CNC Parts Dept — Glossary of Terms

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Also called Rail. A precision linear metal bar that the linear guides can slide on to create smooth, straight motion.

Also called Inverter or Variable Frequency Drive.� Electronic equipment that allows an electric motor to be run at varying rotational speeds.
VFDs are frequently used to start large three-phase AC synchronous spindle motors.

Variable Frequency Drive

Also called Inverter or VFD.� Electronic equipment that allows an electric motor to be run at varying rotational speeds. VFDs are frequently used to start large three-phase AC synchronous spindle motors.

Toolholder

A device that holds a cutting tool, which clamps pneumatically into the spindle motor.� Can be ISO 30, ISO 40, or HSK.

Tool Length Sensor

This length measurement sensor enables automatic tool length measuring. After a tool-change, the workpiece zero-point at the Z-axis will be calculated automatically again.

Tool Clip

A horseshoe shaped device mounted to the machine for holding onto a toolholder that is not currently in use by an automatic tool changing spindle motor.

Timing Belt

Also called Synchronous Drive Belt.� A rubber/kevlar band with teeth used to transfer motion from one pulley to another.� Standard widths, lengths, and tooth sizes exist.

Teach Pendant

Also called Remote.� A handheld box that is connected to the controller, usually by a cord which allows for the control of one axis at a time, or for teaching the machine location into an NC program.

Synchronous Drive Belt

Also called Timing Belt. A rubber/kevlar band with teeth used to transfer motion from one pulley to another.� Standard widths, lengths, and tooth sizes exist.

Spindle Motor

A motor which holds a cutting tool.

Check the CNCPD website for cnc router spindle sales information.

Spanner Wrench

A specially shaped wrench used with a standard crescent wrench for loosening and tightening the cover nut on a manual tool change spindle or toolholder.

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VFD