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Chapter 3.0: Application
3.1: The brake covered by this manual is type MST/E. This brake has an adjustable external torque
spring and is generally applied on installations where the required torque cannot be pre-
determined within well defined limits.
3.2: For a given wheel diameter the Association of Iron and Steel Engineers (AISE) determines the
prescribed torque, when applied to 30 and 60 minute rated motors in steel mill applications.
3.3: When applied to four quadrant drives or other applications where wheel heating can be
accurately predicted, type MST/E brakes can be provided with torque values in excess of the
AISE recommendations.
3.4: When the load cycle requires a larger than normal wheel size, as is frequently the case on crane
bridge drive, MST/E brakes can be provided with torques lower than AISE for a given wheel size.
3.5: For applications where larger than normal running clearance is required, a larger actuator can be
applied to a given brake. Typical would be severe applications where wheel expansion can be
considerable or where excessive wheel run-out can be expected.
8/17/2006 Page 10 of 33 MST/E Electric Shoe Brakes Manual
560022-R6