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A 3/8” end mill, 7/8” length of cut, running 250ipm at .020” stepover at 10k rpm.
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I've been pretty happy running 123 ipm at 6700 rpm with 7/8 doc and .0375 stepover, but wouldn't complain at faster if the tools hold up. What tools are you using?
3/8” end mills I removed over 28-pounds from the block. A 3/8” end mill, 7/8” length of cut, running 250ipm at .020” stepover at 10k rpm.
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I've been pretty happy running 123 ipm at 6700 rpm with 7/8 doc and .0375 stepover, but wouldn't complain at faster if the tools hold up. What tools are you using?
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I am getting about 40hrs from a 3/8" SGS S-carb at much more conservative parameters. (14k, 190ipm, .880axial, .050radial)
Wheelie are you asking about the aluminum milling or steel? The numbers you quoted are for steel. For aluminum I'm using a Helical 35-degree chipbreaking rougher in a Lyndex sidelock that's kind of long. Just got some more Maritool stubbies in to swap it over. 3/8" tool cutting 1" deep, 350ipm at .08" stepover and 10K rpm. I haven't found the failure point yet, I just kept going up and stopped at 350ipm. Once I swap the tools to the stubby sidelock I'll see if we can do more! It's fun being able to push this thing with only a 10k spindle.
P.S. I ran production on 7075 parts this week with Helical's 40-degree finisher with the wiper flat grind in a hydraulic holder, and the floor finish is amazing. The bright dip etch for anodize completely removed tooling marks and all that's there is the material grain. Loving the Helical stuff.
P.S. I ran production on 7075 parts this week with Helical's 40-degree finisher with the wiper flat grind in a hydraulic holder, and the floor finish is amazing. The bright dip etch for anodize completely removed tooling marks and all that's there is the material grain. Loving the Helical stuff.
Tell me more as well!
I am getting about 40hrs from a 3/8" SGS S-carb at much more conservative parameters. (14k, 190ipm, .880axial, .050radial)
Can I ask you how you measure the 40 hours? A whole week and one shift per day?
Helical's 45 degree finishers with the wiper flats and a little corner radius does amazing things for floor finishes.
I'm considering buying a Brother Speedio S300X1 for small light prototype work. It just barely fits into the space I have available. Any feedback good or bad regarding this machine? Limitations? Concerns?
I know you were looking at the Haas CM-1 as well. That machine seems like all of Haas' worst ideas crammed into one overpriced package. 20-taper toolholding so small the pull stud is integrated into the holder; Weak motors; Fragile high speed spindle (Haas has a reputation regarding their high speed spindles). I think chopping a hole in a wall, buying an S500 and adding a rotary to it is going to come in around the same price as that CM-1 you were spec'ing out.
Why not knock out a wall? S500X1 will be a lot less cramped. Can your floor hold 6k?
Might check this one out: TRAK 2op Vertical Machining Center
I'd think it'd have to be considerably less expensive than a Speedio to consider. I have an S500 and it's great.
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