BDS UNITEC MAB 425 User manual

Operating instructions
MAB 425

2
MAB 425
ENGLISH
Table of Contents
Foreword.......................
.3
Instructions for use ...............3
Copyright . . . . . . . . . . . . . . . . . . . . . . . .3
Structure of the safety warnings .......4
Intended use ......................5
Liability disclaimer . . . . . . . . . . . . . . . . . 5
Safety.......................... .6
Fundamental safety precautions . . . . . .6
Electric shock hazard ...............6
Risk of injury ......................7
Prevention of damage . . . . . . . . . . . . . .8
Safety installations .................9
Personal protective equipment........ 10
Components/scope of supply...... .11
Machine overview ..................11
Accessories . . . . . . . . . . . . . . . . . . . . . .12
Control panel . . . . . . . . . . . . . . . . . . . . . 12
Before using for the rst time ......13
Transport inspection................13
Preparations ....................
.13
Additional safety measures for
certain operations..................13
Check the condition of the substrate . . .14
Inserting the tool...................16
Operation ..................... . 19
Activating/deactivating magnetic clamp
. .19
Switching machine ON/OFF ..........20
Selecting the speed range . . . . . . . . . . .20
Drilling with the machine . . . . . . . . . . . .21
Eliminating blockages ............
.23
Cleaning ........................24
After every use ....................24
Maintenance . . . . . . . . . . . . . . . . . . . . .25
Adjusting the guide of the machine slide
. .25
Replacing the carbon brushes . . . . . . . .25
After-Sales Service/Service . . . . . . . . . .25
Troubleshooting ................ .26
Faults: causes and remedies .........26
Storage/disposal . . . . . . . . . . . . . . . . .27
Storage ..........................27
Disposal . . . . . . . . . . . . . . . . . . . . . . . . .27
Annex . . . . . . . . . . . . . . . . . . . . . . . . . .28
Technical data . . . . . . . . . . . . . . . . . . . .28
EC Declaration of Conformity.........29

3
Foreword
MAB 425
ENGLISH
Foreword
With the purchase of this machine you have decided in favour of a
quality product whose engineering and sturdiness have been de-
signed to meet the high demands of day-to-day professional use.
Read all the information contained here to familiarise yourself
quickly with the machine and to be able to make full use of its
functions.
This machine will serve you for many years to come if you handle
and treat it properly.
Instructions for use
These operating instructions form an integral part of the Magnetic
Core Drilling Machine MAB 425 (hereinafter referred to as "ma-
chine") and contains important information for the commissioning,
safety, intended use and care of the machine.
The operating instructions must be kept near the machine at all
times. They must be read and observed by all persons entrusted
with operation, troubleshooting and/or cleaning of the machine.
Keep these operating instructions in a safe place and pass them
on with the machine to any future owners.
Copyright
This document is protected by copyright.
Any duplication or reprinting, in whole or in part, and the reproduc-
tion of the illustrations even in modied form is only permitted with
the written approval of the manufacturer.

4
Instructions for use
MAB 425
ENGLISH
Structure of the safety warnings
The following warnings are used in the present operating instruc-
tions:
DANGER
A warning of this category draws attention to an impending
dangerous situation.
If the dangerous situation is not avoided, it may lead to serious
injury or even death.
Follow the instructions in this warning to avoid the danger of►
serious injury or even death.
WARNING
A warning of this category draws attention to a potentially
dangerous situation.
If the dangerous situation is not avoided, it may lead to injuries.
Follow the instructions in this warning to avoid the risk of►
injury.
CAUTION
A warning of this category draws attention to potential
material damage.
If the situation is not avoided, it may lead to material damage.
Follow the instructions in this warning to avoid material dam-►
age.
NOTE
A note draws attention to additional information that simpli-►
es the use of the machine.

5
Instructions for use
MAB 425
ENGLISH
Intended use
The machine is intended solely for drilling operations in magnetic
and non-magnetic metals within the limits specied in the techni-
cal data.
Use in any other or further way is not considered an intended use.
WARNING
Danger from use for other than the intended purpose!
If not used for its intended purpose and/or used in any other
way, the machine may be or become a source of danger.
Use the machine only for its intended purpose.►
Observe the procedures described in these operating►
instructions.
No claims of any kind will be accepted for damage or injury result-
ing from use of the machine for other than its intended purpose.
The risk has to be borne solely by the machine owner.
NOTE
If used commercially, pay attention to compliance with the►
accident prevention regulations and the Safety at Work
Ordinance.
Liability disclaimer
All technical information, data and instructions for commissioning,
operation and care of the machine contained in these operating
instructions represent the latest status at the time of printing.
The manufacturer assumes no liability for damage or injury result-
ing from failure to observe the operating instructions, use for other
than the intended purpose, unprofessional repairs, unauthorised
modications or use of non-approved spare parts and accesso-
ries, tools and lubricants.

6
Safety
MAB 425
ENGLISH
Safety
CAUTION
When using electrical tools, the following fundamental
precautions must be taken to protect against electric shock
and the risk of injury and re!
Fundamental safety precautions
Do not use the machine in ammable or potentially explosive■
environments.
Persons who due to their physical, mental or motor response■
abilities are unable to operate the machine safely may only
use the machine under supervision or instruction by a respon-
sible person.
Persons with heart pacemakers or other medical implants■
must not use this machine.
Children must not be allowed to use the machine.■
Inspect the machine for visible signs of damage before use.■
Do not use a visibly damaged machine.
Before beginning work, check the condition of the safety chain■
and the function of the switches on the machine.
Repairs to the mains cable may only be carried out by a quali-■
ed electrician.
Repairs to the machine may only be carried out by an author-■
ised workshop or by the works after-sales service. Unqualied
repairs can lead to considerable danger for the user.
Repairs to the machine during the warranty period may only■
be carried out by a service centre authorised by the manufac-
turer, as otherwise the warranty will be voided.
Defective parts may only be replaced with original spare parts.■
Only these parts guarantee that the safety requirements are
satised.

7
Safety
MAB 425
ENGLISH
Do not leave the machine unsupervised during operation.■
Store the machine in a dry, temperate location out of the reach■
of children.
Do not leave the machine standing outdoors and do not ex-■
pose it to moisture.
Make sure that your work area is sufciently lit (>300 Lux).■
Do not use low power machines for heavy working.■
Make sure that your workplace is clean.■
Keep the machine clean, dry and free of oil and grease.■
Follow the instructions on lubricating and cooling the tool.■
Electric shock hazard
DANGER
Danger to life by electric shock!
Contact with live wires or components could lead to seri-
ous injury or even death!
Observe the following safety precautions to avoid electric
shocks:
Do not open the housing of the machine. Risk of electric►
shock if live terminals are touched.
Never immerse the machine or the plug into water or other►
liquids.
Use only extension leads or cable drums with a cable cross-►
section of 1.5 mm².
Only use extension leads that are approved for the place of►
work.
Check the condition of the extension lead regularly and►
replace if damaged.
Avoid direct body contact with grounded parts (e.g., tubes,►
radiators, steel girders) to reduce the risk of electric shock in
the event of a defect.

8
Safety
MAB 425
ENGLISH
Risk of injury
WARNING
Improper handling of the machine increases the risk of
injury!
Observe the following safety precautions to avoid injuring your-
self and/or others:
Operate the machine only with the protective equipment►
stipulated in these operating instructions (see section Per-
sonal protective equipment).
Remove loose jewellery before beginning work. Wear a hair►
net if you have long hair.
Always switch off the machine before changing tools, per-►
forming maintenance or cleaning. Wait until the machine has
come to a complete standstill.
Always remove the plug from the mains socket before►
changing tools, cleaning or performing maintenance, in
order to avoid unintentional starting of the machine.
Do not put your hand into the machine while it is in op-►
eration. Remove shavings only when the machine is at a
standstill.
When working on scaffolding, the operator must be secured►
with a safety belt as the machine can oscillate dangerously
in the event of interruption to the power supply.
Check for secure clamping of the electromagnets on the►
substrate before every use (see section Preparing).
Secure the machine with the safety chain supplied when►
working from an inclined or vertical position or during over-
head work. The machine could fall down if the magnet is
loosened or the power fails.
Check that the tool is tightened securely before using (see►
section Inserting the tool).
Do not allow the connecting cable to hang over edges (dan-►
ger of tripping).

9
Safety
MAB 425
ENGLISH
Prevention of damage
CAUTION
Potential property damage in case of inexpert handling of
the machine!
Observe the following instructions to avoid property damage:
Before connecting the machine, compare the connection►
data (voltage and frequency) on the rating plate with those
of your mains power supply. The data must correspond in
order to avoid damage to the machine.
Always carry the machine at the handle, not by the connect-►
ing lead.
Always pull the mains lead out of the plug socket at the plug,►
not at the mains lead.
Do not pinch the connecting lead.►
Do not expose the connecting lead to heat or chemical►
liquids.
Do not pull the connecting lead across sharp edges or hot►
surfaces.
Lay the connecting lead in such a way that it cannot be►
caught and wound up in the rotating part of the machine.

10
Safety
MAB 425
ENGLISH
Safety installations
Restarting protection
NOTE
The machine stops automatically of the magnetic clamp is►
switched off or in the event of a power failure.
In order to prevent unexpected starting of the machine when the
magnetic clamp is switched on again or when the power supply
returns after a power failure ("restarting protection"), the machine
must be switched on at the ON/OFF switch again.
Magnet indicator
The magnet indicator provides a visual control of the magnet's
clamping force.
Magnet indicator is lit■GREEN:
The magnet's clamping force satises the minimum require-
ments. Machining can be carried out.
Magnet indicator is lit■RED:
Insufcient magnet clamping force. Machining must not be
carried out with the machine. This can be the case in the event
of insufcient material thickness, uneven surface or due to
paint, scale or zinc coatings.

11
Safety
MAB 425
ENGLISH
Personal protective equipment
Wear the following protective equipment at all times when working
with the machine:
Symbol Meaning
Close-tting work protection clothing with a low tear-
ing resistance
Goggles to protect the eyes from ying parts and
liquids
Safety shoes to protect the feet from falling objects.
Working gloves as protection against injury
Wear the following additional protective equipment during special
operations:
Symbol Meaning
Helmet to protect your head from falling objects
Ear protectors in areas with noise emissions
> 80 db(A)
Wear a safety belt where there is a danger of falling.

12
Components/scope of supply
MAB 425
ENGLISH
Components/scope of supply
Machine overview
11
9
8
7
6
5
3
13 12
2
10
1
4
1 Core drill 7 Filler neck for cutting oil
2 Weldon tool mount 19 mm (¾") 8 Cutting oil tank
3 Support strut 9 Handle
4 Motor spindle 10 Hand lever
5 2-speed gearbox with selector 11 Control panel
6 Drive motor 12 Magnetic foot
13 Machine slide and guide

13
Components/scope of supply
MAB 425
ENGLISH
Accessories
A B C
A Allen key WAF4 Transport case
(not illustrated)
B Ejector pin ZAK 075
C Safety chain Operating instructions / warranty card
(not illustrated)
Control panel
21
22
23
21 Motor ON/OFF switch
22 Magnet ON/OFF switch
23 Magnet indicator

14
Before using for the rst time
MAB 425
ENGLISH
Before using for the rst time
Transport inspection
The machine is supplied as standard with the components indi-
cated in chapter "Components/scope of supply".
NOTE
Inspect the delivery for completeness and obvious signs of►
damage. Report an incomplete or damaged delivery to your
supplier/dealer immediately.
Preparations
This chapter contains important instructions for the necessary
preparations before starting work.
Additional safety measures for certain operations
Additional safety precautions must be taken for the following
operations with the machine:
Non-horizontal working position
WARNING
Risk of injury from the falling machine.
When working in inclined or vertical position and during over-
head work, the machine must be secured to prevent it from
falling using the safety chain (C) supplied.
Check the safety chain for proper function before every use.►
A damaged safety chain must not be used. Replace a dam-
aged safety chain immediately.
Attach the safety chain in such a way that the machine►
moves away from the operator in the event of slipping.
Lay the safety chain as tightly as possible around the handle►
of the machine.
Check the secure tting of the safety chain and lock before►
starting work.
Use the protective equipment stipulated in chapter►Personal
protective equipment.

15
Preparations
MAB 425
ENGLISH
Work on scaffolding
WARNING
Risk of falling from sudden oscillating movements of the
machine.
When working on scaffolding, the machine can make a sud-
den oscillating movement on starting or in the event of a power
failure.
Secure the machine with the safety chain (C) supplied.►
Wear a safety belt to protect yourself from falling.►
Check the condition of the substrate
The magnet clamping force is dependent on the condition of the
substrate. The clamping force is signicantly reduced by paint,
zinc and scale coatings and rust.
The substrate must satisfy the following preconditions in order
that a sufcient magnet clamping force can be achieved:
The substrate must be magnetic.■
The clamping surface and the magnetic foot (12) must be■
clean and grease-free.
The clamping surface must be completely smooth and level.■
NOTE
►Clean the substrate and the magnetic foot (12) of the ma-
chine before use.
►Remove any unevenness and loose rust from the substrate.
►CS Unitec offers special holding devices in its range of
accessories.
The best clamping effect is obtained on low-carbon steel sub-
strate with a thickness of at least 20 mm.

16
Preparations
MAB 425
ENGLISH
Steel of low thickness
When drilling in steel of low thickness, an additional steel plate
(minimum dimensions 100 x 200 x 20 mm) must be placed under
the workpiece. Secure the steel plate to prevent it from falling.
NF metals or workpieces with an uneven surface
A special holding device must be used when drilling in NF metals
or in workpieces with an uneven surface.
NOTE
►CS Unitec offers special clamping devices for tubes
and non-magnetic materials in its range of accessories.
Inserting the tool
The machine is equipped with a 19 mm Weldon direct mounting.
Depending on the type of tool to be used, corresponding adapters
and drill chucks must be employed.
Tool tool mount to be used
Tools with
19 mm Weldon shank
Insert the tool in the Weldon tool
mount (2).
Tools with
straight shank
Insert the drill chuck through a ZAP 100
adapter in the tool mount (2).
Fasten the drill chuck with the diameter
½" x 20 directly on the motor spindle (4).

17
Preparations
MAB 425
ENGLISH
Safety precautions
WARNING
Risk of injury!
Do not use damaged, soiled or worn tools.►
Carry out tool changes only when the machine is switched►
off and at a standstill. Remove plug from the mains socket.
After inserting, check that the tool is engaged securely.►
Only use tools, adapter and accessories that match the►
machine.
Weldon industrial arbor
Weldon tool mounting
Inserting the tool
Before mounting, clean the Weldon shank and tool mount (2)
of the machine.
Check the the lead connection for lubricant.
Unscrew the two Allen screws in the tool mount using the
Allen key (A) supplied.
Insert the tool in the tool mount (2).
NOTE
Insert the appropriate ejector pin (B) before inserting a core►
drill.
Tighten the two Allen screws in the tool mount (2) using the
Allen key (A) supplied.
WARNING
Risk of injury from an incorrectly inserted tool!
Check the tool stability.►
Removing the tool
Unscrew the two Allen screws in the tool mount (2) using the
Allen key (A) supplied and pull the tool downwards out of the
tool mount.

18
Preparations
MAB 425
ENGLISH
Using the drill chuck in tool mount
A drill chuck can be mounted in the Weldon tool mount (2) through
a ZAP 100 adapter.
NOTE
It can be used with drill chuck up to 8.5 mm of diameter►
according to DIN 338. Over the diameter of 8.5 mm, it is
suitable for for short twist drills according to DIN 1897 only.
Fasten the drill chuck on the adapter.
Insert the drill chuck with the adapter in the machine as
described in the previous chapter.
Using the drill chuck on a motor spindle
In order to be able to use a twist drill above diameter 8.5 mm ac-
cording to DIN 338, the drill chuck with a ½” x 20 thread must be
screwed directly on the motor spindle (4).
To do this, the machine must be adjusted as follows:
Take out the lubricant feed.
Fasten the motor spindle (4) with an open-end wrench SW
18 and unscrew the tool mount (3) turning it counter-clock-
wise.
Unscrew the screws at the bottom of the support strut (4)
and detach the support strut.
Take out the tool mount (2) and the support strut (3).
Fasten the drill chuck on the ½“ x 20 thread.
NOTE
During the replacement, the support strut should be rst fas-►
tened on lighly. Fasten the support tightly only after attach-
ing the tool mount and a short activation of the motor.

19
Operation
MAB 425
ENGLISH
Operation
Activating/deactivating magnetic clamp
Activating magnetic clamp
CAUTION
Switch on the magnetic clamp only when the machine is►
standing on a magnetic substrate to avoid overheating of the
magnet.
Turn on switch (22). The indicator light in switch (22) comes
on.
Check the magnet clamping force at the magnet indica-
tor (23). When the magnet clamping force is sufcient, the
MAGNET POWER indicator light (23) is green. If the MAG-
NET POWER indicator light (23) is red, there is not sufcient
magnet clamping force available.
CAUTION
The maximum magnet clamping force is only available after►
switching on the motor.
Deactivating magnetic clamp
Secure the machine at the handle (9) to prevent the machine
from slipping off the surface.
Turn off switch (22). The indicator light in switch (22) goes
out.

20
Operation
MAB 425
ENGLISH
Switching machine ON/OFF
Turn the machine ON at the ON/OFF switch (21) with the
green button (I) and OFF with the red button (O).
NOTE
The machine can only be switched on when the magnetic►
clamp has been switched on.
Allow a severely overheated machine to run on at no-load►
speed for approx. 2 minutes to let it cool down.
The machine switches off automatically in the event of a►
power failure or if the magnetic clamp is switched off.
Selecting the speed range
CAUTION
Switch over the gear stages only with the machine at stand-►
still.
The machine has a gearbox with two mechanical gear stages:
Gear stage 1: 430 rpm
Gear stage 2: 760 rpm
To select the desired gear stage, set selector lever (5) to
stage 1 or 2 with the machine switched off.
NOTE
Select the speed range according to the material and drilling►
diameter.
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