Feb 18, 2020
DANGER: Slitter blades are extremely sharp! Extreme caution should be used whenever adjusting, changing or slitters. Power should be removed from motors before performing work on the bottom slitter bands. Air pressure should be removed before work is performed on the top slitter blades. Wear leather gloves when working with slitter blades or bands.
Slitters must be sharp and properly sharpened. The cutting edge must be free of burrs and cutting remnants. The best way to maintain a continual supply of sharp slitter blades is, of course, to use the Valmet BladePool service which uses the superfinishing process for sharpening blades and bands. If, however, you choose to do your own sharpening, here are some general instructions for sharpening at the mill.
These instructions are for Valmet slitter blades.
WARNING: Cutting hazard. The top slitter is sharp. Use safety gloves to protect against cuts.
Fasten the top slitter to the grinding jig.
Place the grinding device table in the direction of the top slitter's side surface.
Grind with a boron nitride wheel, Norton CB181-TBB or equivalent.
The smallest diameter of the top slitter is 165 mm (6.5").
These instructions are for Valmet hard metal ring model slitter bands.
WARNING: Cutting hazard. The band is sharp. Use safety gloves to protect against cuts.
Fasten the band to the grinding jig.
Sharpen only at the band side surfaces.
Grind with a diamond wheel, Norton ASD 76-R100-B99 or equivalent.
NOTE: Do not use a manual grinding stone for finishing.
NOTE: Diamond wheels are not suitable for steel grinding.
If needed, grind the band steel part with aluminum oxide wheel.
For assistance with improving the safety and efficiency of your slitting operation, review the slitter management Related Links and contact your Valmet representative.