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Sharpening Step-By-Step Guide (Part 3)
This section takes you step-by-step through the correct method for sharpening your hand instruments
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Part: [ 1 | 2 | 3 ]
Columbia 13 Universal Curette
Universal curettes have blades at 90° to the shank. The toe is rounded and the lateral faces are cut back so that both have cutting edges.
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1. Taking the instrument in a Pen Grip, turn the blade so that the hook faces left. If viewed from the side, the curved portion towards the toe will face downwards.
2. Angle the blade to about 30° from the stone.
3. Move the blade forwards and backwards over the stone, putting pressure on in the “pull” direction, and moving around the curve of the blade.
4. Turn the blade over and change to the Palm Grip.
5. Move the stone to the edge of the table or bench you are working on and lower the handle angle to 10° to the stone.
6. Again, move the blade forwards and backwards, adding pressure when pulling.
7. Test the tip for sharpness and remove any wire edge.
8. Finally, ensure that the toe has not become pointed: if necessary rework around the toe to regain its shape.
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Gracey 9 Dedicated Curette
Dedicated curettes have blades that are 70° to the shank; the toe is rounded; and only one lateral face is cut back, so they only have one cutting edge.
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1. Taking the instrument in a Pen Grip, turn the blade so that the hook faces left. If viewed from the side, the curved portion towards the toe will face downwards.
2. Angle the blade to about 30° from the stone.
3. Move the blade forwards and backwards over the stone, putting pressure on in the “pull” direction, and moving around the curve of the blade.
4. Test the tip for sharpness and remove any wire edge.
5. Finally, ensure that the toe has not become pointed, and rework as necessary.
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Raise the edge of the sharpening stone (for example, with a test stick) to better see the 70° cutting edge.
Excavator 126
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1. Hold the instrument in either the Pen or Palm grip, whichever is more comfortable.
2. Hold the instrument at around 30°, place the one side of the tip's cutting edge onto the stone push the tip forward and backwards, rocking your way around the edge as you go.
3. Continue this process all the way around the tip, adjusting the instrument angle as necessary to following the tip shape.
4. Test the tip for sharpness, removing wire edges as necessary.
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Take care not to create points or corners while sharpening; the cutting edge should form a continuous curve.
Part: [ 1 | 2 | 3 ]
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