• All-metal end ring seal design for maximum service life. The industry standard for over 75 years.
• Provides 300% greater lubricant capacity than o-ring style couplings.
• Greater lubricant capacity allows longer periods between scheduled lubrications and longer service life.
• Straight tooth design provides improved load distribution, lower stresses and longer life for the gear teeth.

Technical Specifications

Length Through Bore (in)	4.4375 in
Coupling Size	4
Material	Medium Carbon Steel
Bolt Type	Exposed
Outside Diameter (in)	12.5 in
Max Bore w/standard key for Flex Hub	4.25 in
Coupling Type	Gear Coupling
Bore Type	Rough Bore
Rating HP @ 100 RPM	375
Model Name	1-5-7_FR
Tooth Profile	Straight Faced Involute Hub tooth
Fastener Quantity	8
Hub Diameter (in)	9 in
Torque [Max] (in-lb)	472,000 in/lbs
Measurement System	Imperial
Compatible Bore Size [Min] (in)	0 in
Compatible Bore Size Flex Hub [Min] (in)	2.625 in
Style	FASTS
Compatible Bore Size Rigid Hub [Min] (in)	2.5 in
Speed Max (rpm)	5,260 rpm
Torque Rating (in-lb)	236,000 in/lbs
Configuration	Flex Rigid
Lube/Non-Lube	Lubricated
Overall Length (in)	9.75 in
Bolt Circle	11 in
Temperature Range	-40 to +190 °F
Features	Exposed Bolt / Flex Rigid Coupling
Sleeve Type	Flanged
Performance	Lubrication Hole
Includes	Hubs (1) Sleeve (1) Rigid (1) Seal (2)
Maximum Operating Angular Misalignment	0.5 °
Fastener Size	3/4 x 3 3/8
Bore Size Max (in)	4.25 in

General Specifications

UPC	662384010329
Weight	181.91 LB