Scary Sharpening Abrasive Sheets
3MSCARY-3Scary Sharpening Abrasive Sheets (PSA) - this industrial product has a superior performance with respect to its wear rate of the grit and backing medium, compared to the original lapping films used for fibre-optic polishing.
We use these abrasive sheets in our furniture workshop and has been very well received by our students - designed for use in the metalwork micro-finishing industry and a far more robust product overall.
The higher the micron or U number, the coarser the grade. Each sheet is 280mm x 230mm and makes approximately 3 strips for scary sharpening tasks.
The abrasive cutting is quicker, lasts longer and is less prone to tearing during use. This abrasive is available in a number of grades from 80 micron (180 grit) to 3 micron (8000 grit).
Here's a guide to help you to select the micron size, but you will find how it works best for you with experience.
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80u - (180 Grit) Black - For removing original grinding marks on new blades or grinding the primary bevel; cleaning or initial lapping of plane soles to remove damage or rust
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40u - (360 Grit) Blue - Used for flattening new chisels and plane blades (if required) initial primary bevel forming and lapping plane soles
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20u - (1000 Grit) Red - Great for general secondary bevel and backing off chisels and plane irons
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15u - (1200 Grit) Orange - Refining secondary bevels on chisels and plane irons and backing off
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9u - (2500 Grit) Light Blue - Produces micro bevel and backing off chisels, plane irons and knifes; should cut hair but the edge can be improved if required
- 3u - (8000 Grit) Pink - A very fine lapping film , gives a polished edge to your tools
You may wish to use this fine edge for your general woodworking or improve it further by using a leather strop and honing paste or move over to lapping films for a final polishing of the edge.
