Martin NUMBER 5 Quadra‑Flex Sleeve Elastomeric Coupling Insert

This Martin NO.5 Quadra‑Flex coupling sleeve is a thermoplastic elastomer insert used in Martin Quadra‑Flex flexible couplings. Designed for smooth torque transmission, it absorbs vibration, accommodates shaft misalignment, and reduces shock loads in rotating equipment. Installed between two toothed coupling flanges, the sleeve provides maintenance‑free operation with no lubrication required. Technical Specifications Model: No. 5 Quadra‑Flex Sleeve Type: Elastomeric coupling insert Sleeve Style: Solid one‑piece sleeve (JEM/EM‑type family) Material: Thermoplastic elastomer (Martin TPR family) Outside Diameter: ~2.94 in (typical for Size‑5 sleeves) Overall Length: ~1.56 in (typical size‑5 spec) Torque Rating: Approx. 240 in‑lb (standard for Size‑5 sleeves) Max RPM: 7600 rpm (size‑5 typical) Operating Temperature: −50 °F to +275 °F (material typical) Applications: Pumps, blowers, conveyors, mixers, gearboxes, compressors, general industrial rotating machinery Manufacturer: Martin Sprocket & Gear Country of Manufacture: USA Please review pictures carefully and let us know if you have any questions!