• Morse Mechanical Clutches offer the most complete and versatile selection of backstop, overriding, and index Clutches in the industry
• PB series clutch features precision formed cams providing high torque capacities with excellent wear life. These models are suitable for general duty applications.
• A bonze seal maintains race concentricity. They a asymmetrical by design, so must be ordered according to rotation requirements.

Technical Specifications

RPM Max. - Inner Race	1200
RPM Max. - Outer Race	300
Keyway	3/8 x 3/16
Groove Diameter	2.391/2.379
Length to Groove	1.311/1.321
Snap Ring (Not Furnished)	RST250
Keyway Length (in)	1.125 in
Hub Diameter (in)	2.375 in
Configuration	LH
Type	CAM Clutches
Mounting Diameter (in)	2.500/2.499 in
Major Diameter Width (in)	1.875 in
Model	PB-12A
Length to Snap Ring Groove (in)	2.0625 in
Key for Bore Size	5/16 x 5/32
Groove Width	.120/.130
Overall Width (in)	3.875 in
Mounting Length (in)	1.4375 in
Overall Diameter (in)	4.4375 in
Lubrication Type	Grease
Add'l Bearing Support Requirement	No
Overrunning Clutch	Yes
Backstopping Clutch	Yes
Product Type	PB Series
Indexing Clutch	Yes
Bore Size (in)	1.375 in
Rated Torque Capacity (ft.-lbs.)	1,350
Inner Race Width (in)	2.063 in
RPM Max. -inner Race	1,200
Outer Width (in)	3.313 in

General Specifications

UPC	662288408185
Weight	8.50 LB
Packaged Length	5.19 IN
Packaged Width	5.19 IN
Packaged Height	4.57 IN
HTC	8483.60.4040
Country of Origin	Mexico