Bench Grinders: Difference between revisions
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|synonyms=bench top grinder, grinding wheel;<br>DE: Doppelschleifer, "Schleifmaschine" | |synonyms=bench top grinder, grinding wheel;<br>DE: Doppelschleifer, "Schleifmaschine" | ||
|type=power tool | |type=power tool | ||
|access=upon | |access=upon introduction | ||
|location= | |location= | ||
|material=[[metal]] | |material=[[metal]] | ||
| | |tutors=[[User:Lukas|Lukas]] | ||
|similar=[[Disc Grinder|disc grinder]], [[files]] | |similar=[[Disc Grinder|disc grinder]], [[files]] | ||
}} | }} | ||
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== Safety == | == Safety == | ||
As the bench grinder is not only a power tool but one with openly accessible spinning | As the bench grinder is not only a power tool but one with openly accessible spinning parts, precautions need to be made. Have a [[tutor]] show the machine to you before touching it! | ||
* [[Clamps|clamp]] the grinder down tightly as it will vibrate quite a bit | |||
* never wear gloves and/or scarves, roll up long sleeves and tie back long hair so nothing gets caught | |||
* never wear gloves and/or scarves, | |||
* always wear [[Personal Protection|personal protection]], especially safety goggles and if necessary some ear defenders and dust masks | * always wear [[Personal Protection|personal protection]], especially safety goggles and if necessary some ear defenders and dust masks | ||
== Usage == | == Usage == | ||
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* do not force your workpiece onto the wheel as that will produce a lot of heat; cooling your piece from time to time is always a good idea | * do not force your workpiece onto the wheel as that will produce a lot of heat; cooling your piece from time to time is always a good idea | ||
==Sharpening== | == Sharpening == | ||
[[File:Bench_grinder_sharpening.JPG|thumb|230px|sharpening a plane's blade]] | [[File:Bench_grinder_sharpening.JPG|thumb|230px|sharpening a plane's blade]] | ||
* approach the spinning wheel slowly so your workpiece doesn't catch on it! | * approach the spinning wheel slowly so your workpiece doesn't catch on it! | ||
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* check the squareness of the blade often to be able to make corrections | * check the squareness of the blade often to be able to make corrections | ||
* keep in mind that the grinder itself is only for roughing out the blade geometry, for a truly sharp blade you definitely need to work with some [[wetstones]] afterwards | * keep in mind that the grinder itself is only for roughing out the blade geometry, for a truly sharp blade you definitely need to work with some [[wetstones]] afterwards | ||
== Ideas == | |||
For '''really''' sharp knives, we could turn an [[MDF]] wheel on this grinder and use it as the final "grit". | |||
[[Category:Metalworking | [[Category:Metalworking | ||
[[Category:Power Tools]] | [[Category:Power Tools]] | ||
Revision as of 00:48, 21 August 2017
| ToolInfoBox Bench Grinder | |
|---|---|
| |
| Synonyms: | bench top grinder, grinding wheel; DE: Doppelschleifer, "Schleifmaschine" |
| Type: | power tool |
| Material: | metal |
| Access Requirements: | upon introduction |
| Tutors: | Lukas |
| Similar (More or Less): | disc grinder, files |
This "Brüder Mannesmann" bench grinder from 1996 is used but still in decent condition; the wheels run true and quietly. The grinder is equipped with two different stone wheels with different grits (35 & 60); one for heavy-duty and quick material removal, one for a finer and more precise material removal that will also leave a way nicer surface finish.
Safety
As the bench grinder is not only a power tool but one with openly accessible spinning parts, precautions need to be made. Have a tutor show the machine to you before touching it!
- clamp the grinder down tightly as it will vibrate quite a bit
- never wear gloves and/or scarves, roll up long sleeves and tie back long hair so nothing gets caught
- always wear personal protection, especially safety goggles and if necessary some ear defenders and dust masks
Usage
- after plugging the grinder in, turn it on and wait until it reaches its final speed
- if you hear any rattling or other funny noises turn it off immediately and check whether something is loose or whether tiny parts are inside of the casing
- grind whatever you want to grind by holding it against the stone wheel; make sure the piece is supported either by the little table in front of the wheel or some other structure
- do not force your workpiece onto the wheel as that will produce a lot of heat; cooling your piece from time to time is always a good idea
Sharpening
File:Bench grinder sharpening.JPG
sharpening a plane's blade
- approach the spinning wheel slowly so your workpiece doesn't catch on it!
- when sharpening hardened steel make sure to keep the blade cool, otherwise previous hardening may be undone
- it's a good idea to press the blade firmly against the upper support (check the image) to keep a consistent blade alignment
- check the squareness of the blade often to be able to make corrections
- keep in mind that the grinder itself is only for roughing out the blade geometry, for a truly sharp blade you definitely need to work with some wetstones afterwards
Ideas
For really sharp knives, we could turn an MDF wheel on this grinder and use it as the final "grit".
[[Category:Metalworking
