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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, Inch (Imperial) Bore & Keyway - 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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Bore Size  (in)

Keyway Size  (in)

Part Number

Description 

Bore Size 

Keyway Size 

Nominal Torque

Max Speed (Unbalanced)

Length thru Bore

Flange Diameter (Dimension FD)

Dimension HD

N/A F-2E-HUB RGD-2-11/16-5/8X5/16KW N/A 2 11/16 in N/A 5/8 x 5/16 in N/A 31500 in·lb3560 N·m N/A 6000 rpm N/A 2.280 in N/A 7.00 in177.80 mm N/A 4.860 in123.44 mm
N/A F-2.5E-HUB RGD-1-3/4-3/8X3/16KW N/A 1 3/4 in N/A 3/8 x 3/16 in N/A 56700 in·lb6410 N·m N/A 5500 rpm N/A 2.910 in N/A 8.38 in212.85 mm N/A 5.840 in148.34 mm
N/A F-3S-HUB RGD-2-15/16-3/4X3/8KW N/A 2 15/16 in N/A 3/4 x 3/8 in N/A 94500 in·lb10700 N·m N/A 4400 rpm N/A 3.410 in N/A 9.44 in239.78 mm N/A 6.840 in173.74 mm
N/A F-4E-HUB RGD-4-1/4-1"X1/2KW N/A 4 1/4 in N/A 1 x 1/2 in N/A 220500 in·lb24900 N·m N/A 3000 rpm N/A 4.440 in N/A 12.50 in317.50 mm N/A 9.250 in234.95 mm
N/A F-4E-HUB RGD-5-3/8-1-1/4X5/8KW N/A 5 3/8 in N/A 1 1/4 x 5/8 in N/A 220500 in·lb24900 N·m N/A 3000 rpm N/A 4.440 in N/A 12.50 in317.50 mm N/A 9.250 in234.95 mm
N/A F-4.5E-HUB RGD-6-3/4-1-3/4X3/4KW N/A 6 3/4 in N/A 1 3/4 x 7/8 in N/A 302400 in·lb34200 N·m N/A 2700 rpm N/A 5.030 in N/A 13.63 in346.20 mm N/A 10.380 in263.65 mm
N/A F-5E-HUB RGD-5"-1-1/4X5/8KW N/A 5 in N/A 1 1/4 x 5/8 in N/A 434700 in·lb49100 N·m N/A 2500 rpm N/A 5.690 in N/A 15.31 in388.87 mm N/A 11.560 in293.62 mm
N/A F-5E-HUB RGD-5-3/4-1-1/2X3/4KW N/A 5 3/4 in N/A 1 1/2 x 3/4 in N/A 434700 in·lb49100 N·m N/A 2500 rpm N/A 5.690 in N/A 15.31 in388.87 mm N/A 11.560 in293.62 mm
N/A F-5E-HUB RGD-6.220-1-1/2KW N/A 6 1/5 in N/A 1 1/2 x 3/4 in N/A 434700 in·lb49100 N·m N/A 2500 rpm N/A 5.690 in N/A 15.31 in388.87 mm N/A 11.560 in293.62 mm
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