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QUOTE .. I could not find out what to use as cutting fluid so I used copious quantities of WD40 and probably did my lungs no good at all breathing the fumes as it vaporised when it touched the tip of the cutting tool.
I use Clarke cutting fluid from Machine Mart, applied using a kids paintbrush as my lathe has no pumped coolant system.
£8.39 for a 1 litre plastic bottle and it works really well for titanium.
For titanium, I would use a slow spindle speed and a fairly heavy feed, which also helps to keep the heat down.
I also avoid taking light skimming cuts as this tends to make the material work harden. It cuts much better if you give the tool a decent depth of cut to get its teeth into.
If you pm Capo, he can tell you where he got his ti swinger spindle "diamond" coated.
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