• 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

Bolt Type	Exposed
Fastener Quantity	6
Rating HP @ 100 RPM	90
Outside Diameter (in)	8.375 in
Model Name	1-5-7_FR
Tooth Profile	Straight Faced Involute Hub tooth
Length Through Bore (in)	2.90625 in
Max Bore w/standard key for Flex Hub	2.75 in
Bore Type	Rough Bore
Coupling Size	2.5
Coupling Type	Gear Coupling
Material	Medium Carbon Steel
Hub Diameter (in)	5.75 in
Speed Max (rpm)	7,900 rpm
Style	FASTS
Compatible Bore Size [Min] (in)	0 in
Torque Rating (in-lb)	56,700 in/lbs
Torque [Max] (in-lb)	113,400 in/lbs
Measurement System	Imperial
Lube/Non-Lube	Lubricated
Compatible Bore Size Rigid Hub [Min] (in)	1.375 in
Compatible Bore Size Flex Hub [Min] (in)	0 in
Configuration	Flex Rigid
Overall Length (in)	4.969 in
Sleeve Type	Flanged
Fastener Size	5/8 x 2 3/4
Bore Size Max (in)	2.75 in

General Specifications

UPC	662384010299
Weight	54.21 LB