ESAB MEK 20 is a portable wire feed unit designed for MIG/MAG welding. With its four-roller drive system, it ensures precise and consistent wire feeding, making it ideal for various welding applications. The unit's compact design and insulated protective frame provide portability and safety during operation. It accommodates a 200 mm diameter wire reel, allowing for longer welding sessions without frequent reel changes.
ESAB MEK 20 is a portable wire feed unit designed for MIG/MAG welding. With its four-roller drive system, it ensures precise and consistent wire feeding, making it ideal for various welding applications. The unit's compact design and insulated protective frame provide portability and safety during operation. It accommodates a 200 mm diameter wire reel, allowing for longer welding sessions without frequent reel changes.
GB
Valid for serial no. 726--xxx--xxxx, 410--xxx--xxxx,
502--xxx--xxxx
0457 363 101 GB 050115
MEK 20
Instruction manual
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TOCe
Rights reserved to alter specifications without notice.
1 DIRECTIVE 3........................................................
2SAFETY 3...........................................................
3 INTRODUCTION 4...................................................
4 TECHNICAL DATA 5.................................................
5 INSTALLATION 5....................................................
6 OPERATION 5.......................................................
6.1 Connection 6...............................................................
6.2 Startingtoweld 6...........................................................
6.3 Wire feed pressure 7........................................................
6.4 Changing / loading wire 7....................................................
6.5 Changing feed rollers on 7....................................................
7 MAINTENANCE 8....................................................
7.1 Inspection and cleaning 8....................................................
8 ORDERING OF SPARE PARTS 8......................................
DIAGRAM 10............................................................
ORDERING NUMBER 11.................................................
WEAR COMPONENTS 12.................................................
ACCESSORIES 14.......................................................
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1DIRECTIVE
DECLARATION OF CONFORMITY
ESAB Welding Equipment AB, S--695 81 Laxå, Sweden, declares that Wire feed unit MEK 20 / MEK
20W from serial number 726 onwards, conforms to standard EN 60974--5, in accordance with the re-
quirements of directive (73/23/EEC) and appendix (93/68/EEC) and standard EN 50199 in accord-
ance with the requirements of directive (89/336/EEC) and appendix (93/68/EEC).
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Anders Birgersson
Managing Director
ESAB Welding Equipment AB
695 81 LAXÅ
SWEDEN Tel: + 46 584 81000 Fax: + 46 584 411924
Laxå 98--04--10
2SAFETY
Users of ESAB welding equipment have the ultimate responsibility for ensuring that anyone who
works on or near the equipment observes all the relevant safety precautions. Safety precautions
must meet the requirements that apply to this type of welding equipment. The following recommen-
dations should be observed in addition to the standard regulations that apply to the workplace.
All work must be carried out by trained personnel well--acquainted with the operation of the welding
equipment. Incorrect operation of the equipment may lead to hazardous situations which can result
in injury to the operator and damage to the equipment.
1. Anyone who uses the welding equipment must be familiar with:
S its operation
S location of emergency stops
S its function
S relevant safety precautions
S welding
2. The operator must ensure that:
S no unauthorized person is stationed within the working area of the equipment when it is
started up.
S no--one is unprotected when the arc is struck
3. The workplace must:
S be suitable for the purpose
S be free from drafts
4. Personal safety equipment
S Always wear recommended personal safety equipment, such as safety glasses, flame--proof
clothing, safety gloves.
S Do not wear loose--fitting items, such as scarves, bracelets, rings, etc., which could become
trapped or cause burns.
5. General precautions
S Make sure the return cable is connected securely.
S Work on high voltage equipment may only be carried out by a qualified electrician.
S Appropriate fire extinquishing equipment must be clearly marked and close at hand.
S Lubrication and maintenance must not be carried out on the equipment during operation.
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WARNING
READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE INSTALLING OR OPERATING.
ARC WELDING AND CUTTING CAN BE INJURIOUS TO YOURSELF AND OTHERS. TAKE PRECAU-
TIONS WHEN WELDING. ASK FOR YOUR EMPLOYER’S SAFETY PRACTICES WHICH SHOULD BE
BASED ON MANUFACTURERS’ HAZARD DATA.
ELECTRIC SHOCK -- Can kill
S Install and earth the welding unit in accordance with applicable standards.
S Do not touch live electrical parts or electrodes with bare skin, wet gloves or wet clothing.
S Insulate yourself from earth and the workpiece.
S Ensure your working stance is safe.
FUMES AND GASES -- Can b e dangerous to health
S Keep your head out of the fumes.
S Use ventilation, extraction at the arc, or both, to take fumes and gases away from your breathing zone
and the general area.
ARC RAYS -- Can injure eyes and burn skin.
S Protect y our eyes and body. Use the correct welding screen and filter lens and wear protective
clothing.
S Protect bystanders with suitable screens or curtains.
FIRE HAZARD
S Sparks (spatter) can cause fire. Make sure therefore that there are no inflammable materials nearby.
NOISE -- Excessive noise can damage hearing
S Protect y our ears. Use earmuffs or other hearing protection.
S Warn bystanders of the risk.
MALFUNCTION -- Call for expert assistance in the event of malfunction.
PROTECT YOURSELF AND OTHERS!
ESAB can provide yo u with all necessary welding p rotectio n and accessories.
WARNING!
Read and understand the instruction manual before installing
or operating.
This product is solely intended for arc welding.
3 INTRODUCTION
MEK 20 is a portable wire feed unit with four--roller drive, designed for MIG/MAG
welding in conjunction with Esab’s A10 wire feed system .
The wire feed unit can accommodate a 200 mm diameter wire reel.
The wire feed unit is mounted on an insulated protective frame equipped with
runners.
Details of ESAB’s accessories for the wire feed units can be found on page
14.
GB
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4 TECHNICAL DATA
Dimensions lxwxh 500x195x300 mm
Weight 14 kg
Wire feed speed 1,9--25 m/min
Voltage 42 V 50--60 Hz
Power consumption 300 VA
Torch connection EURO
Wire reel max 200 mm
5 INSTALLATION
The installatio n must be executed b y a professional.
WARNING!
This product is intended for industrial use. In a domestic environment this product may cause radio
interference. It is the user’ s responsibility to take adequate precautions.
WARNING!
When welding in an environment with increased electrical danger , only power sources intended
for this environment may be used. These power sources are marked with the symbol .
6OPERATION
General safety regulations for the handling of the equipment can be found on
page 3. Read through before you start using the equipment!
WARNING!
Assure that the side panels are closed during operation.
To prevent the reel from sliding off the hub: Lock the reel in place by
turning the red knob as shown on the warning label attached next to
the hub.
WARNING!
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WARNING!
Rotating parts can cause injury, take great care.
WARNING!
There is a risk of tipping if the wire feed unit is fitted with a counterbalance arm. Secure the
equipment, especially if used on an uneven or sloping surface.
When moving the equipment use intended handle. NOTE! Never pull on the gun.
6.1 Connection
1. Nipple, cooling water (only certain models)
2. Nipple, cooling water (only certain models)
3. Nipple, gas connection
4. Connector, control cable
5. Adapter, welding current
6. Connector, remote control
7. Adapter, welding torch
8. Potentiometer, wire feed speed
9. Potentiometer, welding voltage
10. Digital meter
6.2 Startingtoweld
Throttle valve (1) Gas flow
Switch (2) Crater fill on/off.
Switch trigger latch on/off (3)
2 stroke:Wire feed starts when you press the trigger and stops when
you release it.
4 stroke:Press the trigger to start welding, then release it. Welding
continues until you press the trigger again.
Potentiometer (4) Burn--back time 0 -- 0.5 seconds.
Potentiometer (5) Crater fill time 0 -- 5.1 seconds.
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6.3 Wire feed pressure
Start by making sure that the wire moves smoothly through the wire guide. Then
set the pressure of the wire feeder’s pressure rollers. It is important that the
pressure is not too great.
Fig 1 Fig 2
To check that the feed pressure is set correctly, you can feed out the wire against
an insolated object, e.g. a piece of wood.
When you hold the gun approx. 5 mm from the piece of wood (fig. 1) the feed
rollers should slip.
If you hold the gun approx. 50 mm from the piece of wood, the wire should be
fed out and bend (fig. 2).
6.4 Changing / loading wire
S Open the side panel.
S Disconnect the pressure sensor by folding it backwards, the pressure rollers
slide up.
S Straighten out the new wire 10--20 cm. F ile away burrs and sharp edges from the
end of the wire before inserting it into the wire feed unit.
S Make sure that the wire goes properly into the feed roller’s track and into the
outlet nozzle or wire guide.
S Secure the pressure sensor.
S Close the side panel.
6.5 Changing feed rollers on
S Open the side panel.
S Disconnect the pressure sensor (1) by folding it
backwards.
S Disconnect the pressure rollers (2) by turning the
axle (3) 1/4 turn clockwise and pulling out the axle.
The pressure rollers disconnect.
S Disconnect the feed rollers (4) by unscrewing the nuts
(5) and pulling out the rollers.
During installation, repeat the above in the reverse order.
Choice of tracks in the feed rollers
Turn the feed roller with the dimensioning mark for the required
track towards you.
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7 MAINTENANCE
Regular maintenance is important for safe, reliable operation.
Note!
All guarantee undertakings from the supplier cease to apply if the customer himself
attempts any work in the product during the guarantee period in order to rectify any
faults.
7.1 Inspection and cleaning
Wire feed u nit
Check regularly that the wire feed unit is not clogged with dirt.
S Cleaning and replacement of the wire feed unit m echanism’s worn parts should
take place at regular intervals in order to achieve trouble--free wire feed. Note
that if pre--tensioning is set too hard, this can result in abnormal wear on the
pressure roller, feed roller and wire guide.
The brake hub
The hub is adjusted when delivered, if
readjustment is required, follow the instructions
below. Adjust the brake hub so that wire is slightly
slack when wire feed stops.
S Adjusting the braking torque:
S Turn the red handle to the locked position.
S Insert a screwdriver into the springs in the hub.
Turn the springs clockwise to reduce the braking torque
Turn the springs counterclockwise to increase the braking torque. NB: Turn
both springs through the same amount.
Weldin g gun
S Cleaning and replacement of the welding gun’s wear parts should take place at
regular intervals in order to achieve trouble--free wire feed. Blow the wire guide
clean regularly and clean the contact tip.
8 ORDERING OF SPARE PARTS
Spare parts may be ordered through your nearest ESAB dealer, see the last page of
this publication.
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page
Diagram
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MEK 20
Edition 0501 15
Ordering number
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bm25o11a
Ordering no. Denomination Type Notes
0457 235 880 Wire feed unit MEK 20 without water connection
0457 235 881 Wire feed unit MEK 20W with water connection
0457 363 990 Spare parts list MEK 20 / MEK 20W
The spare parts list is available on the Internet at www .esab.com
Under ”Products” and ”Welding & cutting equipment”, you will find a link to the page where you can
both search for and download instruction manuals and spare parts lists.
MEK 20
Edition 0501 15
Wear components
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bm25w11a
Item A
Feed and pressure rollers
Ordering no. Wire dimensions Wire type Groove type Roller markings
0459 052 001 Ø 0.6 & 0.8 mm Fe, Ss & cored V 0.6 S2 &0.8S2
0459 052 003 Ø 0.9/1.0 & 1.2 mm Fe, Ss & cored V 1.0 S2 &1.2S2
0459 052 013 Ø 1.4 & 1.6 mm Fe, Ss & cored V 1.4 S2 &1.6S2
0458 825 001 Ø 0.9/1.0 & 1.2 mm Cored V--knurled 1.0 R2 &1.2R2
0458 825 002 Ø 1.2 & 1.4 mm Cored V--knurled 1.2 R2 &1.4R2
0458 825 003 Ø 1.6 & 2.0 mm Cored V--knurled 1.6 R2 &2.0R2
0458 824 001 Ø 0.8 & 0.9/1.0 mm
Al
U 0.8 A2 &1.0A2
0458 824 003 Ø 1.2 & 1.6 mm Al U 1.2 A2 &1.6A2
Use only pressure and feed rollers marked A2, R2 or S2.
The rollers are marked with wire dimension in mm, some are also marked with inch.
Item B Item C Item D
Gear adap ter Inlet n ozzle Drive gear
Ordering no. Ordering no. Ordering no.
0459 441 880
0455 049 880 0459 440 001
Item E
Intermediate nozzles
Ordering no. Wire type
0455 072 002 Fe, Ss & cored
0456 615 001 Al
Item F
Outlet nozzles
Ordering no. Dimensions Wire type
0469 837 880 Ø 2.0 mm steel for 0.6-- 1.6 mm wire Fe, Ss & cored
0469 837 881 Ø 2.0 mm plastic for 0.8--1.6 mm wire Al
MEK 20
Edition 0501 15
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MEK 20
Edition 0501 15
Accessories
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Item Ordering no. Denomination
2 0457 203 880 Protection frame
3 0466 515 880 Remote control unit: Aristo Control Synergic Torch
4 0466 801 880 Remote control unit: Aristo Control Synergic Box
Connection set for 400 A power sources
Connection set 1.7 m ......................
Connection set 8 m ........................
Connection set 16 m .......................
Connection set 25 m .......................
Connection set 35 m .......................
Connection set 1.7 m, water ................
Connection set 8 m, water ..................
Connection set 16 m, water .................
Connection set 25 m, water .................
Connection set 35 m, water .................
0469 836 880
0469 836 881
0469 836 882
0469 836 883
0469 836 884
0469 836 885
0469 836 886
0469 836 887
0469 836 888
0469 836 889
Connection set for 500 A power sources
Connection set 1.7 m ......................
Connection set 8 m ........................
Connection set 16 m .......................
Connection set 25 m .......................
Connection set 35 m .......................
Connection set 1.7 m, water ................
Connection set 8 m, water ..................
Connection set 16 m, water .................
Connection set 25 m, water .................
Connection set 35 m, water .................
0469 836 890
0469 836 891
0469 836 892
0469 836 893
0469 836 894
0469 836 895
0469 836 896
0469 836 897
0469 836 898
0469 836 899
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page
ESAB AB
SE--695 81 LAXÅ
SWEDEN
Phone +46 584 81 000
www.esab.co m
041227
ESAB subsidiaries and representative offices
Europe
AUSTRIA
ESAB Ges.m.b.H
Vienna--Liesing
Tel: +43 1 888 25 11
Fax: +43 1 888 25 11 85
BELGIUM
S.A. ESAB N.V.
Brussels
Tel: +32 2 745 11 00
Fax: +32 2 745 11 28
THE CZECH REPUBLIC
ESAB VAMBERK s.r.o.
Prague
Tel: +420 2 819 40 885
Fax: +420 2 819 40 120
DENMARK
Aktieselskabet ESAB
Copenhagen--Valby
Tel:+4536300111
Fax:+4536304003
FINLAND
ESAB Oy
Helsinki
Tel: +358 9 547 761
Fax: +358 9 547 77 71
FRANCE
ESAB France S.A.
Cergy Pontoise
Tel:+33130755500
Fax:+33130755524
GERMANY
ESAB GmbH
Solingen
Tel: +49 212 298 0
Fax: +49 212 298 218
GREAT BRITAIN
ESAB Group (UK) Ltd
Waltham Cross
Tel: +44 1992 76 85 15
Fax: +44 1992 71 58 03
ESAB Automation Ltd
Andover
Tel: +44 1264 33 22 33
Fax: +44 1264 33 20 74
HUNGARY
ESAB Kft
Budapest
Tel:+3612044182
Fax:+3612044186
ITALY
ESAB Saldatura S.p.A.
Mesero (Mi)
Tel:+3902979681
Fax:+390297289181
THE NETHERLANDS
ESAB Nederland B.V.
Utrecht
Tel: +31 30 2485 377
Fax: +31 30 2485 260
NORWAY
AS ESAB
Larvik
Tel:+4733121000
Fax:+4733115203
POLAND
ESAB Sp.zo.o.
Katowice
Tel: +48 32 351 11 00
Fax: +48 32 351 11 20
PORTUGAL
ESAB Lda
Lisbon
Tel: +351 8 310 960
Fax: +351 1 859 1277
SLOVAKIA
ESAB Slovakia s.r.o.
Bratislava
Tel:+421744882426
Fax:+421744888741
SPAIN
ESAB Ibérica S.A.
Alcalá de Henares (MADRID)
Tel: +34 91 878 3600
Fax: +34 91 802 3461
SWEDEN
ESAB Sverige AB
Gothenburg
Tel:+4631509500
Fax:+4631509222
ESAB International AB
Gothenburg
Tel:+4631509000
Fax:+4631509360
SWITZERLAND
ESAB AG
Dietikon
Tel: +41 1 741 25 25
Fax: +41 1 740 30 55
North and South America
ARGENTINA
CONARCO
Buenos Aires
Tel: +54 11 4 753 4039
Fax: +54 11 4 753 6313
BRAZIL
ESAB S.A.
Contagem--MG
Tel: +55 31 2191 4333
Fax: +55 31 2191 4440
CANADA
ESAB Group Canada Inc.
Missisauga, Ontario
Tel: +1 905 670 02 20
Fax: +1 905 670 48 79
MEXICO
ESAB Mexico S.A.
Monterrey
Tel: +52 8 350 5959
Fax: +52 8 350 7554
USA
ESAB Welding & Cutting Products
Florence, SC
Tel: +1 843 669 44 11
Fax: +1 843 664 57 48
Asia/Pacific
CHINA
Shanghai ESAB A/P
Shanghai
Tel: +86 21 5308 9922
Fax: +86 21 6566 6622
INDIA
ESAB India Ltd
Calcutta
Tel: +91 33 478 45 17
Fax: +91 33 468 18 80
INDONESIA
P.T. ESABindo Pratama
Jakarta
Tel: +62 21 460 0188
Fax: +62 21 461 2929
JAPAN
ESAB Japan
Tokyo
Tel: +81 3 5296 7371
Fax: +81 3 5296 8080
MALAYSIA
ESAB (Malaysia) Snd Bhd
Shah Alam Selangor
Tel: +60 3 5511 3615
Fax: +60 3 5512 3552
SINGAPORE
ESAB Asia/Pacific Pte Ltd
Singapore
Tel:+6568614322
Fax: +65 6861 31 95
SOUTH KOREA
ESAB SeAH Corporation
Kyungnam
Tel: +82 55 269 8170
Fax: +82 55 289 8864
UNITED ARAB EMIRATES
ESAB Middle East FZE
Dubai
Tel: +971 4 887 21 11
Fax: +971 4 887 22 63
Representative offices
BULGARIA
ESAB Representative Office
Sofia
Tel/Fax: +359 2 974 42 88
EGYPT
ESAB Egypt
Dokki--Cairo
Tel: +20 2 390 96 69
Fax: +20 2 393 32 13
ROMANIA
ESAB Representative Office
Bucharest
Tel/Fax: +40 1 322 36 74
RUSSIA--CIS
ESAB Representative Office
Moscow
Tel:+70959379820
Fax: +7 095 937 95 80
ESAB Representative Office
St Petersburg
Tel:+78123254362
Fax: +7 812 325 66 85
Distributors
For addresses and phone
numbers to our distributors in
other countries, please visit our
home page
www.esab.co m
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ESAB MEK 20 is a portable wire feed unit designed for MIG/MAG welding. With its four-roller drive system, it ensures precise and consistent wire feeding, making it ideal for various welding applications. The unit's compact design and insulated protective frame provide portability and safety during operation. It accommodates a 200 mm diameter wire reel, allowing for longer welding sessions without frequent reel changes.
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