MAG/WELDING CLAMP: DUAL SWITCH 148 X 148MM 90DEG

SKU: WDA065826
Excl. GST: $33.00
Incl. GST: $37.95
* Mgnetic welding clamp is 90Deg t positioning * Simple to use - fast and easy way to hold metal workpieces for welding * Suitable for round, square, angle and flat stock * A must in any workshop * Dual on/off switch *

MAG/WELDING CLAMP: DUAL USE 100 X 73MM 60/90DEG 2PCS

SKU: WDA065828
Excl. GST: $33.00
Incl. GST: $37.95
* Mgnetic welding clamp has 60 and 90Deg set positioning * Simple to use - fast and easy way to hold metal workpieces at different angles for welding * Suitable for round, square, angle and flat stock * A must in any workshop * Dual on/off switch *

MAG/WELDING CLAMP: MULTI ANGLE 59 X 50MM 2PCS

SKU: WDA065830
Excl. GST: $33.00
Incl. GST: $37.95
* Magnetic welding clamp has 30, 60, 45 and 90Deg set positioning * Simple to use - fast and easy way to hold metal workpieces at different angles for welding * Suitable for round, square, angle and flat stock * A must in any workshop *

MAG/WELDING CLAMP: MULTI ANGLE 110 X 95MM

SKU: WDA065832
Excl. GST: $33.00
Incl. GST: $37.95
* Magnetic welding clamp has 30, 60, 45 and 90Deg set positioning * Simple to use - fast and easy way to hold metal workpieces at different angles for welding * Suitable for round, square, angle and flat stock * A must in any workshop *

MAG/WELDING CLAMP: MULTI ANGLE 150 X 130MM

SKU: WDA065834
Excl. GST: $33.00
Incl. GST: $37.95
* Magnetic welding clamp has 30, 60, 45 and 90Deg set positioning * Simple to use - fast and easy way to hold metal workpieces at different angles for welding * Suitable for round, square, angle and flat stock * A must in any workshop *

MAG/WELDING CLAMP: MULTI ANGLE 136 X 93MM 7 POSISTIONS

SKU: WDA065836
Excl. GST: $33.00
Incl. GST: $37.95
* Magnetic welding clamp has 30, 60, 45 and 90Deg set positioning * Simple to use - fast and easy way to hold metal workpieces at different angles for welding * Suitable for round, square, angle and flat stock * A must in any workshop *

MAG/WELDING CLAMP: ARROW TYPE 55 X 55MM 2PCS

SKU: WDA065840
Excl. GST: $33.00
Incl. GST: $37.95
* Magnetic welding clamp has 30, 60, 45 and 90Deg set positioning * Simple to use - fast and easy way to hold metal workpieces at different angles for welding * Suitable for round, square, angle and flat stock * A must in any workshop *

MAG/WELDING CLAMP: ARROW TYPE 80 X 80MM

SKU: WDA065842
Excl. GST: $33.00
Incl. GST: $37.95
* Magnetic welding clamp has 30, 60, 45 and 90Deg set positioning * Simple to use - fast and easy way to hold metal workpieces at different angles for welding * Suitable for round, square, angle and flat stock * A must in any workshop *

MAG/WELDING CLAMP: 90 DEG TYPE 84 X 54MM

SKU: WDA065848
Excl. GST: $33.00
Incl. GST: $37.95
* Magnetic welding clamp has 30, 60, 45 and 90Deg set positioning * Simple to use - fast and easy way to hold metal workpieces at different angles for welding * Suitable for round, square, angle and flat stock * A must in any workshop *

MAG/WELDING CLAMP: 90 DEG TYPE 110 X 70MM

SKU: WDA065850
Excl. GST: $33.00
Incl. GST: $37.95
* Magnetic welding clamp has 30, 60, 45 and 90Deg set positioning * Simple to use - fast and easy way to hold metal workpieces at different angles for welding * Suitable for round, square, angle and flat stock * A must in any workshop *

MAG/WELDING CLAMP: ADJUSTABLE ANGLE 120 X 78MM

SKU: WDA065854
Excl. GST: $33.00
Incl. GST: $37.95
* Magnetic welding clamp has 30, 60, 45 and 90Deg set positioning * Simple to use - fast and easy way to hold metal workpieces at different angles for welding * Suitable for round, square, angle and flat stock * A must in any workshop *

ELECTRODE HOLDER: 400AMP TWISTLOCK

SKU: WDA071860
Excl. GST: $26.00
Incl. GST: $29.90
* This is a 600amp electrode holder for arc welding *

ELECTRODE HOLDER: 600AMP TWISTLOCK

SKU: WDA071870
Excl. GST: $29.00
Incl. GST: $33.35
* This is a 600amp electrode holder for arc welding *

WELDING CURTAIN: 1800 X 1200MM RED

SKU: WDA072010
Excl. GST: $55.00
Incl. GST: $63.25
* This is a welding safety curtain 1800mm x 1200mm * Red colour * This is a must in any workshop to comply with safety regulations *

WELDING CURTAIN: 1800 X 1800MM RED

SKU: WDA072012
Excl. GST: $79.00
Incl. GST: $90.85
* This is a welding safety curtain 1800mm x 1200mm * Red colour * This is a must in any workshop to comply with safety regulations *

WELDING CURTAIN: 1800 X 1800MM (RED) 1.00 mm

SKU: WDA072020
Excl. GST: $94.00
Incl. GST: $108.10
* This is a welding safety curtain * Size 1800 x 1200 x 1.0mm * Red colour

WELDERS PROBAN SHOULDER HOOD:

SKU: WDA072100
Excl. GST: $41.00
Incl. GST: $47.15
* Welder safety probam hood *

CRIMP LUG: TO SUIT 500A EARTH CLAMP

SKU: WDA072150
Excl. GST: $13.50
Incl. GST: $15.53
* Welder safety probam hood *

CRIMP LUG: 95MM x 12MM HOLE

SKU: WDA072152
Excl. GST: $13.50
Incl. GST: $15.53
* Welder safety probam hood *

CRIMP LUG: 50MM x 12MM HOLE

SKU: WDA072153
Excl. GST: $9.00
Incl. GST: $10.35
* Welder safety probam hood *

CRIMP LUG: 25MM x 12MM HOLE

SKU: WDA072154
Excl. GST: $0.00
Incl. GST: $0.00
DESRTIPTION Grimp Lug MODEL PART NUMBER LUG2512 SIZE 25.0mm x 12.0mm Hole WEIGHT NETT/GROSS 0.020kg VOLUME 0.0001cm

CRIMP LUG: 25MM x 10MM HOLE

SKU: WDA072155
Excl. GST: $0.00
Incl. GST: $0.00
DESRTIPTION Grimp Lug MODEL PART NUMBER LUG2512 SIZE 25.0mm x 10.0mm Hole WEIGHT NETT/GROSS 0.020kg VOLUME 0.0001cm

CRIMP LUG: 25MM x 8MM HOLE

SKU: WDA072156
Excl. GST: $0.00
Incl. GST: $0.00
DESRTIPTION Grimp Lug MODEL PART NUMBER LUG2512 SIZE 25.0mm x 8.0mm Hole WEIGHT NETT/GROSS 0.020kg VOLUME 0.0001cm

TIG TORCH: 4M COMPLETE

SKU: WDA100000
Excl. GST: $253.20
Incl. GST: $291.18
* This is the TIG welding torch with 4M of lead *

TIG ROD: SILICON BRONZE 2.4MM 1KG

SKU: WDA1000400
Excl. GST: $253.20
Incl. GST: $291.18
DESCRIPTION TIG Rod TYPE Silicon Bronze DIAMETER 2.4.0mm WEIGHT 1.0kg WEIGHT NETT/GROSS 1.0kg VOLUME 0.0006cm

TIG ROD: NICKEL SILVER-BRONZE FLUX COATED 3.2MM

SKU: WDA1000410
Excl. GST: $67.20
Incl. GST: $77.28
DESCRIPTION TIG Rod TYPE Nickel Silver/Nickel Bronze DIAMETER 3.2mm PER EACH 1 Piece WEIGHT NETT/GROSS 0.30kg VOLUME 0.0003cm

FEED ROLLERS: 30 X 18 X 10 1.6V-1.6K HELVI

SKU: WDA1000430
Excl. GST: $63.20
Incl. GST: $72.68
* These feed rollers are to suit the Helvi wire feed system *

MIG WELDING TIPS: 0.6/0.8/0.9M

SKU: WDM100240
Excl. GST: $6.05
Incl. GST: $6.96
DESCRIPTION Mig Welding Tip DESCRIPTION 0.6 0.8 0.9mm Tips DETAILS WEIGHT NETT/GROSS 0.001/0.010KG VOLUME 0.0001

WELDER: ARC Ai POWER WI-250 165A

SKU: WE-078810
Excl. GST: $299.00
Incl. GST: $343.85
* These Ai Power WI-250 Arc Welders are manufactured from quality materials * * Recitier is 1GBT * Intekigent digital core precision regulation . * Functional diversication ( Thust + thermal arc ) * Ignition + anti-sticking + memory. * Output current/ double display. * Suporting generator matching mode. * Equal current output with different input voltage. * Automatic start and stop fan for energy saving and high efficiency. * Overall protection of chassis.

WELDER: ARC Ai POWER WI-315 225A

SKU: WE-078812
Excl. GST: $260.00
Incl. GST: $299.00
* These Ai Power WI-315 Arc Welders are manufactured from quality materials * * Recitier is 1GBT * Intekigent digital core precision regulation . * Functional diversication ( Thust + thermal arc ) * Ignition + anti-sticking + memory. * Output current/ double display. * Suporting generator matching mode. * Equal current output with different input voltage. * Automatic start and stop fan for energy saving and high efficiency. * Overall protection of chassis.

WELDER: ARC Ai POWER WI-415 260A

SKU: WE-078814
Excl. GST: $425.00
Incl. GST: $488.75
* These Ai Power WI-415 Arc Welders are manufactured from quality materials * * Recitier is 1GBT * Intekigent digital core precision regulation . * Functional diversication ( Thust + thermal arc ) * Ignition + anti-sticking + memory. * Output current/ double display. * Suporting generator matching mode. * Equal current output with different input voltage. * Automatic start and stop fan for energy saving and high efficiency. * Overall protection of chassis.

WELDER: ARC RAZOR-200MMA

SKU: WE-078816
Excl. GST: $890.00
Incl. GST: $1,023.50
* Single phase DC welder MMA * Capable of TIG welding * Fan cooled with plug in cables * Thermol overload protection * Duty Cycle 200A @ 45% * Suit welding rods 2.5-4.0mm * * Tig torch optional * Voltage sence

WELDER: ARC EUROARC 170

SKU: WE-078822
Excl. GST: $525.00
Incl. GST: $603.75
DESCRIPTION Arc Welder = Euroarc 170 WELDING CURRENT 5-170Amp DUTY CYCLE 95Amp@100%;115Amp@60%;170Amp@20% INPUT VOLTAGE 230 Volt 1Phase INPUT CURRENT 5

WELDER: ARC HELVI GALILEO 175

SKU: WE-078827
Excl. GST: $825.00
Incl. GST: $948.75
* Optimum welding performance with all types of commercial electrodes * They come with overvoltage, over temperature and anti-sticking control * They are equipped with STICK / TIG (lift arc) selector * Can be connected to remmote power source with long connection cable * Ideal for maintenance jobs and workshop applications. * Made in Italy.

WELDER: ARC HELVI GALILEO 215

SKU: WE-078829
Excl. GST: $955.00
Incl. GST: $1,098.25
* Optimum welding performance with all types of commercial electrodes * They come with overvoltage, over temperature and anti-sticking control * They are equipped with STICK / TIG (lift arc) selector. * Can be connected to remmote power source with long connection cable * Ideal for maintenance jobs and workshop applications. * Made in Italy.

WELDER: ARC HELVI UNIVERSAL 400 MMA

SKU: WE-078831
Excl. GST: $2,800.00
Incl. GST: $3,220.00
* Three-phase DC welding units, on wheels, with cooling fan, suitable for welding all types of electrodes * Stepless control of the welding current by magnetic shunt * Made in Italy

WELDER: ARC HELVI UNIVERSAL 430 MMA

SKU: WE-078832
Excl. GST: $2,955.00
Incl. GST: $3,398.25
Three-phase DC welding units, on wheels, with cooling fan, suitable for welding all types of electrodes. Stepless control of the welding current by magnetic shunt. Made in Italy

WELDER: HELVI UNIVERSAL 430 MMA ACCESSORIES 15M LEADS & CLAMP

SKU: WE-078833
Excl. GST: $0.00
Incl. GST: $0.00
* This three-phase welding accessories are to suit the Helvi Universal 430 MMA welder * Consists onf earth clamp and 15 meters of heavy duty lead *

WELDER: ARC HELVI WELDER UNIVERSAL 430 MMA: WELD LEAD 15 METER

SKU: WE-078834
Excl. GST: $375.00
Incl. GST: $431.25
* This three-phase welding accessories are to suit the Helvi Universal 430 MMA welder * Consists of holder and 15 meters of heavy duty lead

ARC ELECTODE HOLDER: 500 AMPS LOCKING TYPE

SKU: WE-078836
Excl. GST: $65.00
Incl. GST: $74.75
* This 500amp electrode holder is the clamp type * Has a very strong spring clamping system to hold the electrode for welding * Bakalite handle with internal clamping for welding lead

ARC ELECTODE HOLDER: 500 AMPS

SKU: WE-078837
Excl. GST: $65.00
Incl. GST: $74.75
* This 500amp electrode holder is the clamp type * Has a very strong spring clamping system to hold the electrode for welding * Bakalite handle with internal clamping for welding lead

ARC ELECTODE HOLDER: 400A + 5 METERS CABLE

SKU: WE-078838
Excl. GST: $150.00
Incl. GST: $172.50
* This electrode holder comes with five metres of 400amp cable

ARC ELECTODE HOLDER: 400A WITH 8 METRE LEAD

SKU: WE-078839
Excl. GST: $249.00
Incl. GST: $286.35
* This three-phase welding accessories are to suit the Helvi Universal 430 MMA welder * Consists of holder and 15 meters of heavy duty lead and electrode hilder

ARC ELECTODE HOLDER: 300A CLAMP TYPE

SKU: WE-078839B
Excl. GST: $45.00
Incl. GST: $51.75
* This three-phase welding accessories are to suit the Helvi Universal 430 MMA welder * Consists of holder and 15 meters of heavy duty lead *

ARC EARTH LEAD 400A 5 METER W/HOLDER & MACHINE PLUG

SKU: WE-078840
Excl. GST: $150.00
Incl. GST: $172.50
* This three-phase welding accessories are to suit the Helvi Universal 430 MMA welder * Consists of holder and 15 meters of heavy duty lead

ARC EARTH LEAD 400A 8 METRE WITH H & PLUG

SKU: WE-078841
Excl. GST: $125.00
Incl. GST: $143.75
* This three-phase welding accessories are to suit the Helvi Universal 430 MMA welder * Consists of holder and 15 meters of heavy duty lead

CABLE CONNECTOR SOCKET: FEMALE

SKU: WE-078842
Excl. GST: $16.00
Incl. GST: $18.40
* This is a female cable conecting socket

CABLE CONNECTOR SOCKET: MALE

SKU: WE-078843
Excl. GST: $16.00
Incl. GST: $18.40
* This is a male cable conector and will suit most welders

WELDER: ARC PROJECT 160A 1PH

SKU: WE-078845
Excl. GST: $1,035.00
Incl. GST: $1,190.25
* Single or three phase portable Arc welder on wheels * Fan cooled with plug in cables * Thermostatic protection with continuous regulation of welding current * Suit welding rods 2.0-5.0mm * Top carrying or towing handle *

WELDER: CRIMPING LUG 500 AMPS 8 X 10MM

SKU: WE-078850
Excl. GST: $9.00
Incl. GST: $10.35
* This cable end lug is available in different hole sizes and different cable hole sizes for different size cable *

WELDER: CRIMPING LUG 500 AMPS 10 X 12MM

SKU: WE-078852
Excl. GST: $11.00
Incl. GST: $12.65
* This cable end lug is available in different hole sizes and different cable hole sizes for different size cable *

ARC WELDING KIT: 4M LEADS, HOLDER, EARTH CLAMP

SKU: WE-078860
Excl. GST: $140.00
Incl. GST: $161.00
* This are welding kit comprisese of 2 x 4 meter positive and negative leads fitted with plugs to welder , Electrode holder 500a, Earth clamp 300amp

EARTH WELDING CLAMP: 300AMP SPRING TYPE

SKU: WE-078864
Excl. GST: $11.00
Incl. GST: $12.65
* This spring loaded earth clamp is suitable for most small welders * Plated steel construction with strong clamping force for positive earthing when welding *

STAINLESS WELD CLEANER: EASYCLEAN PRO S-15

SKU: WE-078910
Excl. GST: $1,035.00
Incl. GST: $1,190.25
* The EASYkleen Pro S-15, incorporating the unmatched power of inverter technology of the simpliicity of the EASYkleen Brush * Using the same superior inverter technology of mepBLITz DT-15 and capable and impresive 130amps, the EASTkleen Pro S-15 is the most

BUTT WELDER: 1KVA 1PH SINIC

SKU: WEB178300
Excl. GST: $0.00
Incl. GST: $0.00
* This 1kva butt welder has a range 0.6 - 2.0mm round * Comes comp;ete on convenient mobile stand * Foot pedel to allow for hands free operation

BUTT WELDER: 3KVA 1PH SINIC

SKU: WEB178305
Excl. GST: $0.00
Incl. GST: $0.00
DESCRIPTION Butt Welder MODEL UN-3 RATED VOLTAGE 220v RATED INPUT CAPACITY 3 KVA RATED PRIMARY CURRENT 13.6 Amps RATED DUTY

BUTT WELDER: 10KVA 3PH SINIC

SKU: WEB178310
Excl. GST: $0.00
Incl. GST: $0.00
DESCRIPTION Butt Welder MODEL UN-10 RATED VOLTAGE 380v RATED INPUT CAPACITY 10kva RATED PRIMARY CURRENT 26 Amps RATED DUTY CYCLE

BUTT WELDER: 16KVA 3PH SINIC

SKU: WEB178315
Excl. GST: $0.00
Incl. GST: $0.00
DESCRIPTION Butt Welder MODEL UN-16 RATED VOLTAGE 380v RATED INPUT CAPACITY 16kva RATED PRIMARY CURRENT 42 Amps RATED DUTY CYCLE

BUTT WELDER: 25KVA 3PH SINIC

SKU: WEB178320
Excl. GST: $0.00
Incl. GST: $0.00
DESCRIPTION Butt Welder MODEL UN-25 RATED VOLTAGE 380v RATED INPUT CAPACITY 25 kva RATED PRIMARY CURRENT 66 Amps RATED DUTY

BUTT WELDER: 40KVA 3PH SINIC

SKU: WEB178325
Excl. GST: $0.00
Incl. GST: $0.00
DESCRIPTION Butt Welder MODEL UN-40 RATED VOLTAGE 380v RATED INPUT CAPACITY 40 kva RATED PRIMARY CURRENT 105 Amps RATED DUTY

STUD WELDER: 500W 230V 1PH 50HZ CAPACITY 3-6MM

SKU: WEB178400
Excl. GST: $2,100.00
Incl. GST: $2,415.00
* This SRS-1600 stud welder features modern styling and a compact unit Widly used in the manufacture of electrical cabinets and sheetmetal processing * This model incorperates the international advanced knod adjustment mode operation and microcomputer precision control * Voltage adjustment precision is up to 1V Micrcomputer control tempreturedetection Automatic stop for machines overheating protection

STUD WELDER: 500W 230V 1PH 50HZ CAPACITY 3-8MM

SKU: WEB178405
Excl. GST: $2,300.00
Incl. GST: $2,645.00
* This SRS-2500 stud welder features modern styling and a compact unit * Widely used in the manufacture of electrical cabinets and sheetmetal processing * This model incorperates the international advanced knod adjustment mode operation and microcomputer precision control * Voltage adjustment precision is up to 1V * Micrcomputer control tempreturedetection * Automatic stop for machines overheating protection

STUD WELDER: 800W 230V 50HZ 1PH CAPACITY 3-10MM

SKU: WEB178410
Excl. GST: $2,980.00
Incl. GST: $3,427.00
* This SRS-3500 stud welder features modern styling and a compact unit Widly used in the manufacture of electrical cabinets and sheetmetal processing * This model incorperates the international advanced knod adjustment mode operation and microcomputer precision control * Voltage adjustment precision is up to 1V Micrcomputer control tempreturedetection Automatic stop for machines overheating protection

STUD WELDER: 1500W 380V 50HZ 3PH CAPICITY 3-12MM

SKU: WEB178415
Excl. GST: $3,870.00
Incl. GST: $4,450.50
* This ARC-1010i stud welder features modern styling and a compact unit Widly used in the manufacture of electrical cabinets and sheetmetal processing * This model incorperates the international advanced knod adjustment mode operation and microcomputer precision control * Voltage adjustment precision is up to 1V Micrcomputer control tempreturedetection Automatic stop for machines overheating protection

STUD WELDER: 2500AMP 414V 3PH 50HZ CAPACITY 6-25MM

SKU: WEB178440
Excl. GST: $9,870.00
Incl. GST: $11,350.50
* Inverter type soft switching technology * Small size, energy saving, efficient EMI design * Torch cable can be extended * High load substainability and high fatigue resistance * This is a multi purpose machine for, manual welding, Automatic welding * The fuction of arc welding and carbon arc gouging can be customised * The welding material can be: carbon steel, low alloy steel, copper and other arc material with arc weldability. * No deformation or bumps during this process * Simple controls and easy to use

STUD WELDER: RS-25

SKU: WEB178470
Excl. GST: $1,500.00
Incl. GST: $1,725.00
DESCRIPTION Stud Welder MODEL RS-25 RATED VOLTAGE RATED INPUT CAPACITY RATED PRIMARY CURRENT RATED DUTY CYCLE NO LOAD VOLTAGE MAX

STUD WELDER GUN: RSN-2500 + CABLE LH-20

SKU: WEB178480
Excl. GST: $980.00
Incl. GST: $1,127.00
* This is the Sinic Stud Welding Gun * Gun only

STUD WELDER CONTROL BOARD: 500W

SKU: WEB178482
Excl. GST: $980.00
Incl. GST: $1,127.00
This control board is to suit the RSR-2500 stud welder

LH-20: CABLE 4-PIN AVIATION PLUG

SKU: WEB178490
Excl. GST: $38.00
Incl. GST: $43.70
* This avation plug is to suit the cable on the LH-20 stud welding gun

LH-20: COLLET 13.0MM STUD GUN (BRASS)

SKU: WEB178500
Excl. GST: $48.00
Incl. GST: $55.20
* This collet is to suit the LH-20 stud welding gun

LH-20: COLLET 16.0MM STUD GUN (BRASS)

SKU: WEB178502
Excl. GST: $48.00
Incl. GST: $55.20
* This collet is to suit the LH-20 stud welding gun

LH-20: COLLET 19.0MM STUD GUN (BRASS)

SKU: WEB178504
Excl. GST: $48.00
Incl. GST: $55.20
* This collet is to suit the LH-20 stud welding gun

LH-20: COLLET 22.0MM STUD GUN (BRASS)

SKU: WEB178506
Excl. GST: $48.00
Incl. GST: $55.20
* This collet is to suit the LH-20 stud welding gun

LH-20: COLLET 25.0MM STUD GUN (BRASS)

SKU: WEB178508
Excl. GST: $48.00
Incl. GST: $55.20
* This collet is to suit the LH-20 stud welding gun

LH-20: SUPPORTING PLATE 16.0MM (BRASS) 6PC PACK

SKU: WEB178520
Excl. GST: $24.00
Incl. GST: $27.60
* This supporting plate is to suit the LH-20 stud welding gun

LH-20: SUPPORTING PLATE 19.0MM (BRASS) 6PC PACK

SKU: WEB178522
Excl. GST: $24.00
Incl. GST: $27.60
* This supporting plate is to suit the LH-20 stud welding gun

LH-20: SUPPORTING PLATE 22.0MM (BRASS) 6PC PACK

SKU: WEB178524
Excl. GST: $24.00
Incl. GST: $27.60
* This supporting plate is to suit the LH-20 stud welding gun

LH-20: SUPPORTING PLATE 25.0MM (BRASS) 6PC PACK

SKU: WEB178526
Excl. GST: $24.00
Incl. GST: $27.60
* This supporting plate is to suit the LH-20 stud welding gun

LH-20: PORCELAIN RING 16.0MM

SKU: WEB178530
Excl. GST: $0.00
Incl. GST: $0.00
* This porcelain ring is to suit the LH-20 stud welding gun

LH-20: PORCELAIN RING 19.0MM

SKU: WEB178532
Excl. GST: $0.00
Incl. GST: $0.00
* This porcelain ring is to suit the LH-20 stud welding gun