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Tried to get the harbor freight one with the coupon this morning. They were out and said it was discontinued. Web site says out of stock.

I might try the vertical line thing. Although right now...

Trying to figure out how much air drying power I need. I have a small Roland MDX-540 with the automatic tool changer which needs a compressed air supply. The little $10 inline silica gel option does...

So then I can't run at 12,000 RPM, right? On a .25" mill, each tooth is traveling .785" x 2 teeth x 12,000 RPM = 18,840 (1,570 SFM) which does not fall in the range of 600-1200. That means the max...

Sorry, didn't answer all the questions especially when I am here looking for a diagnosis!

Anyway, no cutting fluid. But I ran all day yesterday with no cutting fluid and no problems. Also, mill is...

Thanks for the input. So what's the rule for aluminum as far as a spindle speed? Max it out as Matt says—that's the best? If i have any cutting troubles does reducing the spindle speed help? Or just...

I have a small CNC mill—Roland MDX-540. According to the specs, the spindle is 400W and operates on 120V. The spindle speed can go up to 12,000 RPM. When doing my rough cutting on 6061, does anyone...

Thanks for the all the replies. You guys are awesome. This is definitely setting me the right direction.

Yeah, sorry. I thought you were telling me how to drill a hole for a 3/8-16 tap! Anyway, I am just confused because it seems odd to me that different thread mills can cut the same 3/8-16 thread and...

Here's two videos of holes that are thread milled:

Thread milling - YouTube

Thread milling up close - YouTube

Thread mill it because I can't tap it. Sorry, I'm a newbie so my terminology is kind of lax and probably wrong in many instances!

The MDX-540 is a small CNC mill. The spindle only goes one direction so I can't use a regular tap like on a drill press with a drill tap rig that reverses the tool out one the hole is tapped. So I...

Thanks, but that's not what I am asking. I am looking to figure out which single profile thread mill will make a 3/8-16 tap.

With the Roland, you can only use the single profile. Do you know which thread mill I would use to make a 3/8-16 hole?

I have a Roland MDX-540 which from talking with Roland the only way to tap holes with it is to use a Single Profile Thread Mill. I want to tap 6061 aluminum. When I go to a site like MSC:

Single...

The manual says to lube it at the two grease fittings but does not indicate how much. Is it a sealed bearing or something that is being lubed? I don't want to blow out a seal or anything. How much...

Any of the models MDX-540, MDX-540A, MDX-540S, MDX-540SA. Let me know if anyone has any leads. Thanks!