Zenar-Manufactured Brakes

Shown below are our standard disc (DB) and shoe brakes (ESB).  Parts for these brakes are stocked and complete assemblies can be put together and shipped quickly to suit your needs.  Give us a call if you have any questions and for pricing.

Brake Model Torque Rating
DB0 up to 5 ft-lbs
DB1 up to 10 ft-lbs
DB2 up to 25.2 ft-lbs
DB3 up to 50.5 ft-lbs
DB4 up to 53 ft-lbs
DB5 up to 106 ft-lbs
DB6 and up Call Us!
ESB8 up to 100 ft-lbs
ESB10 up to 200 ft-lbs
ESB13 up to 550 ft-lbs
ESB16 up to 1,000 ft-lbs
ESB19 up to 2,000 ft-lbs

TYPE ‘DB’ MAGNET OPERATED
D.C. BRAKES
FOR OVERHEAD TRAVELING CRANES



  • Simple mechanical design for safe dependable operation.
  • Fully enclosed and protected against unfavorable weather conditions and detrimental operating environments.
  • DC actuated; solid state AC rectifier available for AC application.
  • Short stroke and fast action without hammering or vibration for long brake life.
  • Beefed up braking faces for cooler operation and prolonged lining life.
  • Epoxy potted and encapsulated magnet coil with copper magnet wire, Class F insulation, 75 degree “C” rated at 40 degree “C” ambient.
  • Mechanical cooling not needed even in high duty cycle applications.
  • Adjustable torque feature available for bridge and trolley drives.
  • Improved inspection cover design for easy removal and access to all parts.

Technical Data / Instruction Information

Models File Download
DB0 / DB2 / DB4 CMDBII-01 05-08
DB1 / DB3 / DB5 / DB6/ DB7 CMDBII-02 05-08
DB8 CMDBII-03 05-08
DB9 CMDBII-04 05-08



Proven to be the most effective, trouble-free design available, “Type DB” AC rectified DC motor brakes are ideal for overhead cranes on hoist, bridge, and trolley drives. The direct acting positive braking features mean remarkable performance, unmatched simplicity and durability. The DB disc brakes’ highly rapid setting time results in fast, positive stops at the very moment when power is removed. Upon power restoration, a fleeting delay in brake release causes the motor to drive momentarily through a partly released brake. This more deliberate acceleration sets up softer, smoother starts that improve inching and spotting effectiveness.

brake_DB_dimensionsA low braking pressure reduces thermal wear, enhances lining life, and excludes any need for mechanical cooling. Reduced armature stroke, simple mechanical structure, and a stationary electromagnet eliminate the hammering action and vibration that often shorten brake life. The DB’s exceptional design requires the least possible maintenance and makes the brake virtually self-adjusting.

Two AC to DC rectifiers are available for the “DB” series brakes. One, normally used on traverse drives, provides 100% power to the magnet coil. The other controller, a forced voltage type, provides 250% power to the magnet coil to initiate the brake release. Upon brake release, the power reduces to 25%. The forced voltage controller provides a faster release and setting time for the brake.


TYPE “ESB” (AISE – NEMA) MAGNET OPERATED
D.C. SHOE BRAKES
FOR OVERHEAD TRAVELING CRANES


  • The best choice for normal, heavy, and severe duty crane service.
  • Spring set and electrically released.
  • Standard 8″, 10″, 13″, and 16″ sizes.
  • DC actuated; solid state AC rectifier provided for AC crane application.
  • Adjustable brake torque to a minimum 25% of rated torque.
  • Epoxy potted encapsulated magnet coil with copper magnet wire, Class “F” insulation rated 75 “C” at 40 degree “C” ambient.
  • Automatic brake shoe centering and alignment to the brake wheel.
  • Bonded non-asbestos linings for long shoe life.
  • Simple shoe replacement, removable from either brake side.
  • Program available for relining used brake shoes at the factory.
  • Pivot pins all steel, hardened and interchangeable for each brake size.
  • Conveniently positioned adjustment points located on top of brake.
  • Top-hinged armature design to prevent accumulating foreign matter.
  • Ductile iron brake wheels available semi finished (maximum offset and rough bored) as standard, or finished machined as special.

Technical Data / Instruction Information

Models File Download
ESB8 / ESB10 / ESB13
ESB16 / ESB19
CMESB 01-04

Type “ESB” D.C. electric shoe brakes are highly regarded as the safest, most effective brake concept for normal, heavy, and severe duty crane service. The direct acting positive braking features mean remarkable performance, unmatched simplicity, and durability. An exceptionally rapid setting time results in fast, certain stops at the instant power is removed.

brake_ESB_dimensionsThe “ESB” brake’s ultra smooth operation is a direct result of a reduced armature stroke (air gap), simple mechanical structure, and a stationary magnetic brake coil. Eliminated are the hammering action and vibration that often shorten brake life. This exceptional design achieves maximum effectiveness while requiring a minimum of maintenance.

A forced voltage AC to DC rectifier provides 250% power to the magnet coil to initiate the brake release. Upon brake release, the power reduces to 25%. This forced voltage design provides quicker release and setting times for the brake.