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Tips for Successful Routing 
Chipping and Tearout 
One of the most common problems woodworkers will encounter 
when using a router is chipping and tearout of the workpiece. 
The following tips can reduce the occurrence of chipping and 
tearout. 
► 
Take shallower passes to reach your final depth. With a 
shallow pass, the router bit teeth will be cutting parallel with 
the grain instead of arching through the grain. 
► 
Examine the woodgrain before routing. If possible, orient the 
workpiece so the grain doesn't fracture. To identify the grain 
orientation, examine the edge grain, not the surface grain. 
Use the following tips: 
► 
If the grain orientation is not in the right direction, turn 
the board over. (Rotating the board to the opposite edge 
does not change the orientation. Rather, you must flip 
the board over.) 
 
► 
For tight-grained woods where the grain 
orientation is not obvious, look for pre-existing 
signs, such as small splinters at the corners. 
You can also use a knife to cleave the grain. 
► 
For open pore woods such as oak, examine the 
capillaries on the edge of the wood. Orient the 
board so the router is moving away from the 
capillary entrance holes. 
 
Chatter 
Router bit chatter is the presence of small curves, or scallops, 
in the routed profile. The following items may cause chatter: 
► 
Too fast of a feed rate for the router RPM. 
► 
Trying to take too much material in a single pass. 
► 
Climb-cutting. 
► 
The smaller the diameter of the router bit, the more 
prominent or noticeable the chatter will be. 
If chatter is present in the routed profile, making a low-speed 
cleanup pass typically removes the marks. 
 
Router Control 
There may be times when holding the router at 
arm’s length does not afford you a fine enough level 
of control for small movements. Such is typical when 
turning corners or nibbling away at a profile in 
multiple passes. One method for achieving finer 
control is to keep one side of the router stationary, 
as a pivot point, and rotating the other side (as 
shown to the right). This is helpful when 
approaching areas in a cut where the router might 
tend to grab. 
A similar stance may be used when you use the 
friction of your forearm to assist you in maintaining 
a constant feed rate (see page 7). This is because 
your muscles need some reaction-time to react to a 
sudden grabbing of the bit, but friction is 
instantaneous, and will always oppose the feed rate, 
even when it changes suddenly. 
Supplemental User’s Manual 
17