Ruland JC21-8-A Aluminum Jaw Coupling, Bore1/2"

Ruland JC21-8-A Aluminum Jaw Coupling Hub, 1/2" Bore is a clamp-style, zero-backlash coupling hub designed for precision motion control applications. It features a lightweight aluminum construction and is part of a three-piece assembly that includes two hubs and an elastomeric spider insert, providing vibration damping and accommodating misalignment. Bore diameter: 0.5000 in Outer diameter: 1.313 in (33.3 mm) Hub length: 0.590 in Overall assembled length: 1.750 in (44.5 mm) Material: 2024-T351 aluminum Finish: Bright, no plating Coupling style: Clamp Fastening hardware: M3 alloy steel screw, black oxide finish Seating torque: 2.1 Nm Hex wrench size: 2.5 mm Maximum speed: 8,000 RPM Moment of inertia: 0.019103 lb-in² Operating temperature range: -10°F to 180°F (-23°C to 82°C) Recommended hub gap: 0.030 in (0.75 mm) Weight: 0.0753 lbs (approx. 34.2 g) Compliance: RoHS3 and REACH compliant Country of origin: USA Please review pictures carefully and let us know if you have any questions!