Maintaining and Sharpening Saw Chain

Correctly sharpened chain

A properly sharpened chain slices through wood effortlessly and requires very little feed pressure.

Do not work with a dull or damaged chain as it will increase the physical effort required, cause high vibrations, produce unsatisfactory cutting results and a higher rate of wear.

:Clean the chain.

:Check the chain for cracks in the links and damaged rivets.

:Replace any damaged or worn parts of the chain and match the new parts to the shape and size of the original parts.

It is absolutely essential to comply with the angles and dimensions specified below. If the saw chain is incorrectly sharpened – and in particular if the depth gauge is set too low – there is a risk of increased kickback of the chainsaw, with resulting risk of injury.

3/8

689BA020 KN

The chain pitch (e.g. 3/8") is marked on the depth gauge end of each cutter.

Use only special saw chain sharpening files. Other files have the wrong shape and cut.

Select file diameter according to chain pitch – see table “Sharpening Tools”.

You must observe certain angles when resharpening the chain cutter.

English / USA

A

 

 

B

 

KN

 

689BA021

 

 

 

 

 

A = Filing angle

 

 

B = Side plate angle

 

 

Chain type

Angle (°)

 

A

B

Rapid-Micro (RM)

30

85

Rapid-Super (RS)

30

60

Picco-Micro (PM/PMN)

30

85

Cutter shapes: Micro = Semi-chisel Super = Full chisel

The specified angles A and B are obtained automatically if the recommended files or sharpening tools and correct settings are used.

MS 270, MS 270 C, MS 280, MS 280 C

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