Why Gear Hardening Matters for Slewing Bearings?

When selecting a slewing bearing, many customers focus mainly on dimensions and load capacity.

But one important detail is often overlooked:

👉 Gear hardening.

For slewing bearings with external or internal gears, proper hardening treatment can significantly affect service life and reliability.

So why is it important?

🔹 Improved Wear Resistance

Hardened gear teeth can better resist wear during continuous meshing operation.

🔹 Better Load Capacity

Heat-treated gears generally perform better under heavy or shock loads.

🔹 Longer Service Life

Proper hardening helps reduce premature tooth damage and extends operating life.

🔹 More Stable Performance

Especially in demanding applications such as:

• Cranes
• Excavators
• Rotary platforms
• Heavy industrial equipment

However, not every application requires fully hardened gears.

For lighter-duty or cost-sensitive projects, non-hardened gears may also be a practical option.

The key is choosing the right configuration based on actual working conditions.

Recently, more customers are asking not only about bearing dimensions, but also about gear treatment and long-term durability.

In many cases, the difference is not just price — it’s reliability over time.