Glossary & Reference
On a lathe, the turret is what makes rapid, unattended tool changes possible — a rotating, multi-station tool holder that swaps the active cutting tool in a couple of seconds instead of a couple of minutes.
A turret is a rotating, indexable tool-holding mechanism that carries several tools at once in fixed stations arranged around its face or circumference. To change tools, the machine simply retracts the current tool, indexes (rotates) the turret until the next required tool station lines up with the working position, then advances back into the cut — no manual swap required.
This is the entire point of a turret: eliminating the minutes-long manual tool change and replacing it with an indexing motion that takes seconds. On a part that touches eight or ten tools per cycle, that difference compounds fast across a production run. See our Cycle Time page — tool-change time is one of the biggest levers you have for cutting non-cutting time out of a cycle.
Modern CNC turning centers typically use a single indexing turret — a disc or drum with roughly 8 to 12+ tool stations, indexing in either direction to reach the nearest station by the shortest path. Many of these turrets also carry live (driven) rotating tools alongside static turning tools, letting the machine mill, drill, or tap off the lathe spindle without a second setup.
Older manual and semi-automatic machines use a different layout: a fixed hexagonal turret mounted on the lathe's ram, holding up to six tools in a preset sequence. The operator advances the ram, the turret indexes one position with each retraction, and the next tool in the sequence comes up automatically — built for running the same repetitive part over and over without resetting tools between cycles.
Turret indexing is driven mechanically, hydraulically, or by a servo motor depending on the machine. Servo-driven turrets are the most common on modern CNC lathes because they offer the fastest, most precise indexing and can rotate in either direction to reach the next station by the shortest path, shaving fractions of a second off every tool change.