Drill Pointhelp
Input the tool diameter and the included angle. Output is the length as measured along the axis of the tool, from the tip to the full diameter. The angle input assumes degrees, input radians using '2.44rad'. Diameter assumes decimal inch input, you can also input fractional '1/4' or metric '6.35mm'.
Unit Circlehelp
The unit circle is a simple visualization of cosine and sine. The angle input assumes degrees, input radians using '2.44rad'. The scale input is unitless.
Speed & Feedhelp
Convert between spindle speed (revs/min, rpm) and surface speed (feet/min, sfm). Convert feed between inches/rev (ipr) and inches/minute (ipm). Diameter input is assumed to be decimal inch, optionally enter fractional inch '1/4' or metric '6mm'.
4th Axishelp
Calculate where a point lands after a given rotation is applied. The point's initial location must be known and the location of the axis of rotation must be known.