Miller MTL-20 Torches, Owner'S Manual

Page 1: ... you do not understand the directions For help call your distributor or MILLER Electric Mfg Co P O Box 1079 Appleton WI 54912 414 734 9821 Water Cooled Torches For GTAW Welding Rated At 250 Amperes 100 Duty Cycle Using Argon Shielding Gas 020 Thru 5 32 in 0 5 Thru 4 0 mm Tungsten Size Capacity Includes 12 1 2 Or 25 ft 3 8 Or 7 6 m Cable Remote Contactor And Current Control Available Tungsten Elect...

Page 2: ...en axed tsr operation outside of the specifications br the equipment MILLER PRODUCTS ARE INTENDED FOR PURCHASE AND USE BY COMMER CIALINDUSTRIAL USERS AND PERSONS TRAINED AND EXPERIENCED IN THE USE AND MAINTENANCE OP WELDING EQUIPMENT In the event of a warranty claim covered by this warranty the exclusixe remedies shall be at MILLER S option 11 repair or 2 replacement or where authorized in writing...

Page 3: ...ore complete safety information found in the welding power source Owners Manual Read and follow all safety precautions HAVE ALL INSTALLATION OPERATION MAINTENANCE AND QUALIFIED PEOPLE ELECTRIC SHOCK can kill REPAIR WORK PERFORMED ONLY BY A NOTE D Considerations About Welding And The Effects Of Low Frequency Electric And Magnetic Fields The following is a quotation from the General Conclusions Sect...

Page 4: ......

Page 5: ... can happen CAUTION means possible minor injury or equipment damage can happen 3 Statement Of Hazard And Result 4 Safety Instructions To Avoid Hazard 5 Hazard Symbol If Available 6 Safety Banner Read safety blocks for each sym bol shown 7 NOTE Special instructions for best oper ation not related to safety Turn Off switch when using high frequency Specification Model Description Description MT Mill...

Page 6: ...er Assembling Torch Body 7 Flex Lok Head 8 Heat Shield 9 Backcap Long Backcap Shown 10 0 Ring Installing Tungsten To adjust tungsten position loosen backcap Keep connections tight Replace cup heat shield backcap and 0 rings if cracked wlwacnB r 8 93 0 Definition Duty Cycle is percentage of 10 10 minutes that torch can weld at rated load without overheating Minutes 100 Duty Cycle At 250 Amperes Usi...

Page 7: ...ge torch Do not use hand tools to adjust torch flex bk head Hold stem and turn head one full turn 1 Stem 2 Head Turn head and stem to desired angle Figure 3 2 Adjusting Flex Lok Head Ret ST 14 477 B I Hold stem and turn head until tight OM 1568 Page 3 ...

Page 8: ...a black surface oxidizing After welding allow 10 seconds of gas postflow for every 100 am peres of weld current 8 Coolant In Hose 9 Power Cable Coolant Out Hose 10 Power Cable Adapter Connect hoses to adapter before connecting adapter to weld output terminal 11 Cooling System Mix coolant according to cooling system owners manual Torch is rated at 1 qtimin 0 94U mm coolant flow rate Maintain proper...

Page 9: ...only a mix of pure ethylene glycol and distilled or deionized water such as MILLER coolant Part No 128 705 or equivalent DO NOT USE AUTOMOTIVE ANTIFREEZE Follow these guidelines to de crease corrosion in torch and cool ing system Material in contact with coolant can only be brass copper silver solder 300 Series stainless steel or plastic 1 Coolant See table for coolant mixture need ed for operatin...

Page 10: ...gh frequency control and if necessary check and adjust spark gaps Wandering arc poor control of direction of arc Reduce gas flow rate according to welding power source Owners Manual Tungsten electrode oxidizing and not remaining bright after conclusion of weld Shield weld zone from drafts Check and tighten all gas fittings Increase postflow time according to welding power source Owners Manual Chec...

Page 11: ... Using High Freq Pure Tungsten Green Band 010 Uptol5 Uptol5 UptolO 020 5 20 5 20 10 20 040 15 80 10 60 20 30 1 16 70 150 10 20 50 100 30 80 3 32 125 225 15 30 100 160 60 130 1 8 225 360 25 40 150 210 100 180 5 32 360 450 40 55 200 275 160 240 3 16 450 720 55 80 250 350 190 300 1 4 720 950 80 1 25 325 450 250 400 2 Thorium Alloyed Tungsten Red Band 010 Upto25 Upto2O Upto 15 020 15 40 15 35 5 20 040...

Page 12: ...Preparing Tungsten For DC Electrode Negative OCEN Welding 1 Tungsten Electrode 2 Balled End N Ball end of tungsten before welding by applying either an ac amperage Electrode Diameter mendedforagiven electrode diam ______________________ 1 1 2 Times slightly higher than what is recom eter see Table 5 1 or a dc elec trode positive amperage 2 Ref S 0161 p 2 2 1 2 Times Electrode Diameter 1 Tungsten E...

Page 13: ...0 RING 1 11 116 204 FLWB FLEX LOC TORCH BODY consisting of 1 12 116217 01 0002 O R1NG 2 13 117 585 HANDLE 1 14 116 267 212AH GAS HOSE 12 1 2 ft consisting of 1 14 116 268 225AH GAS HOSE 25ft consisting of 1 15 116512 HOSE black 1 8 ID order by ft As Reqd 16 116266 2AN GASNUT 1 17 116 269 3HF HOSE FITTING 1 18 116 232 212WH WATER HOSE 12 1 2ft consisting of 1 18 116 233 225WH WATER HOSE 25ft consis...

Page 14: ...as Lens Collet Model No 3GLL332 3GLL418 3GLL532 Body Lg 0 a Stock No 119902 119 903 119 904 5 16 3 8 7 16 1 4 5 16 3 8 Mouei plo Stock No Model No Stock No Slock Model No 116337 2C4 116338 ______ 116339 2C6 ___________________________ 116 340 2C7 ________________ 116 326 116 327 2C4L 116 328 2C5L 6 329 2C6L 116 310 2A4 2A5 ____________________ 2 2A6 ________________________ 3 8 2A7 _______________...

Page 15: ...0 116350 3C6 105Z44 116357 4CB116 17CB20 116351 3C7 105Z45 116358 4CB332 17CB20 116352 3C8 08N78 116359 4CB418 17CB20 116 353 3C10 08N79 116 360 4CB532 N A 116354 3C12 08N80 116337 2C4 13N14 116343 3C4L 12N03 116338 2C5 13N15 116344 3C5L 105Z60 116339 2C6 13N16 116345 3C6L 12N02 116340 2C7 13N17 116346 3C7L 105Z61 116341 2C8 13N18 116330 3A4 10N50 116342 2C10 13N19 116331 3A5 10N49 116326 2C3L 796...

Page 16: ......

Page 17: ...TENSION BOX For use with water cooled torches CEB non fused 120 797 CEB26OFA 116161 Fused up to 260 Amps CEB 550FA 260 to 550 Amps Designed to allow a water cooled torch hose and cable assembly to be extended from the power source Available with or without fuse protec tion All components are protected by a strong non conductive enclo sure Note Hose and cables from power source to CEB box are not s...

Page 18: ... inlet connector for use with argon and argon CO2 gases The AF 1 50 is ad justable for gas delivery of 8 25 SCFH with argon gas TIG ACCESSORY KITS TAK Accessory kits include one backcap and three each of the following collet collet body alumina cup and 2 throriated tungsten pieces Reinforced plastic cable covers made of tear and flame resistant material A large and small cover is available in leng...