Graphical Construction Glossary >> Tools. >> Power Tools >> Bench Grinder

Bench Grinder

A workshop machine that drives abrasive wheels and other accessories. Used for grinding, sharpening, cleaning and buffing. Also known as a pedestal grinder.

A small bench grinder Photo thanks to Wikimedia Commons, User: Nemo5576

An essential workshop machine. There are a huge amount of wheels, discs, wire brushes and buffer pads available for these versatile machines. My old machine always has a green grit (silicone carbide) wheel on one side for sharpening TCT masonry bits. Here are a few things to look out for if you are looking to but a good bench grinder.

• MUST HAVE the main safety features of easy on off switch, eye shields, (though you should always use a personal face mask or goggles and a sturdy but adjustable base for supporting the material. The base should be adjusted to around no more that say 1/8" or 3mm from the wheel.
• One of the features that I like in the modern grinders is the use of variable speeds which means they will be excellent for grinding tools with less risk of burning them.
• As with most modern machine tools a good adjustable light is essential.
• Depending on how much changing of wheels is done then a quick change feature may be worth while.

A bench grinder set up for wire brush work, Photo thanks to Multimedia Commons, User: Noodle snacks

Be particularly careful when using these machines. They have high speeds and any misuse can cause wheels to shatter. Never use a grinding wheel if you have dropped it. When using wire brushes like above a try to always use a leather apron and gloves as these wheels shed wires very easily.

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