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I too use WD 40 for aluminium, works well, so well in fact I bought a gallon of it and a spray bottle.

Kerosene works great for cutting aluminum, and it is cheaper than WD40, even when you buy it in bulk. ________________________________ Sent: Tuesday, September 3, 2024 12:10 PM To: Keith S. Angus

Years ago, maybe here or one of the other groups, someone recommended using WD-40 as a coolant/lube when cutting Aluminum. I have done so ever since because I have found that I seem to have fewer

Keith, The formula for calculating cutting speed is four times cutting speed divided by the diameter. This has served me for over 50 years and never fails. I learned it in trade school. Dick --

If you are cutting hard brass then you can make cutters from silver steel (drill rod) and you don't need to harden them. If you do harden them and they get hot they will blunt, but you can let down

What diameter Peter? I was able to cut a .750 x 32 tpi both external and internal on the SL with the threading attachment. Best Regards John

I totally agree. Those are commercial speeds for something like a HAAS with massive flood coolant and a high speed spindle. But it’s a starting point. John Sent: September 2, 2024 4:54 AM To: John

Hi Carl, I only used the 4 flute because Keith stated he used that. The calculator is Machinist Toolbox. https://www.machinist-toolbox.com/ It tends to go for the absolute maximum surface speed which

Hello Nate, it’s connected really to my other thread for recommendations for stepper motors, controllers etc. I would like to make some brass flanges and adapters for large format shutters and

Hello Peter, What is your intended use for this auxiliary spindle? Web search engines are barely useful even if you know very specific / definitive key words. Are you familiar with the Special

That's why I bought 2, 3 & 4 flute cutters in each size, but I found no problem with 4 flutes. I don't know what alloy I was cutting. Some of it started out as die-cast plates for small mechanisms,

Interesting to see the theoretical figures. I notice the power requirement is about 160 W, but the feed rate is almost 3 metres per minute, 50 mm per second. Since the lead screw is 1 mm pitch that

Hi Keith and John: In your chart I noticed you call for a four flute cutter. In my experience four flute cutters tend to pick up aluminum chips and weld them to the cutter, often with spray coolant.

Hi Keith, You’re good on the depth of cut at the max based on Machinist tool box. I reduced the Surface speed down to 155 SFM to get the 5000 RPM you were using. The max depth of cut is 0.04724”

I have never bothered much with cutting speed and depth analysis.? I put in an end mill, take a very light cut, and progess from there. I am unsure about trying to mill with a pointed burr.? To cut

I was only doing about 100 mm per minute, I would guess, and taking out about 1 mm. I also had 3 and 2 flute cutters, in case the metal tended to clog the 4 flute, but I've never used them. The whole

Having been inspired by this discussion, here is a Proxxon mill that I have from a collection.? It is unused.? I took it out of the box and assembled it.? For shipping it gets disassembled and back

What’s a normal cutting rate at 5000 RPM with a 3mm 4 flute cutter? What depth of cut per pass? Sent: September 1, 2024 2:10 PM To: [email protected] Subject: Re: [Unimat] 795, 895 (etc) DC motors

Anyway, putting all that aside, the motor in my little Proxxon MF70 mill is quite compact and claims to be 100 W. Working speed is given as 5000 to 20000 rpm, and in the mill it works with small

I know what it is because I fitted it when I removed the original three phase motor. I know what the chuck is because the original was so battered I fitted a new one. It does everything I ask it to,