METABO W 850-115 (01) PDF Document

The METABO W 850-115 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.

Before commissioning your METABO W 850-115, follow these steps:

1. Check that the rated mains voltage and mains frequency stated on the type plate match your power supply.

2. Always install an upstream GFCI with a maximum trip current of 30 mA.

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

To attach the safety guard on your METABO W 850-115, follow these steps:

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 in the manual’s illustrations.

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).

Note: For safety reasons, only use the guard provided for the respective accessory. Using an incorrect guard can lead to loss of control and serious injuries. Also, use only accessories that are covered by at least 3.4 mm by the safety guard.

Before any conversion work, pull the mains plug out of the socket. The machine must be switched off and the spindle at a standstill. For safety, attach the cut-off grinding guard before performing cut-off grinding work.

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:

Step 1. Fit the support flange (2) on the spindle. The flange should not turn on the spindle when properly attached.

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

Securing the 2-hole nut (12):

The 2 sides of the two-hole nut are different. Screw the two-hole nut onto the spindle as follows:

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

• 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.

After positioning the nut, lock the spindle. Turn the two-hole nut (12) clockwise using the two-hole spanner (13) to secure.

Releasing the 2-hole nut:

Lock the spindle (see chapter 7.1). Turn the two-hole nut (12) anticlockwise using the two-hole spanner (13) to unscrew.

For METABO W 850-115 models with speed control (WEV 850-115, WEV 850-125), set the recommended speed using the thumbwheel (7). A lower number corresponds to a lower speed, and a higher number to a higher speed.

Recommended speeds for different applications:

• Cutting disc, roughing disc, cup wheel and diamond cutting disc: high speed

• Brush: medium speed

• Sanding plate: low to medium speed

Note: It is recommended to use an angle polisher for polishing work.

Always guide the machine with both hands. Switch it on first, then guide the accessory towards the workpiece. Avoid inadvertent starts by always switching the tool off when the plug is removed from the mains socket or if there has been a power cut.

For machines 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 machines 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).

• 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, impairing its 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 850-115 does not start, it may be due to the restart protection 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.

This issue applies to WEV 850-115, WEV 850-125, and WEQ 1400-125 models only. If the speed drops while the machine is under load, it indicates that there is too much load on the machine. To fix this, allow the machine to run at idle speed until it has cooled down.

For your METABO W 850-115, always use the suitable accessory and the prescribed guard for the matching application. Only use accessories which fulfill the requirements and specifications listed in the operating instructions.

Applications and Accessories:

• Surface grinding: Grinding wheel, cup wheel (ceramic), diamond cup wheel

• Cut-off grinding: Cut-off wheel (metal, masonry/concrete), diamond cutting disc, dual-purpose diamond cutting disc

• Drilling of holes: Diamond drill bits

• Wire brushes: Wheel brush, cup brush

• Grinding with sanding paper: Flap disc, backing pad for sanding sheets

Prescribed Guards:

Explanatory notes:

Ø = max. diameter of the accessory

tmax,1 = max. permitted thickness of the clamping shank on accessory when using two-hole nut (12)

tmax,2 = max. permitted thickness of clamping shank on accessory when using “M-Quick” clamping nut (1)

tmax,3 = max. permitted thickness of clamping shank on accessory when using (tool-free) clamping nut (14)

tmax,4 = roughing disc/cutting disc: max. permitted thickness of accessory

tmax,5 = max. permitted thickness of wheel-type wire brushes

M = Spindle thread

l = Length of the sanding spindle

n0* = No-load speed (maximum speed)

nV* = No-load speed (adjustable)

P1 = Rated input power

P2 = Power output

m = Weight without mains cable

The technical specifications quoted are subject to tolerances (in compliance with relevant valid standards).