Northern Industrial Tools 9.6V User Manual - page 9
Page 9 of 10
SHARPENING THE CHAIN
1. Set your saw on a flat, solid surface so it will not slip while you are sharpening the chain. The chain
tension should be adjusted as specified in the Chain Saw Owner’s Manual. If it is too loose, the teeth
will move, resulting in a poor sharpening job.
Sharpening will be best accomplished if done on the flat of the saw bar – somewhere near the middle of
the bar.
2. The saw should first be positioned so that you are looking at the side of the chain bar with the motor
to your right. Cutter teeth on the far side of the chain are sharpened, from inside to outside, or away
from you, as shown in Figure 5. The guide (B) should be laid flat on the tooth with the 30º index line (L)
parallel with the chain. This index line should be aligned by eye with the chain.
Two or three light strokes are usually enough unless the cutters have been damaged. Sharpen all
cutters equal. Start with the cutter with the most visual damage (i.e. nicks or gouges) and sharpen all
cutters back equally. Do not remove excessive material as this only shortens the life of the chain.
Note: Sharpen cutter teeth (J) only, not the depth gauge (K).
3. When all of the teeth on the top of the bar have been sharpened, advance the chain using a glove or
a rag to protect your hand, by pulling the chain toward the end of the bar. Repeat until all the teeth on
the far side of the chain have been sharpened.
4. Turn the saw around so that you are looking at the side of the chain bar with the motor to your left.
Sharpen the cutter teeth on the far side of the chain, from inside to outside, or away from you, as shown
in Figure 6. The guide should be laid flat on the tooth with the 30º index line parallel with the chain.
Repeat the process above to sharpen all of the cutter teeth on the far side of the chain.
5. After your chain has been sharpened a number of times, you may find that it does not cut as fast as
you feel it should. Each cutter on your chain has a depth gauge (K) just ahead of the cutting edge (J)
that determines how big a bite it can take. To check for proper depth of the cut, lay a metal straight
edge across the tops of the cutting edges, as shown in Figure 7, and check the dimension indicated.
This dimension should be approximately equal to the thickness of the gauge furnished with your chain
saw sharpening kit. If it is not, file or grind the chain depth gauge until the clearance is approximately
equal to the thickness of the sharpening kit gauge. Be careful to maintain its shape. Do not remove
more material than necessary or you will overload your saw. Also, be careful to keep this depth gauge
setting uniform on all cutter teeth or you will not be able to make a straight cut.
NO.
DESCRIPTION
1
Sharpening Attachment kit
2
Gauge & 2 Spacers
3
5/32" Grinding Wheel
4
3/16" Grinding Wheel
5
7/32" Grinding Wheel
Parts list
(see Fig. 8)