Thomas Series Precision. Power. Performance. Rexnord Thomas Disc Couplings Series Applications include:

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1 Thomas Series 71-8 Precision. Power. Performance. You want a trusted name when it comes to providing engineered power transmission products that improve productivity and efficiency. Rexnord provides superior products for your industrial applications world wide. We work closely with you to reduce maintenance costs, eliminate redundant inventories and prevent equipment downtime. Rexnord Thomas Disc Couplings Series 71-8 Spacer style fl exible metallic disc coupling designed for your pump and compressor applications. The simple three piece design and piloted center member provide fast installation and repeatable balance signifi cantly reducing your installation and service time. Applications include: - pumps - compressors - general purpose machinery ATEX Certified II 2G c T5

2 Thomas Series 71-8 Features Benefits Unitized and piloted centermember Bolt on hubs Jacking bolt feature Stainless Steel discs & 8 bolt design standard Ease of installation; repeatable balance Meets API specifi cations Oversize bore capacity Ease of installation Meets API specifi cations high misalignment and axial capacity A G STANDARD HUB EXTENDED HUB E MIN. LARGE HUB B C B1 B2 Coupling Stocked C Dimensions B & B1 Hub B2 Hub A B B1 B2 Min. C Max. E G SIZE Max. Bore Max. (mm) (mm) (mm) (mm) (mm) (mm) (mm) Max. RPM Max. RPM Max. Continuous Peak Overload Weight WR 2 Change Axial Coupling Not Torque Torque Weight Change Per WR 2 Per mm of C Capacity Size Balanced Balanced (Nm) (Nm) (Kg) mm of C (Kg) (kgm 2 ) (kgm2/mm) (mm) E-05 ± E-05 ± E-05 ± E-05 ± E-04 ± E-04 ± E-04 ± E-04 ± E-04 ± E-04 ± Contact REXNORD NV, Belgium Dellingstraat Mechelen Phone: +32 / Fax: +32 / Customerservice.Belgium@rexnord.com P EN-1

3 Ex II 2GD T5 Precision, Power, Performance. You want a trusted name when it comes to providing engineered power transmission products that improve productivity and efficiency. Rexnord provides superior products for your industrial applications world wide. We work closely with you to reduce maintenance costs, eliminate redundant inventories and prevent equipment downtime. Thomas SR71 Thomas flexible Disc couplings are non-lubricated, metal flexing couplings, utilising non-wearing components for the transmission of torque and the accommodation of unavoidable shaft misalignment. Rexnord Thomas SR 71 Spacer style flexible metallic disc coupling designed for your pump applications. The simple three piece design and piloted center member provide fast installation and repeatable balance significantly reducing your installation and service time. Features Unitized and piloted centermember Bolt on hubs Jacking bolt feature Stainless Steel discs standard Applications include: Benefits Pumps General propose machinery Ease of installation; repeatable balance Meets API specifications Oversize bore capacity Ease of installation Meets API specifications with high misalignment and axial capacity

4 SR71 Torque Demands Driven machine Typical application for electirc motor or turbine driven equipment Constant torque such as Centrifugal Pumps, Blowers, and Compressors Continuous duty some torque variations including Plastic Exruders, Forced Draft Fans. Light shick loads from Metal Extruders, Cooling Towers, Log Haul Typical Service Factor 1,0 1,5 2,0 Modernate shock loading as expected Stone Crusher, Vibrating Screen 2,5 Heavy shock load with somenegative torques from Reciprocating Pumps, Compressors Consult Rexnord Engineering SR71 Coupling SIZE D1 / D2 D3 Q #m Tn n max max max A E L L2 L3 N max J #J m Change Nm min-1 mm mm mm mm mm mm mm mm mm kgm kgm / m kg kg / m , ,0032 0,0004 3,1 1, , ,006 0,0010 4,2 2, , ,012 0,0030 6,2 3, , ,036 0, , , ,076 0, , , ,125 0, , , ,180 0, , , ,328 0, , , ,540 0, , , ,890 0, , , ,250 0, ,3 *weight and inertia on maximum bore and minimum c D.B.S.E. Combinations for ISO and ANSI pumps Coupling SIZE B C Dimension B coupling overall length (mm) min min ISO D.B.S.E. (mm) Ansi D.B.S.E. (in) mm mm ,5 4, ,5 7 7,

5 Thomas SR 54 RDG Precision. Power. Performance. Rexnord Thomas Series 54 RDG Coupling You want a trusted name when it comes to providing engineered power transmission products that improve productivity and efficiency. Rexnord provides superior products for your industrial applications world wide. We work closely with you to reduce maintenance costs, eliminate redundant inventories and prevent equipment downtime. Reduced diameter close coupled flexible metallic disc coupling with high power density. The split piloted center member design provides high speed and torque ratings while permitting service of the coupling with out moving the hubs or connected equipment. Applications include: - pumps compressors general purpose machinery paper machines Thomas 54RDG Coupling Offset.indd 1 ATEX Certified II 2G c T :58:33

6 Thomas SR 54 RDG Features Axially split design Piloted split center spool Stainless Steel Discs standard Benefits Ease of installation Close coupled Meets API th edition when specifi ed High torque capacity High speed capacity Corrosion resistant Meets API when specifi ed A EXTERNAL H C C2 B F F2 C1 N F1 INTERNAL G Max. RPM (1) 54RDG Max Peak Continuous Overload Weight (2) WR (2) Axial Not Torque Torque Weight (2) WR 2 Capacity SIZE Balanced Balanced (Nm.) (Nm.) (Kg.) (Kgm 2 ) (mm) ± ± ± ± ± ± ± ± ± ± ± ± ±2.59 Larger sizes to Nm MCT available upon request (1) Contact Rexnord for explanation of RPM limits and balancing recommendations (2) Weight and WR2 with standard length hubs, maximum bore and standard C Torque Demands Driven Machine Typical Application for Electric Motor or Turbine Driven Equipment Constant torque such as centrifugal pumps blowers and compressors Continuous duty with some torque variations including plastic extruders and forced draft fans Light shock loads from metal extruders, cooling towers and log haulers Moderate shock loading as expected from a car dumper, stone crusher, vibrating screen Heavy shock load with some negative torques from reciprocating pumps, compressors, reversing turnout tables Frequent torque reversals such as reciprocating compressors with frequent torque reversals which do not necessarily include reverse rotations Typical Service Factor Consult Rexnord Engineering Max Bore* Max Bore* A B C C1** F F1** H N G C2*** F2*** SIZE Internal (mm) External (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) * Non-bored hubs available upon request. **One internal and one external hub. ***Two external hubs. Contact REXNORD NV, Belgium Dellingstraat Mechelen Phone: +32 / Fax: +32 / Customerservice.Belgium@rexnord.com P EN-1 Thomas 54RDG Coupling Offset.indd :58:53