NPK M20C, Instruction Manual, Page: 78 / 152

-
78
-
GENERAL MAINTENANCE
DETERMINING REPLACEMENT OR BUILD UP
STEP 3a
If the gap between the straight edge and the piercing tip is minor and the wear on the
lead edge and corners of the tip is not excessive, weld build-up of the tip is
recommended, (see “BUILD-UP OF THE PIERCING TIP” ). If tip wear is excessive,
replace the piercing tip, (see “REPLACING THE PIERCING TIP” ).
STEP 4a
After completing the welding and grinding of the tip, place the steel straight edge, once
again, on the face of the primary blades to confirm that the side of the piercing tip and
primary cutting blades are parallel.
STEP 5a
Slowly close the processor jaws until the piercing tip (DA) enters the tunnel, verify the
clearance (d66) between the lead edge of the piercing tip (DA) and the tunnel blade
(DB). This clearance should be approximately .020” - .040” ( 0.51 – 1.02 mm ).
Additional welding or grinding may be required to achieve the desired clearance, see
Fig. C.
When installing a new piercing tip, the clearance between the piercing tip and tunnel
blade can be set when placing the new tip in the male jaw.
Fig. C