SEMIAUTOMATIC WIRE FEEDERS LF-72 and LF-74 Wire Feeders Processes MIG, Pulsed MIG, Flux-Cored Product Number LF-72 LF-74 See page 6 for specs on all models 2-Roll or 4-Roll Heavy Duty Industrial Feeders Designed for MIG and cored wire welding in job shop and manufacturing environments, the rugged LF-72 and LF-74 wire feeders are built to deliver reliable performance day after day. Input Power 24-42 VAC 50/60 Hz 9 Amps Rated Output LF-72 500 Amps @ 60% Duty Cycle LF-74 600 Amps @ 60% Duty Cycle Wire Size Range Solid: .023-1/16 in. (0.6-1.6 mm) Cored: .030-5/64 in. (0.8-2.0 mm) Weight/Dimensions (H x W x D) (See page 6) Wire Feed Speed Range ipm (m/min) 50-800 (1.3-20.3) APPLICATIONS Heavy Equipment Fabrication Job Shop FEATURES Patented MAXTRAC® heavy-duty cast aluminum wire drive system provides reliable feeding and durability. Brass-to-brass gun connections for better electrical conductivity that results in better arc performance. Totally tool-less drive rolls and wire guide installation. Two or four geardriven wire drive rolls slide on and off easily! Calibrated wire feed speed dial for precise and accurate settings. CV-305, CV-400-I, CV-400, CV-500-I, CV-655, Invertec® V350-PRO, Invertec® V450-PRO, DC-400, DC-600, DC-655 (requires K2335-1 competitive adapter) Deltaweld(1), Dimension(1), XMT(1) and CP302(1) (1) Trademarks of the Miller Electric Manufacturing Company ISO 9001:2000 14001:2004 THE LINCOLN ELECTRIC COMPANY Publication E8.11 | Issue Date 8/09 © Lincoln Global, Inc. All Rights Reserved. 22801 St. Clair Avenue • Cleveland, OH U.S.A. • 44117-1199 PH: +1.216-481-8100 • www.lincolnelectric.com OUTPUT INPUT IN CO LN ELECT RI C RECOMMENDED COMPETITIVE (1) POWER SOURCES WHAT’S INCLUDED All LF-72 and LF-74 Units Include: .035-.045 in. (0.9-1.2 mm) drive roll and wire guide kit. Select Units Include (see page 6): 10 ft. (3.0 m) control cable with 14-pin female connector. 15 ft. (4.5 m) Magnum® PRO 350 gun and cable assembly with .035-.045 in. (0.9 mm-1.2 mm) liner. Standard-Duty wire reel stand. Heavy-Duty wire reel stand. L RECOMMENDED LINCOLN ELECTRIC POWER SOURCES Shown with options: See page 4 for all models Two Year Extended Warranty Available. KEY CONTROLS 1. Calibrated Wire Feed Speed Dial 2. Gun Connection (K1500-2) 3. 5-Pin Gun Connection 8. 1. (optional) 4. Motor Thermal Protection Light 5. Cold Feed/Gas Purge Switch 6. 2-Step/Trigger Interlock Switch 7. Burnback/Postflow Timer Kit (optional) 7. 2. (optional) 8. Remote Voltage Control Kit (optional) 6. 5. 4. 3. FEATURES Front View Convenient spare parts reference chart. Quick release spoolholder Heavy duty hinged door opens upward to provide generous access to wire drive. Convenient storage tray on top for contact tips and drive rolls. Heavy Duty Wire Reel stand allows spool sizes up to 60 lbs. Rugged MAXTRAC® wire drive system. Welding cable strain relief LF-74 Four Roll Bench Model Shown Back View All models except K2327-4 Back View LF-72 (K2327-4) Gas hose connection inlet. Control cable connector with Spin-Nut™ for fast, easy, toolless connection. Patented ball bearing inlet guide for accurate feeding. [ 2 ] | LF-72 and LF-74 PERFORMANCE ® Patented Dual Spring Pressure Arm • Easy turn numeric tension indicator • Set heavy tension for solid steel and stainless steel wire • Set moderate tension for cored wires • Set soft tension for aluminum wire Rigid Cast Aluminum Frame • Wide idler arm hinge delivers improved drive roll clamping pressure • Enhances precise drive roll alignment Twist-Lock Drive Roll Hubs • Two or four gear driven rolls • Fast, tool-less changeovers Patented Split Wire Guides • Full support for wire throughout the drive path • Removable outer wire guide for easy access • No tools required • No birdnesting Brass to Brass Interchangeable Gun Bushings LF-74 Four Roll Drive • More reliable electrical conductivity – no oxide build-up • More efficient energy transfer – lower voltage drops • Easily adapt any number of Lincoln Magnum®, Magnum® PRO or competitive guns LF-72 Two Roll Drive New Patented Drive Rolls • For steel - new design delivers 20% more feeding force Separate Drive Gear • For aluminum - chrome plated to resist build-up • Reduces pressure on motor for extended service life LF-72 and LF-74 | [ 3 ] OPTIONS DRIVE ROLL & WIRE GUIDE KITS LF-72 Two-Roll Description CONTROL EXTENSION CABLES LF-74 Four-Roll Cable Type Solid Wire Sizes (includes stainless steel): .023-.030 in. (0.6-0.8 mm) .035 in. (0.9 mm) .040 in. (1.0 mm) .045 in. (1.2 mm) .052 in. (1.4 mm) .035, .045 in. (0.9, 1.2 mm) 1/16 in. (1.6 mm) .030-.035 in. (0.8-0.9 mm) .045 in. (1.2 mm) 052 in. (1.4 mm) 1/16 in. (1.6 mm) .068-.072 in. (1.8 mm) 5/64 in. (2.0 mm) 3/32 in. (2.4 mm) .035 in. (0.9 mm) .040 in. (1.0 mm) 3/64 in. (1.2 mm) 1/16 in. (1.6 mm) KP1696-030S KP1696-035S KP1696-2 KP1696-045S KP1696-052S KP1696-1(1) KP1696-1/16S Cored Wire Sizes: KP1697-035C KP1697-045C KP1697-052C KP1697-1/16C Solid or Cored Wire Sizes: KP1697-068 KP1697-5/64 – Aluminum Wire Sizes: KP1695-035A KP1695-040A KP1695-3/64A KP1695-1/16A Description Wire Feeder Control Extension Cables KP1505-030S KP1505-035S KP1505-040S K1797-10 - 10 ft. (3 m)(1) K1797-25 - 25 ft. (7.6 m) Male 14-pin to female 14-pin K1797-50 - 50 ft. 15 m) KP1505-045S KP1505-052S – KP1505-1/16S K1797-100 - 100 ft. (30 m) (1) KP1505-035C KP1505-045C KP1505-052C KP1505-1/16C Standard with all LF-72 (except K2327-4) and LF-74 models. WELD CABLE REQUIRED WELD CABLES KP1505-068 KP1505-5/64 KP1505-3/32 KP1507-035A KP1507-040A KP1507-3/64A KP1507-1/16A Order No. Description K1840-10 Twist-Mate™ to Lug, 1/0, 350A, 60% duty cycle, 10 ft. K1842-10 Lug to Lug, 3/0, 600A, 60% duty cycle, 10 ft. (3.1 m) K1842-35 Lug to Lug, 3/0, 600A, 60% duty cycle, 35 ft. (10.7 m) K1842-60 Lug to Lug, 3/0, 600A, 60% duty cycle, 60 ft. (18.3 m) K1842-110 Lug to Lug, 4/0, 600A, 60% duty cycle, 110 ft. (33.5 m) (1) Standard on LF-72. FEED PLATE GUN RECEIVER BUSHINGS K1500-1 Gun Receiver Bushing (Optional) Magnum® PRO 250, 350 and 450 or Magnum® 200, 300 and 400 gun and cable assemblies with K466-1 connector kit. Magnum® Self-shielded Innershield® gun and cable assembly. Magnum® PRO 550 or Magnum® 550 gun and cable assembly with K613-1 connector kit. K1500-2 Gun Receiver Bushing (Standard) K1500-3 Gun Receiver Bushing (Optional) K1500-4 Gun Receiver Bushing (Optional) K1500-5 Gun Receiver Bushing (Optional) K489-7 Fast-Mate™ Gun Receiver Bushing (Optional) Magnum® PRO 350 Gun Package with 035-045 liner and K466-10 connector kit (K2652-2-10-45) Magnum® PRO 550 or Magnum® 550 gun and cable assembly with K613-7 connection. Magnum® PRO 250, 350 and 450 or Magnum® 200, 300 and 400 gun and cable assemblies with K466-3 connector kit. To adapt to OXO® guns. Magnum® gun and cable assemblies with Fast-Mate connections. Magnum® PRO 450 Gun Package with 035-045 liner and K466-10 connector kit (K2653-2-10-45) Guns with Tweco® #5 connectors. Magnum® 200 and 400 fully assembled guns (K497-2x and K471-2x). Magnum® PRO 250, 350 and 450 or Magnum® 200, 300 and 400 gun and cable assemblies with K466-10 connector kit. Guns with Tweco® #2, #3, and #4 connectors. [ 4 ] | LF-72 and LF-74 Handles both single and dual procedure guns. RECOMMENDED ACCESSORIES TO EXPAND MACHINE CAPABILITIES GENERAL OPTIONS Magnum® PRO Gun and Cable Assemblies 250-550 amps, air-cooled, gas-shielded welding guns. See publication E12.01 Magnum® Self-Shielded Innershield® Gun and Cable Assemblies Available 200-550 amps, air-cooled, gas-shielded welding guns. See publication E12.10 Magnum® Self-Shielded Innershield® Gun and Cable Assemblies Available 250-600 amps. See publication E12.110 Postflow and Burnback Timer Kit Provides adjustable delay of power source output shut off to prevent electrode sticking in crater when using high wire feed speeds. Order K2330-1 Remote Voltage Control Kit Allows arc voltage to be changed at the feeder. Order K2329-1 Incoming Bushing for Lincoln Conduit Feed Plate Incoming Bushings connect directly to wire conduit (not included), for use in boom system, long distances, or large payoff packages. Bushings can be used with any wire conduit (K515 or K565). Order K1546-1 for .025-1/16 in. (0.6 - 1.6 mm) wire Order K1546-2 for 1/16-1/8 in. (1.6 - 3.2 mm) wire Spindle Adapter for Readi-Reels® and Spools For fixture and other custom installations. Features 2 in. (51 mm) O.D. spindle for mounting Readi-Reels® and 2 in. (51 mm) I.D. spools up to 60 lb. (27.2 kg) capacity. Order K162-1 Deluxe Adjustable Gas Regulator & Hose Kit Accommodates CO2, Argon, or Argon-blend gas cylinders. Includes a cylinder pressure gauge, dual scale flow gauge and 4.3 ft. (1.3 m) gas hose. Order K586-1 Harris® Argon Flowmeter/ Regulator and Hose Kit Order 3100211 Adapter for Competitive Power Sources Allows wire feeder to connect to select Miller Electric® power sources. Order K2335-1 Control Cable to Terminal Strip Adapter Connects 14-pin control cable to power sources with terminal strip. Order K1798 115V/42V Transformer Kit Provides a way to use the wire feeder on power sources that have 115V AC available on the terminal strip. Order K1520-1 Wire Reel Cover Kit Plastic enclosure for up to 44 lb. (20 kg) wire packages. Order K1634-1 ADDITIONAL OPTIONS FOR FEEDERS EQUIPPED WITH HEAVY DUTY WIRE REEL STAND Insulated Lift Bail Allows the entire wire feeder to be hung from a crane or hook. Use with Heavy Duty Wire Reel Stand. Order K1555-1 Caster Kit — Light Duty Mounts to the Heavy Duty Wire Reel Stand. Allows for easy movement of wire feeder. Order K1556-1 Welding Fume Extractors Lincoln offers a wide variety of welding fume extraction environmental system solutions, ranging from portable systems easily wheeled around the shop to shopwide central systems servicing many dedicated welding stations. Request Publication E13.40 Undercarriage Includes mounting frame, front casters, rear wheels and handle for hand towing. For use with Wire Reel Stands. Order K163 ADDITIONAL OPTIONS FOR BASE MODEL (DOES NOT INCLUDE WIRE REEL STAND) 50-60 lb. Coil Adapter Adapts 50-60 lb. (22.6-27.2 kg) coils of Lincoln wire to 2 in. (51 mm) spindle. Order K1504-1 Standard Duty Wire Reel Stand For use with Lincoln 10-44 lb. (4.5-20 kg) wire packages that use a 2 in. (51 mm) spindle. Order K2328-1 Heavy Duty Wire Reel Stand For use with Lincoln 10-60 lb. (4.5-27.2 kg) wire packages that use a 2 in. (51 mm) spindle. Hole in stand fits over lift bail. Order K1524-3 ADDITIONAL OPTIONS FOR FEEDERS EQUIPPED WITH STANDARD DUTY WIRE REEL STAND Swivel Platform Mounts to the lift bail on the power source and bottom of the Heavy Duty Wire Reel stand. Wire feeder may be lifted off if needed. Compatible with Light Duty Caster Kit. Includes “lazy susan” parts tray. Order K1557-1 14 lb. Innershield® Coil Adapter Permits 14 lb. (6 kg) Innershield® electrode coils to be mounted on 2 in. (51 mm) O.D. spindles. Order K435 8" O.D. Spool Adapter Permits 8 in. (200 mm) O.D. spools to be mounted on 2 in. (51 mm) O.D. spindles. Order K468 LF-72 and LF-74 | [ 5 ] Plastic Wire Cover Kit Plastic enclosure for up to 60 lb. (27.2 kg) wire packages. Order K1634-2 NOTE: Miller Electric® is not a trademark of The Lincoln Electric Company. WIRE FEEDER SELECTION GUIDE LF-72 Base Model (no gun, no control cable) (K2327-4) LF-72 Number of Rolls: LF-72 Bench Model, Standard Duty (K2327-5) LF-72 Bench Model, Heavy Duty (K2327-6) Shown with optional wire. Shown with optional wire. LF-72 Bench Model, Heavy Duty (no gun) (K2327-7) Shown with optional wire. Inches Per Minute (m/min): 50-800 (1.3-20.3) Wire Size: in. (mm) Solid .023-1/16 (0.6-1.6) Cored .030-5/64 (0.8-2.0) LF-74 Number of Rolls: For boom mounting or for use with bulk consumables. For most welding needs that require a rugged and dependable wire feed system. For applications requiring up to 60 lb. wire packages. For applications requiring up to 60 lb. wire packages. Unit Includes: • Drive Roll and Wire Guide Kit .035-.045 Unit Includes: • Drive Roll and Wire Guide Kit .035-.045 • Magnum® PRO 350 Gun and Cable Assembly • Control Cable 10' (3 m) Unit Includes: • Drive Roll and Wire Guide Kit .035-.045 • Magnum® PRO 350 Gun and Cable Assembly • Control Cable 10' (3 m) Unit Includes: • Drive Roll and Wire Guide Kit .035-.045 • Control Cable 10' (3 m) LF-74 Base Model (no gun) (K2426-4) LF-74 Bench Model, Heavy Duty (no gun) (K2426-5) Shown with optional wire. Inches Per Minute (m/min): 50-800 (1.3-20.3) Wire Size: in. (mm) Solid .023-1/16 (0.6-1.6) Cored .030-5/64 (0.8-2.0) For boom mounting or for use with bulk consumables. For applications requiring up to 60 lb. wire packages. Unit Includes: • Drive Roll and Wire Guide Kit • Control Cable 10' (3 m) Unit Includes: • Drive Roll and Wire Guide Kit • Control Cable 10' (3 m) • Heavy Duty Wire Reel Stand PRODUCT SPECIFICATIONS Product Name Product Number Input Power Output Capacity Current / Duty Cycle LF-72 Base Model (w/o gun or cable) LF-72 Bench Model Standard Duty LF-72 Bench Model Heavy Duty LF-72 Bench Model Heavy Duty (w/o gun) LF-74 Base Model K2327-4 24-42 VAC 50/60 Hz 9 Amps 500 Amps @ 60% LF-74 Bench Model Heavy Duty K2327-5 Wire Size Range In. (mm) Wire Feed Speed Range ipm (m/min.) 50-800 (1.3-20.3) Solid .023-1/16 (0.6-1.6) Cored .030-5/64 (0.8-2.0) K2327-6 K2327-7 K2426-4 600 Amps @ 60% K2426-5 HxWxD inches (mm) Net Weight lbs. (kg) 11.1 x 10.2 x 12.9 (282 x 259 x 328) 12.6 x 10.9 x 22.5 (320 x 277x 572) 15.3 x 13.0 x 27.7 (389 x 330 x 704) 15.3 x 13.0 x 27.7 (389 x 330 x 704) 11.1 x 10.2 x 12.9 (282 x 259 x 328) 15.3 x 13.0 x 27.7 (389 x 330 x 704) 24 (11) 52 (24) 69 (31) 63 (29) 27 (12) 63 (29) For best welding results with Lincoln Electric equipment, always use Lincoln Electric consumables. Visit www.lincolnelectric.com for more details. CUSTOMER ASSISTANCE POLICY The business of The Lincoln Electric Company is manufacturing and selling high quality welding equipment, consumables, and cutting equipment. Our challenge is to meet the needs of our customers and to exceed their expectations. On occasion, purchasers may ask Lincoln Electric for information or advice about their use of our products. Our employees respond to inquiries to the best of their ability based on information provided to them by the customers and the knowledge they may have concerning the application. Our employees, however, are not in a position to verify the information provided or to evaluate the engineering requirements for the particular weldment. Accordingly, Lincoln Electric does not warrant or guarantee or assume any liability with respect to such information or advice. Moreover, the provision of such information or advice does not create, expand, or alter any warranty on our products. Any express or implied warranty that might arise from the information or advice, including any implied warranty of merchantability or any warranty of fitness for any customers’ particular purpose is specifically disclaimed. Lincoln Electric is a responsive manufacturer, but the selection and use of specific products sold by Lincoln Electric is solely within the control of, and remains the sole responsibility of the customer. Many variables beyond the control of Lincoln Electric affect the results obtained in applying these types of fabrication methods and service requirements. Subject to Change – This information is accurate to the best of our knowledge at the time of printing. Please refer to www.lincolnelectric.com for any updated information.