THOMSON
Heavy Duty Rocker Arm
Spot Welders

The Thomson Model RA-2 is an air-operated rocker arm spot welder. It is a versatile machine designed to meet or exceed RWMA standards and to fit the special needs of shops performing high production sheet metal work.

RA-2's are used for welding light to medium gauge parts or production welding such products as stampings, wire products, cabinets, electronic parts, and other similar products.

  • Frame - A sturdy fabricated steel frame provides complete protection for the transformer and is substantially reinforced to minimize deflection.
  • Electrode Holders - Water cooled, ejector type, #1 Morse taper, 11/4" diameter holder x 8" long or #2 Morse taper, 11/4" diameter holders available.
  • Transformer - 30, 50, 75, 100 KVA heavy-duty transformers have a stacked core and are water cooled. Each transformer has a 50% duty cycle rating in accordance with RWMA standards. Standard voltages are 230 and 460. Other voltages available upon request. A multi-position tap switch is standard on all Thomson Heavy-Duty Rocker Arm Welders.
  • Air System - The air system consists of a pressure regulator, lubricator, dual speed control valves, pressure gauge, and solenoid valve.
  • Control Systems - Offer a wide selection of powerful and economical programmable microprocessor controls. They   can be specified with such features as automatic power factor adjustment and multi-scheduling. This control flexibility permits difficult welding applications to be performed reliably at minimum cost.
  • Water Cooling - A series water circuit is standard. Water cooling is supplied to the electrodes, transformer, and welding controller.
  • Knee Brace - Standard on 18" or longer throat depths.
  • Initiation - By double stage foot switch.

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OPTIONAL ACCESSORIES

  • Special electrodes or electrode holders
  • Single stage foot switch
  • Adjustable pressure switch
  • Adjustable stroke cylinder
  • Retractable air cylinder
  • Adjustable retractable air cylinder
  • Universal arm - 90 degrees one end, 60 degrees other end
  • Pneumatic electrode dresser (with blade/ chuck combo)
  • Quick disconnect water fittings (set of 4) for holders/tooling
  • Water flow switch
  • Special holderslarms/tooling
  • Special voltages/multiphase
  • Air reserve tank
  • Visual water flow indicator
  • Adjustable pressure tip dress
  • Water filter package
  • Control circuit breaker/disconnect
  • Various control options
  • Remote weld/no weld switch
  • Water chillers