Makita DUC304 Manual De Instrucciones página 18

30
55
Fig.25
— The sharpening angle of 30° must be
the same on all cutters. Different cutter
angles cause the chain to run roughly and
unevenly, accelerate wear, and lead to
chain breaks.
— Use a suitable round file so that the proper
sharpening angle is kept against the teeth.
• Chain blade 90PX : 55°
Chain blade 80TXL : 55°
File and file guiding
— Use a special round file (optional accessory)
for saw chains to sharpen the chain. Normal
round files are not suitable.
— Diameter of the round file for each saw
chain is as follows:
• Chain blade 90PX : 4.5 mm (3/16")
Chain blade 80TXL : 4.0 mm (5/32")
— The file should only engage the cutter on
the forward stroke. Lift the file off the cutter
on the return stroke.
— Sharpen the shortest cutter first. Then the
length of this shortest cutter becomes the
standard for all other cutters on the saw
chain.
— Guide the file as shown in the figure.
1
2
Fig.26
► 1. File 2. Saw chain
—
30
55
Fig.27
► 1. File holder
—
Fig.28
—
—
Cleaning the guide bar
Chips and sawdust will build up in the guide bar
groove. They may clog the bar groove and impair
the oil flow. Clean out the chips and sawdust every
time when you sharpen or replace the saw chain.
Fig.29
18 ENGLISH
The file can be guided more easily if a file holder
(optional accessory) is employed. The file holder has
markings for the correct sharpening angle of 30° (align
the markings parallel to the saw chain) and limits the
depth of penetration (to 4/5 of the file diameter).
1
30
After sharpening the chain, check the height
of the depth gauge using the chain gauge
tool (optional accessory).
Remove any projecting material, however small,
with a special flat file (optional accessory).
Round off the front of the depth gauge again.
1/5