Basic Design Clutch and Brake Products
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ALTRA MOTION Basic Design Clutches/Brakes ALTRA MOTION

Stationary Field Design ■ Flange or bearing mounted styles ■ The SF design eliminates collector rings and brush-holder. Ideal for adverse environmental conditions. Mounting tolerances are generally more critical than the PC design. Stationary Field Design ■ The SFC Series clutch couplings employ the same basic components as the SF design except for a splined hub and adapter which serves as a coupling for in-line shaft applications. Brake ■ The PB Series brakes consist of a magnet, armature and mounting hub in a very simple and extremely compact design. Primary Design ■ Current is carried...

Custom design with off-the-shelf components For maximum mounting versatility ­ and design flexibility Custom Design prod­ cts may be designed into the u most de­ and­ng and space restrictive m i appli­ a­ions. They require additional c t en­gi­neer­ing and assembly capability, but their lower initial cost and wider range of sizes makes them an ideal con­sid­er­ation for many ap­pli­ca­tions. Like all Warner Electric packaged clutches and brakes, they never need adjustment, and they are built ­ to the same standards of quality and performance. Wide Range of Sizes Assembled around the basic...

Custom Design Clutches and Brakes Product Line Clutches SF series Clutch Couplings Page 14 Stationary Field Design n collector rings and brushholder. Ideal for adverse environmental conditions. Mounting tolerances are generally more critical than the PC design. Current is carried through brushes and the collector ring to the rotating magnet. The PC design is less expensive than the SF design. Application A clutch is used when the load is driven to a parallel shaft through sheaves, belts, sprockets or gears. Stationary Field Design Flange or bearing mounted SFC series The SFC Series clutch...

Custom Design Clutches and Brakes Product Line Brakes Clutch/Brake Combinations Primary Style Clutch/Brake The PB Series brakes consist of a magnet, armature and mounting hub in a very simple and extremely compact design. Motor Brake MB motor brakes are composed of a PB Series brake mounted on a NEMA C-face adapter and cover assembly. combine a PC clutch and a PB brake into one compact design. A clutch-brake is used to combine the func­ions of a clutch and a brake t in a compact assembly. A brake is used when a rotating load is to be stopped. SFPBC series Stationary Field Clutch/Brake...

Custom Design Clutches and Brakes Design Features Versatility and Flexibility Coil Available in various voltages for each model. Warner Electric controls (see controls section) provide optimum performance and controllability. All Warner Electric units are either UL listed or recognized. All are CSA certified. Armature Fluted and segmented. Designed as a cooling device to dissipate ­ max­i­mum heat and increase life. Magnet or Field Brake magnet mounts to any machine member. Warner Electric clutches are available in flange mount or bearing mount designs. Bushings Standard industry bushings...

Custom Design Clutches and Brakes Design Features Two clutch designs Antibacklash Armature Autogap™ System • Positive Disengagement The Autogap is a system de­ igned to s sep­ ­ate the armature from the friction ar face. This spacing is automatic and occurs prior to total mag­ et­c decay, n i effectively eliminating noise by pre­ ent­ng v i drag. The leaf springs which attach armature to hub pull the armature back sharply when the coil is deenergized, pro­ id­ ­ v ing positive disen­ age­ ent. Wear, g m heat, and noise caused by dragging armatures are eliminated. • Bi-Directional Operation...

SF (Stationary Field Clutch) Clutch Couplings SFC (Stationary Field Clutch Coupling) Model Max. Rated Number Torque Outside Overall Diameter Length (inches) (inches) Page No. Model Max. Rated Number Torque Outside Overall Diameter Length (inches) (inches) Page No. Outside Overall Model Max. Rated Diameter Length Number Torque (inches) (inches) Page No. PCC (Primary Clutch Coupling) Outside Overall Model Max. Rated Diameter Length All model numbers are Normal Duty unless otherwise designated. See Nomenclature Table on next page for more detailed information...

PB (Primary Brakes) Outside Model Max. Rated Diameter Number Torque (inches) Custom Design Clutches and Brakes Overall Length (inches) Page No. Selection Clutch/Brake Combinations PCB Clutch/Brake (Primary Clutch Brake) Outside Overall Model Max. Rated Diameter Length Number Torque (inches) (inches) Page No. SFPBC Clutch/Brake Coupling (Stationary Clutch Brake Coupling) Model Number Outside Diameter (inches) Overall Length (inches) Model Max. Rated Number Torque Outside Overall Diameter Length (inches) (inches) PCBC Clutch/Brake Coupling (Primary Clutch Brake Coupling)...

Custom Design Clutches and Brakes Selection Clutch Selection Determine the shaft speed at the clutch location. The number listed at the intersection of the horse­ ow­ p er and speed lines is the size unit you require. EXAMPLE: START AP­PLI­CA­TION Function: To couple the output shaft of a motor in line with the input shaft of a reducer. Type: A clutch coupling will couple two in line shafts. Size: The motor horsepower is 1/2 and the speed is 1800 rpm. On the clutch chart opposite follow across the 1/2 HP line to the 1800 rpm column. A size 250 clutch coupling will handle this application....

Custom Design Clutches and Brakes Brake Selection Determine the shaft speed at the brake location. The number listed at the intersection of the horsepower and speed lines is the size unit you require. MOTOR BRAKE Frame Sizes are listed on product specification sheets. EXAMPLES: STOP APPLICATION Function: To stop a lathe spindle. Type: A brake will provide either a rapid or cushioned stop. Size: The motor horsepower is 2 and the speed at the brake location is 1100 rpm. On the brake chart opposite follow across the 2 HP line to the 1100 rpm column. A size 500 brake will handle this...