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Water cooled oil cooler

post #1 of 5
Thread Starter 
This is a non-pc project as some of you know I'm working on converting my lathe to CNC control.
I'm going to increase my spindle speed from 1750 (max rated speed) to 3450 RPM so I was thinking of water cooling the spindle head.

I have all the WC items already "in stock" so this is one of "those" experiments.

Here's my thoughts:
The spindle housing is filled with 20w oil so I originally thought of coiled soft copper tubing, but after measuring I think it will hold a 120 rad full submerged in the oil. I would then bring it out via bulkhead fittings to a 480 rad.

Any thoughts on conductivity?

Another idea might be just running the oil through the 480 rad just not sure a Swiftech MCP655 could move the oil and push it through the rad. with about 2' of head using 1/2" tubing.
    
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post #2 of 5
May need more than one pump.

Is the heat of the oil the only concern when running the lathe at nearly double max rated speeds?
Black Sand
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post #3 of 5
Thread Starter 
Main thing is to keep spindle bearing cooled. I'm going to upgrade to precision bearings rated for increased speed, but also have to consider extra heat being generated on pieces being cut transferring to spindle (that might not be a big problem as I'm also installing flood coolant system for cuts).

Another problem is it's a splash system and I'm removing all the gears so there may be little movement in the oil.
    
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post #4 of 5
is the motor brushless?
sorry thats plain vague!
Is the Motor that does the cutting via gears a brushless model?
I'm thinking of increased wear on that part and changing brushes to be filthy and tedious.
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post #5 of 5
Thread Starter 
Yes, it's a 3 phase 1.5 HP running through a VFD drive that will be controlled via PC.

The stand will be a HUGE PC case! Almost 6' long. Yes it will have LED fans.smile.gif
    
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