Frequently Asked Questions
Expert Insights and Reliable Solutions to Your Most Common Questions.
- Four-Point Contact Single Row Ball
- Crossed Roller
- Double Row Ball
- Double Row
- Eccentric Ball
- Three-Row Roller
Single Row Ball, Crossed Roller, and Three-Row Roller Slewing Bearings
- Ball Bearings: Suitable for high-speed applications
- Roller Bearings: Suitable for heavy load, low-speed applications
- Crossed Rollers: Suitable for high-precision rotation
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Or contact our engineer for table selection guidance
- Slewing Bearings: C45N, 50Mn, C48, 42CrMo, etc.
- Small Gears: 40Cr, 18CrMnTi, 20CrMnTi, 29CrMnTi, 17CrNiMo6, etc.
- Other Products: Customized according to client requirements
Slewing bearings: 10 mm – 10,000 mm
20 – 80 RPM
Exceeding recommended speed may cause reduced service life, overheating, or premature wear
1. Use high-strength, wear-resistant materials (e.g., 42CrMo4)
2. Ensure precise installation with flat mounting surface and correct preloading
3. Regular lubrication
4. Avoid overloading
5. Reduce operating time and speed
6. Apply gear hardening where applicable
Ensure that the slewing bearing soft strap positions are avoided within the swing range of the boom
Warranty: 1 year from the date of delivery
Spare parts replacement: Lifetime free for customers
In-stock items: Within 3 days
Standard products: 1–2 weeks
Custom products: Depends on size and precision, typically no more than 40 days
Urgent orders: Fast-track production is available
By sea, by air, DHL, TNT, FedEx, etc.
Yes, OEM services are available
1 piece
- Insufficient or degraded lubricant
- Track wear or pitting
- Rolling element damage
- Foreign metallic particles entering the raceway
- Uneven mounting surface or unevenly tightened bolts
- Gear machining accuracy issues
Four-layer protection:
1. Apply anti-rust oil
2. Wrap in thin PC plastic film
3. Cover with thick plastic sheet
4. Pack in moisture-proof wooden box
Additional custom solutions for many European and American clients:
- Strong Anti-rust Oil
- Black Oxide Treatment
- Jet Black (pure black paint finish)
- Hot Dip
- Galvanizing (CGL)
- Electrogalvanizing (EGL)
- Hot Dip Galvanizing + Paint Finish
Serving 1,000+ customers worldwide
SKF / IMO / ISB / TGB / ROTHE ERDE