G-Series – GC Model Key Features.

Standard Design Features:

  • Interchangeable with Rexnord Thomas and TB Woods. Positioned to be interchangeable with the gas compression couplings from Rexnord Thomas and TB Woods with similar mass, inertia, and stiffness
  • Stainless steel discs and alloy steel hubs are standard
  • Improved ease of installation with unitized disc packs
  • Reduced disc flaring and disc flexing forces with scalloped discs

Custom Design Options:

  • Ability to tune mass, inertia, and stiffness with custom design options
  • API compliant versions available

Diagram G-Series – GC Model

G-Series – GC Model Competitive Replacement Guides.

G-Series Competitive Replacement Guide for GA/GC

View the guide to properly identifying the PSC Coupling size to replace your current disc coupling brand. Custom options are also available to meet your exact needs.

Product Demo Video.

G-Series – GC Model Specific Details.

Ratings

Coupling SizeContinuous TorquePeak TorqueMax. RPMMax. Bore KeyedMax. Bore KeylessMisalignment Capacity 1Weight 2Inertia 2
(in-lbs)(Nm)(in-lbs)(Nm)(in.)(mm)(in.)(mm)Angular (deg)Axial (in)Axial (mm)(lbs.)(kg)(lb-in^2)(kg-m^2)
GC26221,0002,37325,2002,8472,5003.25082.63.62592.10.33±0.043±1.0954241,4700.430
GC31236,0004,06743,2004,8812,5003.87598.44.375111.10.33±0.051±1.3070321,7900.524
GC35052,8005,96663,4007,1632,3004.250108.04.750120.70.33±0.056±1.4284382,0000.585
GC37579,4008,97195,30010,7672,2004.625117.55.250133.40.33±0.062±1.57102462,4200.708
GC42588,0009,943105,60011,9312,0005.000127.05.625142.90.33±0.067±1.70121552,8900.846
GC450136,10015,377163,40018,4621,9005.250133.46.000152.40.33±0.072±1.83145663,6001.05
GC500200,80022,687240,90027,2181,8006.000152.46.750171.50.33±0.082±2.0825211413,0003.80
GC550275,10031,082330,10037,2961,8006.750171.57.500190.50.33±0.092±2.3433915418,0005.27
GC600358,90040,550430,70048,6631,8007.375187.38.250209.60.33±0.102±2.5942019021,5006.29
GC700456,50051,578547,80061,8931,5008.375212.79.375238.10.33±0.115±2.9262028138,30011.2
GC750644,90072,864773,90087,4391,5009.000228.610.125257.20.33±0.125±3.1871632545,70013.4
GC800813,80091,947976,500110,3301,2009.750247.711.000279.40.33±0.136±3.4589840762,20018.2
GC850898,700101,5391,078,400121,8431,10010.250260.411.625295.30.33±0.144±3.661,05047678,20022.9
GC9251,281,300144,7671,537,500173,7141,00011.250285.812.750323.90.33±0.156±3.961,320599110,00032.2
1 Angular values represent misalignment per disc pack. Axial values represent misalignment for double flexing coupling.
2 Weight and inertia values represent total coupling assembly with maximum keyed bore diameter and standard flywheel adapter ("FW" Std.) diameter.

Dimensional Data

Coupling SizeABHLCOLFW Std.F
(in)(mm)(in)(mm)(in)(mm)(in)(mm)(in)(mm)(in)(mm)(in)(mm)
GC2626.88174.84.50114.32.8873.24.47113.57.35186.718.375466.730.4411.2
GC3128.12206.25.44138.23.3885.95.34135.68.72221.518.375466.730.5012.7
GC3509.12231.66.00152.43.7595.35.89149.69.64244.918.375466.730.5012.7
GC37510.06255.56.50165.14.00101.66.62168.110.62269.718.375466.730.5614.2
GC42511.00279.47.00177.84.25108.07.18182.411.43290.318.375466.730.6215.7
GC45011.88301.87.44189.04.50114.37.68195.112.18309.418.375466.730.6917.5
GC50013.44341.48.38212.95.00127.08.75222.313.75349.326.500673.100.7519.1
GC55015.00381.09.44239.85.50139.79.89251.215.39390.926.500673.100.8822.4
GC60016.75425.510.31261.96.00152.410.89276.616.89429.026.500673.101.0025.4
GC70018.94481.111.75298.57.00177.812.48317.019.48494.828.875733.431.0025.4
GC75020.62523.712.62320.57.25184.213.54343.920.79528.128.875733.431.1228.4
GC80022.38568.513.75349.37.75196.914.74374.422.49571.228.875733.431.2531.8
GC85023.75603.314.50368.38.25209.615.86402.824.11612.428.875733.431.2531.8
GC92525.75654.115.88403.49.00228.617.24437.926.24666.528.875733.431.3835.1

Flywheel Adapters

Coupling SizeStandard Adapter Diameter ("FW") Tolerances (in / mm) & Available Adapter Sizes
8.500
8.495		9.500
9.495		10.375
10.370		12.375
12.370		13.875
13.870		18.375
18.370		20.375
20.370		22.500
22.495		26.500
26.495		28.875
28.870
215.90
215.77		241.30
241.17		263.53
263.40		314.33
314.20		352.43
352.30		466.73
466.60		517.53
517.40		571.50
571.37		673.10
672.97		733.43
733.30
GC262OOOOOSOO
GC312OOOOSOO
GC350OOSOO
GC375OOSOO
GC425OSOOO
GC450SOOO
GC500OOOSO
GC550OOOSO
GC600OOOSO
GC700OOOS
GC750OS
GC800OS
GC850S
GC925S
S = Standard adapter sizes.     O = Optional adapter sizes.

Flywheel Bolting

Standard Adapter "FW" Dia.SAE BoltingHeavy Duty Bolting
Bolt Circle Dia.Qty. of holesHole Dia.Bolt Circle Dia.Qty. of holesHole Dia.
(in)(mm)(in)(mm)(in)(mm)(in)(mm)(in)(mm)
8.500215.907.875200.0360.348.67.500190.5080.4110.4
9.500241.308.750222.2580.348.68.625219.0880.4711.9
10.375263.539.625244.4860.4110.49.500241.3080.4711.9
12.375314.3311.625295.2880.4110.411.500292.1080.5313.5
13.875352.4313.125333.3880.4110.412.500317.5080.6616.8
18.375466.7317.250438.1580.5313.516.750425.4580.7819.8
20.375517.5319.250488.9580.5313.518.500469.9080.9123.1
22.500571.5021.375542.9360.6616.820.500520.7081.0326.2
26.500673.1025.250641.35120.6616.824.500622.30121.0326.2
28.875733.4327.250692.15120.7819.826.875682.63121.0326.2
3 Flywheel mounting hardware is not supplied with coupling.

Explore Our Other Products.

Series 57

Drop-Out Spacer Disc Couplings

High torque density, lower mass, and better balance allow for much longer life of connected equipment

  • API 610 / 671 Compliant

Series 47

Drop-Out Spacer Disc Couplings

High torque density, lower mass, and better balance allow for much longer life of connected equipment

  • API 610 / 671 Compliant

G-Series

GC Model for Gas Compression

Interchangeable with Thomas CMR and TB Woods FSH with similar mass elastic characteristics

  • Alloy hub and stainless steel disc are standard

What Sets Us Apart.

Alignment Driven Success.

Our expertise in flexible disc couplings resolves the challenges of your demanding applications. We bring innovation to disc coupling design, integration, and customer support that make your life easier.