Disc Grinder Introduction

This is the content required for an introduction to our disc grinders - reading this does NOT replace the mandatory session with a tutor! It will make it a lot quicker though ;-)

Let's begin! First off, make sure you have read the machine's manual, if available (should be linked from its InfoBox).

Safety

Dangers

• generation of hot sparks that are expelled in varying directions
• sparks fly very far and deposit themselves as fine dust
• the workpiece heats up and stays hot for a while
• the Kingcraft grinder has no prevention of turning on after loss & restoration of power (keine Anlaufsicherung)
• the disc can get stuck if it is shifted while deep in a cut
• metal dust can be a health hazard when inhaled
• aluminum can clog an abrasive disc and cause it to overheat until it breaks
• a disc that is off-center or loose is very dangerous

Precautions

• wear goggles AND a face shield to protect your eyes
• wear ear defenders
• wear a proper dust mask when working with a grinder
• coordinate your activity with others in the area
• understand the spark direction, which will always be tangential to the point of the disc that is in contact with the workpiece
• wear suitable gloves to prevent burns from sparks or the workpiece
• put the workpiece in a vise or clamp it down during grinding
• if the power has been lost for whatever reason, always return the power button to the "off" position before restoring it!
• be prepared for kickback
• do not attempt to vacuum up sparks! The dust collection bag could catch fire
• do NOT use abrasive discs on aluminum

Suggested Reading

Besides these safety notes, you should know about abrasive discs, especially the difference between grinding and cutting discs!