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Machining & entered motion arithmetic

Turning Machining Time Calculator

Time repeated identical turning passes from entered constant RPM, feed and travel allowances.

174 / TURNING MACHINING TIME

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Starting values are illustrative. Use your own costs, rates and assumptions.

INPUT GROUP 01

Entered assumptions and matching units

Check the assumptions before acting on a result.

Read the method and example

YOUR CALCULATION

Time repeated turning passes from entered feed and spindle speed.

Axial feed (mm/min)

200

Batch ideal cutting minutes

10.5

Cutting plus entered handling minutes

15.5

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Saving is optional and stays on this device. Unsaved edits are not kept when you leave. CSV includes every input and the current results.

Illustrative inputs loaded. Replace them with your own assumptions.

How the turning machining time calculator works

Axial feed is feed per revolution times spindle RPM. One piece uses (cut length plus approach) times pass count divided by that feed. Multiply by pieces for ideal cutting minutes.

Add one independent handling allowance per piece. Every pass has identical feed, speed and travel allowance; noncutting returns, acceleration, inspection and tool changes are excluded unless included in handling.

No safe RPM, feed, depth, tool, tolerance or machine capability is recommended. Use procedure values supplied by qualified personnel. Zero pieces produces zero batch time.

Worked example

A 100-mm cut plus 5-mm approach at 0.2 mm/rev and 1,000 RPM takes 0.525 minutes per pass. Two passes on 10 pieces take 10.5 cutting minutes; 0.5 handling minute/piece gives 15.5 minutes total. At 2,000 RPM total is 10.25 minutes.

Sources and assumptions

The source material explains the underlying calculation or pricing structure. Entered prices, costs, schedules and scenario choices are your assumptions; this tool does not obtain supplier quotes or predict actual results.

  • Machining Batch Cost

    Spread setup and whole expected-start costs over a required good-part batch.

  • Machining Power & Torque

    Ideal cutting kW = removal rate in cm³/min × specific cutting force in N/mm² ÷ 60,000.

  • Turning Material Removal Rate

    For the stated turning relation, material removal in cm³/min is surface speed in m/min × depth of cut in mm × feed in mm/revolution.

  • Milling Feed Rate & Travel Time

    Multiply entered RPM, effective teeth and chip load, then estimate ideal feed-travel time for a defined path and number of passes.

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