MachiningCalc / Reamer Speeds & Feeds Calculator

Reaming · hole finishing

Reamer Speeds & Feeds Calculator

Calculate spindle RPM and linear feed for reaming when you already know the appropriate cutting speed and feed per revolution.

No signupInstant resultsFormula shown

Calculator

Enter your known cutting data. Results update automatically.

Spindle speed—
Feed rate—
Surface speed—
Feed / rev—

Use manufacturer cutting data and stay within machine, tool and workholding limits.

Calculation check: Reaming output is a direct RPM/IPM conversion from your chosen SFM and IPR; it does not invent a cutting recommendation.
Browser basedNo account required
US unitsInches, SFM, RPM, IPM
TransparentFormula and assumptions shown
Connected workflowLinks to the next calculation

Calculation method

How this calculator works

RPM = SFM × 12 ÷ (π × Reamer Diameter)IPM = RPM × Feed per Revolution

Values are deterministic outputs from the inputs shown above; cutting recommendations are not inferred.

Reamer speed and feed calculation

Reaming is a finishing operation, so the correct cutting data depends strongly on reamer type, allowance, material and coolant. This tool performs the RPM/IPM conversion only.

Do not reuse drilling values blindly

A reamer is not simply another drill. Use reaming-specific manufacturer data for the actual tool before entering SFM and IPR.

Technical references