Lathe revolutions per minute calculator

Calculate the spindle speed (RPM) of a lathe based on spindle speed and gear ratio

Input Parameters

Calculation Results

Calculation Formula

RPM = Spindle Speed × Gear Ratio

Where:
RPM is the resulting revolutions per minute
Spindle Speed is the original spindle speed in RPM
Gear Ratio is the gear ratio of the lathe

Lathe revolutions per minute calculator Calculator Usage Guide

Learn how to use the Lathe revolutions per minute calculator and its working principles

How to Use the Calculator

  1. Enter the Spindle Speed in RPM. This is the speed at which the spindle of your lathe is currently rotating.
  2. Enter the Gear Ratio. This is the ratio of the input gear to the output gear in your lathe's transmission system.
  3. Click the Calculate button to compute the resulting RPM based on the formula RPM = Spindle Speed × Gear Ratio.
  4. The calculated RPM will be displayed in the result field.

Working Principle

The RPM of a lathe's spindle can be calculated by multiplying the spindle speed by the gear ratio. The gear ratio determines how much the input speed is increased or decreased when it is transferred to the spindle. This calculation helps in understanding the actual speed at which the lathe is operating, which is crucial for various machining operations.

Example

If your lathe has a spindle speed of 1500 RPM and a gear ratio of 2.5, the calculated RPM would be:

1500 RPM × 2.5 = 3750 RPM

Applications

This calculator is useful for machinists and lathe operators who need to adjust the spindle speed for different materials and cutting tools. Proper spindle speed is essential for achieving optimal cutting performance and surface finish.