Rocker arms spot welders K – KP

K – KP

K-KP series resistance spot welders, versatile, robust and easy-to-use, ensure best welding results on any weldable metal and are the most ideal solution for all spot welding applications. K-KP models are supplied either mechanical or air operated:

  • K is mechanically operated pedal
  • KP is pneumatically operated by electrical pedal.

Rocker arms spot welders

Z mechanical operated and ZP pneumatic operated series by electric pedal, both of which have adjustable arms length
K mechanical operated and KP pneumatic operated series by electric pedal, both of which enable to adjust lower arms in height and also laterally



  • Excellent welding on all weldable metals
  • Electronic adjustment of the welding current and time
  • Synchronous ignition SCR group with phase shift welding current adjustment to eliminate initial transient
  • Reduced consumption
  • Water cooled arms
  • Water cooled copper electrodeholders with adjustable height
  • Self-lubricated pneumatic components to eliminate oil deposits and to safeguard the environment from contaminants (ZP)
  • High versatility thanks to all different possible work configurations
  • Lower arm with adjustable height which can be rotated for use with a longer electrodeholder (Optional K/KP)




TECHNICAL DATA K 28 / KP 28 K 48 / KP 48
Single phase input50/60 Hz V 220/440 220/440
Nominal maximum power kVA 25 45
Max. welding power kVA 54.7 75
Installed power kVA 14 24
Cross section connecting cables mm2 16 25
Fuse(delayed action) A 36 63
Secondary voltage V 4,2 5,2
Secondary short circuit current kA 14 17,8
Max.welding current kA 11,2 14,2
Electrode force at 600kPa (6bar) da N 300 280
Water consumption at 300kPa(3bar) l/min 3,8 3,8
Dimensions  mm 980 1020
 mm 390 390
 mm 1250 1250
Weight kg 167 194