Thomas® Coupling Catalog
44Pages

TABLE OF CONTENTS DESCRIPTION Couplings PAGE The Thomas Advantage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Application Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4, 5 Misalignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Selection Procedures . . . . . . . . . . . ....

Couplings THE REX® THOMAS® ADVANTAGE M.T. Thomas revolutionized the coupling industry by inventing the flexible disc coupling in 1919. Today Thomas’ engineers continue to improve the disc coupling through design innovation, modern materials and lean manufacturing processes. The Rex® Thomas® disc coupling is manufactured within a certified ISO 9001 quality system and is unsurpassed in its reputation for quality, reliability and easy maintenance features. The flexible disc packs are engineered for infinite life when applied within the published ratings and environmental guidelines. Our...

Couplings REX® THOMAS® COUPLING APPLICATION GUIDE Typical Applications Close-coupled applications. Suitable as replacement for gear and grid couplings Torque Range* (lb.-in.) RPM* Range Up Coupling Type Up to to 1,724,800 to 43,400 to 3,390,000 1/3 4.75 16 1/2° 14 17 1/3° 10.8 18, 19 1/2° – 1/3° 4.75 20 1/2° 15.5 21 1/3° 15.5 22, 23 1/3° 6 24 1/3° N/A 25 15,000 Up 15 Up to 9.00 9,000 Up Max. Ang. Misalignment Per Disc Pack Up to Page Number 10,500 Up Max.* Bore (in.) Up ° Series 54RDG Mixers, Compressors, Agitators, Blowers and Fans, Centrifugal Pumps, Conveyors DBZ-B Pumps & Compressors...

Couplings REX® THOMAS® COUPLING APPLICATION GUIDE Vertical Drives such as Sewage Pumps, Printing Machines, Marine Pumps. Available as a standard in corrosionresistant materials Up to to 1,466,000 3,600 Up Up to to 1,466,000 3,600 Up Up to to 200,000 2,500 Up Up to to 1,040,000 2,500 Up Up to to 838,800 7,100 Up to to 28,500 Up to to 1,150,000 SF Turbines, Pumps, Compressors, Test Stands, Generators, Speed Increasers, Fans (Cooling Tower, Mine Ventilating, Forced and Induced Draft), Paper Mill Drives, Line Shafts, Printing Machines, Pumps. Available as a standard in corrosion-resistant...

Couplings REX® THOMAS® FLEXIBLE COUPLINGS A flexible coupling is a device used to connect the ends of two shafts, transmit torque, and at the same time, accommodate slight misalignments which develop in service. The primary functions of all flexible couplings are: 1. To transmit power from one shaft to another, efficiently and effectively. 2. To accommodate slight shaft misalignments which develop in service. The secondary functions of flexible couplings are: Shafts become misaligned during operation because of settling foundations, the effects of heat, vibration, etc. These misalignments...

Couplings REX® THOMAS® COUPLING SELECTION SELECTION PROCEDURES SERVICE FACTORS DISC COUPLING SELECTION PROCEDURE Service Factors are a means of classifying different equipment and applications into various load classifications. Due to variations in application of equipment, service factors are used to adjust equipment ratings to accommodate for variable loading conditions. The following procedure can be used to select Disc couplings for most applications. For applications involving other than normal loading or design, special consideration must be given to coupling selection. Rexnord...

Couplings REX® THOMAS® COUPLING SELECTION TYPICAL SERVICE FACTORS – MOTOR AND TURBINE DRIVEN EQUIPMENT* Application Typical Service Factor AGITATORS Pure Liquids . . . . . . . . . . . . . . . . . .1.0 Variable Density . . . . . . . . . . . . . . . .1.5 ALTERNATOR . . . . . . . . . . . . . . . . . .1.5 BLOWERS Centrifugal . . . . . . . . . . . . . . . . . . . .1.0 Lobe . . . . . . . . . . . . . . . . . . . . . . . .1.5 Vane . . . . . . . . . . . . . . . . . . . . . . . .1.5 BRIQUETTER MACHINES . . . . . . . .2.0 CAN FILLING MACHINES . . . . . . . . .1.0 CANE KNIVES . . . . . . . . . . . . ....

Couplings REX® THOMAS® FLEXIBLE DISC COUPLINGS SELECTION EXAMPLE A 250 HP electric motor is driving a dredge pump at 1,800 RPM. The shaft size of the motor is 23/8 the shaft of the pump is 21/8. The distance between the shaft ends (DBSE) is 5 inches. The environment is 150° F. HP/100 RPM = 250 HP × 100 1800 RPM = 13.89 HP/100 RPM OR Application Torque = 250HP × 63,000 = 8,750 lb.-in 1,800 Service factor (See typical service factor on page 8) = 2.0 Use chart on page 17 for HP/RPM OR Application torque requirements × Service factor – 8,750 × 2 = 17,500 Excerpt of page 17 – Series 52 Coupling...

Couplings REX® THOMAS® FLEXIBLE DISC COUPLINGS ORDERING INSTRUCTIONS PROCEDURES The following bore will be furnished when tolerance and type of fit are not specified. (Does not apply to miniature and DBZ stocked bores.) Nominal Bore Dia. Over Thru … 11/2 Bore Tolerance +0.0000-0.0005 11/2 3 +0.0000-0.001 3 6 +0.0000-0.0015 6 12 +0.0000-0.002 See page 11 for types of fits and shaft diameters. 1. 2. 3. 4. 5. 6. Quantity Coupling Size and Type Bore Sizes Keyway and Setscrew Sizes (if non-standard) Dynamic Balancing if required Additional Data (where applicable) (a) Disc Pack material (if other...

Couplings REX® THOMAS® FLEXIBLE DISC COUPLINGS ORDERING INFORMATION BORE SPECIFICATIONS Couplings will be bored in accordance with AGMAStandard 9002-A86. The type of bore fit normally supplied by Rexnord is listed below. DBZ Straight Bore – Class I Clearance Fit – Stocked Straight Bore – Interference Fit on Bore-To-Order Sizes ➀ Taper Bore – To Customer Specification AMR, BMR, CMR, SN, SF, Straight Bore – Interference Fit on All Bores ➀ SV, ST, 52, Taper bore – To Customer Specification 54RDG, 71 Series All Bores per Customer Specification 63/THP Miniatures See page 34-36 ➀ Unless specified...