Originally Posted by rhino Hi.
When machining these parts; the most common reason for poor finish is due to alum. build up on the cutting tool(where alum. cakes itself to the tool). i use Kerosene as a coolant, this way it doesn't build up on the tool and gives a good finish.
Reason: Kero is an abrasive.
Also: try speeding up the tool/workpiece on the finish cut. |
never tryed kerosine , but i ve been spraying varsol on 4140 spot faces and bores to achieve a near perfect finish
if you want a mirror finish on aluminum try eagle-one aluminum wheel polish
the stuff is wicked , just rub it on with a rag