tormek KJ-45 Instructions page 5

Important Make sure the clamp grips the blade so that both jaws of the
clamp enclose and are in full contact all the way along the blade so as to
ensure that the knife is firmly centered in the jig. Even wedge-shaped blades
must be in contact with the clamp along their entire length. You may need to
go back and loosen the small adjusting screw slightly before tightening the
knob so that the clamp can grip wedge-shaped blades properly.
Minimum blade height
The jig needs to grip the blade by at least 2 mm. You can sharpen
knives with a minimum blade height of 12 mm at the attachment
point, with a total edge angle of 20°. To sharpen smaller knives,
use the SVM-00 Small Knife Holder together with the KJ-45
Centering Knife Jig.
Blade thickness
Max 10 mm
You can use the KJ-45 Centering Knife Jig with your thinnest
knives, up to knives with a blade 10 mm thick. The maximum
thickness for knives with a tapered cross-section, tapering from
the back to the bevel, is about 6 mm at the back.
Max 6 mm
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