Topic
overhead or gantry crane
Articles filed under this topic.
How can I prevent brake overheating and brake fade on overhead and gantry cranes?
Brake fade happens when heat reduces the effective friction coefficient, leading to longer stopping distances or reduced holding capability. To …
Read moreWhy is my overhead crane brake squealing, and how can I reduce noise?
Brake squeal is usually friction-induced vibration. On crane brakes, it often occurs when linings are glazed from heat, contaminated, or made from a …
Read moreWhat causes uneven braking, vibration, or “judder” on crane brakes?
Uneven braking or judder on overhead and gantry cranes is typically caused by inconsistent friction contact or mechanical looseness. Common causes …
Read moreWhat faults can unstable brake coil voltage cause on overhead/gantry cranes?
Unstable voltage at the brake coil can create a cascade of issues. If voltage dips, an electromagnetic brake may not fully release, causing dragging, …
Read moreWhat happens if the brake power supply/rectifier (e.g., DKZ) is selected incorrectly?
Selecting the wrong brake power supply box or rectifier can cause serious reliability and safety problems on cranes. If the DC output voltage does not …
Read moreWhy does a DC electromagnetic brake have weak holding or “weak pull-in” on a crane?
A DC electromagnetic brake that pulls in weakly usually points to an electrical supply or air-gap issue. On overhead crane and gantry crane motor …
Read moreHow does electro-hydraulic thruster oil leakage or low oil level affect crane brake performance?
On overhead and gantry cranes, electro-hydraulic thrusters are often used to release drum (block) brakes against spring force. If the thruster leaks …
Read moreWhat risks occur if an electro-hydraulic thruster stroke is insufficient?
Insufficient thruster stroke means the brake may not fully release, partially release, or fail to achieve the intended clearance. The most immediate …
Read moreIf the brake releases slowly, is it an actuator problem or mechanical binding?
It can be either, and the fastest way to diagnose is to separate “power delivery” from “mechanical movement.” First, verify the actuator’s input: …
Read moreWhat are symptoms of a brake not fully releasing (dragging) on cranes?
A dragging brake creates continuous friction during motion, causing heat and rapid wear. Typical symptoms include unusually hot brake housings or …
Read moreWhat are common causes of load slipping (“creep”) after the hoist brake applies?
Load slipping after brake application indicates insufficient holding torque or unstable friction. Common causes include worn or glazed linings, …
Read moreHow should “zero-speed brake set” be configured on a VFD hoist to prevent load drift?
To prevent load drift (creep) on a VFD-controlled hoist, the brake must set only when the motor is truly producing zero speed and sufficient holding …
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