39FS 300, FS 350, FS 400, FS 450, FS 480
English / USA
Never attempt to straighten or weld 
a bent or cracked cutting tool – it 
might shatter and cause serious or 
fatal injury.
: Resharpen frequently, take away as 
little material as possible – two or 
three strokes of the file are usually 
enough.
To avoid out-of-balance:
: Resharpen the cutters (1) uniformly 
– do not alter the contour of the 
parent blade (2) in any way.
: After resharpening about 5 times, 
have blade checked on STIHL 
balancer*.
Grass Cutting Blades, 
Brush Knife
Use a flat file* to sharpen dull cutting 
grass cutting blades. 
In case of more serious wear or nicks: 
Resharpen with a grinder or have work 
done by STIHL dealer.
Chisel Tooth 
Circular Saw Blades
Sharpen as described in the instructions 
supplied or printed on the inside of the 
blade's packaging.
Scratcher Tooth 
Circular Saw Blades
Use a flat file to file the backs of the teeth 
until the tips of the teeth are restored to 
full sharpness.
* see "Guide to Using this Manual"
Sharpening 
Metal Cutting Tools
2
2
1
2
1
1
002BA042 KN