Metal Lathe Safety

Key Hazards

• Clothing, gloves, hair, jewelry, or rags caught in rotating parts
• Workpieces, chuck jaws, tools, or chuck keys being thrown
• Long stock extending from the spindle and whipping
• Sharp, hot, or continuous chips cutting or entangling workers
• Hands placed near rotating chucks, workpieces, or lead screws
• Measuring, filing, polishing, or adjusting while the lathe is moving

2–3 Minute Talk Script

A metal lathe rotates the workpiece toward the cutting tool. The exposed chuck, stock, spindle, lead screw, and workpiece can create severe entanglement and impact hazards.

Loose clothing, sleeves, gloves, jewelry, long hair, lanyards, and cleaning rags should be controlled before operation. Gloves should not be worn where they can contact rotating components.

The workpiece, chuck, collet, faceplate, centers, tooling, and tool post should be correctly selected and secured. A chuck key or setup tool left in place can become a dangerous projectile when the spindle starts.

Stock extending through the spindle should be guarded or otherwise controlled so it cannot whip or strike someone. Bent, unsupported, or excessive overhang can become unstable as speed increases.

Speed, feed, depth of cut, and tool position should be appropriate for the material and setup. The operator should rotate the spindle by hand when appropriate during setup to verify clearance before applying power.

Chips should be removed only after motion has stopped or by an approved method that keeps hands away from the work. Long stringy chips can wrap around the part or tool and should never be pulled by hand.

Measurements, adjustments, cleaning, filing, polishing, or sanding should be performed only by approved methods. Workers should not wrap abrasive cloth around a rotating part or reach over a moving chuck.

When the lathe vibrates, a workpiece shifts, a tool begins to chatter, guarding is missing, or a component is damaged, operation should stop until the setup and machine condition are corrected.

Safety Reminders

• Control hair, clothing, jewelry, gloves, and loose items.
• Remove the chuck key and all setup tools before starting.
• Secure and support the workpiece and any projecting stock.
• Use a suitable speed, feed, tool, and depth of cut.
• Keep hands away from rotating chucks and workpieces.
• Remove chips with approved tools and methods.
• Stop the lathe before measuring, adjusting, or cleaning.

Ask the Crew

• Is the workpiece secured and supported for the selected speed?
• Has the chuck key and every setup tool been removed?
• Could clothing, hair, gloves, or a rag contact rotating parts?
• How will long stock and sharp chips be controlled?
• Does any measurement, adjustment, or cleanup require full shutdown?