Sharpening Knives - Yamato VG3511-8F Instruction Manual

High speed cylinder bed 3-needle interlock stitch machine
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7.7 Sharpening knives

If the knives cut badly, re-sharpen the lower knife ② .
Prepare the cold water and re-sharpen the lower knife with
keeping it cool.
Re-sharpen the correct angle as in the figure.
 ADVICE
Normal grinder is not useful to sharpen the upper knife
① made of super hard alloy. Contact us directly or the
dealer for re-sharpening it.
Fig. 7-14
10°
Fig. 7-15
39
7. Trimming mechanism
45°
VG3511-8F

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