3D CAD and 2D Drawings

Find and download 3D CAD and 2D drawings for key Timken products.

Batch CAD Cart (0)
  • Cart is empty
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.

Unit of Measure



N/A F 4E HUB RGD 4-1/4 1"X1/2KW

Hub Style

N/A Exposed Bolt


N/A Gear Coupling Hubs

Hub Material

N/A AISI 1045


N/A Bored


N/A Metallic

Bore Type

N/A Rigid w/ Keyway

Coupling Type

N/A Gear


N/A 82.36 lb

Dimensional Data

Bore Size 

N/A 4 1/4 in


N/A 4

Set Screw Style Coupling Size (Dimension T)

N/A No Setscrew

Keyway Size (W x D)

N/A 1 x 1/2 in


N/A 4.440 in112.78 mm

Length thru Bore

N/A 4.440 in

Max. Bore (Dimensions ID1/ID2)

N/A 6.500 in165.10 mm

Dimension FD

N/A 12.50 in317.50 mm

Dimension HD

N/A 9.250 in234.95 mm

Cubic inches

N/A 693.75000 in³

Performance Data

Nominal Torque

N/A 220500 in·lb24900 N·m

Max Speed (Unbalanced)

N/A 3000 rpm
By clicking Submit, you consent to the personal information you provide being used in the manner as described in our Privacy Notice, including access to that information by Timken personnel who may be located outside your home country. In addition, you agree that the CAD drawings are for your personal, one-time use only, and that you will not modify or create any compilation or derivative work using the CAD drawings or distribute or display the CAD drawings on any website or other media.