• 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

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

General Specifications

UPC	662288408178
Weight	8.53 LB
Packaged Length	5.40 IN
Packaged Width	5.70 IN
Packaged Height	4.40 IN
HTC	8483.60.4040
Country of Origin	Mexico