Piloted Spindle tapping is used for threading a drilled hole manually at one machine location, without moving the workpiece. During tapping operations, the spindle of the drill press serves as a support for the guide post of this tool. It may also be utilized to raise or lower the tap or to hold it in a lifted position while the work is shifted and centered. Better than a hand-held tap wrench, this tapper does not need separate stands, guides or similar devices - the tap follows the correct lead, assuring true alignment.
Pilots are used on atmospheric burners and are available for various types of gases. It can be provided with pet cock and mounting bracket, or with thermocouple or with spark electrode. These are available in many different types and styles.