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Die grinders can generate unexpected movement.
Keep a firm grip on the tool at all times. Be sure your body position allows you to have control of the tool at
all times. Make sure your footing is secure. When possible, secure the work piece in a vice or with clamps.
Unexpected tool movement can cause injury.
Using excessive force on a tool makes it hard to control.
Do not force tool.
Hard to control tool can cause injury.
Taping or wiring the throttle valve in the “ON” position will prevent the tool from shutting off if the tool should jam or
malfunction or if anything unexpected happens.
Do not wire or tape down the “On-Off” valve of any power tool.
Tools that are prevented from shutting off can cause injury.
Poorly maintained and lubricated tools can fail unexpectedly.
Keep tool properly lubricated and in good repair at all times. Use only Sioux Air Motor Oil No. 288. See the
tool’s information sheet to find out what other greases and oils to use. Do not drop the end of the hose
on the floor where it will pick up dirt and transport it into the tool. See information sheet for any additional
maintenance requirements.
Unexpected tool failures can cause injury.
Damaged grinding wheels can explode.
Check the wheel for damage before mounting, such as chips and cracks. Handle wheels carefully to
avoid dropping or bumping. Protect wheels from extremes of temperature and humidity. Check wheels
immediately after any unusual occurrence that may damage wheels. Check wheels daily. Hold tool under
bench or provide other protection when starting up a new wheel, a used wheel that has been remounted, or
at the beginning of an operation. Run at operating speed in this protected area for at least one minute before
applying to the work. No one shall stand in front of or in line with the wheel during this test.
Exploding wheels can cause serious injury or death.
Collets, nuts and related equipment in poor shape or not the proper ones for the wheel or tool used can cause
wheels to malfunction. Grinding wheels not properly tightened can spin off.
Be certain that all collets, nuts and related equipment are in good shape, the proper ones for the type and
size of wheel being used, and are securely fastened. Tighten collet securely. Match wheel or accessory shaft
diameter to chuck or collet.
Grinding wheels that malfunction and spin off can cause injury.
Air hoses can come loose from power tools and whip.
Inspect and do not use tools with loose or damaged air hoses or fittings.
Whipping air hoses can cause injury.
Abnormal sounding or excessively vibrating grinders can indicate a hazard that could cause wheel to explode.
If the normal sound of the grinder changes, or if it vibrates excessively, shut it off immediately, remove the
wheel, and check speed with tachometer. Tool could be overspeeding or the wheel could be damaged or not
mounted properly.
Exploding wheels can cause injury or death.
Air hoses that are not oil resistant or are not rated for the working pressure can burst.
Make sure that all air hoses are oil resistant and rated for the working pressure.
Air hoses that burst can cause injury.
Tools not operated at proper air pressure can operate erratically.
Do not exceed a maximum air pressure of 90 psig/6.2 bar or as stated on the tool’s nameplate or operating
instructions. Use an air regulator to maintain proper air pressure.
Erratic operation in power tools can cause injury.
Improperly repaired tools perform unpredictably.
Repair tools at an Authorized Sioux Service Center.
Tools that perform unpredictably can cause injury.
Tools left connected to the air supply can start unexpectedly.
Always remove tool from air supply and activate trigger to bleed air line before making any adjustments,
changing accessories, or doing any maintenance or service on tool. Make it a habit to check to see that all
adjusting keys and wrenches have been removed from tool before turning it on.
Tools starting unexpectedly and flying keys and wrenches can cause injury.
Working in poorly lit areas makes it hard to see hazards.
Keep work area well lit.
Poorly lit work areas can cause injury.
Children are attracted to work areas.
Keep children away. All visitors must keep a safe distance away from work area.
Children in work areas can be injured.
Unauthorized or untrained personnel can misuse unattended tools.
Store idle tools in a dry, high or locked-up place, out of the reach of children.
Misused tools can cause injury.
Tools with the actuator left in the “ON” position when an unexpected air pressure loss occurs can start unexpectedly
when the air pressure is restored.
Release the actuator if an unexpected loss of air pressure occurs.
Unexpected tool starts can cause injury.
