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The Foot Mounted Posistop Brake is similar in design to the Posidyne Clutch/Brake incorporating many of the same features including multiple friction surfaces, lubrication and cooling by recirculating fluid. Six sizes are available with torque ratings up to 1800 Lb.Ft. There are three control logics to select from:
S = Air Set Brake / Spring Release
A = Medium Spring Set Brake / Air Release
B = Heavy Spring Set Brake / Air Release

The spring set units are preset at the factory and are not adjustable. The air set units are adjustable over the full range.
Foot Mounted Posistop Brakes
Unit of Measure
Items Foot Mounted Posistop Brakes
PS 03-S
PS 03-S Foot Mounted Posistop Brake 		Foot Mounted Posistop Brakes
PS 03-A
PS 03-A Foot Mounted Posistop Brake 		Foot Mounted Posistop Brakes
PS 03-B
PS 03-B Foot Mounted Posistop Brake 		Foot Mounted Posistop Brakes
PS 05-S
PS 05-S Foot Mounted Posistop Brake 		Foot Mounted Posistop Brakes
PS 05-A
PS 05-A Foot Mounted Posistop Brake
Description N/A The Foot Mounted Posistop Brake is similar in design to the Posidyne Clutch/Brake incorporating many of the same features including multiple friction surfaces, lubrication and cooling by recirculating fluid. Six sizes are available with torque ratings up to 1800 Lb.Ft. There are three control logics to select from:
S = Air Set Brake / Spring Release
A = Medium Spring Set Brake / Air Release
B = Heavy Spring Set Brake / Air Release

The spring set units are preset at the factory and are not adjustable. The air set units are adjustable over the full range.
Static Brake Torque Spring Set N/A N/A 50 lb·ft N/A 100 lb·ft N/A N/A 95 lb·ft
Dynamic Brake Torque Spring Set N/A N/A 42 lb·ft N/A 85 lb·ft N/A N/A 80 lb·ft
Static Brake Torque with Air Assist N/A 127 lb·ft N/A N/A N/A 290 lb·ft N/A
Dynamic Brake Torque with Air Assist N/A 108 lb·ft N/A N/A N/A 245 lb·ft N/A
Maximum Air Pressure Brake Torque N/A 60 psi N/A N/A N/A 60 psi N/A
Maximum Speed N/A 3600 rpm
Thermal Rating N/A 45 HP Sec/Min0.75 hp N/A 45 HP Sec/Min0.75 hp N/A 45 HP Sec/Min0.75 hp N/A 60 HP Sec/Min1.0 hp N/A 60 HP Sec/Min1.0 hp
Air Volume per Engagement N/A 7.6 in³
Cyclic Inertia N/A 0.10 lb·ft² N/A 0.10 lb·ft² N/A 0.10 lb·ft² N/A 0.14 lb·ft² N/A 0.14 lb·ft²
Weight N/A 125 ft·lb N/A 125 ft·lb N/A 125 ft·lb N/A 174 ft·lb N/A 174 ft·lb
Foot Mounting Dimensions A N/A 10.25 in
Foot Mounting Dimensions D N/A 4.5 in N/A 4.5 in N/A 4.5 in N/A 6.5 in N/A 6.5 in
Foot Mounting Dimensions E N/A 3.31 in N/A 3.31 in N/A 3.31 in N/A 3.50 in N/A 3.50 in
Foot Mounting Dimensions 2Fs N/A 6.5 in N/A 6.5 in N/A 6.5 in N/A 9.09 in N/A 9.09 in
Foot Mounting Dimensions 2Ft N/A 9.13 in N/A 9.13 in N/A 9.13 in N/A 12.02 in N/A 12.02 in
Foot Mounting Dimensions G N/A 0.50 in N/A 0.50 in N/A 0.50 in N/A 0.75 in N/A 0.75 in
Foot Mounting Dimensions H N/A 0.44 in N/A 0.44 in N/A 0.44 in N/A 0.56 in N/A 0.56 in
Foot Mounting Dimensions O N/A 10.38 in N/A 10.38 in N/A 10.38 in N/A 12.38 in N/A 12.38 in
Foot Mounting Dimensions BSV N/A 5.19 in N/A 5.19 in N/A 5.19 in N/A 5.75 in N/A 5.75 in
Overall Length C1s N/A 13.25 in N/A 13.25 in N/A 13.25 in N/A 16.50 in N/A 16.50 in
Overall Length C1t N/A 15.88 in N/A 15.88 in N/A 15.88 in N/A 19.42 in N/A 19.42 in
Shaft Dimensions a/Fa N/A 5/16 x 5/32 in N/A 5/16 x 5/32 in N/A 5/16 x 5/32 in N/A 3/8 x 3/16 in N/A 3/8 x 3/16 in
Shaft Dimensions U/FU N/A 1-3/8 in N/A 1-3/8 in N/A 1-3/8 in N/A 1-5/8 in N/A 1-5/8 in
Shaft Dimensions V/FV N/A 3.50 in N/A 3.50 in N/A 3.50 in N/A 4.00 in N/A 4.00 in
Bottom Porting-AA N/A 1/4 in
Top Porting-AA N/A 1/4 in
Typical Applications N/A Machine Shaft Brake Motor Shaft Brake
Note N/A Tandem or double stack units are available. Ratings are twice the values given for above single stack units.
Weights given are for a Single Stack Unit. See page 16.16 for Tandem Unit weights.
“s” denotes a Single Unit and “t” denotes a Tandem Unit.