Martin 12H Quadraflex Sleeve Hytrel 9.563″ OD 4.688″ Length

Description

Product Overview

The Martin 12H Quadraflex Sleeve is engineered as a high‑performance flexible coupling component for industrial power transmission systems. Constructed from Hytrel, a thermoplastic polyester elastomer, the sleeve delivers exceptional resistance to torque overload, temperature extremes, and chemical exposure. With an outer diameter of 9.563 inches and a length of 4.688 inches, it fits precisely into the Quadra‑Flex series assemblies that use Martin S and SC type flanges. The design incorporates strategically placed teeth that spread torsional forces across the entire sleeve and flange interface, minimizing localized stress and wear. Two configurations are available: a one‑piece Type H sleeve for straightforward installations, and a two‑piece Type HS version that uses a metal retaining ring for applications where space constraints prevent the use of a single piece. Package dimensions are 11.9 x 11.1 x 5.3 inches, weighing 7.55 pounds, and the product has been available since November 10, 2010.

Usage

This sleeve is ideal for high‑torque, high‑temperature environments such as heavy‑duty conveyors, mixers, crushers, and gearboxes in the mining, construction, and manufacturing sectors. It performs reliably in systems that experience frequent start‑stop cycles, shock loads, and misalignment. The flexible nature of the Hytrel material allows the coupling to absorb vibration and compensate for angular, axial, and radial misalignment, extending the lifespan of adjacent equipment. Installers appreciate the two‑piece option for tight spaces where a single sleeve would be impractical. The product is also suitable for custom machinery where precise torque transmission and durability are critical.

Why Choose Us

Choosing the Martin 12H Quadraflex Sleeve means selecting a component backed by decades of engineering expertise and rigorous quality control. Each sleeve undergoes comprehensive testing for torque capacity, temperature resistance, and material integrity, ensuring consistent performance across a wide range of operating conditions. The Hytrel material provides a unique combination of flexibility and strength, outperforming traditional rubber or polymer couplings in demanding applications. Our dedicated technical support team assists with installation guidance, troubleshooting, and after‑sales service, guaranteeing that you receive the most out of your investment. With a proven track record reflected in a Best Sellers Rank of #75 in Flexible Gear & Sleeve Couplings, the sleeve is trusted by professionals worldwide.

Key Features

• Hytrel elastomer provides high torque capacity and temperature resistance for demanding industrial use.
• Integrated teeth evenly distribute torsional load, reducing wear on both sleeve and flanges.
• Two design options (one‑piece and two‑piece) allow flexibility in tight installation spaces.
• Compatible with Martin S and SC flanges, simplifying integration into existing Quadra‑Flex assemblies.
• Comprehensive after‑sales support and technical assistance ensure reliable long‑term operation.

FAQ

What is the maximum torque rating for the Martin 12H Quadraflex Sleeve?

The sleeve is rated for high‑torque applications typical of industrial gearboxes; exact torque capacity depends on the specific system configuration and should be verified with the manufacturer’s torque charts.

Can the sleeve be used in environments with temperatures above 200°F?

Yes, Hytrel maintains its mechanical properties at elevated temperatures, making the sleeve suitable for operations up to approximately 250°F, subject to system design limits.

What is the difference between the Type H and Type HS versions?

Type H is a single‑piece sleeve offering quick installation, while Type HS consists of two halves secured with a metal retaining ring, providing a solution for installations where clearance is limited.

How do I ensure proper alignment when installing the sleeve?

Follow the manufacturer’s alignment guidelines: verify that the flanges are parallel, use precision measuring tools to check axial and radial gaps, and torque the retaining ring (if applicable) to the specified value.

Is there a warranty or service program for this product?

Martin offers a standard limited warranty covering material defects, and our customer service team can provide information on extended service agreements if needed.