ME8104 / TZ8104 Rotary Plastic Roller Arm Limit Switch — Momentary (1Pcs) Key benefits Detects travel limits and mechanical positions reliably: the rotary roller arm provides positive, repeatable actuation when a moving part reaches a preset point. Reduces machine downtime and wear: the plastic roller arm glides against moving surfaces to minimize friction and impact. Simple replacement or upgrade: a direct, compact limit switch solution for machines and equipment that need dependable momentary position sensing. Clear identification: includes both model numbers (ME8104, TZ8104) so you can confirm compatibility with existing installations or documentation. What it is and why you need it This is a momentary limit switch with a rotary plastic roller arm, supplied as 1 piece. It closes or opens its contact only while the roller actuator is engaged, making it ideal for endoftravel detection and shortduration position sensing tasks. Use it to protect equipment from overtravel, to trigger control sequences, or to provide feedback to PLCs and control systems where a compact, mechanical actuator is required. Key attributes Model: ME8104 / TZ8104 Actuation type: Rotary roller arm Actuator material: Plastic roller (low friction, gentle contact) Switch action: Momentary (returns when actuator released) Quantity: 1Pcs Form factor: Compact, suitable for confined mounting locations Operation: Mechanical, directcontact actuation for clear on/off switching Practical applications Conveyor and material handling: Detect package or carriage position and stop or divert conveyors to prevent jams and overtravel. Machine tools and automation: Provide endoftravel feedback for moving slides, fixtures, or actuators to improve safety and repeatability. Doors, gates, and robotics: Sense door open/closed positions or robot arm limits where a reliable, tactile switch is required. Installation and usage tips Mount the switch so the roller arm engages the moving part at the desired trip point; adjust the actuator angle when possible to achieve reliable operation. Confirm wiring and any required electrical ratings from your system documentation before connecting (this listing describes the mechanical model and actuation type). Periodically inspect the roller arm and mounting for wear or misalignment in cycle applications. Why choose this switch Practical, nofrills solution for mechanical position sensing where a momentary rotary actuation is required. The plastic roller minimizes impact on moving parts while providing dependable switching action. Supplied as a single unit (1Pcs) under familiar model numbers (ME8104 / TZ8104) for easy identification and replacement.