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F Type Flex Sleeves (with O-Ring)

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

The F Type coupling consists of two flex hubs, two sleeves (with O-Rings) 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 (with O-Ring), 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.

Note: F Type Flex Sleeves generally come with the required O-Ring. Other than for replacement purposes, F Type O-Rings are generally not ordered as a stand alone product. The F Type O-Ring works for both Exposed and Shrouded Bolt styles. F Type O-Rings do not work for FA (Alloy Steel) Type couplings.

Unit of Measure

Notes

Notes 

 N/A
  • Exposed Bolt Design is standard.
  • Shrouded Bolt Design available upon request for sizes 1 through 5.5.
  • Puller Holes are standard on sizes 4 through 9.
  • Puller Holes are available for sizes 1 through 3.5 at an additional charge.
  • Interference bores with no set screws are standard unless otherwise specified.
  • Bore and keyway tolerances conform to ANSI / AGMA 9002-B04.
  • For metric bores and keyway tolerances, consult Lovejoy Engineering Section.

Specifications

Description 

 N/A F-2.5-O-RING-BUNA-N 70

Type

 N/A O-Rings

Hub Material

 N/A Buna-N Rubber

Style

 N/A O-Ring

Color

 N/A Black

Coupling Type

 N/A Gear

Weight

 N/A 0.40 lb

Complete Coupling Weight

 N/A 54.00 lb

Dimensional Data

Width

 N/A 8.000 in

Height

 N/A 6.000 in

Depth

 N/A 1.00 in

Cubic inches

 N/A 48.00000 in³

Dimensional Data of Related Coupling

Size

 N/A 2 1/2

Max. Bore (Dimensions ID1/ID2)

 N/A 3.346 in85 mm

Dimension AD

 N/A 3.470 in88.14 mm

Distance between Shaft Ends (Dimension BSE)

 N/A 0.190 in4.83 mm

Performance Data of Related Coupling

Normal Temperature Range

 N/A -40 to 212 ºF

Nominal Torque

 N/A 56700 in·lb

Max. Speed (Unbalanced)

 N/A 4400 rpm

Max. Speed (Balanced)

 N/A 6600.00 rpm

Parallel Misalignment

 N/A 0.105 in

Max. Angular Misalignment

 N/A 1.50º per Gear Mesh

Features

Features 

 N/A
  • Patented Vari-Crown® tooth form for long life
  • Standard 20° pressure angle
  • Heat treated bolts for greater strength
  • Corrosion resistant bolts and nuts for ease of maintenance
  • Provides parallel, angular misalignment and end float
  • Flex Half coupling interchangeable with industry standards