Wood Lathe Speed Calculator Tool

RPM Formula:

\[ RPM = \frac{60 \times v}{\pi \times D} \]

Revolutions per Minute (RPM):

Definition: This calculator determines the optimal rotational speed (RPM) for a wood lathe based on cutting speed and workpiece diameter.

Purpose: It helps woodworkers select the proper lathe speed to achieve clean cuts while maintaining safety.

The calculator uses the formula:

\[ RPM = \frac{60 \times v}{\pi \times D} \]

Where:

Explanation: The formula converts linear cutting speed to rotational speed based on the workpiece circumference.

Details: Correct RPM prevents vibration, ensures smooth cuts, reduces tool wear, and maintains safety. Larger diameters require slower speeds.

Tips: Enter the desired cutting speed (typically 3-15 m/min for wood) and workpiece diameter. All values must be > 0.

Q1: What's a typical cutting speed for wood?
A: Softwoods: 10-15 m/min, Hardwoods: 5-10 m/min, depending on tool sharpness and desired finish.

Q2: How do I measure workpiece diameter?
A: Measure across the widest part of the workpiece in meters (convert from inches: 1" = 0.0254m).

Q3: Why does diameter affect speed?
A: Larger diameters mean greater surface speed at the same RPM, requiring slower rotation for safety.

Q4: What if my lathe doesn't have exact calculated RPM?
A: Choose the closest lower speed setting for safety.

Q5: Does this work for metal lathes?
A: The formula applies, but cutting speeds differ significantly for metals.