Bench Grinders: Difference between revisions

Latest revision as of 11:21, 26 October 2022

MachineInfoBox Bench Grinders

Synonyms:	bench top grinders, grinding wheels; DE: "Schleifmaschinen"
Material:	metal (not aluminum)
Access Requirements:	Bench Grinder Introduction
Tutors:	Lukas Pakue Johannes Luzian Utis Sebastian
Similar (More or Less):	disc grinder, files, sandpaper

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!

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 a dust mask

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

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 support 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

Triton TWSS10

MachineInfoBox Triton TWSS10

Synonyms:	wet grinder, whetstone sharpener, dual-purpose wet grinder/stropping wheel; DE: Nassschleifmaschine
Type:	Bench Grinders
Material:	metal (not aluminum)
Location:	Grinding Table
Access Requirements:	Bench Grinder Introduction
Status:	Working
Manual:	Instruction Manual Explosion Diagram Product Sheet
Tutors:	Lukas Pakue Johannes Luzian Utis Sebastian
Similar (More or Less):	disc grinder, files, sandpaper

The Triton TWSS10 provides a stone for wet grinding and a leather stropping wheel. Please ensure you always empty the water and loosen the torque screw when you are done!

This grinder is slow moving and intended for the final sharpening passes, not gor quick material removal. It has a 220 grit "diamond wheel" (with a water bath) and a leather honing wheel. It may be nice to add a swiveling base under it so you don't need to pick up the machine to switch directions!

There are quite a few accessories available from the manufacturer. You can find them in the manual (page 8) as well as on the product page.

We should document individual accessories as we get (or 3D print) them.

Straight Edge Jig

We have a straight edge jig for flat irons like bevel edge chisels or plane blades.

NU-POWER MABG 006AMA

MachineInfoBox NU-POWER MABG 006AMA

Synonyms:	bench top grinder, grinding wheel; DE: Doppelschleifer, Schleifbock, Trockenschleifmaschine
Type:	Bench Grinders
Material:	metal (not aluminum)
Location:	Grinding Table
Access Requirements:	Bench Grinder Introduction
Status:	Working
Tutors:	Lukas Pakue Johannes Luzian Utis Sebastian
Similar (More or Less):	disc grinder, files, sandpaper

We got this old bench grinder used but still in good condition; the wheels run true and quietly. The grinder is equipped with two different stone wheels with different grits; one for heavy-duty and quick material removal, one for a finer and more precise material removal that will leave a way nicer surface finish.

Take care: there is no prevention of turning on after loss & restoration of power (keine Anlaufsicherung)! Besides, the motor takes quite a long time to run down after it was turned off.

Specs

wheel diameter: 6" (approx. 15 cm)
motor: 1/2 hp
speed: 2950 rpm
serial number: 898853

Maintenance

The wheels need to be "dressed" from time to time in order to produce nice straight edges and maintain stability. There is a T-shaped diamond file for this on the grinding table.

Apparently, it's also possible to dress a stone with nothing more than a few spring washers on a piece of threaded rod!^[1]

Changing Wheels

After installing a new grinding wheel, set up a safety perimeter (let's say everyone leaves the room) and let the grinder run for five minutes. Only if that went well, without suspicious noises or visible signs of problems, should the grinder be used again.

@@ Line 1: / Line 1: @@
 {{MachineInfoBox
 |machine name=Bench Grinders
+|german=Doppelschleifer
 |image=<!-- GIF or "action photo" could be nice here -->
 |extrabox=yes (= not used in SMW gallery)
-|synonyms=''bench top grinders, grinding wheels;<br>DE: Schleifmaschinen''
+|synonyms=''bench top grinders, grinding wheels;<br>DE: "Schleifmaschinen"''
-|type=power [[sharpening]] tool
+|location=[[Location::Grinding Table]]
-|access=[[Bench Grinder Introduction|bench grinder introduction]]
-|location=[[Location::Metal Workshop|metal workshop]]
 |material=[[metal]] (not [[aluminum]])
-|tutors=[[Tutor::User:Lukas|Lukas]], [[Tutor::User:Luzian|Luzian]], [[Tutor::User:Pakue|Patrick]]
 |similar=[[Disc Grinder|disc grinder]], [[files]], [[sandpaper]]
 |manual=
@@ Line 30: / Line 28: @@
 * 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
+<!--  NOTE: The following block "imports" content from separate pages - please don't change the code! To edit the actual information, please go back and click "edit" next to the section headline you are interested in :-)  -->
+{{#ask:
-== Brüder Mannesmann M1225-125 ==
+ [[MachineType::Bench Grinder]]
-{{MachineInfoBox
+ |order=descending
-|machine name=Brüder Mannesmann M1225-125
+ |format=embedded
-|image=bench grinder.JPG
+ |embedonly=yes
-|synonyms=bench top grinder, grinding wheel;<br>DE: Doppelschleifer, Schleifbock,<br>''Trockenschleifmaschine''
-|type=power [[sharpening]] tool
-|access=[[Bench Grinder Introduction]]
-|location=[[Location::Metal Workshop|metal workshop]]
-|material=[[metal]] (not [[aluminum]])
-|tutors=[[Tutor::User:Lukas|Lukas]], [[Tutor::User:Luzian|Luzian]]
-|similar=[[Disc Grinder|disc grinder]], [[files]], [[sandpaper]]
-|manual=[http://files.voelkner.de/800000-824999/823939-an-01-de-Doppelschleifer_125mm.pdf Völkner.de]
 }}
-This 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 leave a way nicer surface finish.
-=== Maintenance ===
-The wheels need to be "dressed" from time to time in order to produce nice straight edges and maintain stability. Apparently, it's possible to do that with nothing more than a few [[Spring Washers|spring washers]] on a piece of [[Threaded Rod|threaded rod]]!<sup>[https://www.youtube.com/watch?v=AEs7vjw8FIY]</sup> We should try this before spending time and money on a more sophisticated tool.
-==== Changing Wheels ====
-After installing a new grinding wheel, set up a safety perimeter (let's say everyone leaves the room) and let the grinder run for five minutes. Only if that went well, without suspicious noises or visible signs of problems, should the grinder be used again.
-=== Upgrade Ideas ===
-For '''really''' sharp knives, we could turn an [[MDF]] wheel on the [[Wood Lathe|wood lathe]] and use that as the final "grit".
-<br clear="all"/>
-== Triton TWSS10 ==
-{{MachineInfoBox
-|machine name=Triton TWSS10
-|image=Triton TWSS10.jpg
-|extrabox=yup
-|synonyms=wet grinder, whetstone sharpener,<br>dual-purpose wet grinder/stropping wheel;<br>DE: Nassschleifmaschine
-|type=power [[sharpening]] tool
-|access=[[Bench Grinder Introduction|bench grinder introduction]]
-|location=[[Location::Metal Workshop|metal workshop]]
-|material=[[metal]] (not [[aluminum]])
-|tutors=[[Tutor::User:Lukas|Lukas]], [[Tutor::User:Luzian|Luzian]]
-|similar=[[Disc Grinder|disc grinder]], [[files]], [[sandpaper]]
-|manual=[http://www.tritontools.com/Helpers/GetImage.ashx?type=InstructionManual&size=&name=949257_MANUAL.PDF Instruction Manual]<br/>[http://www.tritontools.com/Helpers/GetImage.ashx?type=ExplodedDiagram&size=&name=TWSS10.pdf Explosion Diagram]<br/>[http://www.tritontools.com/en-ZA/ProductSalesSheetPDF?MainCategory=Bench%20Top&SubCategory=Bench%20Top&ModelName=TWSS10 Product Sheet]
-}}
-The Triton TWSS10 provides a stone for wet grinding and a leather stropping wheel. Please ensure you ''always'' empty the water and loosen the torque screw when you are done!
-This grinder is slow moving and intended for the final sharpening passes, not gor quick material removal. It has a 220 grit "diamond wheel" (with a water bath) and a leather honing wheel. It may be nice to add a [https://www.instructables.com/id/Wet-Grinder-Swivel-Base/ swiveling base] under it so you don't need to pick up the machine to switch directions!
-There are quite a few accessories available from the manufacturer. You can find them in the manual (page 8) as well as on the [http://www.tritontools.com/en-ZA/Product/Bench%20Top/Bench%20Top/TWSS10 product page].
-We should document individual accessories as we get (or 3D print) them.
-=== Straight Edge Jig ===
-We have a [http://www.tritontools.com/en-ZA/Product/Accessories/Wetstone%20Sharpener%20Accessories/TWSSEJ straight edge jig] for flat irons like [[Bevel Edge Chisels|bevel edge chisels]] or [[plane]] blades.
 [[Category:Metalworking]]
 [[Category:Sharpening]]