Gearbox Running Hot? Don’t Just Blame the Lubricant.
A customer once asked us: “The gearbox temperature keeps rising during operation, and even changing to new oil didn’t help. What’s going on?” Today, let’s talk about gearbox overheating.
First, what counts as “too hot”?
Under normal operating conditions, gearbox bearing temperatures typically range between 50–70°C. In summer, if bearing temperatures consistently exceed 85°C, or in winter, consistently exceed 75°C, it indicates abnormal overheating that requires investigation.