Tecna Pneumatic spot welders 16-25 kVA

TECNA spot welders are designed to meet every need of spot welding.
The new stationary ergonomic frame designed by TECNA helps to facilitate the operator's work.
The control unit has been positioned frontally to allow the operator to view the welding data even during the working cycle.
The pneumatic commands and the compressed air pressure gauge have been placed at the top for easier adjustment and reading.

MAIN WELDER FEATURES

  • Arms adjustable in length allowing a better working flexibility.
  • Chrome-copper electrode-holders for long life and heavy duty service, designed for straight and angled fitting.
  • Adjustable electrode stroke.
  • Epoxy resin coated transformer.
  • Water-cooled transformer, arms and electrodes.
  • Microprocessor control unit TECNA TE101.
  • The air operated lubrication free cylinder eliminates oil mist.
  • Electrode force adjustment with air filter reducer with gauge.
  • Semi-automatic drainage system.
  • Electrode speed control valves, shock absorber for cylinder's end of stroke and air discharge silencers.
  • Two-stage electric foot pedal, that besides its normal use in automatic and single spot mode, allows the operator to bring the pieces together and to weld them only when correctly positioned.
  • Pre-arrangement for the connection of a second electric two-stage foot pedal item 70284.
  • The addition of the second foot pedal allows to recall two different adjustments of time- current. This function is helpful when different kinds of welding are to be performed on the same piece.

TECHNICAL DATA

ITEM 4645N 4646N 4647N 4648N 4649N
Nominal power at 50% kVA 16 20 20 25 25
Maximum welding power kVA 35 48 39 68 55
No load secondary voltage V 3.4 4 4 4.6 4.6
maximum short circuit current kA 12.5 14.5 12 18 14.5
Maximum welding current on alumlght alloys kA - - - 16.3 -
Maximum welding current on steel kA 10 11.6 9.6 14.4 11.6
Thermal current 100% A 3300 3500 3500 3800 3800
Supply voltage 50Hz * V 400 400 400 400 400
Cables section L=10 m mm2 6 10 10 16 16
Cables section L=30 m mm2 10 10 10 16 16
Delayed fuses A 32 40 40 50 50
Min. electrodes throat depth mm 230 230 380 230 380
Max. electrode force (6 bar) daN 240 240 165 240 165
Electrode stroke mm 8-44 8-44 10-60 8-44 10-60
Max. electrodes throat depth mm 550 550 700 550 700
Max. electrode force (6 bar) daN 115 115 90 115 90
Electrode stroke mm 15-85 15-85 15-105 15-85 15-105
Short circuit current with L max. kA 8.4 10 8.8 13 10.5
Arms diameter mm 36 40 40 40 40
Electrode-holders diameter mm 19 22 22 22 22
Standard electrodes cone diameter mm 12.7 14.8 14.8 14.8 14.8
Compressed air supply bar 6.5 6.5 6.5 6.5 6.5
Air for 1000 spots (6 bar) Nm3 4.3 4.3 4.3 4.3 4.3
Water cooling l/min 2.5 3 3 3.7 3.7
Aerial noise produced dB(A) < 70 < 70 < 70 < 70 < 70
Measure conditions            
working stroke mm 20 20 20 20 20
welding time cycles 21 17 26 14 20
welding current kA 9.4 11 9 13.5 11
working rating in welds/min   10 10 10 10 10
Net weight (approximately) kg 133 141 144 143 146

* Different voltages and frequencies on request

 

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Specifications subject to change without notice.

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