Request Information
FMM Type Mill Universal Hubs - Rough Stock Bore

The FMM Type coupling consists of one universal  hub (FMM Mill Type), one standard F Type flex hub, two standard F Type flex sleeves, and one accessory kit. This coupling is supplied with exposed bolts as standard, with shrouded bolts are available upon request through size 5.5.

The FMM Type Mill Universal hub accommodates AISE Mill Motor frame sizes (with the two sleeves and second hub being standard F Type).

Unit of Measure

Specifications

Description 

 N/A FMM-2.5-HUB-RSB

Hub Style

 N/A Exposed Bolt

Type

 N/A Gear Coupling Hubs

Hub Material

 N/A AISI 1045

Style

 N/A Unbored

Color

 N/A Metallic

Bore Type

 N/A Rough Stock Bore

Coupling Type

 N/A Gear

Weight

 N/A 25.00 lb

Complete Coupling Weight

 N/A 71.00 lb

Dimensional Data

Bore Size

 N/A 1.440 in37.00 mm

Max. Bore (Dimensions ID1/ID2)

 N/A 3.250 in85 mm

Size

 N/A 2 1/2

Set Screw Style Coupling Size (Dimension T)

 N/A No Setscrew

Depth

 N/A 6.500 in

Overall Length

 N/A 9.72 in246.89 mm

Dimension D

 N/A 5.840 in148.34 mm

Dimension FD

 N/A 8.38 in212.85 mm

Dimension HD

 N/A 4.630 in117.60 mm

Distance between Shaft Ends (Dimension BSE)

 N/A 0.190 in4.83 mm

Length Through Bore of Universal Hub (LTB1)

 N/A 6.500 in165.10 mm

Cubic inches

 N/A 139.33985 in³

Performance Data

Nominal Torque

 N/A 56700 in·lb6410 N·m

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
  • Long Universal Hub supplied to customer specifications with straight or tapered bores

Notes

Notes 

 N/A
  • LTB1 Dimensions are the maximum lengths of Universal Hubs kept in stock and altered to customer specifications. Longer length hubs are made to order.
  • 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 6.
  • 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 ANSI / AGMA 9002-B04.
  • For metric bore and keyway tolerances, consult Lovejoy Engineering Section.