Metabo MAG 32, MAG 50 - Magnetic Core Drill Manual

Specified Use

The MAG 32 and MAG 50 are suitable for core drilling with suitable cutting tools and for drilling with spiral drills in metal. MAG 50 is also suitable for thread tapping.

The magnetic drill stand is designed for fastening to a magnetisable, even metal surface and must therefore have perfect adhesion. When used with the securing strap provided, it is suitable for working on vertical and angled surfaces and overhead.

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

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

General safety instructions

Reading the operating instructions will reduce the risk of injury.

Read all safety warnings and instructions. Failure to follow all safety warnings and instructions may result in electric shock, fire and/or serious injury.

Keep all safety instructions and information for future reference.
Before using the power tool, carefully read through and familiarise yourself with all the enclosed safety information and the Operating Instructions. Keep all enclosed documentation for future reference, and pass on your power tool only together with this documentation.

Special Safety Instructions

For your own protection and for the protection of your power tool, pay attention to all parts of the text that are marked with this symbol!

For work carried out on angled and vertical surfaces and overhead, the magnetic drill stand must be secured with the securing strap supplied to prevent it from falling if the power supply is interrupted.

When the magnet is switched off, or if the power supply is interrupted, the magnet loses it holding power. The machine executes a dangerous swinging movement.

Always wear a hard hat when working overhead.

Always wear protective goggles, gloves, and suitable shoes when working.

Ensure there is no damage to the mains connection cables, switch and anti-kink device.

Arc welding on the workpiece on which the machine is used is prohibited.

If a change in normal operation is detected (e.g. motor starts when magnet (switch (19)) is switched on: do not use the machine but have it repaired. Further faults can occur.

The magnet produces magnetic and electromagnetic fields that can have a negative effect on medical implants.

The surface for the electromagnet must be clean and flat.

The magnet holding power depends on material thickness and condition.

Paint, zinc and oxide layers reduce the magnet holding power.

Do not expose the machine to rain and do not use in wet or potentially explosive rooms.

Disconnect the mains plug from the plug socket before performing any adjustments or maintenance on the machine. Caution! When you unplug the mains plug, the magnet loses its holding power.

If (after use) the magnetic drill stand is placed on a material with low heat-dissipation characteristics for a long period (e.g. plastic), the magnet must not be switched on because this could lead to overheating of the magnetic coils.

Follow the instructions for lubrication and tool replacement.

Keep the handles dry, clean and free of oil and grease.

The use of other tools and accessories can result in a risk of injury.

Use the handle (4) on the magnetic drill stand when transporting the machine.

Always wear a safety harness when working on scaffolds.

Wear ear protectors.

Wear protective goggles.

Danger - electrical voltage.

Danger - magnetic field.

Persons with pacemakers prohibited.

Overview

1. Securing strap
2. Ratchet on securing strap
3. Two holding points
4. Handle
5. M8 thread (a ring bolt can be screwed in here. Used for lifting the machine with a carabiner and rope)
6. Container for cooling lubrication unit
7. Supply cock on cooling lubrication unit
8. Lock switch to prevent the machine from moving up/down accidentally
9. Threaded pins for adjusting backlash of the side plate
10. Slot in machine neck for driving out tools *
11. Removal tool *
12. Drill spindle with tool attachment (MK 2) *
13. Setting wheel (speed adjustment) *
14. Electronic signal indicator *
15. Thumbwheel (1st /2nd gear) *
16. Slide plate
17. Lever for moving driving unit up and down
18. Switch (LED lamp on/off)
19. Switch (switching on/off magnet)
20. Switch (switch on driving unit, clockwise, drill)
21. Switch (switching off driving unit)
22. Switch (switch on driving unit, counterclockwise) *
23. Magnet block/Magnet
24. Guard plate
25. Tool holder threaded pins*
26. Tool holder (Weldon, 19 mm) *
27. Anti-twist device*

* depending on fittings/model

Initial Operation

Before plugging in the device, check that the rated mains voltage and mains frequency, as specified on the rating label, match your power supply.

Check the machine for possible damage:
Before using the machine, you must carefully check protective devices or slightly damaged components to ensure they are operating perfectly and as intended. Check that moving parts are in perfect working order and do not jam and check whether parts are damaged. All parts must be correctly installed and fulfill all conditions necessary to ensure perfect operation of the grinder. Damaged protective devices and parts must be repaired or replaced according to specifications by an authorised specialist workshop.

Mains connection

The machine is in protection class I and must therefore only be connected to sockets earthed according to specifications.

Connect a FI circuit-breaker with max. release current (30 mA) upstream when using the machine outdoors!

Regularly check the power cable on the power tool and have it repaired by an approved expert if damaged.

If an extension cord is needed, it must be a three-core lead with a protective (earth) contactor that is properly connected to both the plug and the coupler of the cord.

When working outdoors, only use the correspondingly marked extension cable approved for this purpose.

Regularly check extension cables and replace if damaged.

Extension cables must be suitable for the driving unit and magnetic drill stand power ratings (see Technical Specifications). If using a roll of cable, always roll up the cable completely.

Use

Attaching the Securing Strap

For drilling work carried out on angled and vertical surfaces and overhead, the magnetic drill must be secured with the securing strap (1) supplied to prevent it from falling if the power supply is interrupted.

Fit the securing strap (1) so that the magnetic drill stand is moved away from the operator if the mains voltage fails.

Replace the securing strap (1) if it has had to catch a falling magnetic drill stand.

Check the securing strap (1) for damage. Before using the securing strap (1), always check it carefully to ensure it is operating faultlessly and as specified. If the securing strap (1) is damaged or if the ratchet (2) is no longer working properly, replace the securing strap immediately.

• Fit the securing strap (1) on one of the two holding points (3) of the magnetic drill stand.
  
• Then secure the securing strap to another suitable fastening point or to the material being processed.
• Notes on the securing strap (1):
  Insert the free end of the securing strap (1) from below through the opening in the ratchet shaft and then tension the free end of the securing strap until it is loosely fitted.
  The strap must not be tightly fitted: you must be able to unroll the securing strap by more than one rotation about the ratchet shaft - This is essential to ensure secure fastening. Tension the securing strap with a pumping action on the ratchet lever (a).
  To loosen the securing strap:
  
  The tension is released in sudden bursts! To loosen the securing strap, open the ratchet fully and simultaneously use your finger to pull the locking strap (b) upward.
• Ensure that the securing strap is guided to be taut in position.
• Check that the strap connection is secure.

The securing strap does not replace the magnetic force of the magnetic drill stand: it is simply used to secure against falling in the event of a voltage failure.

Cooling Lubrication Unit for Core Drilling

The tool life depends on the lubrication. Lubricating the inside of the core drill bit with high-performance cutting oils is essential for core drilling.

To fill with oil, remove the container (6) from the magnetic drill stand.

Fill the container with high-performance cutting oil (6) and close the screw cap. Switch the lubrication on or off at the supply cock (7).

For work carried out on vertical and overhanging surfaces or overhead surfaces, the container (6) must be emptied or removed to prevent liquid from escaping (otherwise there is a risk of cutting oil entering the motor and causing a short-circuit). When carrying out this type of task, spray the inside of the cutting edge tool before drilling with universal cutting spray (see chapter Accessories). Repeat the process several times for larger drilling depths.

Set gear and rotational speed (MAG 50 only)

Two-speed gear box:

Do not activate the thumbwheel (15) until the motor has completely stopped.

Select the required gear by turning the thumbwheel (15). If necessary, you can aid the switching procedure by turning the drill spindle slightly.

Recommended setting:

• • = 2nd gear, high speed: Drilling in steel with a bit diameter of up to approx. 26 mm

• = 1st gear, high torque: Drilling in steel with a bit diameter larger than approx. 26 mm

Setting speed

Using the setting wheel, you can adjust the motor speed continuously (13) and thus adapt it to the material and working conditions.

Switching on/Switch-on Sequence, direction of rotation

For safety reasons, the driving unit can only be switched on after the magnet has been switched on. Please observe the switch-on sequence.

1. First switch on the magnet: set switch (19) to "I". When the magnet is switched on, the indicator lamp built into the switch (19) lights up.
2. Only then should the driving unit be switched on:
   Switch (20) = clockwise (for drilling)
   Switch (22) = counter-clockwise, MAG 50 only

See also chapter Troubleshooting.

Note: The full holding power of the magnet is available when the driving unit is switched on.

Switching off the Driving Unit

Press switch (21). Wait until the driving unit has come to a complete standstill.

Switching off magnet

When the magnet is switched off, the magnet loses its holding power.

Set switch (19) to "0".

Mounting on the Workpiece

To permit the magnetic drill stand to adhere properly to material that is to be drilled, the surface must be clean and smooth. Loose rust, dirt or grease must be removed before mounting the magnetic drill stand; any welding beads or surface irregularities must be smoothened. Clean the magnet block as well (23) if necessary.

After switching on the magnet, shake the handle (4) of the magnetic drill stand firmly to ensure that it is adhering perfectly to the material. If it is not, then check the condition of the surface of the material and that of the bottom of the magnet block. Clean as necessary and try again.

Use on thin steel

The unit adheres best to low-carbon steel that is at least 12 mm thick.

For drilling a hole into thin steel, a steel plate measuring at least 100 x 200 x 12 mm can be secured under the material at the place where the magnetic stand is to be positioned.

Non-ferrous metals

To drill a hole in non-ferrous metal, the steel plate should be secured on the surface of the material and the magnetic drill stand then placed on the steel plate.

Drilling

Disconnect the mains plug from the plug socket before performing any adjustments or maintenance on the machine. Caution! When you unplug the mains plug, the magnet loses its holding power.

Do not use deformed or damaged tools. Before use, always check tools such as core drills for deformities or damage.

Do not use accessories that have not been specified or recommended by Metabo for this machine. The ability to attach the accessory to your machine does not guarantee safe operation.

Securing or positioning a tool incorrectly can cause hazardous situations due to parts breaking or being blown off.

If a tool is blocked, switch off the driving unit immediately: Press switch (21). Remove the tool from the borehole.

General notes:

• Attach guard plate (24).
• Centre the position at which the hole is to be drilled.
• Align the magnetic drill stand so that the drill bit is above the centre marking. To do so, switch on the LED lamp at switch (18) if necessary.
• Switch on the magnet of the magnetic drill stand (set switch (19) to "I".).
• Depress (8) lock switch.
• Then switch on the driving unit: switch (20) = clockwise (for drilling) switch (22) = counter-clockwise, MAG 50 only
• If necessary, switch on the cooling lubrication unit (see chapter Cooling Lubrication Unit for Core Drilling)
• Start the drilling operation with minimum feeding force. When the drill bit has started to drill, slightly higher feeding force can be applied. Excessive feeding force leads to premature wear of the drill bit. Ensure that the chip flow is regular
• Use a wire hook to remove the chips.
• If the bored piece of metal is not automatically ejected from the core drill, remove it using a tool, e.g. with the wire hook.

If (after use) the magnetic drill stand is placed on a material with low heat-dissipation characteristics for a long period (e.g. plastic), the magnet must not be switched on because this could lead to overheating of the magnetic coils.

Special notes for tools with morse taper shank MK2 (only applies to MAG 50):

Inserting tool:

To prevent the driving unit from moving up/ down accidentally: pull out the lock switch (8).

The tool is only guaranteed to fit perfectly in the drill spindle (12) if the female taper of the drill spindle and the taper shank of the tool are free of dirt and grease.

Never use excessive force to press tools into the female taper of the drill spindle!

Always use sharp tools in perfect condition.

Switch off the machine. Pull the mains plug from the socket.

When you unplug the mains plug, the magnet loses its holding power.

Tools with a taper shank MK2 can be used directly in the female taper of the drill spindle (12).

Driving out the tool:

Insert the removal tool (11) - with the sloping edge against the tool - in the slot (10) on the machine neck. If the removal tool cannot be inserted through the drill spindle, you should turn the drill spindle (12) slightly by hand. Drive out the tool by knocking lightly on the removal tool with a hammer. (11)

Special notes on tools with Weldon shank 19 mm:

For MAG 50: First insert the industrial attachment 6.26602 (see chapter Accessories).

To prevent the driving unit from moving up/ down accidentally: pull out the lock switch (8).

When inserting the attachment, ensure that the side pin of the industrial attachment engages with the anti-twist device (27).

Then connect the hose from the cooling lubrication unit to the connecting piece on the industrial attachment 6.26602.

Inserting the tool:

• Insert the centering pin (of an appropriate length) into the tool.
• Insert the tool in the tool holder (26) so that both surfaces (on the cylindrical part of the tool) are located at the positions of the threaded pins (25).
• Guide the tool upwards as far as it will go (against the pressure of the integral spring) and tighten the threaded pins (25) using the Allen key.

Removing the tool:

• Release the two threaded pins (25).

Cleaning, Maintenance

Perform regular maintenance work, cleaning and lubrication.

Remove the mains plug from the socket before carrying out any settings, maintenance or repairs.

When you unplug the mains plug, the magnet loses its holding power.

For lubricating the rack and pinion that moves the slide plate (16) up and down, a few drops of oil should be applied occasionally to the rack.

Coat the sliding surfaces of the slide plate (16) with multi-purpose grease.

Backlash of the slide plate

The backlash of the side plate is set ex works.

The side plate (16) must be adjusted so that it can still be moved freely up and down (when the driving unit is installed), and so that it will remain in any position without the weight of the driving unit pulling it down.

If necessary, you can adjust the backlash of the slide plate (16) using the three threaded pins (9): release the counternuts, tighten the threaded pins and fasten the counternuts again.

Troubleshooting

Electronic restart protection (for preventing accidental restarting)

If, when the driving unit is switched on,

1. the magnet is switched off or
2. the power supply is interrupted,
   the driving unit comes to a standstill.

If the magnet is then reactivated or the power supply restored, the driving unit will not restart automatically for safety reasons (electronic restart protection). Switch the driving unit back on.

See also chapter Switching on/Switch-on Sequence, direction of rotation.

Electronic signal indicator (14) for MAG 50

Continuously lit - Overload
The motor temperature is too high. Reduce the load on the machine. The machine will stop if the overloading persists. Switch off the machine, switch it back on again and allow to cool down at idle speed.

The motor part cannot be moved up or down.
Depress (8) lock switch.

Accessories

Use only genuine Metabo accessories.

Use only accessories that fulfill the requirements and specifications listed in these operating instructions.

1. Core drill with 19 mm Weldon shank, HSS/HM
2. Centering pin, short,
   HSS: for 30 mm cutting depth
   HM: for core drill bit diameter 14-17 mm
3. Centering pin, long,
   HSS: for 55 mm cutting depth
   HM:0 for core drill bit diameter 18-100 mm
4. Morse taper for chuck with female taper
5. Key-type chuck with female taper
6. Metal drill bit
7. Quick replacement system MK2 on Weldon, 19 mm
8. Industrial holder MK2 on Weldon, 19 mm
9. Securing belt with ratchet
10. Universal cutting spray
11. Weldon adapter, 19 mm, on thread ½" x 20 UNF
12. Geared chuck with thread ½" x 20 UNF
13. Adapter Weldon, 19 mm, on Fein Quick In

For a complete range of accessories, see www.metabo.com or the main catalogue.

Repairs

Have your power tool repaired by a qualified electrician. This power tool complies with the applicable safety regulations. Repairs must only be carried out by qualified electricians and using original spare parts; otherwise the user faces a risk of accidents.

Any Metabo power tool in need of repair can be sent to one of the addresses listed in the spare parts list.

Please attach a description of the fault to the power tool.

Technical specifications

Explanatory notes on the specifications. Changes due to technological progress reserved.

T = Tool attachment
M = Max. torque
D_{max, K} = Max. diameter (core drill bit)
D_{max, S} = Max. diameter (spiral drill bit)
D_{max, T} = max. diameter (tap)
P₁ = Nominal power input
P₂ = Power output
n₀ = No load speed
n₁ = Speeds at rated load
H_max = Max. stroke
H_u = Height (incl. motor) with slide plate in bottom position
H_o = Height (incl. motor) with slide plate in top position
A = Dimensions of magnetic flux
m = Weight without mains cable

A-effective perceived sound levels:
L_pA = Sound pressure level
L_WA = Acoustic power level
K_pA, K_WA= Uncertainty (noise level)

During operation the noise level can exceed 80 dB(A).

Wear ear protectors!

Measured values determined in conformity with EN 61029.

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