METABO HPT MFE 40 (01) PDF Document

The METABO HPT MFE 40 wall chaser is designed for cutting or slitting channels (chasing) in primarily mineral-based materials such as reinforced concrete, masonry, and paving, while firmly supported on a level surface, without water.

Key points for use:

• Do not use bonded abrasive cut-off wheels or grinding discs. Use only diamond cut-off wheels.

• Materials that generate dusts or vapours that may be harmful to health must not be processed.

• The user bears sole responsibility for any damage caused by inappropriate use.

• Generally accepted accident prevention regulations and the enclosed safety information must be observed.

The following are the technical specifications for the METABO HPT MFE 40, Serial-Number: 46040..

Emission Values:

These values make it possible to assess the emissions from the power tool and to compare different power tools. The actual load may be higher or lower depending on the operating conditions, the condition of the power tool or the accessories. Please allow for breaks and periods when the load is lower for assessment purposes. Arrange protective measures for the user, such as organizational measures based on the adjusted estimates.

Sound Levels:

The noise level can exceed 80 dB(A) during operation. Always wear ear protectors!

The main components of the METABO HPT MFE 40 are as follows:

1. Lock

2. Trigger

3. Scale for depth of cut

4. Clamping lever for setting cutting depth

5. Electronic signal indicator

6. Marking (serves as cutting indicator of the first diamond disc)

7. Spindle locking button

8. Extraction nozzle for dust extraction

9. Support wheels

10. Markings showing the cutting edges of the diamond cutting discs with maximum cutting depth

11. Arrow showing the specified thrust direction

12. First handle

13. Second handle

14. 2-hole spanner

15. Safety cover

16. Arrows showing the direction of rotation of the diamond cutting discs

17. Clamping nut

18. Diamond cutting disc

19. Clamping flange

20. Spacer rings

The symbols on the METABO HPT MFE 40 have the following meanings:

• □: Class II Construction

• V: volts

• A: amperes

• Hz: hertz

• ~: alternating current

• n: rated speed

• ../min: revolutions per minute

• rpm: revolutions per minute

1. Mains Connection:

Before commissioning, check that the rated mains voltage and frequency on the type plate match your power supply. Always install an RCD / GFCI with a maximum trip current of 30 mA upstream. Pay attention to a possibly short feed line and a large line cross-section of the mains cable.

2. Use/Change Diamond Cut-off Wheels and Set Groove Width:

Switch off the machine and disconnect the mains plug. Caution! Never press the locking button (7) when the machine is running or slowing down.

Step 1. Set the maximum cutting depth (see next section).

Step 2. Press the spindle locking button (7) and rotate the front diamond cut-off wheel (18) slowly until the button engages.

Step 3. With the button pressed, unscrew the clamping nut (17) with the supplied 2-hole spanner (anti-clockwise).

Step 4. Arrange the spacer rings (20) and diamond cut-off wheels according to the desired groove width. The clamping flange (19) must always be fitted onto the spindle with the sheath facing out. Ensure the diamond wheels are fitted with the correct direction of rotation, as indicated by arrows (16) on the wheels and the guard (15).

Step 5. Lock the spindle by pressing the spindle locking button (7) and tighten the clamping nut (17) with the two-hole wrench (14) (clockwise direction).

Step 6. Carry out a test run. Set minimum cutting depth. Position yourself away from the plane of the rotating wheel and run the power tool at maximum no-load speed for one minute. Stop immediately if significant vibrations occur.

3. Setting Cutting Depth:

Undo the clamping lever (4) and set the desired cutting depth using the scale (3). Retighten the clamping lever (4). If required, the position of the clamping lever can be changed by pulling it out, turning it, and lowering it again.

4. Attaching Dust Extraction:

Caution! Never work without a dust extraction device as dusts can be harmful to health and the motor can quickly choke on stone dust. Use a suitable Metabo HPT vacuum cleaner and anti-static suction hoses. To extract stone dust, put the suction hose onto the extraction nozzle (8).

Switching On and Off:

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 or if there has been a power cut.

• Torque activation (momentary): Slide the lock (1) in the direction of the arrow and press the trigger switch (2). To switch off, release the trigger switch (2).

• Continuous operation: Slide the lock (1), press the trigger switch (2) and keep it pressed. Then slide the lock (1) once more to lock the trigger switch (2). To switch off, press the trigger switch (2) and release.

Working with the Wall Chaser:

Step 1. Always guide the machine with both hands on the handles (12) and (13).

Step 2. Use the markings (6) on the guard as a cutting indicator. These markings are in the extension of the rear diamond cutting disc.

Step 3. Place the wall chaser (with the motor switched on) with the support wheels (9) on the surface to be cut.

Step 4. Slowly guide the tool down until the set cutting depth has been reached.

Step 5. Push the machine in the cutting direction, as indicated by the arrow (11) on the guard. Always push the machine in the stipulated direction through the material.

Step 6. Once the groove is complete, switch off the tool and hold it steady until the diamond cut-off wheel comes to a complete stop. Never attempt to remove the cutting disc from the cut while the wheel is in motion, as kickback may occur.

Step 7. Remove the machine from the cut and put it down on its side. The remaining strip between the two chases can be removed with the provided chase extraction chisel.

Note: Grooves of greater depth cannot be cut into hard material (e.g., cement) in one movement.

Significantly reduced work progress and increased feed force are signs of blunt diamond cut-off wheels. To sharpen blunt diamond cut-off wheels, carry out short cuts into abrasive materials such as sand-lime brick.

Particles can deposit inside the power tool during operation, which impairs cooling. The power tool should be cleaned regularly, often, and thoroughly through all front and rear air vents using a vacuum cleaner. Before cleaning, separate the power tool from the power source and wear protective goggles and a dust mask.

Safety Clutch:

The METABO HPT MFE 40 has an automatic safety coupling built into the gears. This protects the operator from high torque if a diamond cut-off wheel is canted during work. If the safety coupling engages, immediately switch the motor off and do not allow the coupling to drag.

Electronic Overload Indicator:

If the electronic signal indicator (5) is on, the load on the machine is too high. Reduce the feed pressure until the electronic signal indicator goes off.

Troubleshooting (Machine does not start):

If the machine does not start and the electronic signal indicator (5) flashes, the restart protection is active. This occurs if the mains plug is inserted with the machine switched on or if power is restored after an interruption. To resolve this, switch the machine off and back on again.

Use only genuine Metabo HPT accessories that fulfill the requirements and specifications listed in the operating instructions.

Metabo HPT diamond cut-off wheels: (Ø 125 mm, laser-welded, suitable for dry cutting, bore = 22.2 mm)

• For hard and medium-hard materials (e.g., concrete, including reinforced concrete): Order number 6.24541

• For abrasive materials (e.g., abrasive cement, sandstone, sand-lime brick, aerated concrete and similar): Order number 6.24641

Metabo HPT cutting wheels:

• Diamond cutting wheel Dia FS2 UP: Order number 6.28298

• Diamond cutting wheel Dia FS3 UP: Order number 6.28299

The generated grinding dust may contain harmful substances. Do not dispose of it with household trash; dispose of it properly at a collection point for hazardous waste.

Observe the national regulations on environmentally compatible disposal and on the recycling of disused tools, packaging, and accessories.

Work Area Safety:

• Keep work area clean and well lit.

• Do not operate in explosive atmospheres (e.g., near flammable liquids, gases, or dust).

• Keep children and bystanders away while operating.

Electrical Safety:

• Power tool plugs must match the outlet. Never modify the plug.

• Avoid body contact with earthed or grounded surfaces (pipes, radiators, etc.).

• Do not expose power tools to rain or wet conditions.

• Do not abuse the cord. Keep it away from heat, oil, sharp edges, or moving parts.

• When operating outdoors, use an extension cord suitable for outdoor use.

• If operating in a damp location is unavoidable, use a residual current device (RCD) protected supply.

Personal Safety:

• Stay alert and use common sense. Do not use while tired or under the influence of drugs, alcohol, or medication.

• Use personal protective equipment (PPE), such as eye protection, dust mask, non-skid safety shoes, hard hat, or hearing protection.

• Prevent unintentional starting. Ensure the switch is in the off-position before connecting to a power source.

• Remove any adjusting key or wrench before turning the tool on.

• Do not overreach. Keep proper footing and balance.

• Dress properly. Do not wear loose clothing or jewelry. Keep hair and clothing away from moving parts.

• If dust extraction devices are provided, ensure they are connected and properly used.

Power Tool Use and Care:

• Do not force the power tool. Use the correct tool for your application.

• Do not use the tool if the switch does not turn it on and off.

• Disconnect the plug before making adjustments, changing accessories, or storing.

• Store idle tools out of the reach of children.

• Maintain power tools. Check for misalignment, binding, or breakage of parts.

• Keep cutting tools sharp and clean.

• Use the tool, accessories, and bits in accordance with instructions, considering the work to be performed.

Service:

• Have your power tool serviced by a qualified repair person using only identical replacement parts.

• The guard provided with the tool must be securely attached and positioned for maximum safety, so the least amount of wheel is exposed towards the operator.

• Use only bonded reinforced or diamond cut-off wheels for your power tool.

• The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool.

• Wheels must be used only for recommended applications. For example, do not grind with the side of a cut-off wheel.

• Always use undamaged wheel flanges that are of the correct diameter for your selected wheel.

• The outside diameter and thickness of your accessory must be within the capacity rating of your power tool.

• The arbour size of wheels and flanges must properly fit the spindle of the power tool.

• Do not use damaged wheels. Before each use, inspect wheels for chips and cracks.

• 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 shop apron.

• Keep bystanders a safe distance away from the work area.

• Hold the power tool by insulated gripping surfaces only, when performing an operation where the cutting accessory may contact hidden wiring.

• Position the cord clear of the spinning accessory.

• Never lay the power tool down until the accessory has come to a complete stop.

• Do not run the power tool while carrying it at your side.

• Regularly clean the power tool’s air vents.

• Do not operate the power tool near flammable materials.

• Do not use accessories that require liquid coolants.

Kickback is a sudden reaction to a pinched or snagged rotating wheel, which causes the uncontrolled power tool to be forced in the direction opposite of the wheel’s rotation. It can be avoided by taking proper precautions:

• Maintain a firm grip on the power tool and position your body and arm to allow you to resist kickback forces. Always use the auxiliary handle, if provided.

• Never place your hand near the rotating accessory.

• Do not position your body in line with the rotating wheel.

• Use special care when working corners, sharp edges, etc. Avoid bouncing and snagging the accessory.

• Do not attach a saw chain, woodcarving blade, segmented diamond wheel with a peripheral gap greater than 10 mm, or a toothed saw blade.

• Do not “jam” the wheel or apply excessive pressure. Do not attempt to make an excessive depth of cut.

• When a wheel is binding or when interrupting a cut, switch off the power tool and hold it motionless until the wheel comes to a complete stop. Never attempt to remove the wheel from the cut while it is in motion.

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

• Support panels or any oversized workpiece to minimize the risk of wheel pinching and kickback.

• Use extra caution when making a “pocket cut” into existing walls or other blind areas.

• Always wear protective goggles.

• Wear a suitable dust protection mask.

• Use only diamond cut-off wheels. Do not use bonded discs.

• Always operate with two hands.

• Always push the machine in the stipulated direction through the material to be processed, as indicated by the arrow (11) on the guard. The wheel may bind, walk up, or kickback if the power tool is restarted in the workpiece.

• Ensure the place where you wish to work is free of power cables, gas lines, or water pipes (e.g., check using a metal detector).

• The workpiece must lay flat and be secured against slipping, e.g., using clamps.

• The diamond cut-off wheels must fit without play in relation to the support flange. Do not use adapters or reducers.

• Ensure the sparks emitted during use do not pose any risk and are not able to ignite inflammable substances.

• The diamond cut-off wheels continue running after the machine has been switched off.

• Avoid damage to gas or water pipes, electrical cables, and load-bearing walls.

• Pull the plug out of the socket before making any adjustments, converting, or servicing the machine.

• A damaged or cracked side handle or safety guard must be replaced. Never operate the machine with a defective side handle or guard.

Yes. According to the State of California, 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. Examples of these chemicals include:

• Lead from lead-based paints.

• Crystalline silica from bricks and cement and other masonry products.

• Arsenic and chromium from chemically-treated lumber.

Your risk from these exposures varies depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well-ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.