Back to GSM Code List

G50: Lathe RPM limiter

Limits the maximum spindle speed, especially important when using G96 constant surface speed.

For reference only: syntax changes with the control, the post-processor and the machine parameters. Check the official manual and run a simulation before cutting. Legal notice.

Family
Lathe
Machine
Turning, Mill-turn
Risk
High
Example
G50 S2500
E.g.:
G50 S2500

Parameters

S
Límite máximo de rpm cuando trabajas con G96 (velocidad constante). · rpmImprescindible antes de refrentar a centro con G96.
X Z
En controles antiguos, preset: valor que toma la posición actual (como G92). · mm

Machine: Turning, Mill-turnRisk: High

Fanuc · Haas

G50 S...
  • Fanuc: It must be programmed before or together with G96 to avoid excessive RPM.
  • Haas: Critical on large parts or delicate clamping.

Other codes in Lathe

M17/M18 Turret indexingM21/M22 Tailstock advance/retractM23/M24 Threaded chamfer exitM35/M36/M37 Parts catcherG7/G8 Diameter/radius mode around latheM25-M29 Bar feeder, parts catcher and lathe auxiliariesM31/M32 Chuck bypass / lathe auxiliaryM53-M56 Steady rest and tailstock clamp/unclamp
See the full list of G and M codes

Frequently Asked Questions (FAQ)

What does G50 mean in a CNC program?

Limits the maximum spindle speed, especially important when using G96 constant surface speed. In the catalogue it appears as "Lathe RPM limiter", within the Lathe family.

How is G50 written on each control?

Fanuc: G50 S... · Haas: G50 S.... The exact syntax depends on the control version and the machine parameters: always confirm with the manufacturer's manual.

Can you give me an example of G50?

G50 S2500 — Limits the maximum spindle speed, especially important when using G96 constant surface speed.

Which machines use G50?

G50 is used in: Turning, Mill-turn.

What should you watch out for with G50?

High risk: a mistake here can cause a crash, a broken tool or an out-of-tolerance part. Simulate the program and dry-run it before cutting.

Related tools

CNC G-code Simulator

CNC IDE: editing with G/M tooltips, line inspector, conversion between controls and 2D/3D toolpath.

CNC Alarms Guide

CNC Alarms and Solutions Guide. Enter the error code or symptom to find the cause and how to repair it at the machine.

Calculate cycle time

Estimate CNC turning and milling cycle time from G-code. Calculate parts per hour with a breakdown of cutting, rapids, canned cycles and tool changes.