Speeds and feedsformula

WARNING: All cutting tools can shatter and break during use. Government regulations require that safety glasses be worn during use. We also recommend wearing a simple respiration mask.

Speeds and Feedschart

Spot facing: Spot facing is the operation of smoothing and squaring the surface around and at the end of a hole so as to provide a smooth seat for a nut or for the head of a cap screw. Spot facing is generally done on castings and forgings.

Millingspeeds and feedsChart

As the degree of taper increases, you may have to use the large diameter provided to calculate the appropriate RPM, instead of tip size. This usually isn’t necessary until seven degrees. At that time, the tip size would be used to calculate the needed feed per tooth. Tapered end mill usage can be tricky if the proper settings are not adhered to. Please follow these endmill usage charts as closely as possible.

1. SFM + FPT (For Material) 2. Find RPM at intersection of SFM + Diameter 3. Calculate Feed IPM = FPT x Number of Flutes X RPM

The following tables are starting parameters only. Every application is different and may require varying feeds and speeds from this chart.