Makita 1912B Instruction Manual page 6

Using blade gauge for even blade setting
Although the blade protrusion for desired cutting depth i s easily obtained by turning the
front knob, the setting of the blade itself in relation to the work may require adjustment.
This i s done conveniently with the blade gauge provided.
First, remove the blade from the tool by unscrewing the hex bolts. Now set the blade on
the gauge base so that the cutting edge of the blade is perfectly flush with the inside flank
of the gauge plate. Loosen the screws on the adjust plate, then simply press in the heel of
the adjust plate flysh with the back side of the gauge base and tighten the two screws on
top. This insures that your blade tip will be set properly when remounted in the tool so
as
1 ) Set blade tip flush with inside flank of
2) Press in heel of adjust plate flush with
3)
Tighten two screws on the adjust plate
gauge base.
back side of gauge base.
to hold blade in place.
Adjust plate
Planer blade
Inside flank
of gauge base
Gauge base
I
For the correct planer blade setting
Your planing surface will end up rough and uneven, unless the blade is set properly and
securely. The blade must be mounted so that'the cutting edge is absolutely level, that is,
parallel to the surface of the rear base. Below are some examples of proper and improper
settings.
(A)
Front
base (Movable shoe)
( B ) Rear base (Stationary shoe)
Correct
setting
Nicks i n
surface
Gouging
at start
Gouging
at end
6
Although this side view cannot show
it,
t h e edges of t h e blades run perfectly
parallel to the rear base surface.
Cause : One or both blades fails to have
edge parallel t o rear base line.
Cause: One or both blade edges fails
t o protrude enough in relation
t o rear base line.
Cause: One or both blade edges pro-
trudes too far in relation t o
rear base line.