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Thomas Disc Couplings and Flexible Disc Packs are engineered for infinite life and optimized for motor, engine and turbine-driven applications. Rexnord's experience and dedication to conservative design standards ensure customers the maximum reliability on the most critical power train systems. Our engineers also work with customers to accommodate unique system operating characteristics.


Catalog: Thomas Flexible Disc Couplings
Catalog: Thomas Flexible Disc Couplings (metric)  

Features & Benefits:

  • Allows for visual inspection and easy replacement of disc packs and center members
  • Zero backlash, low restoring forces, electrically insulated designs
  • More than 25 sizes
  • 18 engagement, disconnect, brake and shear pin options
  • Up to 15.5 inches (394 mm) bore capacity
  • Up to 3,390,000 in-lb (383,019 Nm) torque capacity
  • Up to 20,000 rpm
  • Meets API 671 or API 610 specifications
XTSR71 Series
New product design replaces Series 71 & 71-8. XTSR71 is an adapter spacer coupling designed for ANSI, IEC, API and other pump applications. Can retrofit John Crane Metastream hubs.
BMR Series
Used for heavy duty motor and engine driven service such as paper machines, grinding mills, dredges, and marine propulsion.
XTSR52 Series
New product design replaces Series 52. XTSR52 is an all purpose coupling ideal for pumps & compressors when minimum weight is a performance requirement.
Series 71 4&6 Bolt
Originally design to be used in applications requiring a spacer-type coupling such as ANSI, API and other process pumps. Design has been replaced by the XTSR71.
52 Series
Originally designed as an all purpose high speed, high torque couplings used where minimum coupling weight is desirable. Design replaced by XTSR52.
  • Sizes Available:
  • 125
CMR Series
Used in heavy duty slow to medium speed engine driven applications, where high starting torque, shock loads, torque reversals or continuous alternating torque is present.
AMR Series
Used in heavy duty slow to medium speed applications, where high starting torque, shock loads, torque reversals or continuous alternating torque is present.
54RDG Series
Reduced diameter gear and grid replacement couplings used when overall shaft to shaft spacing is minimal.
SN Series
Economical coupling for floating shaft applications with user-specified intermediate solid shaft, or single-flexing applications with light-to-moderate radial loads.
SN Single Series
Economical coupling for floating shaft applications with user-specified intermediate solid shaft, or single-flexing applications with light-to-moderate radial loads.
BMR Single Series
For single flex applications for light to moderate load.
ST Series
Used to support a substantial radial load while accommodating angular misalignment.
SV Series
For freshwater pumps, sewage pumps, and marine cargo pumps or used in tandem with SF couplings where spans are too long for a single shaft.
SF Series
Semi-floating shaft coupling used in tandem with the SN or SV for long spans.

Contact Thomas Disc Couplings Product Support

North America
1-866-REXNORD (1-866-739-6673)

Outside North America
+31 174 445 111

The Rexnord technical services team is available to lead the specifications process based on your design parameters and an analysis of your application. When a unique situation confronts you, Rexnord is there to provide the right solutions.

With locations around the world, Rexnord provides experienced application and post-sales support, no matter where you are.

Documentation

Thomas Disc Couplings Hub Rebore 537-108 Manual | English | Imperial | 323 KB
Thomas Series 52, Sizes 125-925 Disc Couplings 538-210 Manual | English | Imperial/Metric | 659 KB
Thomas Series 71-8, Sizes 225-750 Disc Couplings 538-220 Manual | English | Imperial/Metric | 296 KB
Thomas Series DBZ, DBZ-A, DBZ-B, Sizes 50-451 Disc Couplings 538-260 Manual | English | Imperial/Metric | 320 KB
Thomas Series DBZ, Sizes 50-451 Disc Couplings 538-270 Manual | English | Imperial/Metric | 159 KB
Thomas Series CMR, AMR, Sizes 225-750 Disc Couplings With T-pack 538-312 Manual | English | Imperial/Metric | 211 KB
Thomas Type SN, EL, Sizes 50-1300 Disc Couplings 538-410 Manual | English | Imperial | 128 KB
Thomas Type ST, BMR Single, SN Single, T-SN Single Disc Coupling 538-510 Manual | English | Imperial | 109 KB