Why Choosing the Correct Brake Torque Matters More Than You Think

It's all too easy to overlook the vital component doing the real work when a crane slows to a stop. Every hold, every halt is controlled by the electromagnetic brake, and selecting a balance of brake torque means much more than many appreciate.

Here at CY Electrical & Cranes Co Ltd, we've seen more cases of a misjudged torque, with the impact all the same: inconsistent stopping, faster wear-and-tear, and unnecessary pressure on the system.

Understanding what brake torque actually does

Brake torque determines how effectively the crane stops and holds a load. If the torque is too low, the brake struggles to manage the stopping force. If it's too high, the system absorbs unnecessary shock each time the crane slows. When the torque is set correctly, you get smoother operation, reliable load control, and a longer service life for the brake and surrounding parts.

Torque isn't something to approximate; it has to be calculated carefully based on capacity, speed, duty rating, motor power, and the working environment in which the crane works. That's why we encourage clients to involve us early in reviewing their braking system or planning a replacement.

The problems we see when the torque is incorrect

We're often called out to investigate issues like creeping loads, overheating motors, or brakes that seem to "grab" too aggressively. More often than not, incorrect torque is responsible. Undersized torque causes slipping, inconsistent stopping distances and reduced holding force. Oversized torque increases mechanical shock, accelerates wear across the drivetrain and shortens the lifespan of discs, pads and springs.

The problems usually do not strike immediately. More often, they build with time, most frequently causing an increase in the amount of downtime and overall repair cost.

Getting torque right on older or modified cranes

Older cranes often go through changes over the years, from motor upgrades to speed adjustments. If the brake torque wasn't reviewed after those updates, the system may no longer be matched correctly. We often assist customers in re-evaluating torque requirements or provide a state-of-the-art electromagnetic brake that matches their current setup and duty cycle.

Even a simple torque correction can make a big difference in stopping performance and reliability without requiring significant crane modifications.

Need assistance in selecting the proper brake?

If you're not sure whether your current brake torque is right for your crane's application, we can help. At CY Electrical & Cranes Co Ltd, we assess, supply and install braking systems designed for long-term performance and safety.

Contact our team today to review your braking setup, request replacement parts, or schedule an on-site inspection.