SHARPENING THE CUTTERS
8) The Upper and Lower Cutters must be sharpened in a Cutter Grinder, which has a Jig to hold the Cutters at the proper angle. Those customers who do not have a Merrow Cutter Grinder can have dull Cutters sharpened by sending them to your distributor or to the Merrow Machine Company, 11 Patterson Brook Rd. West Wareham, MA 02576 USA.
9) When using the Merrow Cutter Grinder, be sure that the retaining groove for the Cutter is perfectly clean before inserting the cutter and clamping the cutter into the cutter holder. The Cutters should be carried entirely across the grinding face of the Wheel so that they may be sharpened properly, and to prevent the Wheel from becoming worn unevenly and requiring replacement.
10) Very little need to ground off the Cutters. If too much is ground at one passage across the face of the Wheel, the temper of the Cutter will be drawn and its cutting quality greatly impaired.
11) The Cutter should not be discolored by grinding.