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Tip
#34
Planer
Pg.
1-3, Pg. 4-6, Pg.
7-9, Pg. 10-12, Pg.
13-15 (PDF)
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Getting
the Smoothest Possible Cut
The cutterhead
speed and feed rate combine to give you a certain number of
cuts per inch (cuts/inch). Generally, as the cuts per inch
increase, the planed stock becomes smoother. To raise the
number of cuts per inch, increase the cutterhead speed and
decrease the feed rate. To calculate the exact cuts/inch,
use this equation:
|
RPM
x 3
|
=
Cuts/Inch |
|
SFPM
x 12
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You'll
also find your planed stock gets smoother as you take shallower
cuts. A shallow depth of cut does not lift the wood grain
as badly, and it reduces the risk of chipping or tearing out
hunks of wood.
To get
the smoothest possible surface on your planed stock, reduce
the depth of cut to 1/64" or less on the last pass through
the planer. Increase the cutterhead speed one to two letters
and decrease the feed rate to SLOW. If the planer slows or
stops during a pass when the feed rate has already been adjusted
to SLOW, turn off the machine immediately. Lower the table
and remove the stock. Try the pass again with a shallower
depth of cut. If that doesn't help, try a slower cutterhead
speed (Mark V mounted thickness planer only).
Continue
to General Thickness Planing
Back to Thickness Planer Speeds &
Feed Rates
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