CNC Machining Cycle Time Estimator
Estimate CNC machining cycle time from tool path length, feed rate, number of tool changes, and setup time to calculate parts-per-hour throughput.
Results
What is it?
CNC cycle time is the total time required to machine one part, including actual cutting time, tool changes, and part loading/setup. Accurate cycle time estimation is essential for quoting, scheduling, and capacity planning in job shops and production machining.
How to use
Enter the total programmed tool path length (from your CAM software), the average feed rate, the number of tool changes in the program, the machine's tool change time (from the spec sheet), and the per-part setup time (fixturing, loading, inspection). The calculator outputs cycle time and parts-per-hour.
Example scenario
A milling operation with 500mm tool path at 1,000 mm/min feed = 0.5 min cutting. 3 tool changes at 8 sec each = 0.4 min. 5 min setup. Total cycle = 5.9 min ? ~10.2 parts/hr. To hit 15 parts/hr, setup must be reduced to under 2 min (SMED techniques).
Pro tip
Setup time dominates at low volumes � reduce it with quick-change tooling, tombstone fixtures, and offline tool presetting. At high volumes, feed rate and rapid traverse speed dominate. Use CAM software spindle time reports for accurate tool path lengths rather than estimating.