![]() from what my machinest tells me, we are doing this right. I am quality guy trying to chase down an answer. It's a pretty stiff/heavy machine relative to a B'port.Hi, first off - I am not a machinest. I'm using a Shizuoka AN-S knee mill w/ 3HP spindle motor. It's all prototype work, so surface finish isn't so critical. Nor do I make many finish passes, the only exception being close tolerance bores. Mostly pockets, drilling and profile cuts.letting the finished part drop through from the stock. Generally speaking, I do not exceed 0.5D axial depth of cut with endmills. Whereas Table 15a recommends 0.003 ipt for <1/2" dia HSS end mills. For example, Table 10 quotes f/s=15/165 optimum and 8/850 avg for end-milling with HSS. However, it is not clear to me how one reconciles the different feeds and speeds quoted for aluminum in Tables 10 versus those in Table 15. ![]() I initial feeds and speeds were obtained using the feed/speed tables in the Machinery's Handbook 26th Edition. Since the machine is not equipped with splash guards, any oil-hydrocarbon based coolant would make a huge mess in my shop. Am using Tullco Premier Poly-Cut water-soluble coolant. I want to thank all of you so much for your kind assistance.įor the most part I'm using 2-flute end mills. Good Luck!!! RE: Feeds and speeds for aluminum milling tgmcg (Mechanical) The shear hog catalog may have some astronomical cutting speed to use but you will not be able to achieve that cutting speed in a bridgeport, and if you could the setup isn't rigid enough anyway. Then ask them for recommended speeds snd feeds BASED ON YOUR CUTTING CONDITIONS AND SETUP. When you buy any of this stuff talk to either the distributer or the factory rep and describe your cutting conditions to them. also has a large line of products that work extremely well in aluminum. I think that Iscar has just come out with mills specifically designed for aluminum. ![]() That being said it is still a heck of a lot more productive than conventional mills. By that I mean that you cant run it at 3000 rpm if you value life and limb. The downside is that the bridgeport doesn't have the rigidity to take full advantage of the tool. The investment you make in the tool will more than pay for itself in time saved when compared to any conventionl face mill. We have used a 3" shear hog face mill on a bridgeport with great sucess. Leonard RE: Feeds and speeds for aluminum milling jbel (Mechanical) 23 Feb 04 07:05 Is there any accounting for the inconsistancy of bossing? Go figure! My current boss doesn't seem to object to the cost so why not? I had a previous boss that was touting the benefits of WD-40 and then when I started using it "consertively" because it isn't cheap, the boss criticised me for using the expensive stuff. I also like Kerosene for cutting Aluminum but am quickly swtching to WD-40 which smells better and seems to work better albiet more costly. Therefore when surfacing a wide swath, the fly cutter can possibly outperform the trick AB Tool unless we have a larger diameter (1.5") as you suggest. I treid it once on the Bridgeport and it works great but B'port can't take advantage of the high rpm which is limited to a little ofver 3,000rpm. I think we have that same tool which we use on our Haas verticl mill and KOMO router for Aluminum. Tom RE: Feeds and speeds for aluminum milling loojian (Mechanical) 22 Feb 04 04:54 I'd be most grateful for any recommendations or comments on how I might reduce my machining time. Can also try carbide tools, but have hesitated doing so since first attempts 2 yrs ago resulted in lot's of broken tools. Seeems logical that an objective should be to remove the most material at powers close to the rated spindle motor power. I have not yet tried using roughing mills for initial stock removal, though this seems an obvious thing to try. These components took quite a while to mill the first time around at the above. Am using an inverter for continuously variable speed control between 50-3600 rpm.Īm contrmplating the need to mill relatively large (for me) components from blocks of materials, say 3" x 6" x 14" blocks. Spindle motor is rated for 3600rpm/3HP w/2-speed gearbox. I'm using the following feeds and speeds for milling alloy 6061 and Fortal (7075) aluminum plate, bar and billets.Ġ.250" dia x 2-flute end mill.15 ipm x 2500 rpmĠ.500" dia x 2 flute end mill.8 ipm x 1250 rpmĮndmills are center-cutting TiCN coated HSS
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