Originally Posted by DAB_Design As a general rule at work, we always use the following to determine feed and speed for taps.... Feed always equals 9.9ipm and RPM is 10 times the pitch. |
So, in my tapping, I will be using 9.9ipm and 280RPMs, right?
Originally Posted by DAB_Design So for a 1/2-13 tap, we would use 9.9ipm and 130RPM. In some instances we will use a dividing/multiplying factor. Sometimes slower for hard metal and faster for soft metal. But make sure you multiply/divide both RPM and feed (for example - 19.8ipm and 260RPM for a 1/2-13 tap, or 4.95ipm and 65RPM for titanium). Dividing is only done when problems with breakage can't be remidied by other means. |
In this case the material is stainless steel. It is not hard as titanium but the chips are very hard to break. What do you think if I use 4.95ipm and 65RPM?
Originally Posted by DAB_Design Make sure to use tapping fluid. Coolant will somtimes work on aluminum, but any hard metal really should use a dedicated tapping fluid. |
I have always used coolant. Its hard for me to change the fluid because it is a big tank and different materials are machined in a same day. I use a sintetic MOBIL coolant. It will work?
Originally Posted by DAB_Design Feed always equals 9.9ipm |
If Im correct ipm means "inch per minute", right?