Disc Grinder Introduction
From CoMakingSpace Wiki
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
- after inserting a new disc, let it run freely for a minute and make sure it runs safe and true
Suggested Reading
Besides these safety notes, you should know about abrasive discs, especially the difference between grinding and cutting discs!
