Views: 0 Author: Site Editor Publish Time: 2026-04-16 Origin: Site
Selecting the right slewing bearing is critical for ensuring the performance, safety, and service life of your machinery. Whether used in excavators, cranes, wind turbines, or industrial automation systems, a properly selected slewing ring bearing can significantly reduce maintenance costs and improve operational efficiency.
As a professional slewing bearing manufacturer in China, Aoxuan provides customized solutions for different industries worldwide.
A slewing bearing (also called slewing ring bearing or turntable bearing) is a large-diameter rolling-element bearing that supports:
Axial loads
Radial loads
Tilting (moment) loads
It allows rotational movement between two structures while supporting heavy loads.
The first step is to understand the load conditions:
Axial load (vertical force)
Radial load (horizontal force)
Tilting moment (overturning force)
Heavy-duty equipment like cranes requires high moment capacity bearings.
Different applications require different speeds:
Low-speed heavy load → construction machinery
Medium-speed → industrial equipment
Continuous rotation → special designs required
Higher speed usually requires better heat treatment and precision machining.
Common slewing bearing structures include:
Single-row ball slewing bearing
Most common
Suitable for medium load
Double-row ball slewing bearing
Higher load capacity
Used in heavy machinery
Cross roller slewing bearing
High precision
Used in robotics and radar systems
Slewing bearings can be designed with:
Internal gear
External gear
Without gear
Gear selection depends on driving system design.
You must consider:
Outer diameter
Inner diameter
Bolt hole pattern
Improper sizing may lead to installation failure or uneven load distribution.
Environmental factors affect performance:
High temperature → special heat treatment
Dusty environment → enhanced sealing
Marine use → anti-corrosion treatment
Slewing bearings are widely used in:
Excavators
Tower cranes
Truck-mounted cranes
Wind turbines (yaw & pitch systems)
Medical and radar systems
Industrial turntables
For basic selection, engineers usually consider:
Total axial force (Fa)
Radial force (Fr)
Overturning moment (M)
Correct calculation ensures longer bearing life and safer operation.
Many buyers make these mistakes:
❌ Only focusing on diameter
❌ Ignoring moment load
❌ Choosing wrong gear type
❌ Not considering lubrication system
❌ Ignoring installation alignment
As a professional manufacturer, Aoxuan offers:
✔ OEM / ODM customization
✔ Full size range production
✔ High-strength alloy steel (42CrMo, 50Mn)
✔ Precision machining & heat treatment
✔ Export experience worldwide
We support industries like construction machinery, mining equipment, and renewable energy.
You need to provide load data, application type, and installation dimensions.
Yes, Aoxuan provides full OEM customization including gear type and structure.
It depends on load conditions, usually 5–15 years under proper maintenance.
Common materials include 42CrMo and 50Mn alloy steel.
Yes, we confirm technical drawings before manufacturing.
If you are looking for a reliable slewing bearing supplier, Aoxuan provides professional engineering support and fast quotation service.
Send us your drawing or technical requirements today
We will recommend the most suitable slewing bearing solution for your application
