The **FRT-C4-R/Q** refers to a high-performance, compact **Rotary Damper** manufactured by companies like Fuji Latex. These components are essential in motion control to provide smooth, mechanical resistance to rotating parts. --- ### 1. Technical Specifications The "R" and "Q" suffixes often denote specific torque characteristics or rotation directions (Clockwise or Counter-Clockwise). | Feature | Specification (Typical) | | :--- | :--- | | **Torque Range** | 0.2 N·m to 0.4 N·m (approximate) | | **Rotation Angle** | 360° Continuous | | **Operating Temp** | 0°C to 50°C | | **Material** | Polycarbonate (Body), Polyacetal (Gear/Rotor) | | **Fluid Type** | High-viscosity Silicone Oil | ### 2. Internal Mechanism While these are mechanical parts, they are frequently used alongside electronic sensors or actuators. * **Viscous Resistance:** The internal rotor spins against a thick silicone oil. The shear force of the fluid provides the damping effect. * **One-Way vs. Two-Way:** * **FRT-C4-R:** Usually indicates resistance in the Right (Clockwise) direction. * **FRT-C4-Q:** Often indicates a specific gear pitch or alternative resistance profile (depending on the specific series catalog). * **Gear Interface:** Typically features a plastic pinion gear that interfaces with a rack or another gear. ### 3. Applications in Electronics The FRT-C4 series is integrated into electronic hardware to enhance user experience and protect internal components: * **Consumer Electronics:** Slow-opening CD/DVD trays, soft-close lids on smart home devices. * **Automotive Interiors:** Damping for glove boxes, cup holders, and ash trays. * **Office Equipment:** Controlled closing for printer covers and scanner lids to prevent mechanical shock to sensors and glass. --- ### 4. Installation Considerations When integrating the FRT-C4 into a design, engineers must consider: 1. **Torque Stability:** The damping force changes slightly based on the ambient temperature (viscosity of the oil decreases as temperature rises). 2. **Radial Load:** Excessive side-pressure on the gear can cause premature wear or failure of the internal seal. 3. **Directionality:** Ensure the chosen model (R or Q) matches the required damping direction of your mechanism.