Hi All:Thanks for all the information; yeah Ox, I am concerned about the length to diameter ratio, and may farm this job out to a Swiss guy (there are just enough parts in the run to justify it)Centerless ground stock is also a good idea, but only if I can get some kind of non-marring collet for the machine...standard 5C's will scarf the material up so badly I'll have gained nothing.My main concern (other than the finish) is drilling the hole fast...I've had some issues in the past with T6 piling up on the tool and I'm hoping T3 will be better especially with a through coolant carbide drill.I once had a chunk of mystery aluminum that cut like butter and made really nice small chips but was soft compared to ....is that how T3 cuts?The only thing printed on the bar remnant that I could read was something like "Microcut" or "Micro"Also, what do you guys think of deburring the internal edge of the slots by mounting a wire brush (like a test tube brush set up as if it were a drill) and programming it to run in and out of the hole a couple of times with some side pressure?Have any of you tried something like this? Did it work?CNCBrit, I was hoping to do the job in a single op; running the part complete including deburring from one end, but drilling my hole just deep enough that the cutoff will intersect it.All of the blade is then pushing into solid metal and with luck and fiddling, I hope there's virtually no burr left.That's one of the reasons I'm considering turning the parts from solid rather than buying tubing.I've been successful this way in the past but I'm certainly open to suggestions and criticisms.Production turning is my weakest capability...I just don't do very much of it, so I've never gotten a chance to get good at it.CheersMarcus
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Like most metallic elements, pure aluminum is very soft, and it&#;s not strong enough for most commercial uses. To add strength and improve other qualities, other elements such as iron, silicon, copper, magnesium, manganese, and zinc are added to create aluminum alloys.
The different alloys are numbered to indicate which other elements are added to the aluminum. The first number is between 1 and 7, and other numbers are added (like ) to further classify the different alloys.
Series Aluminum is the most pure of aluminum. This has a 99% minimum aluminum, and has limited uses. It does have great corrosion resistance, and is mainly used for chemical tanks or conductive bus bars.
Aluminum aluminum is mixed with copper and is often used for aircraft and aerospace industries. It has very high machinability, but is missing the corrosion resistant properties that other alloys offer.
Read: What is the best material for aerospace parts? Aluminum vs Titanium vs Stainless Steel
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Aluminum is mixed with manganese and is very formable and heat treatable. This aluminum alloy is often used for cookware and in power plants and vehicles.
Aluminum mixes aluminum with silicon, lowering the melting point. This makes the alloy great for filler material in welding and brazing.
Aluminum is mixed with magnesium and has a high tensile strength and formability. It&#;s commonly used for fabrication projects such as vehicles, tanks, and bridges.
Aluminum is mixed with magnesium and silicone. This alloy has high corrosion resistance and is often used to form structural components like angles, beams, and tubes.
Aluminum is mixed with zinc. This makes a very high strength aluminum which is often used in high performance applications like aircraft, aerospace, and competitive sporting equipment.
The most common aluminum used for CNC machined parts is the , , and series alloys.
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