F Type Flex Hubs, Rough Stock Bore

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

The F Type coupling consists of two flex hubs, two sleeves 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 F Type has a max angular misalignment of 3.0 degrees (1.5 degrees per gear mesh).

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).

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

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Item #

Description 

Nominal Torque

Max Speed (Unbalanced)

Length thru Bore

Max. Bore

Dimension HD

Overall Length

Flange Diameter (Dimension FD)

Distance between Shaft Ends (Dimension BSE)

N/A F 1 HUB RSB N/A 7600 in·lb850 N·m N/A 6000 rpm N/A 1.690 in N/A 1.625 in42 mm N/A 2.310 in58.67 mm N/A 3.50 in N/A 4.56 in N/A 0.13 in
N/A F 1.5 HUB RSB N/A 18900 in·lb2140 N·m N/A 5500 rpm N/A 1.940 in N/A 2.125 in56 mm N/A 3.000 in76.20 mm N/A 4.00 in N/A 6.00 in N/A 0.13 in
N/A F 2 HUB RSB N/A 31500 in·lb3560 N·m N/A 5000 rpm N/A 2.440 in N/A 2.750 in73 mm N/A 4.000 in101.60 mm N/A 5.00 in N/A 7.00 in N/A 0.13 in
N/A F 2.5 HUB RSB N/A 56700 in·lb6410 N·m N/A 4400 rpm N/A 3.030 in N/A 3.250 in85 mm N/A 4.630 in117.60 mm N/A 6.25 in N/A 8.38 in N/A 0.19 in
N/A F 3 HUB RSB N/A 94500 in·lb10700 N·m N/A 4000 rpm N/A 3.590 in N/A 4.000 in107 mm N/A 5.630 in143.00 mm N/A 7.38 in N/A 9.44 in N/A 0.19 in
N/A F 3.5 HUB RSB N/A 151200 in·lb17100 N·m N/A 3500 rpm N/A 4.190 in N/A 4.625 in125 mm N/A 6.5 in165.10 mm N/A 8.63 in N/A 11.00 in N/A 0.25 in
N/A F 4 HUB RSB N/A 220500 in·lb24900 N·m N/A 3000 rpm N/A 4.750 in N/A 5.375 in145 mm N/A 7.500 in190.50 mm N/A 9.75 in N/A 12.50 in N/A 0.25 in
N/A F 4.5 HUB RSB N/A 302400 in·lb34200 N·m N/A 2700 rpm N/A 5.310 in N/A 6.000 in165 mm N/A 8.500 in215.90 mm N/A 10.94 in N/A 13.63 in N/A 0.31 in
N/A F 5 HUB RSB N/A 434700 in·lb49100 N·m N/A 2500 rpm N/A 6.030 in N/A 6.500 in180 mm N/A 9.500 in241.30 mm N/A 12.38 in N/A 15.31 in N/A 0.31 in
N/A F 5.5 HUB RSB N/A 573300 in·lb64800 N·m N/A 2200 rpm N/A 6.910 in N/A 7.500 in200 mm N/A 10.50 in266.70 mm N/A 14.13 in N/A 16.75 in N/A 0.31 in
N/A F 6 HUB RSB N/A 749700 in·lb84700 N·m N/A 2100 rpm N/A 7.41 in N/A 8.250 in225 mm N/A 11.50 in292.10 mm N/A 16.13 in N/A 18.00 in N/A 0.31 in
N/A F 7 HUB RSB N/A 1008000 in·lb113900 N·m N/A 2000 rpm N/A 8.690 in N/A 9.5 in255 mm N/A 13.000 in330.20 mm N/A 17.75 in N/A 20.75 in N/A 0.38 in
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