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In order to be able to efficiently sharpen your chisel or chisel, basic knowledge of the structure of the chisel is required. From these parts there is a chisel:

grip

the iron

  • one side of the iron with bevel
  • the other side of the iron plane (the mirror side)
  • The chamfer forms the cutting edge, where it meets the mirror side. The angle of the chamfer can be different. In western chisels, as is traditionally customary, this angle is 25 degrees. In Japanese or general Asian chisels, it is often 30 degrees. When working later with the chisel, the clearance angle is determined via the chamfer.
  • Different approaches to chisel sharpening

When sharpening a chisel, it may or may be necessary to proceed differently. This manual includes the usual re-sharpening, the fast (exceptionally) sharpening and the sharpening of a severely damaged or damaged bevel.

The Abrasive Stone

For ordinary sanding, a whetstone or whetstone is required. This must be present in two grits. Many wet grinding stones are provided on one side with a 220 grit, on the other side with a 400 grit. It can also be used finer honing stones, but this significantly increases the workload and requires more patience. Schleif Grindstones that are prepared with water can be used, as well as grindstones that use petroleum. If the chamfer of the chisel is severely damaged, rough grinding with a machine is recommended. It can be a dry or wet grinding machine. Important with the machine is that it has a support surface whose angle is to be adjusted.

The conventional grinding of a chisel

The chisel is ground with a flat chamfer in a circular motion. It is important to ensure that the whetstone is always sufficiently wet. Either sanding is done until an existing ridge is completely sanded off.

Or it has to be sanded until the burr forms easily on the mirror side. Then the mirror side is laid flat and only this resulting ridge is removed. There is no chamfered on the mirror side!

The fast grinding of a chisel

In principle, a microfiber is needed only at the tip, at the bevel and mirror converge. These can be polished by gently lifting the chisel on the whetstone. The chamfer is then not on. The width of this microfiber is from 0.1 mm. In both cases, the chamfer is only on the chamfer side!

Sharpening a massively blunt or damaged chisel

A disk sanding machine can also be used for this purpose. The bevel is ground until the damage has been ground. It is important to make sure that the chisel on the chamfer does not glow.

Tips & TricksAlso other cutting tools should be sharpened and we also offer a suitable guide. Here you can read about how to sharpen a scraper blade.

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