Wire Drive Mechanism, Wire Straighteners

D-5

MAINTENANCE

D-5

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3.Pull the gear from the shaft using the screws as a pulling device.

4.Be certain woodruff key (8) is properly located on the shaft. Screw the adapter plate and motor assembly mounting screws into the new fiber input helical gear from the stenciled side and place the gear on the shaft. Replace plain washer (9), tighten the hex nut (1), and remove the adapter plate and motor assembly mounting screws from the gear.

5.After noting the relation of the adapter plate with the motor leads, remove the adapter plate from the wire drive motor. See Figure D.6. Support the pinion properly and, with the proper size punch, drive the roll pin that holds the pinion out of the shaft. Pull the pinion off. Install the new pinion and replace the roll pin. Replace the adapter plate in its original location.

6.Cover the teeth of the motor pinion and the input gear with a non-fluid molydisulfide type grease such as Non-Fluid Oil Corporation’s A-29 Special/MS Lubricant. This grease can be scooped from the cavity of the gear case.

7.Reassemble the motor on the gear box; make sure the gears mesh properly and the adapter plate locating bead is in its cavity. Replace and tighten the four screws removed in step 1.

8.Jumper on wire speed meter PC board must be properly positioned for the gear ratio and drive rolls being used (See the wiring diagram for the wire speed meter PC board.)

WIRE DRIVE MECHANISM

Drive mechanisms for three wire size ranges are available: 0.035 through 0.052 in. (0.9 through 1.3 mm), 1/16 through 3/32 in.

1.6through 2.4 mm), and 3/32 through 7/32 in. (2.4 through 5.6 mm). If changing to wire sizes outside this range, change the drive rolls and the incoming and outgoing guide tubes. Also change the gear ratio as necessary.

NA-5

FIGURE D.6 – DRIVE MOTOR PINION GEAR REMOVAL.

WIRE

DRIVE

MOTOR

SHAFT

ADAPTOR

PLATE

PINION

ROLL PIN MOUNTING

SCREW (X3)

The electrode is driven by gripping between the grooved drive rolls and spring-loaded idle roll. Replace the drive rolls when they become worn. The drive rolls for 1/16 in. (1.6 mm) and larger diameter electrodes have two sets of teeth so they can be reversed once before they must be replaced.

WIRE STRAIGHTENERS

Solid Electrode

Periodically inspect the slide bushing at the top of the straightener and the ingoing wire guide at the bottom of the straightener for signs of wire milling. If necessary, rotate the guide to present an unworn surface. To reverse the slide bushing for a fresh wear surface, remove the cross adjustment screw and turn the bushing over.

Flux-Cored Electrode

Severe wear at the “V” groove in the curved arm of the straightener can result in wire wander at the arc. Periodically check the groove and replace the arm when badly worn. Also replace the ingoing guide at the top of the straightener if it shows signs of wire milling.

NA-5S, NA-5N, NA-5SF, NA-5NF specifications

The Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S are advanced welding helmets that are pivotal in enhancing the safety and efficiency of welders in various applications. These models are designed to provide exceptional protection and visibility, making them indispensable tools in the welding industry.

One of the main features of the NA-5 series is the auto-darkening filter technology. This feature allows the helmet to automatically adjust its shade based on the intensity of the arc. As the welder strikes an arc, the lens darkens instantaneously, shielding the eyes from harmful rays generated during the welding process. This functionality not only ensures safety but also enhances productivity, as welders do not need to manually flip the helmet up and down.

The helmets are equipped with a wide viewing area that allows for better visibility and precision while working. With a large lens, welders can easily monitor their work and surrounding environment, minimizing the risk of accidents. Additionally, the lightweight design of the NA-5NF, NA-5SF, NA-5N, and NA-5S provides comfort during extended periods of use, reducing neck strain and fatigue.

The NA-5 series is also well-regarded for its durability. Constructed from impact-resistant materials, these helmets can withstand the rigors of demanding work environments. This durability extends the lifespan of the helmet, making it a cost-effective investment for both professional and hobbyist welders.

Another notable characteristic is the adjustable sensitivity and delay settings found in certain models. These settings allow the user to customize the helmet based on their specific welding conditions. For instance, a welder can increase sensitivity for low-amperage tasks or adjust the delay to allow for a smoother transition from dark to light after completing a weld.

Furthermore, the helmets come with a reliable battery life, ensuring that they can be used for long periods without interruption. Some models also feature solar assist functionality, which helps recharge the auto-darkening filter, enhancing their overall efficiency.

In summary, the Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S welding helmets represent a significant advancement in personal protective equipment for welders. Their combination of auto-darkening technology, wide viewing area, lightweight design, durability, and customizable settings makes them an excellent choice for anyone engaged in welding tasks. With these helmets, users can achieve greater safety and efficiency in their work, enabling them to focus on their craft with peace of mind.

Lincoln Electric NA-5S, NA-5NF Wire Drive Mechanism, Wire Straighteners, Solid Electrode

Models: NA-5S NA-5N NA-5SF NA-5NF