This article provides an overview of electric resistance welding (ERW). It dicusses high-frequency ERW (contact and induction) and rotary wheel contact welding (AC, DC, and square wave). It describes the differences among the processes, as well as the power supplies and weld rolls.

This article discusses several aspects of rotary draw tube bending, including machine specifications; tooling and lubrication; tube material; and machine controls. It discusses advantages and disadvantages of single-level and multilevel machines; selecting lubricants and coatings to reduce tool wear; consistency of tube dimensions and the material's characteristics; and how machine controls are programmed or manually set by the operator.

This article discusses the components that make up a modern abrasive cutting machine. Many of the design considerations are based on the characteristics of the cutting wheel. The author also discusses feeding systems, vises, ejection systems, and the electronics and software that control the machine. Also included is some safety information.