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  • FRR Type Gear Coupling
  • FFR Type Gear Coupling
  • FFR Type Gear Coupling Diagram
  • FRR Type Gear Coupling Diagram
F Type Rigid Hubs, Solid & Rough Stock Bore - Exposed and Shrouded Bolt Designs

For use with FFR (Flex-Rigid) or FRR (Rigid-Rigid) couplings.

The FFR Type coupling consists of one flex hub, one rigid hub, one sleeve, and one accessory kit. Exposed bolts (E) are the standard design for this coupling, though shrouded bolt (S) designs are available upon request through size 5.5. The FFR Type has a max angular misalignment of 1.5 degrees (1.5 degrees per gear mesh).

The FRR Type coupling consists of two rigid hubs and one accessory kit. Exposed bolts (E) are also the standard design for this coupling, though shrouded bolt (S) designs are available upon request through size 5.5. The FRR Type coupling does not accommodate for any angular misalignment.

For larger torques, consider the FHD Type gear coupling in sizes 10 through 30.

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Hub Style

Part Number

Description 

Hub Style

Nominal Torque

Max Speed (Unbalanced)

Length thru Bore

Max. Bore (Dimensions ID1/ID2)

Dimension FD

Dimension HD

N/A F-1S-HUB RGD-W/CENTER N/A Shrouded Bolt N/A 7600 in·lb850 N·m N/A 6000 rpm N/A 1.560 in N/A 2.125 in56 mm N/A 4.56 in115.82 mm N/A 3.06 in77.72 mm
N/A F-1E-HUB RGD-W/CENTER N/A Exposed Bolt N/A 7600 in·lb850 N·m N/A 6000 rpm N/A 1.560 in N/A 2.125 in56 mm N/A 4.56 in115.82 mm N/A 3.06 in77.72 mm
N/A F-1.5S-HUB RGD-W/CENTER N/A Shrouded Bolt N/A 18900 in·lb2140 N·m N/A 5500 rpm N/A 1.840 in N/A 2.813 in76 mm N/A 6.00 in152.40 mm N/A 3.97 in100.84 mm
N/A F-1.5E-HUB RGD-W/CENTER N/A Exposed Bolt N/A 18900 in·lb2140 N·m N/A 5500 rpm N/A 1.840 in N/A 2.813 in76 mm N/A 6.00 in152.40 mm N/A 3.97 in100.84 mm
N/A F-2S-HUB RGD-W/CENTER N/A Shrouded Bolt N/A 31500 in·lb3560 N·m N/A 5000 rpm N/A 2.280 in N/A 3.500 in95 mm N/A 7.00 in177.80 mm N/A 4.860 in123.44 mm
N/A F-2E-HUB RGD-W/CENTER N/A Exposed Bolt N/A 31500 in·lb3560 N·m N/A 5000 rpm N/A 2.280 in N/A 3.500 in95 mm N/A 7.00 in177.80 mm N/A 4.860 in123.44 mm
N/A F-2.5S-HUB RGD-W/CENTER N/A Shrouded Bolt N/A 56700 in·lb6410 N·m N/A 4400 rpm N/A 2.910 in N/A 4.250 in114 mm N/A 8.38 in212.85 mm N/A 5.840 in148.34 mm
N/A F-2.5E-HUB RGD-W/CENTER N/A Exposed Bolt N/A 56700 in·lb6410 N·m N/A 4400 rpm N/A 2.910 in N/A 4.250 in114 mm N/A 8.38 in212.85 mm N/A 5.840 in148.34 mm
N/A F-3S-HUB RGD-W/CENTER N/A Shrouded Bolt N/A 94500 in·lb10700 N·m N/A 4000 rpm N/A 3.410 in N/A 4.875 in134 mm N/A 9.44 in239.78 mm N/A 6.840 in173.74 mm
N/A F-3E-HUB RGD-W/CENTER N/A Exposed Bolt N/A 94500 in·lb10700 N·m N/A 4000 rpm N/A 3.410 in N/A 4.875 in134 mm N/A 9.44 in239.78 mm N/A 6.840 in173.74 mm
N/A F-3.5S-HUB RGD-W/CENTER N/A Shrouded Bolt N/A 151200 in·lb17100 N·m N/A 3500 rpm N/A 3.970 in N/A 5.625 in150 mm N/A 11.00 in279.40 mm N/A 7.91 in200.91 mm
N/A F-3.5E-HUB RGD-W/CENTER N/A Exposed Bolt N/A 151200 in·lb17100 N·m N/A 3500 rpm N/A 3.970 in N/A 5.625 in150 mm N/A 11.00 in279.40 mm N/A 7.91 in200.91 mm
N/A F-4E-HUB RGD-W/CENTER N/A Exposed Bolt N/A 220500 in·lb24900 N·m N/A 3000 rpm N/A 4.440 in N/A 6.500 in176 mm N/A 12.50 in317.50 mm N/A 9.250 in234.95 mm
N/A F-4S-HUB RGD-W/CENTER N/A Shrouded Bolt N/A 220500 in·lb24900 N·m N/A 3000 rpm N/A 4.440 in N/A 6.500 in176 mm N/A 12.50 in317.50 mm N/A 9.250 in234.95 mm
N/A F-4E-HUB RGD-130MM RSB N/A Exposed Bolt N/A 220500 in·lb24900 N·m N/A 3000 rpm N/A 4.440 in N/A 6.500 in176 mm N/A 12.50 in317.50 mm N/A 9.250 in234.95 mm
N/A F-4.5E-HUB RGD-W/CENTER N/A Exposed Bolt N/A 302400 in·lb34200 N·m N/A 2700 rpm N/A 5.030 in N/A 7.625 in202 mm N/A 13.63 in346.20 mm N/A 10.380 in263.65 mm
N/A F-4.5S-HUB RGD-W/CENTER N/A Shrouded Bolt N/A 302400 in·lb34200 N·m N/A 2700 rpm N/A 5.030 in N/A 7.625 in202 mm N/A 13.63 in346.20 mm N/A 10.380 in263.65 mm
N/A F-5S-HUB RGD-RSB N/A Shrouded Bolt N/A 434700 in·lb49100 N·m N/A 2500 rpm N/A 5.690 in N/A 8.750 in230 mm N/A 15.31 in388.87 mm N/A 11.560 in293.62 mm
N/A F-5E-HUB RGD-RSB N/A Exposed Bolt N/A 434700 in·lb49100 N·m N/A 2500 rpm N/A 5.690 in N/A 8.750 in230 mm N/A 15.31 in388.87 mm N/A 11.560 in293.62 mm
N/A F-5.5E-HUB RGD-RSB N/A Exposed Bolt N/A 573300 in·lb64800 N·m N/A 2200 rpm N/A 6.910 in N/A 9.5 in260 mm N/A 16.75 in425.45 mm N/A 12.72 in323.09 mm
N/A F-5.5S-HUB RGD-RSB N/A Shrouded Bolt N/A 573300 in·lb64800 N·m N/A 2200 rpm N/A 6.910 in N/A 9.5 in260 mm N/A 16.75 in425.45 mm N/A 12.72 in323.09 mm
N/A F-6E-HUB RGD-RSB N/A Exposed Bolt N/A 749700 in·lb84700 N·m N/A 2100 rpm N/A 7.41 in N/A 10.500 in285 mm N/A 18.00 in457.20 mm N/A 14.000 in355.6 mm
N/A F-7E-HUB RGD-RSB N/A Exposed Bolt N/A 1008000 in·lb113900 N·m N/A 2000 rpm N/A 8.690 in N/A 12.000 in320 mm N/A 20.75 in527.05 mm N/A 15.75 in400.05 mm
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