed rates, and lacks the power.

A mini lathe is likely to have a 500 watts brushless motor, not a three phase 20 hp motor.

Howard

[JasonBModerator @jasonb]

I’m of the opposite view, as the electronically speed controlled hobby machines don’t have much grunt at lower speeds I like to run them on the fast side particularly as the diameter goes up so the motor is running closer to it’s optimum which is quite possible with carbide. However moderate depths of cut and feed rates should be used as that does not need the horsepower that a deeper cut requires.

Even well below industrial speeds you will smoke that Rockoil product on the lathe when turning unless it is being pumped on at a high rate. Keep it for hand work or as I said light finish cuts wher less heat is generated.

[Author]

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