Lukas SC 557 - Manual (Page 34)

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10.3.7Sharpening the blades
Grinding area
Only remove and smoothen any burrs!
Chips or deep grooves cannot be ground away. The blades must be replaced in these
cases.
CAUTION!
Only grind in the grinding area (see illustration)!
The sliding faces, in particular, must not be reground!
Tools required: 1. Use jaw protection on clamping device (e.g. vice) in order not to
damage the blades
2. Grinder (e.g. angle grinder or belt grinder) with abrasive having
a grain size of 80.
Procedure:
1. Clamp the blade securely into the clamping device so that it cannot move, but with the
grinding area exposed.
2. Carefully grind the burr away evenly until you reach the sliding surface level. (see
illustration)
CAUTION!
If you have not maintained the smoothness or incline, the proper operation of the
blade is no longer guaranteed and the blades must be replaced.
In addition, when grinding, you must make sure that the inclination of the cutting surface
in the direction of the blade arm movement is not changed. Check the incline and
smoothness of the ground surface, using a suitable measuring tool.
Direction of movement
Blade arm
Pivot point
Blade arm
Slide surface plane
Slide surface
plane