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A bench grinder performs a range of woodworking tasks, including knife repair. Garden knives often get blunt, especially after a hectic season. Working with a blunt knife means you need to exert additional pressure, and you might not achieve a clean cut. A dull knife also puts more strain on your arms, hands, and back.
Most gardeners use whetstones to sharpen them, which may not be useful if the knife is extremely dull. A whetstone only hones the blade keeping it sharp in between the actual sharpening. A bench grinder, on the other hand, sharpens removes a small amount of the knife material to produce the sharp edge.
It also comes in handy when sharpening large gardening, grafting or pruning knives, then a bench grinder should come in handy. This is because grafting and propagation knives should be razor-sharp for the best results.
Also, bench grinder wheels spin at an incredibly high speed that trims off any dings and nicks, leaving the knife sharp. Also, the device provides a more affordable solution compared to buying a new garden knife.
Clean the blade using a wire brush and wipe the surface using an oily rag to remove rust and dirt. Be sure to apply some general-purpose oil, too, as garden tools are prone to rust if not treated regularly.
Inspect the knife to find out the number of blades it has. Pruning knives, for example, have two sharpened sides while pocket knives have one flat and one bladed side.
Turn the bench grinder on and place the blade on the tool rest to start grinding. Then, apply light downward pressure while pushing the edge forward to sharpen a knife with a straight blade.Turn the knife over, holding the blade flat against the wheel, brushing it across the surface to remove rough edges.
The same process applies to knives with double-sided blades to keep the blade balanced. For single-sided blades, check the flat side for sharp burrs. You can remove them by running the flat side of the edge across the coarse-grit wheel several times. Avoid sharpening this side of the blade as it affects the cutting impact.
Hold the sheet of paper and rest the blade at the top edge. If the knife cuts through with minimal effort, then it is sharp; if not, repeat the process. Then wipe the blade and store it in a dry place.
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