Stud Welding Equipment and Systems KÖCO / Köster & Co. GmbH

Engineering and delivery of KÖCO / Köster & Co. GmbH stud welding machinery: drawn-arc guns, thyristor power sources, mobile inverter units, and automated welding heads.

KÖCO CLASSIC series stud welding guns

KÖCO CLASSIC SK 14, SK 14-ISO, and SK 15 stud welding guns are engineered for drawn-arc and short-cycle welding of studs and insulation pins from 3 to 12 mm. Rugged glass-fibre reinforced housings ensure dependable operation across shipyards and construction sites.

Weldable stud and insulation pin range from 3 to 12 mm with high repeatability
Lightweight shock-resistant polyamide housing weighing only 1.0 kg without cables
Adjustable stroke mechanism providing 1 to 4.5 mm lift for precise arc initiation
Direct integration with 35 mm² welding cables and 4-pin industrial control plugs

KÖCO CONTROL series precision stud guns

KÖCO CONTROL KE 22 and KE 26 stud welding pistols feature integrated electronic stroke sensors and adjustable hydraulic plunge dampers. They deliver micro-accurate stud welding under shielding gas or with ceramic ferrules for stud diameters from 3 to 22 mm.

Microprocessor-guided electronic stroke measurement ensuring arc consistency
Adjustable hydraulic damping preventing weld spatter during stud immersion
Optimized gas shielding shroud for clean pore-free high-strength weld pools
Ergonomic low-fatigue handle assembly engineered for multi-shift production

KÖCO ELOTOP and ELOTOP+ stud welding units

KÖCO ELOTOP 810–3010 and modern ELOTOP+ models (Fox, Tiger, Grizzly) are heavy-duty thyristor power sources delivering welding currents up to 2600 A. Designed for continuous welding of heavy studs and shear connectors up to 25 mm under rugged industrial conditions.

High amperage output up to 2600 A for welding shear connectors up to 25 mm
Microprocessor-controlled constant current regulation during mains fluctuations
Dual gun connection ports and digital communication bus for automation lines
Robust transformer construction in a protective IP 23 industrial housing

KÖCO Inverter portable welding machines

KÖCO Inverter units (305i, 805i-8, 905i, 1805i, and 2305i) combine compact dimensions, low weight (from 17 kg), and ultra-precise pulse control. Ideal for on-site structural erection, sheet metal fastening, and mobile industrial maintenance tasks.

Portable power unit weight starting from 17 kg for effortless site transport
Digital pulse duration adjustment in 1 ms increments via illuminated LC display
Reliable operation from mobile generators and standard single-phase 230 V mains
Built-in USB memory port for comprehensive weld quality parameter logging

KÖCO stud welding gun replacement components

Replacement assemblies for KÖCO CLASSIC SK 14-ISO, SK 15, and CONTROL KE 22 guns: bodies 322-0601-000, handles 322-0596-000/322-0597-000, magnets 329-0022-000, switches 329-0031-000, and connectors 325-0240-000. Engineered for prompt servicing with factory tolerances.

Gun body housing 322-0601-000 with precise alignment seats for guide rods
Upper and lower handle set with textured anti-slip grip for secure holding
High-durability electromagnetic lifting solenoid 329-0022-000 rated for heavy duty
Dust-proof trigger push button 329-0031-000 and 4-pin industrial control plug

KÖCO welding studs, chucks, and ceramic ferrules

KÖCO consumables matching DIN EN ISO 13918 standards: RD and MD K 800 threaded studs, SD1/SD3 shear connectors for composite beams, RF/UF ceramic ferrules, and quick-change chucks from 3 to 25 mm. Engineered to yield sound, porosity-free structural weld collars.

Cold-formed K 800 studs with low carbon content preventing weld embrittlement
Heavy SD1 shear connectors engineered for through-deck welding onto steel beams
High-conductivity beryllium copper collets providing maximum electrical contact
Precision ceramic ferrules RF, UF, and PF shielding molten pools from oxidation

Drawn-arc stud welding technology and KÖCO CLASSIC gun mechanics

KÖCO / Köster & Co. GmbH CLASSIC series stud welding guns (SK 14, SK 14-ISO, and SK 15) operate via drawn-arc ignition with ceramic ferrules or shielding gas. Trigger actuation energizes lifting solenoid 329-0022-000, raising the stud chuck from 1 to 4.5 mm.

A pilot arc establishes the ionized conduction channel before main welding current discharges. When the stud base and workpiece pool melt, internal springs return the chuck, immersing the fastener into molten steel.

Shock-resistant polyamide body 322-0601-000 shields internal coils from thermal radiation and physical impacts on structural erection sites.

Electronic stroke monitoring and hydraulic plunge damping in CONTROL KE

KÖCO / Köster & Co. GmbH CONTROL series guns (KE 22 and KE 26) incorporate integrated linear stroke sensors. Internal microprocessors track real-time stud lift heights and downward immersion velocities.

Adjustable hydraulic damping eliminates shock upon stud immersion into molten weld metal, suppressing spatter and gas voids. This capability proves essential when welding alloy fasteners under pure argon or gas mixtures where arc column stability dictates joint integrity.

The ergonomic gun body is tailored for demanding multi-shift fabrication cycles across machinery and bridge engineering plants.

Heavy-duty thyristor rectification in ELOTOP and ELOTOP+ power units

KÖCO / Köster & Co. GmbH ELOTOP units (810, 1010, 2010, 3010) and ELOTOP+ systems (Fox, Tiger, Grizzly) feature heavy-duty three-phase thyristor bridge rectifiers. Microprocessor current control compensates for utility grid fluctuations up to fifteen percent, maintaining steady arc current.

The units support continuous welding of fasteners up to 25 mm diameter at currents reaching 2600 A. Integrated diagnostic monitors track thyristor junction temperatures, insulation resistance, and control circuit continuity, preventing field breakdowns during high-volume structural fastening.

Portable inverter power sources for versatile construction site fastening

KÖCO / Köster & Co. GmbH Inverter welders (305i, 805i-8, 905i, 1805i, 2305i) leverage advanced semiconductor switching topology. Weighing from 17 kg, these compact power modules generate precise welding pulses with 1 ms duration increments.

They are optimized for fastening insulation nails, threaded bosses, and break-off pins to light sheet metal without reverse-side discoloration.

Power electronics feature forced-air tunnel cooling, while sensitive control circuit boards are sealed with protective conformal coatings against conductive construction site dust.

Metallurgical performance of ISO 13918 studs and heavy shear connectors

Cold-formed RD and MD K 800 studs from KÖCO / Köster & Co. GmbH feature low carbon steel chemistries strictly capped at 0.10 percent carbon equivalent. This prevents heat-affected zone hardening and eliminates cold cracking risks in dynamic structural joints.

Heavy SD1 and SD3 headed shear connectors transfer longitudinal shear stresses within steel-concrete composite bridge girders and multi-story floor decks. Approved through-deck welding capabilities allow direct fusion through galvanized steel decking without pre-drilling pilot openings.

Preventative maintenance guidelines and collet wear management

Sustaining consistent weld joint quality requires routine inspection of KÖCO / Köster & Co. GmbH stud welding tools. Operators inspect clamping torque on handle screws 322-0596-000 and 322-0597-000, verify plug 325-0240-000 pins, and clean chuck internal gripping slots every shift.

High-conductivity beryllium copper collets must be replaced upon noticing arc erosion or relaxed spring finger tension to avoid voltage drops. Guide pillars and support legs require regular removal of weld spatter and lubrication with high-temperature silicone grease.

KÖCO / Köster & Co. GmbH and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of KÖCO / Köster & Co. GmbH and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.