Adjustable Wire Reel Brake

B-10	OPERATION	B-10

WIRE REEL LOADING – 50 AND 60 LB COILS (K303 OR K376 WIRE REEL STAND)

The mount for standard 50 and 60 pound electrode coils includes a two-position brake assembly. Generally the brake should be at the inner position (nearest to the wire reel shaft) for wire feed speeds below 400 in./min (10 m/min). It should be at the outer position for the faster wire speeds often used when feeding smaller diameter electrode.

To adjust the brake position, remove the wire reel. Pull the cotter pin that holds the brake shoe to the arm, move the shoe and replace the cotter pin. Do not bend the cotter pin - it is held in place by a friction fit.

TO MOUNT A 50 OR 60 LB COIL:

1. To remove the wire reel from its shaft, grasp the

spring loaded knob and pull out. This straightens

CAUTION

Always be sure the free end of the coil is securely held while the tie wires are being cut and until the wire is feeding through the drive rolls. Failure to do this will result in “back lashing” of the coil, which may tangle the wire. A tangled coil will not feed. It must be untangled or discarded.

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8.Cut and remove only the tie wire holding the free end of the coil. Insert the free end into one of the holes in the cover and secure it by bending it back. Cut and remove the remaining tie wires.

9.Replace the reel on the wire feeder. Grasp the shaft knob, pull it out and swing it across the reel hub, locking the reel in place.

FIGURE B.6 – LOADING A 50 OR 60 LB COIL.

	the knob so it seats into the shaft when released.
	Remove the reel.
2.	Lay the reel flat on the floor. Loosen the spinner
	nut and remove the cover plate. See Figure B.6.
3.	Place the coil of electrode on the reel so it
	unwinds as the reel rotates clockwise. DO NOT
	cut the tie wires at this time.
4.	Be sure the coil is placed so the spring loaded
	arms will not interfere with the later removal of the
	coil tie wires.
5.	When loading 0.030 to 0.045” electrode, be
	certain the coil is placed on the reel so the spring
	loaded arms are at the center of the slots in the
	cardboard coil liner. This provides the positive
	compression of the coil sides needed for trouble-
	free wire feeding.
6.	Put the cover plate on the reel so the four arms of
	the cover plate straddle and are in line with the
	spring loaded arms of the reel.
7. Tighten the cover as much as possible by hand.
	DO NOT hammer on the spinner nut arms.

SPINNER

NUT

COVER

PLATE

COIL

REEL

SLOTS

CARDBOARD COIL LINER

TIE WIRE

SPRING

LOADED

ARM

LN-742 & LN-742H

LN-742, LN-742H specifications

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Durability is a significant consideration in the design of the LN-742H and LN-742, as they are built with high-quality materials that withstand heavy use and challenging conditions. The rugged construction extends the lifespan of the machines, reducing the need for frequent repairs and servicing.

In summary, the Lincoln LN-742H and LN-742 welding machines exemplify advanced engineering and user-focused design. Their combination of powerful performance, portability, user-friendly features, and versatile applications makes them essential tools for professionals in the welding industry, paving the way for excellence in metal fabrication and repair.

Lincoln LN-742H manual Adjustable Wire Reel Brake, To Mount a 50 or 60 LB Coil

Models: LN-742 LN-742H

OPERATION