Menu
Find Your Nearest Timken Sales Office or Authorized Distributor

Our locator tool helps you connect with the right Timken partner quickly. Registered users
can save their nearest Timken Sales office or distributor in their dashboard.

Try the Locator Tool
Analyze Bearing Performance in an Application with Timken ® Syber ® Bearing System Designer

A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.

Learn More
Explore Timken Engineering Tools
Videos on YouTube

Check out our Engineering Tools video playlist on YouTube. These short walkthroughs
help you navigate Timken calculation tools, selection guides and digital resources.

View the Full Playlist
Batch CAD Cart (0) ▾
  • Cart is empty
  1. Click Here for Batch Download
Request Information
FMM Type Mill Universal Hubs - Finished (AISE Frame) 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-3-HUB-612/812 MTR FRM

Hub Style

 N/A Exposed Bolt

Type

 N/A Gear Coupling Hubs

Hub Material

 N/A AISI 1045

Style

 N/A Mill Motor Hub Bored

Color

 N/A Metallic

Coupling Type

 N/A Gear

AISE Motor Frame Size

 N/A 612/812

Weight

 N/A 23.94 lb

Dimensional Data

Bore Size (Dimension TB)

 N/A 3.6230 to 3.6240 in

Size

 N/A 3

Set Screw Style Coupling Size (Dimension T)

 N/A No Setscrew

Keyway Size (W x D)

 N/A 3/4 x 1/4 in

Max. Bore (Dimensions ID1/ID2)

 N/A 4.000 in107 mm

Dimension D

 N/A 6.840 in173.74 mm

Dimension FD

 N/A 9.44 in239.78 mm

Dimension G1

 N/A 1.690 in42.93 mm

Dimension HD

 N/A 5.630 in143.00 mm

Dimension ID1

 N/A 4.000 in101.60 mm

Dimension LTB1

 N/A 5.000 in127.00 mm

Dimension TB

 N/A 3.623 to 3.624 in92.02 to 92.05 mm

Distance between Shaft Ends (Dimension BSE)

 N/A 0.190 in4.83 mm

Cubic inches

 N/A 113.79187 in³

Performance Data

Nominal Torque

 N/A 94500 in·lb

Max. Speed (Unbalanced)

 N/A 4000 rpm

Max. Speed (Balanced)

 N/A 6000.00 rpm

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 used for AISE Motor Frames

Notes

Notes 

 N/A
  • Counterbore is required for hub size 1.5.
  • Bore taper is 1-1/4 inch per foot on diameter.
  • Exposed Bolt Design is standard.
  • Shrouded Bolt Design available upon request for sizes 1.5 through 5.5.
  • Puller Holes are standard on sizes 4 through 6.
  • Puller Holes are available for sizes 1.5 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. 1/4 inch hub standoff.
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.