ROCKER ARM PNEUMATIC SPOT WELDERS - ITEMS 4620N-4628N - 35-50 kVA AT 50% 

Welder photoMAIN WELDER FEATURES
bullet Rocker arm pneumatic spot welder with TE90 microprocessor welding control unit.
bullet Optional TE 180 and TE 185 control units.
bullet Chrome-copper electrode-holders for heavy duty and long life, designed for both straight and angled assembling.
bullet Adjustable electrodes stroke, enabling to reach the max. working rate.
bullet Water-cooled transformer, with epoxy resin coated windings.
bullet Water cooled arms, electrode-holders and electrodes.
bullet Synchronous SCR contactor insulated from cooling water circuit with protection thermostat.
bullet All models have been designed for both single and automatic cycle.
bullet Two stage electric foot control for clamping and welding pieces only if correctly positioned.
bullet The welder has been designed for connecting a second two stage electric foot. This additional electric foot enables the recalling of the twin pre-setting for time and current, useful when it is necessary to carry out two different welds on the same piece.
bullet Double effect pneumatic cylinder, lubrication free against oil mist.
bullet Electrodes force adjustable by means of a protect built-in compressed air filter unit with gauge-pressure, with semi-automatic moisture discharging.
bullet Electrodes speed regulators (both opening and closing), cylinder end-stroke shock absorber, and silencers for compressed air discharge assuring the minimum noise.



ITEMS 4620N-4621N-4622N-4623N
bullet Adjustable arms depth up to 320 mm, enabling to adjust the welder according to the work exigencies. Arms gap 280 mm.
ITEMS 4627N-4628N
bullet Adjustable arms gap from 195 to 500 mm, enabling to adjust the welder according to the work exigencies. Arms depth 500 mm.
 

TECHNICAL DATA

ITEM 4620N 4621N 4622N 4623N 4627N 4628N
Nominal power at 50% kVA 35 35 50 50 35 50
Maximum welding power kVA 75 62 104 82 68 87
Short circuit current kA 17.5 14 21 16.5 15.5 17.5
Maximum welding current on aluminium kA 15.9 12.7 19.1 15 14.1 15.9
Maximum welding current on steel kA 14 11.2 16.8 13.2 12.4 14
Thermal current 100% A 4500 4500 5700 5700 4500 5700
No load secondary voltage V 5.4
4		 5.4
4		 6.1 6.1 5.4
4		 6.1
Supply voltage 50Hz * V 400 400 400 400 400 400
Cables section L=30 m mm2 16 16 35 35 16 35
Delayed fuses A 63 63 100 100 63 100
Insulation class   F F F F F F
               
Min. electrodes throat depth mm 280 480 280 480 500 500
Max. electrode force (6 bar) daN 425 260 425 260 260 260
Electrode stroke mm 5-50 5-75 5-50 5-75 5-75 5-75
               
Max. electrodes throat depth mm 600 800 600 800 - -
Max. electrode force (6 bar)  daN 210 160 210 160 - -
Electrode stroke mm 5-95 5-120 5-95 5-120 - -
               
Minimum arms gap mm 280 280 280 280 195 195
Maximum arms gap mm 280 280 280 280 500 500
               
Arms diameter mm 50 50 50 50 50 50
Electrode-holders diameter mm 25 25 25 25 25 25
Standard electrodes cone diameter mm 14.8 14.8 14.8 14.8 14.8 14.8
               
Compressed air supply bar 6.5 6.5 6.5 6.5 6.5 6.5
Air for 1000 spots (6 bar)               
stroke 20 mm - min. electrodes throat depth Nm3 4.8 4.5 4.8 4.5 4.5 4.5
max. stroke Nm3 6.2 6.2 6.2 6.2 6.2 6.2
Air supply hose  mm 8 8 8 8 8 8
Water cooling  l/min 4 4 4 4 4 4
               
Aerial noise produced dB(A) < 70 < 70 < 70 < 70 < 70 < 70
Measure conditions              
working stroke mm 20 20 20 20 20 20
welding time cycles 14 21 15 24 17 22
welding current kA 13.1 10.5 16 12.4 11.6 13.1
working rating in welds/min   15 15 15 15 15 15
               
Net weight (approximately) kg 200 205 210 215 210 215
* Different voltages and frequencies on request

Specifications subject to change without notice.