METABO W 850-100 (01) PDF Document

The METABO W 850-100 angle grinder, when fitted with original Metabo accessories, is suitable for grinding, sanding, separating, and wire brushing metal, concrete, stone, and similar materials without the use of water. The user bears sole responsibility for any damage caused by inappropriate use.

When using your METABO W 850-100, always adhere to the following safety instructions:

Personal Protective Equipment (PPE):

Wear personal protective equipment. Depending on the application, use a face shield, safety goggles, or safety glasses. As appropriate, wear a dust mask, hearing protectors, gloves, and a workshop apron capable of stopping small abrasive or workpiece fragments. The eye protection must be capable of stopping flying debris generated by various applications. Prolonged exposure to high-intensity noise may cause hearing loss.

Work Area Safety:

Keep bystanders a safe distance away from the work area. Anyone entering the work area must wear personal protective equipment. Fragments of the workpiece or of a broken accessory may fly away and cause injury beyond the immediate area of operation.

Electrical Safety:

Hold the power tool by insulated gripping surfaces only when performing an operation where the cutting accessory may contact hidden wiring or its own cord. Contact with a “live” wire will also make exposed metal parts of the power tool “live” and could give the operator an electric shock.

General Operation:

Do not use a damaged accessory. Before each use, inspect accessories such as abrasive wheels for chips and cracks, backing pads for cracks, tear, or excess wear, and wire brushes for loose or cracked wires. If the power tool or accessory is dropped, inspect for damage or install an undamaged accessory.

After inspecting and installing an accessory, position yourself and bystanders away from the plane of the rotating accessory and run the power tool at maximum no-load speed for one minute. Damaged accessories will normally break apart during this test time.

Do not operate the power tool near flammable materials. Sparks could ignite these materials.

Do not use accessories that require liquid coolants. Using water or other liquid coolants may result in electrocution or shock.

Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to cause cancer, birth defects, or other reproductive harm. To reduce your exposure to these chemicals:

Work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

Observe the relevant guidelines and national regulations for your material, staff, application, and place of application.

Collect the particles generated at the source; avoid deposits in the surrounding area.

Use suitable accessories for special work to prevent particles from entering the environment in an uncontrolled manner.

Use a suitable extraction unit.

Reduce dust exposure with the following measures:

– Do not direct the escaping particles and the exhaust air stream towards yourself, nearby persons, or dust deposits.

– Use an extraction unit and/or an air purifier.

– Ensure good ventilation of the workplace and keep it clean using a vacuum cleaner. Sweeping or blowing stirs up dust.

– Vacuum or wash protective clothing. Do not blow, beat, or brush protective gear.

Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush, or any other accessory. Pinching or snagging causes rapid stalling of the rotating accessory, which in turn causes the uncontrolled power tool to be forced in the direction opposite of the accessory’s rotation at the point of the binding. Kickback is the result of power tool misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below:

a) Maintain a firm grip with both hands on the power tool and position your body and arms to allow you to resist kickback forces. Always use the auxiliary handle, if provided, for maximum control over kickback or torque reaction during start-up.

b) Never place your hand near the rotating accessory. The accessory may kick back over your hand.

c) Do not position your body in the area where the power tool will move if kickback occurs. Kickback will propel the tool in a direction opposite to the wheel’s movement at the point of snagging.

d) Use special care when working corners, sharp edges, etc. Avoid bouncing and snagging the accessory. Corners, sharp edges, or bouncing have a tendency to snag the rotating accessory and cause loss of control or kickback.

e) Do not attach a saw chain woodcarving blade, a segmented diamond wheel with a peripheral gap greater than 10 mm, or a toothed saw blade. Such blades create frequent kickback and loss of control.

Grinding and Cutting-Off Operations:

a) Use only wheel types that are specified for your power tool and the specific guard designed for the selected wheel. Wheels for which the power tool was not designed cannot be adequately guarded and are unsafe.

b) The grinding surface of center-depressed wheels must be mounted below the plane of the guard lip. An improperly mounted wheel that projects through the plane of the guard lip cannot be adequately protected.

c) The guard must be securely attached to the power tool and positioned for maximum safety, so the least amount of wheel is exposed towards the operator.

d) Wheels must be used only for specified applications. For example: do not grind with the side of a cut-off wheel. Abrasive cut-off wheels are intended for peripheral grinding; side forces applied to these wheels may cause them to shatter.

e) Always use undamaged wheel flanges that are of the correct size and shape for your selected wheel. Proper wheel flanges support the wheel, thus reducing the possibility of wheel breakage.

f) Do not use worn-down wheels from larger power tools. A wheel intended for a larger power tool is not suitable for the higher speed of a smaller tool and may burst.

Additional Cutting-Off Operations Warnings:

a) Do not “jam” the cut-off wheel or apply excessive pressure. Do not attempt to make an excessively deep cut.

b) Do not position your body in line with and behind the rotating wheel. When the wheel, at the point of operation, is moving away from your body, the possible kickback may propel the spinning wheel and the power tool directly at you.

c) When the wheel is binding or when interrupting a cut for any reason, switch off the power tool and hold it motionless until the wheel comes to a complete stop. Never attempt to remove the cut-off wheel from the cut while the wheel is in motion; otherwise, kickback may occur.

d) Do not restart the cutting operation in the workpiece. Let the wheel reach full speed and carefully re-enter the cut.

e) Support panels or any oversized workpiece to minimize the risk of wheel pinching and kickback. Large workpieces tend to sag under their own weight.

f) Use extra caution when making a “pocket cut” into existing walls or other blind areas. The protruding wheel may cut gas or water pipes, electrical wiring, or objects that can cause kickback.

Before commissioning your METABO W 850-100, check that the rated mains voltage and mains frequency stated on the type plate match your power supply. It is recommended to always install an upstream GFCI with a maximum trip current of 30 mA.

Attaching the additional handle: Always work with the additional handle (10) attached. Attach the additional handle on the left or right of the machine and secure it.

Attaching the safety guard (for W 850-100): For safety reasons, only use the guard provided for the respective accessory. See illustration C on the provided PDF.

1. Loosen the clamping screw (16) until the clamping ring (17) on the safety guard expands sufficiently.

2. Place the safety guard (11) in the position indicated.

3. Turn the safety guard until the closed section is facing the operator.

4. Tighten the clamping screw (16) firmly. Make sure that the guard is seated securely; you should not be able to turn the safety guard (11).

Use only accessories that are covered by at least 3.4 mm by the safety guard.

Prior to any conversion work, pull the mains plug out of the socket. The machine must be switched off and the spindle at a standstill.

1. Locking the spindle:

Press in the spindle locking button (4) and turn the spindle (3) by hand until the spindle locking button engages.

2. Placing the grinding wheel in position:

See illustration A in the provided PDF.

– Fit the support flange (2) on the spindle. The flange should not turn on the spindle when properly attached.

– For the W…-100 model: Screw the support flange with a two-hole spanner onto the spindle so that the small collar (with a diameter of 16 mm) is facing upwards.

– Place the grinding wheel on the support flange (2). The grinding wheel must lay flat on the supporting flange.

3. Securing/Releasing the 2-hole nut:

The 2 sides of the two-hole nut are different. Screw the two-hole nut onto the spindle as follows (See illustration B):

– X) For thin grinding discs: The edge of the 2-hole nut (12) faces upwards so that the thin grinding disc can be attached securely.

– Y) For thick grinding discs: The edge of the two-hole nut (12) faces downwards so that the two-hole nut can be attached securely to the spindle.

– Z) Only for W…-100: The collar of the two-hole nut faces downwards and/or the flat surface faces upwards.

– Lock the spindle. Turn the two-hole nut (12) clockwise using the two-hole spanner (13) to secure.

To release the 2-hole nut, lock the spindle and turn the two-hole nut (12) anticlockwise using the two-hole spanner (13) to unscrew.

Always guide the METABO W 850-100 with both hands. Switch on first, then guide the accessory towards the workpiece.

For models with a slide switch:

– Switching on: push the slide switch (5) forwards. For continuous operation, tilt it downwards until it engages.

– Switching off: press the rear end of the slide switch (5) and release it.

For models with a paddle switch (with deadman function, designation WP…):

– Switching on: Slide the switch-on lock (9) in the direction of the arrow and press the trigger (8).

– Switching off: Release the trigger switch (8).

Avoid inadvertent starts: always switch the tool off when the plug is removed from the mains socket or if there has been a power cut.

Grinding and sanding operations:

Press down the machine evenly on the surface and move it back and forth so that the surface of the workpiece does not become too hot.

For rough grinding, position the machine at an angle of 30° – 40° for the best working results.

Cut-off grinding:

Always work against the run of the disc. Otherwise, the machine may kick back from the cut in an out-of-control manner. Guide the machine evenly at a speed suitable for the material being processed. Do not tilt, apply excessive force, or sway from side to side.

Wire brushing:

Press down the machine evenly.

Particles may become deposited inside the power tool during operation, which impairs the cooling. Conductive build-up can impair the protective insulation and create an electrical hazard.

The power tool should be cleaned regularly, often, and thoroughly through all front and rear air vents using a vacuum cleaner or by blowing in dry air. Prior to this operation, separate the power tool from the power source and wear protective glasses and a suitable dust mask. Ensure appropriate suction is available when blowing out vents.

If your METABO W 850-100 fails to start, it may be due to the restart protection feature being active. If the mains plug is inserted with the machine switched on, or if the power supply is restored following an interruption, the machine will not start up. To resolve this, switch the machine off and then back on again.

Note: These technical specifications are subject to tolerances in compliance with relevant valid standards.