90° KN 689BA018

689BA043 KN

NHold the file horizontally (at a right angle to side of guide bar) and file according to the angles marked on the file holder. Rest the file holder on the top plate and depth gauge.

NAlways file from the inside to the outside of the cutter.

NThe file only sharpens on the forward stroke – lift the file off the cutter on the backstroke.

NAvoid touching the tie straps and drive links with the file.

NRotate the file at regular intervals while filing to avoid one-sided wear.

NUse a piece of hardwood to remove burrs from cutting edge.

NCheck angles with the filing gauge.

All cutters must be the same length.

If the cutters are not the same length, they will have different heights. This makes the chain run roughly and can cause it to break.

NFind the shortest cutter and then file all other cutters back to the same length. It is best to have this work done in the workshop on an electric grinder.

Depth gauge setting

a

689BA023 KN

The depth gauge determines the height at which the cutter enters the wood and thus the thickness of the chip removed.

aSpecified distance or setting between depth gauge and cutting edge.

This setting may be increased by

0.2 mm (0.008") for cutting softwood in mild weather season – no frost.

 

 

 

English

Pitch

 

Depth gauge

 

 

setting (a)

inch

(mm)

mm

(inch)

1/4

(6,35)

0,65

(0.026)

3/8 PMN

(9,32)

0,45

(0.018)

3/8 PM,

 

 

 

PMMC3

(9,32)

0,65

(0.026)

0.325

(8,25)

0,65

(0.026)

3/8

(9,32)

0,65

(0.026)

0.404

(10,26)

0,80

(0.031)

Lowering depth gauges

The depth gauge setting is reduced when the chain is sharpened.

NUse a filing gauge to check the setting every time you sharpen the chain.

1 KN 689BA047

NPlace a filing gauge (1) that matches the chain pitch on the chain – if the depth gauge projects from the filing gauge, the depth gauge has to be lowered.

MS 362 C

47