KLAUKE 31R Copper Crimp Connector 185 mm², Indent Crimping, Electrolytic Copper

Electricians and panel builders working on heavy-duty power distribution often need a reliable way to join large copper conductors without soldering. The KLAUKE 31R copper crimp connector answers that need: a solid, barrel-shaped sleeve made from electrolytic copper, sized for 185 mm² conductors and installed with a standard indent crimping tool. It creates a permanent, low-resistance connection that withstands vibration and thermal cycling, making it a staple in industrial switchgear, transformer connections, and building mains.

Key specifications

• Connector type: Crimp connector (sleeve) for uninsulated copper conductors
• Conductor cross-section: 185 mm²
• Material: Electrolytic copper (E-Cu), bare, no surface coating
• Crimping method: Indent crimping (Kerbpressung) with suitable dies
• Compatible conductor classes: Fine-stranded, stranded, and solid (Class 2, 5, 6)
• Dimensions: Length 70 mm, outer diameter 22 mm, inner diameter 18.5 mm
• Operating temperature range: -5 °C to +70 °C
• Voltage rating: Up to 1000 V
• RoHS compliant: Yes
• Packaging unit: 1 piece

Why choose it

The 31R is machined from high-purity electrolytic copper, which offers excellent conductivity and ductility. Its thick wall and precise bore ensure a tight fit on the conductor before crimping, reducing the risk of voids or hot spots. Because it is bare copper, it can be used in dry, indoor environments or protected enclosures without additional corrosion concerns. The indent crimping method is widely accepted and produces a gas-tight joint when performed with calibrated tools, ensuring long-term stability.

Ideal use cases

• Connecting large cross-section conductors in low-voltage power distribution panels
• Terminating transformer secondary leads or motor supply cables
• Creating permanent joints in busbar systems and industrial machinery
• Repairing or extending heavy gauge copper wiring in commercial buildings

Good to know

Always use a crimping tool with dies specified for 185 mm² copper connectors and follow the manufacturer's instructions for indent depth and number of crimps. The connector is supplied individually; order the required quantity for your project. For outdoor or corrosive environments, consider applying additional protection such as heat-shrink tubing or insulation tape after crimping.