JiGO JG-CZ-8105N Limit Switch

Where a roller is struck thousands of times a shift by a steel carrier, a casting or a dirty conveyor flight, a plastic roller flattens and eventually seizes. The CZ-8105N uses a metal roller for exactly that duty, with the same forgiving side rotary action that lets the lever travel past the switching point without damage.

Actuator and application

• Side rotary lever with heavy overtravel tolerance in both directions
• Steel roller for abrasive, high-cycle and heavy contact
• Repositionable head so the lever can be set to the approach direction
• Snap-action contacts — one normally open and one normally closed, changing state cleanly regardless of how slowly the actuator moves
• Sealed cable gland entry — the N suffix in this series denotes the gland-entry version, for dusty and wet environments
• Metal head on a moulded body — the actuator head takes the mechanical work, the body carries the contacts

The trade-off is surface marking. On painted, anodised or plastic parts a steel roller leaves a track, so the plastic-roller CZ-8104N is the better choice there. Pick the roller for what it runs against, not for the switch.

Mounting and installation

Mount the switch so the moving part strikes the actuator squarely and runs past it to the overtravel position rather than stopping against it. A limit switch used as a mechanical stop is a limit switch that will be replaced. Tighten the gland properly on the cable — on a sealed switch the gland is the weak point, not the body.