We have been cooperating for over three years, and they are always our first choice for purchasing slewing rings. Not only is the product precision high, but their after-sales service is impeccable. They always provide remote guidance to solve technical issues immediately. A truly professional partner!
Ivan Petrov
Procurement Director
Efficient communication throughout the entire process, from inquiry to installation! The slewing ring selection plan they provided saved us 15% in maintenance costs. Their professionalism far exceeds that of other suppliers. I have already recommended them to our partners.
Anna Kovalenko
Chief Engineer
We tested two sets of slewing rings; they run smoothly and quietly. Their technical team even customized a lubrication plan based on our specific working conditions. Such attention to detail is rare in the industry!
Maxim Sergeev
Project Manager
The precision slewing rings we procured for medical device manufacturing have extremely high tolerance requirements. They not only met the standards but also proactively offered a 2-year warranty—this is a true reflection of their confidence! Because all suppliers dare 1 year only.
Elena Ivanova
CEO
Rothe Erde kd900 slewing bearing replacement
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Rothe Erde kd800 slewing bearing replacement
<!doctype html> FDON · Rothe Erde RD 800 Replacement Hub Rothe Erde RD 800 Slewing Bearing Replacement
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Frequently Asked Questions
Expert Insights and Reliable Solutions to Your Most Common Questions.
FDON GROUP supplies a full range of slewing bearings to meet different industrial needs:
- Single row four point contact slewing bearings Application: medium loads, precise rotation.
- Double row ball bearings Application: higher radial and axial loads.
- Cross roller bearings –Application: high rigidity, suitable for robots and machining centers.
- Three row roller bearings – Application: extreme loads in heavy equipment.
- Ball combine roller bearings –Application: precise rotational adjustment applications.
- Customized bearings – tailored for specific equipment requirements.
Typical selection parameter for FDON clients:
Load type: axial, radial, and tilting moment.
Rotation RPM: ensures long service life.
Installation space & mounting dimensions: inner/outer ring diameter, bolt circle.
Precision & rigidity requirements: critical for cranes, excavators, and robots.
FDON engineers provide professional selection guidance according to your equipment and drawings.
FDON GROUP selects materials for strength, wear resistance, and long-term durability:
Slewing ring: 42CrMo, 50Mn, C45N, 40CrNiMo, C48E.
Special forging spare parts: carburized/hardened steels for gear teeth (20CrMnTi, 18CrNiMo7‑6).
Corrosion resistant: SS 304, 316L, duplex stainless steel.
Surface treatments: heat treatment, quenching, carburizing, induction hardening, and surface coating(Four-Layer Packing, Strong Anti-Rust Oil, Black Oxide Treatment, Jet Black Paint Finish, Hot-Dip Galvanizing (CGL), Electro-Galvanizing (EGL), Hot-Dip Galvanizing + Paint Finish)
Correct installation with flat surfaces.
Proper lubrication using grease.
Avoid overloading or shock loads over capacity.
Monitor operating conditions regularly to prevent debris entry.
Typical factors observed by FDON engineers:
- Insufficient or incorrect lubrication.
- (dust, metal particles) in raceways.
- Rolling element or track damage.
- Uneven mounting surfaces or misalignment.
- Incorrect bolt torque(below grade 8.8) or preloading.
In-stock: 3–7 days.
Custom: 2–6 weeks depending on size, load, and precision.
Warranty: 1 year
Lifetime Free Spare Parts: Glue, seals, steel ball
Yes — FDON GROUP offers:
Detailed installation manuals.
Online engineering support.
Guidance for lubrication, maintenance, and troubleshooting solution.
Full range of materials and heat treatments for various load conditions.
High precision and strict quality inspection standards.
Engineering support before and after delivery.
Customization to exact equipment requirements.
Proven performance in cranes, excavators, robotics, wind turbines, and heavy machinery etc.