Kaltenbach KPS Series, Manual

Page: 115 / 268

KPS SERIES
Technical Documentation
M-UK-KPS--06
11/02/03 Page 115 of 138
KALTENBACH
6.2.8.2 Grinding requirements flat shear knives
The knives of the shearing unit need to be grinded if the quality of the sheared surface
decreases. The knife needs to be grinded at the cut surface with a roughness (Ra) of
max. 1,6 µm.
NOTICE
Without ‘autmatic cutting clearance’:
Measure the cutting clearance set previous to demounting of the
knives. (During the cutting movement in hand operation, when the
shears are next to each other, press emergency stop and measure
the tolerance with a feeler gauge)
Grind the knives according to under-mentioned drawing.
It is recommended to grind the knives in steps of 0,5 mm until both sides of the knife
are sharp again.
Have your grinder measure the hardness of the knife after grinding. This should be
approx. 57-58 Hrc.
When replacing the knives, justify the loss from grinding by filling plates of 0,5 or
1,0mm. In this way the correct tolerance is set again.