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Request A ToolBasic Cutting Time Calculator
Estimate time for a known cutting distance at constant programmed feed. Use it for a straight travel calculation or a clearly defined set of passes rather than as a complete machine-cycle prediction. Treat loading, probing, rapid travel and other non-cutting events separately. The calculator can estimate the entered motion, but it cannot reconstruct a complete machining cycle.
Used For
Check cutting distance and constant feed per minute.
Formula
Time in minutes = cutting distance ÷ feed per minute.
Cutting Time Basic
Enter the values you know. The result is calculated in your browser.
Calculation only. Verify toolmaker data, material grade, engagement, machine limits, workholding and actual cutting conditions before production.
Advanced Cutting Time Calculator
Review the additional variables shown in this tool.
Cutting Time
Enter the values you know. The result is calculated in your browser.
Calculation only. Verify toolmaker data, material grade, engagement, machine limits, workholding and actual cutting conditions before production.
Estimate Time For Known Cutting Travel
- Enter cutting distance and constant feed per minute with matching length units.
- Calculate time in minutes and hours.
- In the advanced panel, enter distance and extra travel per pass, then the pass count. The panel divides the resulting total distance by feed.
Formula And Units
Time in minutes = cutting distance ÷ feed per minute.
Illustrative Calculation
At 500 mm/min, 1,000 mm of cutting travel takes 2 minutes. Three identical passes take 6 minutes before non-cutting moves or other cycle events are included.
Keep Distance And Feed In The Same System
Use millimetres with mm/min or inches with in/min. The result is minutes. Divide by 60 for hours. A source value stated in seconds must be converted before use with a per-minute feed.
What This Estimate Leaves Out
Acceleration, corner slowdowns, spindle ramping, tool changes, probing, dwell, loading and rapid moves are not automatically included. Allowance and pass fields extend the distance model; they do not simulate the control.
Check the formula reference or report a result that does not match your calculation.
Calculation Process With Example Values
Illustrative arithmetic only. Select cutting inputs from the applicable tool and material reference.
| Step | Substitution | Result |
|---|---|---|
| Cutting Time | 500 ÷ 1,000 | 0.5 min (30 seconds) |
This Is Cutting Travel Time
The model excludes tool changes, spindle acceleration, rapid positioning, probing and operator handling. It also assumes the entered feed is maintained throughout the specified distance. Use a measured cycle or machine simulation for those additional events, and keep that figure separate from this constant-feed estimate.
Applications And Related Calculation Workflows
CNC And Lathe Cutting Time
For a straight turning pass at constant actual RPM and feed per revolution, calculate linear feed as RPM × feed per revolution, then divide the cutting length by that feed per minute. For example, 1000 RPM at 0.2 mm/rev gives 200 mm/min, so a 100 mm pass takes 0.5 minute before other moves. This lathe cutting time estimate excludes approach, retract, acceleration, tool changes and any speed change along the path.
Feed Travel Time Is Not A Complete Machine Cycle
The calculator divides the entered travel by a constant linear feed. Its advanced mode repeats that arithmetic for passes and additional travel. It does not model acceleration, axis limits, tool changes, spindle acceleration, dwell, probing or a controller’s interpretation of a canned cycle.
Keep Each Stage Visible
A hypothetical 500 mm segment at 1,000 mm/min takes 0.5 minute (30 seconds). If a separately established tool change takes 8 seconds and a dwell takes 2 seconds, those stages bring that subtotal to 40 seconds. Rapid motion and acceleration remain additional quantities, not a hidden allowance inside the feed result.
For drilling, include only the travel your stated model covers. A hole depth alone does not describe approach clearance, breakthrough, peck retracts or the return movement. Use the drilling workspace to check feed units, then inspect the actual cycle definition before a time estimate becomes a production quote.
Autodesk’s machining-time documentation treats feed, rapid and tool-change time as separate components. That is useful context for comparing a CAM estimate with this simpler arithmetic tool. Our result should be read as ideal feed travel time, not a simulation of your machine.
Cutting Time Questions
Is Additional Travel Entered Once Or For Every Pass?
For the advanced panel it is added to the distance per pass, then multiplied by pass count. Enter an allowance that follows that convention.
Can I Estimate A Lathe Pass From Feed Per Revolution?
First multiply actual RPM by feed per revolution to obtain feed per minute, then use the cutting length. A changing spindle speed or diameter can require a more detailed time model.
Help Improve This Resource
Report An Error
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Report An ErrorCNC Feeds & Speeds Editorial Desk
The site brings calculation tools and machining references into one workspace. Use the editorial and site information to understand its purpose and limitations. Send corrections with a reproducible example through the error report form.
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