OPERATION
1. The amount of pressure applied by the Tongs is adjustable, and should be checked and/or set
before operation. Correct Tong pressure is necessary to create a proper weld and to prevent damage
to the Electrode Tips.
ADJUSTING TONG AND LEVER PRESSURE
2. If the Tong pressure is too weak, and the work pieces are loose when the Tongs close, severe
arcing will occur between the work pieces when current is applied and no weld will be produced.
To increase the Tong pressure, loosen the front Jam Nut. The more the front Jam Nut is loosened,
the greater the pressure on the Electrode Tips when the Operating Lever is pushed down to
close the Tongs. When the desired pressure is achieved, turn the rear Jam Nut toward the Upper
Tong Holder to lock in position.
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3. If the Tong pressure is too strong, the weld nugget will dimple, and molten material will be forced
out around the weld point. To decrease the Tong pressure, loosen the rear Jam Nut and turn the front
Jam Nut toward the Upper Tong Holder to lock the desired pressure in position.
4. Adjusting the Cap Screw at the rear of the Fixed Handle will determine how rmly the Tongs apply
pressure to the work piece. The farther down the Cap Screw is turned, the farther down the
Operating Lever will close and the more Tong pressure will be applied. Adjust the Cap Screw to
allow the Operating Lever to be raised easily after completion of the welding process. See Figure E.
5. The pressure required to push down the Operating Lever may be adjusted by turning the Hex Nuts
located on each side of the Front Housing clockwise or counter-clockwise to loosen or tighten the
Lever action. See Figure D.
UPPER TONG
HOLDER
OPERATING
LEVER
REAR JAM NUT
FRONT
JAM NUT
HEX NUT
FRONT
HOUSING
WARNING: TO PREVENT SERIOUS INJURY AND ELECTRIC SHOCK: Prior to adjusting the Tong and
Operating Lever pressure, make sure the Spot Welder is disconnected from its electrical supply source.
NOTE: Excessive Tong pressure can damage the Electrode Tips. Do not attempt to hold the work pieces
together by using the Tongs under high pressure as a clamp or vise. To avoid damage, use separate
clamps to hold work pieces together if needed to make good contact at the intended weld point.
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