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CONAIR
MARTIN
05-15-96 79 14
7.2 Sharpening the knives
Always take great care when sharpening the knives since they
are very sharp and can cause personal injury.
7.2.1 Overview
NOTE: Use the services of a skilled person when re-sharpening the knives
and only sharpen the edges marked with the special sign! (see diagram
under 7.2.2 and 7.2.3)
The knives must be sharpened so that the correct grinding angles are obtained,
otherwise the granulator will not operate effectively with lightly cutting knives.
During sharpening, the knife must be cooled the whole time with plenty of
water and must definitely not burn or start blueing on the edge since this means
that the knife lacks durability and stability. If this occurs, the knife cannot be
repaired by further grinding down or grinding away of the blued or burnt
colour. The tempered knife may have deep deformations with possible cracking
as a consequence.
The following instructions apply only if you are using CONAIR MARTIN'S
sharpening fixture SF 79. The sharpening fixture is intended for use in a surface
grinding machine and should be fixed on a magnetic board.
7.2.2 Sharpening the fixed and rotating knives
Fixed knives:
NOTE: Only the surfaces marked with the special sign should be sharpened.
The specified measurements apply when sharpening the
knives.
• The fixed knives are fastened as shown in the figure
opposite (A) and the relief angle, 20
0
, is sharpened.
• The knives can be sharpened only as much
as is shown in the figure opposite. After
that, they are worn out and should be
replaced by new ones in order for the
granulation to be effective.