Miller MIGmatic M-25 Owner's Manual
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Miller MIGmatic M-25 Owner's Manual

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MIGmatic M-25
OM-227 796D
Processes
MIG (GMAW) Welding
Flux Cored (FCAW) Welding
Description
Semi-Automatic, Air-Cooled
MIG (GMAW) Welding Gun
™
File: MIG (GMAW)
2018−09

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Summary of Contents for Miller MIGmatic M-25

  • Page 1 OM-227 796D 2018−09 Processes MIG (GMAW) Welding Flux Cored (FCAW) Welding Description Semi-Automatic, Air-Cooled MIG (GMAW) Welding Gun MIGmatic M-25 ™ File: MIG (GMAW) For product information, Owner’s Manual translations, and more, visit www.MillerWelds.com...
  • Page 2 We know you don’t have time to do it any other way. That’s why when Niels Miller first started building arc welders in 1929, he made sure his products offered long-lasting value and superior quality.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION 1 −SAFETY PRECAUTIONS FOR GMAW WELDING GUNS − READ BEFORE USING ..1-1. Symbol Usage ............... 1-2.

  • Page 5: Section 1 −Safety Precautions For Gmaw Welding Guns − Read Before Using

    SECTION 1 −SAFETY PRECAUTIONS FOR GMAW WELDING GUNS − READ BEFORE USING SR7 (MIG) 2018-01 Protect yourself and others from injury — read, follow, and save these important safety precautions and operating instructions. 1-1. Symbol Usage DANGER! − Indicates a hazardous situation which, if Indicates special instructions.

  • Page 6: Proposition 65 Warnings

    NOISE can damage hearing. READ INSTRUCTIONS. D Read and follow all labels and the Owner’s Noise from some processes or equipment can damage hearing. Manual carefully before installing, operating, or servicing unit. Read the safety information at D Check for noise level limits exceeding those the beginning of the manual and in each specified by OSHA.

  • Page 7: Utilisation

    SECTION 2 − MESURES DE SÉCURITÉ VISANT LES PISTOLETS DE SOUDAGE GMAW − À LIRE AVANT UTILISATION SR7(MIG)_2018−01_fre Pour écarter les risques de blessure pour vous−même et pour autrui — lire, appliquer et ranger en lieu sûr ces consignes relatives aux précautions de sécurité...

  • Page 8: Proposition Californienne 65 Avertissements

    D Avoir recours à des écrans protecteurs ou à des rideaux pour D Utiliser des bouche-oreilles ou des serre-tête antibruit approuvés si protéger les autres contre les rayonnements les éblouissements le niveau de bruit est élevé. et les étincelles ; prévenir toute personne sur les lieux de ne pas D Avertir les personnes à...

  • Page 9: Section 2 − Installation

    SECTION 3 − INSTALLATION 3-1. Specifications Air-Cooled Welding Gun For GMAW And FCAW Welding Note: Using gasless flux cored wire reduces gun duty cycle. M-25 Feeds .023 To .045 in. (0.6 To 1.1 mm) Hard Or Flux Cored Wires Duty Cycle Rating: 100%: 250 A With CO Shielding Gas;...

  • Page 10: Installing Gun

    3-3. Installing Gun Gun Securing Knob Gun End Loosen knob. Insert gun end until it bottoms against drive assembly. Tighten knob. Gun Trigger Plug Insert into receptacle, and tighten threaded collar. Friction Terminals Some applications will require cutting off trigger plug and installing 0.250 female friction terminals onto end of leads.

  • Page 11: Section 4 − Maintenance & Troubleshooting

    SECTION 5 − MAINTENANCE & TROUBLESHOOTING 5-1. Removing Nozzle, Contact Tip, And Adapter, Changing Liner, And Cleaning Gun Casing Turn off welding power source/wire feeder. Nozzle Contact Tip Tip Adapter Head Nozzle Adapter Tube Wire size stamped on tip − check and match wire size.

  • Page 12: Replacing Switch And/Or Head Tube

    5-2. Replacing Switch And/Or Head Tube Turn Off welding power source /wire feeder and disconnect gun. Remove handle locking nut. Slide handle. 4 Remove screw. Remove switch housing. Install new switch and connect leads (polarity is not important). Reassemble in reverse order. If replacing head tube, continue to end of figure.

  • Page 13: Routine Maintenance

    5-3. Routine Maintenance Disconnect power Maintain more often before maintaining. during severe conditions. n = Check Z = Change ~ = Clean l = Replace Reference * To be done by Factory Authorized Service Agent Each Spool Of Wire n~ Nozzle and contact tip ~ Blow out gun casing Every Months...

  • Page 14: Section 5 − Parts List

    SECTION 6 − PARTS LIST 804 467-B Figure 6-1. M-25 Gun Item Dia. Part Mkgs. Description Quantity Figure 6-1. M-25 Gun ... . . 200258 NOZZLE, slip type .500 orf flush .
  • Page 15 Item Dia. Part Mkgs. Description Quantity Figure 6-1. M-25 Gun (Continued) ... . . 169738 NUT, locking handle ..........
  • Page 16 Notes Work like a Pro! Pros weld and cut safely. Read the safety rules at the beginning of this manual.
  • Page 17 Notes Ref. AWS/ANSI D1.1 WELD JOINT TYPES GROOVE FILLET WELD POSITION: FLAT BUTT T−JOINT HORIZONTAL BUTT T−JOINT VERTICAL BUTT T−JOINT OVERHEAD BUTT T−JOINT Ref. 804 248-A...
  • Page 18 Notes...
  • Page 19 Effective January 1, 2018 (Equipment with a serial number preface of MJ or newer) This limited warranty supersedes all previous Miller warranties and is exclusive with no other guarantees or warranties expressed or implied. Warranty Questions? LIMITED WARRANTY − Subject to the terms and conditions below, 6 Months —...
  • Page 20 Contact the Delivering Carrier to: File a claim for loss or damage during shipment. For assistance in filing or settling claims, contact your distributor and/or equipment manufacturer’s Transportation Department. © ORIGINAL INSTRUCTIONS − PRINTED IN USA 2018 Miller Electric Mfg. LLC 2018−01...

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