Caliper Disc Brake Balanced Design CDB3034D-BAL


PT Tech’s new CDB3034D-BAL replaces 30″ drum brakes and conforms to the new AIST brake standard.The dual acting calipers minimize shaft bending that occurs with single acting calipers. They are typically used on extended gearbox shafting or motors that are not built to mill duty standards.

If the installation conforms to AIST’s dimensional standard for DC mill motors, then when ordering all that is required is the DC mill motor number and existing electrical coil specifications. In all other installations, please provide a drawing of the existing brake drum. 34″ inch disc replaces an 30″ drum.

PT Tech supports its commitment to excellent field service with a large inventory of parts and a 24-hour emergency service. When Converting The CDBA directly replaces an 30″ drum brake. It has the same mounting footprint and torque capacity as an 30″ drum brake. When converting, it is critical that the disc’s centerline is in the same position as the drum’s centerline. Single-acting caliper disc brakes impose a bending moment. Shafting should be reviewed prior to installation. Consult PT Tech. In most cases, PT Tech can suggest mounting adaptations for non-standard drum brakes.

The PT Tech CDB-D Caliper Disc Brakes are designed to upgrade AISE and CMAA cranes to the higher performance and the ease of maintenance of a caliper disc brake. Upgrading to the PT Tech Caliper Disc Brake will result in the following advantages:

  • Wear adjustment is far easier.

  • Less frequent need for wear adjustments.

  • Improved wear life.

  • Replacing friction pucks is substantially quicker.

  • A set of friction pucks weighs only 4½ pounds.

  • Eliminates drag and slip problems due to drum thermal expansion.

  • Significantly better resistance to heat checking

Technical Specs

Max. Torque – Series Wound 1/2 h 6,000 lb·ft
Max. Torque – Series Wound 1h 3,900 lb-ft
Max. Torque – Shunt Wound 1/2 h 6,000 lb-ft
Max. Torque – Shunt Wound 1h 4,500 lb-ft
Drum Brake Replaced 30 in
Disc Diameter 34 in