OPERATION

DIRECTION OF FEED AND THRUST

See Figures 6 and 7.

The trimmer motor and cutter revolve in a clockwise direc- tion. This gives the tool a slight tendency to twist in your hands in a counterclockwise direction, especially when the motor starts.

Feed the trimmer into the workpiece from left to right. When

TRIM GRAINS

fed from left to right, the rotation of the cutter pulls the trim-

 

mer against the workpiece. If fed in the opposite direction,

 

the rotation forces of the spinning cutter will tend to throw

END FIRST

This could result in loss of control of the trimmer.

the trimmer away from the workpiece, causing kickback.

 

Because of the extremely high speed of cutter rotation dur-

 

ing a proper feeding operation, there is very little kickback

 

to contend with under normal conditions. However, should

 

the cutter strike a knot, hard grain, foreign object, etc. that

 

would affect the normal progress of the cutting action, there

 

will be a slight kickback. Kickback could be sufficient to

 

spoil the trueness of your cut if you are not prepared. Such

 

a kickback is always in the direction opposite the direction

 

of cutter rotation.

 

 

To guard against kickback, plan your set-up and direction

 

of feed so that you will always be thrusting the tool—to

 

hold it against whatever you are using to guide the cut—in

 

the same direction that the leading edge of the cutter is

 

moving. The thrust should be in a direction that keeps the

 

sharp edges of the cutter continuously biting straight into

 

new (uncut) wood.

 

DIRECTION

 

FEED TRIMMER

 

ROTATION

TRIMMERFEED DIRECTION

BIT

 

 

BIT

 

ROTATION

TRIMMER FEED

 

DIRECTION

 

 

Fig. 6

GUIDE OUTSIDE

 

 

THRUST

ROTATION

FEED

 

GUIDE

GUIDE INSIDE

ROTATION

GUIDE

FEED

THRUST

Fig. 7

Page 12

Page 12
Image 12
Ryobi TR45 manual Direction of Feed and Thrust, Direction Feed Trimmer, Bit, Trimmer Feed Direction Guide Outside Thrust