GRINDING CHISEL CHAIN
1. Choose and dress the grinding wheel as explained
earlier. Refer to Illustration No. 2 for correctly
ground chisel cutter.
2. Place chain in chain vise with the cutting edges
facing to the left.
3. Tilt the grinding head to 30° and lock.
4. Set and lock chain vise at 30° to the left (rotating
clockwise from 0°). See Illustration No. 4.
5. Slide the chain vise back and lock it on 1½ on the
horizontal scale.
6. Position the stop finger behind the right hand cut-
ter to be ground and align the tooth to the wheel.
Set the depth stop.
7. Turn the motor switch to "Forward" position
(counterclockwise rotation when viewed from
wheel end of shaft) and adjust the stop finger for
the lightest grinding pass that will sharpen the
tooth properly. Grind all right hand cutters with-
out changing your set up.
8. Slide the chain vise forward and lock at 1½ on
horizontal scale.
9. Rotate the chain vise right and lock at 30°. See
Illustration No. 4.
10. Position the stop finger behind the left hand cutter
to be ground and align the tooth to the grinding
wheel. Change only the stop finger position if
necessary.
11. Grind all left hand cutters with the motor switch
in the "Reverse" position.
12. Check and grind depth gauges if necessary. See
Illustration No. 11 under Grinding Chipper Chain.
OREGON # 8 0 SERIES CHAIN
1. Use a 5/16" thick wheel with a straight face. Face of
the grinding wheel must be 90° to the sides of the
wheel.
2. Place chain into chain vise and position stop finger
behind a right-hand cutter.
3. The chain vise should be set at 0° on the scale and
the 0 position on the horizontal scale. Grinding
wheel should be set at 10° right on the grinding head
scale.
Grind the tops of all right and left cutters the same
height.
Illustration No. 9
4. To grind depth gauges, set the stop finger behind a
right hand cutter. Set the wheel to 15° left on the
grinding head scale. Move the chain vise to posi-
tion the depth gauge directly under the wheel and
grind all of the right hand depth gauges .020 lower
than the tips of the cutters. Set the stop finger behind
a left hand cutter. Position the left hand depth gauge
under wheel and grind all left hand gauges. Leave
grinding head at 15° left.
5. Grinding faces of cutters (not required every sharp-
ening unless chain has been damaged or is extremely
dull). Dress 3/16" thick wheel round to fit the radius
gauge. Chain bar set at 0° position on the side scale
and at 22° to the left (clockwise from 0°) on the
chain vise scale.
Set the grinding head at 22° and grind all right hand
cutters.
6. Swing the chain vise to the right and lock at 22°.
Grind all of the left hand cutters.
ADJUSTMENT-CHAIN VISE
The opening and clamping range of the chain vise is
controlled by the two 3/8 nuts on the vise shaft and
lever assembly.
Back off the outer lock nut. Adjust the vise opening
with the inner nut while holding the vise lever in the
proper position to provide full travel — lock to unlock.
Hold the inner nut in place and tighten the lock nut.
Page 6
.020
22° BEVEL
22° HOOK
15°
10°
OREGON 80 CHAIN
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