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The Difference Between Machine Styles

General Information About Press Spot style spot welders

Press style welders are going to be your most versatile type of resistance welder. It’s the workhorse of the industry. The main thing to understand about Press style welders (and how they differ from Rocker Arm style welders) is that the upper ram comes down in a linear fashion. This is unlike a Rocker Arm style welder, whose welding electrodes effectively rotate into place.

Some instances where a Press style welder really come into play are when:

  • Welding studs or weld nuts
  • High electrode force applications
  • Projection welding
  • Using special tooling to fixture a part
  • Frequent tooling change-overs are necessary
    • Spot welders
    • Projection welders
    • The main difference with the Press welders vs the Projection style welders is the lower knee. A spot welder traditionally has a round lower arm, whereas a projection welder has a box-construction lower knee for mounting tooling and fixturing. It is common to mount t-slot platens to a projection welder to enable quick change-over of tools. Ever seen t-slot platens on a vertical mill? This suits the same purpose.
    • Combo press projection welders
    • Rocker arm welders
  • Seam welders
  • Butt welders
  • Bench top welder
  • Heavy duty welder
  • Dual head welder
  • Manual weld gun
  • Micro welder
  • Economy welder

Differnet Welding Machines