Resources

Basics of Balancing: Static, Couple and Dynamic Unbalance

The four foundational terms, the three types of unbalance with their formulas, units, and why force rises with the square of speed.

Balancing Theory: Inertia, Centrifugal Force and Unbalance Types

Mass moment of inertia, couples and bearing reactions, metric versus imperial formulations, and the four unbalance types including quasi-static.

Specifying Unbalance and Where to Put the Tolerance Planes

Why tolerance planes belong at the bearings, and what the same number permits when they are moved inboard.

Balancing with an Offset Mass Center

Three cases of bearing reaction, including when single-plane correction leaves the assembly worse than before.

Axle Balancing: Guidelines and Fundamental Considerations

Where axle unbalance originates, three ways to write the specification, single-plane correction strategy, end weight and clutched assemblies.

The Benefits of Automated Armature Balancing

Angular error arithmetic, correction by feel, and why tightening armature tolerances outrun a manual process.

Unbalance Tolerance in Vector Space

Unbalance has direction as well as magnitude, so its tolerance is an area. Four specification styles and the zone each describes.

GD&T Symbols: The 14 Geometric Tolerancing Controls

All fourteen controls by category, and how datum errors become unbalance on a balancing machine.