Difference between revisions of "Bench Grinder Introduction"

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m (removed overspecific manual link)
(Safety: turned into table as suggested in #136; made "wet stone grinding" a separate section)
 
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== Safety ==
 
== Safety ==
=== Dangers ===
+
[[PPE|Personal protection]]: [[File:Protection - goggles.svg|50px]] [[File:Protection - gloves.svg|50px]]
* 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 ===
+
(Breathing & hearing protection recommended depending on material and duration of work)
* always wear [[goggles]] to protect your eyes
+
 
* depending on the work you have planned:
+
{| class="wikitable"
** wear a proper [[Dust Mask|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
+
! Dangers !! Precautions
** wear [[Ear Defenders|ear defenders]] if the noise level becomes uncomfortable
+
|-
 +
| generation of hot sparks that are expelled in varying directions ||
 +
* always wear [[goggles]] to protect your eyes  
 +
* make use of the grinder's plastic spark guards, if available
 
* do not attempt to vacuum up sparks! The dust collection bag could catch fire
 
* do not attempt to vacuum up sparks! The dust collection bag could catch fire
* do not attempt to grind aluminum
+
|-
 +
| [[File:Danger_-_heat.svg|left|50px]] the workpiece heats up and stays hot for a while || wear suitable [[gloves]] to prevent burns from sparks or the workpiece when you remove a lot of material
 +
|-
 +
| sparks can fly far and deposit themselves as fine [[dust]], metal dust can be a health hazard when inhaled || wear proper [[Breathing Protection|breathing protection]] if your material is harmful when inhaled
 +
|-
 +
| [[aluminum]] can clog an abrasive wheel and cause it to overheat until it breaks || do not attempt to grind aluminum
 +
|-
 +
| the workpiece can get caught on the wheel and get jerked from your hand ||
 
* let the wheels get to full speed before you start grinding
 
* let the wheels get to full speed before you start grinding
 
* use the tool rests whenever possible
 
* 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
 
* 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.
+
|-
 +
| [[File:Danger_-_sudden_start.svg|left|50px]] no prevention of turning on after loss & restoration of power (''keine Anlaufsicherung'') || if the power has been lost for whatever reason, always press the "off" button before restoring it!
 +
|-
 +
| 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 ===
+
== Wet Stone Grinding ==
 
* Before you start:
 
* 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).
 
** Ensure the water trough is filled properly with ''cold water'' before you start to grind (there is a "MAX WATER LEVEL" sign).
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** Remove the water. The stone is not supposed to be kept wet!
 
** 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.
 
** Disengage the drive system with the knob (turn it counter-clockwise) on the back of the machine.
 +
  
 
[[Category:Introductions]]
 
[[Category:Introductions]]

Latest revision as of 17:21, 12 August 2019

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 (see InfoBoxes).

Safety

Personal protection: Protection - goggles.svg Protection - gloves.svg

(Breathing & hearing protection recommended depending on material and duration of work)

Dangers Precautions
generation of hot sparks that are expelled in varying directions
  • always wear goggles to protect your eyes
  • make use of the grinder's plastic spark guards, if available
  • do not attempt to vacuum up sparks! The dust collection bag could catch fire
Danger - heat.svg
the workpiece heats up and stays hot for a while
wear suitable gloves to prevent burns from sparks or the workpiece when you remove a lot of material
sparks can fly far and deposit themselves as fine dust, metal dust can be a health hazard when inhaled wear proper breathing protection if your material is harmful when inhaled
aluminum can clog an abrasive wheel and cause it to overheat until it breaks do not attempt to grind aluminum
the workpiece can get caught on the wheel and get jerked from your hand
  • let the wheels get to full speed before you start grinding
  • use the tool rests whenever possible
  • do not force your workpiece on the grinding wheels, it will just overheat them and increase the risk of kickback
Danger - sudden start.svg
no prevention of turning on after loss & restoration of power (keine Anlaufsicherung)
if the power has been lost for whatever reason, always press the "off" button before restoring it!
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 front 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.