OPERATION SRM-2620T
28 X7502341801
© 03/2019 ECHO Inc.
Push and Pull Forces
Push and pull forces are reactive forces that push the
equipment directly toward the operator, or that pull the
equipment directly away from the operator. These forces
are the result of cutting on the sides of the blade. The
direction of the force depends on the side of the blade
being used, and the direction of blade rotation at the
point of contact. The reactive force is in the opposite
direction of blade rotation at the contact point,
regardless of where the contact is being made. These
types of reactive forces are also called “Blade Thrust.
As shown in the illustration, a blade turning
counterclockwise will cause the equipment to pull away
from the operator if the point of cutting resistance is on
the left side of the blade. If the point of cutting
resistance is on the right side of the blade, the
equipment will push back toward the operator. In both
examples, the reactive force is in the opposite direction
of blade rotation at the contact point where resistance
occurs.
Kickout
Kickout is also a reactive force caused by resistance to
cutting, but the direction of blade thrust is lateral (to the left or right of the
blade), instead of forward or back toward the operator. In most cases, Push,
Pull, and Kickout can be reduced or eliminated by:
• Using the correct blade for the cutting job
• Using properly sharpened blades
• Applying consistent, even force to the blade
during the cut
• Avoiding obstacles and ground hazards
• Using extra care when cutting harder
materials such as extremely dry brush,
saplings, and small trees
• Cutting from a stable, secure position
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