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Granberg ripping chain has been modified further – this configuration features x2 scoring cutters followed by x2 clearing cutters. The easiest way to sharpen this is by making all the cutters 10 degrees however if you wish you can sharpen the scoring cutters to 20 degrees and the clearing cutters to 5 degrees.
Please bear in mind this process is carried out manually on a grinding machine at the factory and so some of the scoring cutters can become hardened in the process. This makes them very hard to sharpen using a round file and some sort of grinder may be required. The .325 Granberg ripping chain is part ground and can look a little crudely modified – however it does do the job as intended.