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Built for Performance, Engineered for Simplicity
When uptime matters and reliability is non-negotiable, U.S. Tsubaki’s ATRA-FLEX® Flexible Couplings deliver. Proudly 100% made in the U.S.A., the M-Series (Millenium®) and T-Series (T-FLEX®) couplings are designed to meet the rigorous demands of today’s industrial environments, without the hassle of frequent maintenance. These couplings require no lubrication, offer minimal maintenance, and are built to absorb shock, dampen vibration, and accommodate misalignment with ease.
Whether you're operating in pulp and paper, mining, power generation, or food processing, ATRA-FLEX® couplings provide a rugged, long-lasting solution that reduces downtime and lowers total cost of ownership. With a simple twist-lock design and a single replaceable polyurethane insert, installation and replacement are fast and tool-free, keeping your operations moving and your maintenance team focused on what matters most.
M-Series (Millenium®)
How M-Series Works
The M-Series close coupled couplings feature two flex hubs, a polyurethane insert, and a locking ring. Installation is quick—no fasteners or special tools needed. The insert shears in case of a lockup, protecting equipment from damage. Only the insert requires replacement, which can be done in minutes without moving shafts or hubs.
M-Series Features
• Tool-Free Installation: Twist-and-lock ring design requires no fasteners or special tools
• High Performance: Handles extreme shock, vibration, and misalignment with no lubrication needed
• Versatile & Durable: Operates from -60° to 350°F with insert options for chemical and thermal resistance
• Powerful & Scalable: Supports up to 20" shafts and 3.6 million in-lbs of torque across multiple configurations
• Corrosion-Resistant Option: Nitrocarburized finish offers a cost-effective alternative to stainless steel
T-Series (T-FLEX®)
How T-Series Works
The T-Series close coupled coupling includes a ring hub, flex hub, insert, and drive ring. Once the hubs are mounted, the insert fits over the flex hub, and the drive ring engages the insert and is secured to the ring hub with high-strength fasteners. This design delivers smooth, silent, and maintenance-free torque transmission.
T-Series Features
• Shock-Absorbing & Misalignment-Friendly: Handles extreme torsional shock and all misalignment types without reactionary loads
• Built-In Safety: Combines compression stability with shear protection; insert shears on lockup to prevent equipment damage
• High Capacity: Supports up to 15" shafts and 1,570,000 in-lbs of torque across multiple configurations
• Low Maintenance: No lubrication needed; single rugged insert is easy to inspect and replace without moving equipment
• Versatile & Durable: Operates from -60° to 350°F, with insert options for high torque, chemical resistance, and corrosion protection via nitrocarburizing
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