[SSI]

I am new to this site....I am tapping through aluminum. I am tapping a 2.5mm hole using an M3x.5mm tap. I have the speed at 200 and the feed at 6.2. What would the correct speed and feed be? Thanks

[underthetire]

6K rpm on a brother or robodrill. 1 rpm on a bridgeport. Anywhere in between with other machines.

Point of all this-more details.

[SSI]

im using a daewoo 3016L

[Andre' B]

You can spin it faster, at some point your control may not be able to keep the spindle and Z axis in sync and you will start getting bad threads. The only way to find out is to try it.

If you feed a tap at anything other the lead of the thread and you will not get the threads you are expecting.(nuts)

[muddobber76]

Let's start by giving us some more data:

Is this machine a lathe or mill or mill/turn?

Do you have ridgid tap function?

Is it a thru-hole or blind hole?

What type of tap are you using; carbide,HSS,spiral,bott,etc?

How many holes per part?

How many parts total?

Tapping is one of those processes that you must weigh all variables in order to achieve desirable results. Proper set-up is absolutely critical if you are tapping a production run.

[timlkallam]

At 200 rpm your feed would be 3.937 ipm