ATRA-FLEX Catalog 2025

M-SERIES

ADVANTAGES

\ Unique twist-and-lock ring eliminates special tools or fasteners. \ No lubrication is required. \ Quick insert replacement, reducing maintenance cost and downtime. \ Large torque capacity up to 3,610,000 in-lbs for a wide range of industrial applications. \ Insert is the only wearing component with no metal-to-metal contact. \ Polyurethane inserts are available in a range of hardness to meet most torsional stiffness and torque requirements. \ Dampens torsional vibrations and absorbs shock loads. \ Standard inserts have a temperature range from -60° to 250° Fahrenheit with high temperature inserts available up to 350°F. \ OnyxShield ™ couplings are available for enhanced corrosion and wear resistance.

APPLICATION RANGE

M-Series couplings are suited for a wide range of industrial applications. Torque capacity range up to 3,610,000 in-lbs and shaft capacities up to 16 inches.

HOW IT WORKS

The M-Series operates using a twist-and-lock design that secures the polyurethane insert between two hubs. This insert serves as the flexible element that transmits torque while isolating vibration and accommodating misalignment— angular, parallel, and axial. The coupling’s innovative construction allows for quick insert removal, streamlining maintenance and minimizing downtime. The insert’s flexible resilient material ensures efficient energy transfer while protecting connected equipment from damaging loads and misalignment forces.

MANUFACTURING

M-Series is manufactured in the USA. Each component is precision-machined to ensure superior fit, balance, and performance. Hubs and rings are available in a variety of materials, including carbon steel, stainless steel, and cost-effective OnyxShield ™ components for enhanced wear and corrosion resistance. The polyurethane inserts are molded and tested for durability and long service life that offer resistance to almost every fluid found in industry today. ATRA-FLEX ® ensures strict quality control at every stage of production, delivering a coupling that performs reliably even in the most demanding applications.