The golden rule for making a flat surface is to start with a concave one, produced by lapping the surface on a smaller abrasive surface.
This narrow self adhesive strip of diamond encrusted steel from Japanese diamond abrasive specialists Atoma is ideal for the initial stage of preparing, restoring and maintaining the desirable slight concavity in the underside of chisel blades.
Inexpensive, aggressive, durable and controllable, this narrow 10mm x 100mm can be fixed close to the edge of any flat surface.
Because the strip is narrower than the surface being abraded it works within it and can be used to work on bumps in isolation or hollow the surface by a couple of thou (the two things you can't do on a surface larger than the tool). With the blade prepared, you can then go back to using larger surfaces as normal and everything will work beautifully.
Flexible and self-adhesive
0.5mm x 10mm x 100mm
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Saved a bellied chisel
I have a Ward chisel that holds some sentimental value. It is (was) significantly bellied which limited its use. I sought advice from Matthew, outlining my plan to buy a coarse Atoma plate to flatten the back. He explained to me the likelihood that I would exacerbate the convex / bellied shape if I were to follow that route and advised this product to locally abrade the belly, introducing a fractional concavity, before flattening as usual. This has worked perfectly and the chisel is greatly improved. One reason I continue to buy from Workshop Heaven is Matthew’s willingness to recommend that best tool for the job, rather than the most expensive. If you have a bellied chisel that you’re willing to invest a little time and effort into, this is likely the tool you need. Strongly recommended.