Bench Grinder Introduction

This is the content required for an introduction to our bench grinder - 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.

Safety

Dangers

• generation of hot sparks that are expelled in varying directions
• sparks can fly far and deposit themselves as fine dust
• the workpiece heats up and stays hot for a while
• has no prevention of turning on after loss & restoration of power (keine Anlaufsicherung)
• metal dust can be a health hazard when inhaled
• aluminum can clog an abrasive wheel and cause it to overheat until it breaks
• the workpiece can get caught on the wheel and get jerked from your hand

Precautions

• always wear goggles to protect your eyes
• depending on the work you have planned:
  • wear a proper dust mask if your material is harmful when inhaled
  • wear suitable gloves to prevent burns from sparks or the workpiece when you remove a lot of material
  • wear ear defenders if the noise level becomes uncomfortable
• do not attempt to vacuum up sparks! The dust collection bag could catch fire
• do not attempt to grind aluminum
• let the wheels get to full speed before you start grinding
• use the tool rests whenever possible
• make use of the grinder's plastic spark guards, if available
• do not force your workpiece on the grinding wheels, it will just overheat them and increase the risk of kickback
• the blades you are sharpening become sharp. Do NOT test the sharpness with your finger or other body parts you want to remain intact.

Wet Stone Grinding

• Before you start:
  • Ensure the water trough is filled properly with cold water before you start to grind (there is a "MAX WATER LEVEL" sign).
  • Tighten the knob on the back of the machine (turn it clockwise until the wheel begins to drive)
• Keep an eye on the water level during grinding. Refill if needed.
• Do NOT grind a blade with the stone being dry.
• When you are done:
  • Remove the water. The stone is not supposed to be kept wet!
  • Disengage the drive system with the knob (turn it counter-clockwise) on the back of the machine.