Global Machinery Company MPS184M User Manual

Page 6

Causes and operator prevention of kickback:

•

Kickback is a sudden reaction to a pinched, bound or

misaligned saw blade, causing an uncontrolled saw to

lift up and out of the workpiece toward the operator;

•

When the blade is pinched or bound tightly by the kerf

closing down, the blade stalls and the motor reaction

drives the unit rapidly back toward the operator;

•

If the blade becomes twisted or misaligned in the cut, the

teeth at the back edge of the blade can dig into the top

surface of the wood causing the blade to climb out of the

kerf and jump back toward the operator.

Kickback is the result of saw misuse and/or incorrect

operating procedures or conditions and can be avoided by

taking proper precautions as given below.

Maintain a firm grip with both hands on the saw and

position your arms to resist kickback forces.

Position

your body to either side of the blade, but not in line

with the blade. Kickback could cause the saw to jump

backwards, but kickback forces can be controlled by the

operator, if proper precautions are taken.

When blade is binding, or when interrupting a cut

for any reason, release the trigger and hold the saw

motionless in the material until the blade comes to

a complete stop.

Never attempt to remove the saw

from the work or pull the saw backward while the blade

is in motion or kickback may occur. Investigate and take

corrective actions to eliminate the cause of blade binding.

When restarting a saw in the workpiece, centre the

saw blade in the kerf and check that saw teeth are

not engaged into the material.

If saw blade is binding,

it may walk up or kickback from the workpiece as the

saw is restarted.

Support large panels to minimise the risk of blade

pinching and kickback.

Large panels tend to sag under

their own weight. Supports must be placed under the

panel on both sides, near the line of cut and near the

edge of the panel.

Do not use dull or damaged blades.

Unsharpened

or improperly set blades produce narrow kerf causing

excessive friction, blade binding and kickback.

Blade depth and bevel adjusting locking levers

must be tight and secure before making cut.

If blade adjustment shifts while cutting, it may cause

binding and kickback.

Use extra caution when making a “plunge cut” into

existing walls or other blind areas.

The protruding

blade may cut objects that can cause kickback.

The protruding blade may cut objects that can

cause kickback.
a.

Check lower guard for proper closing before each

use.

Do not operate the saw if lower guard does not

move freely and close instantly. Never clamp or tie the

lower guard into the open position. If saw is accidentally

dropped, lower guard may be bent. Raise the lower guard

with the retracting handle and make sure it moves freely

and does not touch the blade or any other part, in all

angles and depths of cut.

Check the operation of the lower guard spring.

If the

guard and the spring are not operating properly, they

must be serviced before use. Lower guard may operate

sluggishly due to damaged parts, gummy deposits, or a

build-up of debris.

Lower guard should be retracted manually only for

special cuts such as “plunge cuts” and “compound

cuts.”

Raise lower guard by retracting handle and as

soon as blade enters the material, the lower guard must

be released. For all other sawing, the lower guard should

operate automatically.

Always observe that the lower guard is covering

the blade before placing saw down on bench or

floor.

An unprotected, coasting blade will cause the

saw to walk backwards, cutting whatever is in its path.

Be aware of the time it takes for the blade to stop after

switch is released.

e. Do not use abrasive wheels.