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FLA Type (Flex-Flex All-Metal Labyrinth Seal) Flex Sleeves

For use with FLA (Flex-Flex All-Metal Labyrinth Seal) and FLAFR (Flex-Rigid All-Metal Labyrinth Seal) couplings.

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

The FLAFR Type coupling consists of one special FLA flex hub, one FA rigid hub, one FLA flex 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 FLAFR Type has a max angular misalignment of 1.5 degrees (1.5 degrees per gear mesh).
Unit of Measure

Specifications

Description 

 N/A FLA-4E-SLEEVE

Hub Style

 N/A Exposed Bolt

Max. Bore - Standard Keyway (Dimensions ID1/ID2)

 N/A 4.250 in107 mm

Type

 N/A Sleeves

Material

 N/A All Metal

Style

 N/A Labryrinth Seal Exposed Bolt Sleeve

Application

 N/A Driver and Driven

Weight

 N/A 42.50 lb

Complete Coupling Weight

 N/A 185.00 lb

Dimensional Data

Size 

 N/A 4 in

Length thru Bore

 N/A 4.750 in120.65 mm

Puller Hole Size

 N/A 7/8-9

Distance between Shaft Ends (Dimension BSE)

 N/A 0.25 in6.35 mm

Dimension D

 N/A 9.250 in234.95 mm

Center Line to Center Line of Teeth

 N/A 8.000 in203.20 mm

Dimension FD

 N/A 12.50 in317.50 mm

Dimension W

 N/A 2.500 in63.50 mm

Cubic inches

 N/A 742.18750 in³

Performance Data

Max. Speed (Unbalanced)

 N/A 5260.00 rpm

Max. Speed (Balanced)

 N/A 7890.00 rpm

Nominal Torque

 N/A 283800.00 in·lb

Max. Angular Misalignment (per Gear Mesh)

 N/A 1.50 º

Parallel Misalignment

 N/A 0.700 in

Features

Features 

 N/A
  • All-Metal Labyrinth Seals
  • AISI 4140 Alloy Steel Construction
  • 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

Notes

Notes 

 N/A
  • Exposed Bolt Design is standard.
  • Shrouded Bolt Design available upon request for sizes 1 through 5.
  • Puller Holes are standard on sizes 4 through 7.
  • 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.
  • Inch bore and keyway tolerances conform to AGMA 9002-B04.
  • For metric bore and keyway tolerances, consult Lovejoy Engineering Section.
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