Your Short Guide to Using a Bench Grinder

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Definition

A bench grinder can be used with various types of wheels to sharpen, clean, shape, polish, and buffy metal. It’s typically used to sharpen tools, polish tiny pieces of steel, and repair broken blades.

Types of Wheel

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Buffing wheel

This is a soft cloth that enables you to polish surfaces. Rouge is a buffing compound applied to the wheel so you can shine with ease.

Wire wheel

This is best for removing rust from metals prior to the sharpening procedure.

Firestone

This wheel is perfect for flattening out a chisel.

Rough stone

This is used to repair tools such as smoothing out the rough edges of an old screwdriver.

How to Use a Bench Grinder

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Step 1: Wear the appropriate outfit

Wear gloves and safety glasses. Bench grinders emit sparks, and you don’t want to harm your skin and eyes. Use the eyeshield as well. This is a safety feature that comes with the grinder.

Step 2: Use the right wheel

Attach the correct wheel for the task. 80-100-grit wheels are for sharpening metal parts, a 60-grit is for chisels and plane irons, and a 36-grit wheel is for sharpening the usual gardening tools.

Step 3: Secure the material

Place the material to be smoothened against the front wheel. Angle should be around 25-30 degrees.

Step 4: Start grinding

Move the tool back and forth across the wheel. It’s crucial to move continuously to avoid the buildup of heat on the tip of the tool you’re smoothing out. A coarse grit and a constant motion can prevent the metal from overheating. If the tool starts to heat up, simply put it in a coffee container filled with warm fast-quenched oil or in a can of water.

Tips

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Install the wheel correctly

When installing a wheel, make sure you don’t overtighten the nut. Overtightening could cause the wheel to crack, and that’s terrible news.

Use pliers to grind tiny items

If you need to grind small objects, safely do it by using locking pliers to hold them in place. This will shield your fingers from the danger that a grinding wheel can bring. Using pliers can protect your hands from burns caused by hot metals. It’ll even give you greater control over the grinding procedure.

Use a low-speed grinder

For sharpening, it’s best to use a low-speed grinder. However, if the bench grinder comes with a variable speed feature, then just lower the speed. Most grinders operate at around 3,450 rpm. For sharpening, adjust the speed to about 1,750 rpm. This will decrease the chances of overheating the edge of your tool.

Know more about bench grinders in this news article