Shop Aides
Tools to assist those that work with CNC Machines, their supporting equipment, and organizations.
True Position CalculatorTrue Position Calculator
    This calculator is for determining the 2D circular amount of True Position tolerance that has been used. It will also analyze the position tolerance used relative to the allowable position tolerance according to the principles of the ASME Y14.5M-1994, Geometric Dimensioning and Tolerancing (GD&T) guidelines.

Shaft Keyway Depth Calculator
    This calculator is for determining the total depth from the outside of a shaft to the bottom of a keyway. Once this is known, the cutter can be fed down to the required depth without taking any measurements other than that indicated by the graduations or scale on the machine.

Bolt Circle Calculator
    This calculator is for determining the X/Y coordinates relative to the center of a circle. These coordinates can then be used to drill holes, etc, around a radius.

Cutting Speeds and Feeds CalculatorsSpeeds and Feeds
    Now there are three Inch & Metric Speeds and Feeds calculators on one page. They calculate RPM, Feed Rate, and Feed. RPM is calculated for different material shapes including round for drills and cutters. Feed and Feed Rate can be calculated in either per Revolution or per Tooth.

Inch & Metric Tap Drill Sizes & Decimal Equivalent Table
    Chart of drill sizes for inch and metric taps. Includes the decimal equivelant for both drill sizes.

Torque SpecsTorque Specs
    The new Torque Specs section has Metric Bolt Torque Tables, Inch Bolt Torque Tables, Torque Conversion tools, Torque Wrench tools, Torque Calculators, and other torque related Technical Aides.

Three-phase Voltage Unbalance Description and Calculator
    Calculates the voltage unbalance of three-phase electricity as defined by NEMA. Also a short article on the problem of three-phase voltage unbalance.


Trig. Calculators:
Right-angled Triangle Calculator

Trigonometric Functions Calculator
    This calculator converts decimal degrees to the values of the natural functions sine, cosine, tangent, cotangent, secant, cosecant, hyperbolic sine, hyperbolic cosine, hyperbolic tangent, involute, sevolute, plus radians.