Reece 32

A98

CENTER CUTTING

Normally, a center knife should be be replace approximately every 5000 pockets depending upon the material being cut. Within that period, the knife ·may require resharpening; this can be done by using a fine grade of oil stone. As the knife be.gins to dull, a pronounced pounding noise will be heard or a ragged center cut will be made. A supply of sharpened or new knives should be kept availa– ble for ready replacement. To replace a center knife, first disconnect the air pressure; now loosen the two screws (A) which hold the center knife in place; at this time, raise the knife up through the throat plate, then dmm again. To replace a knife, place the knife up into the throat plate, then dmm be– tm~en the clamp plate and the center knife holder, all the way to the stop screw. CENTER KNIFE TO THROAT PLATE SETTING While the air is still disconnected, push the knife holder (B) up so that the center knife passes up through the throat plate; it must not de– flect more than .002" and must pass flush with the cutting edge of the throat plate. The cutting edge of the throat plate is the right side of the center slot when facing the machine. With the clamp table in the rear position: 1. Manually move center knife up through throat plate. 2. Loosen set screws (C) on bearing blocks and adjust centerknife side– WJ.ys until knife passes through the throat plate with no gap or deflec– tion between knife and throat plate; tighten set screws (C). At this point, the center knife should be able to cut a single strand of thread. To adjust:

From the Library of Superior Sewing Machine & Supply LLC