Viesturs, Am 16.02.2013 16:32, schrieb Viesturs La-cis: /snip... oversized for aluminum. > Do You mean oversized in terms of diameter? I am going for 1 kW Kress > spindle, it will handle that. No, I meant hardness. Diameter depends purely on your needs. Only in the case you mill anodized aluminum, with surface hardness of carborundum, carbide is advised to keep tool wear down. Look up cutting speed in your handbooks, you will be surprised! > In university I found out that better than pure tap water would be > mixing the water with soda (Na2CO3).
Making the fluid basic (pH over 7) is mainly to prevent corrosion of the machine. The soda has little influence on cutting. I dry my mill every time after use, so I have no worry. Water is a good coolant, and especially useful in the case of aluminum (AFAIK, not yet completely understood) because it reacts with alu in the very instant of cutting, yielding a microscopic aluminum oxide skin on the chip's surface, thus preventing their sticking (micro-welding) to the tool and among one another. Oil is good to reduce friction when working in steel. > Yes, I know about the need of coolant. As I already have been adviced > before, mist coolant spray is recommended for aluminium, but this time > my budget is very very tight. Besides, flooding flushes the chips away effectively, and at 20 000 turns per minute you get a lot of chips! Thank You, their pricing seems much better! I have bought a set of 9 collets plus nut from them last year under EUR 100. Best regards Peter ------------------------------------------------------------------------------ The Go Parallel Website, sponsored by Intel - in partnership with Geeknet, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials, tech docs, whitepapers, evaluation guides, and opinion stories. Check out the most recent posts - join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
