FDON double row ball slewing bearings and three row roller slewing ring bearings are engineered for heavy-duty applications in construction and industrial machinery. The double row ball bearings feature precision-machined steel rings and high-strength balls, offering superior axial and radial load capacity for rotating tables, turntables, and platforms. Three row roller slewing bearings integrate three rows of rollers, efficiently supporting combined radial, axial, and tilting moment loads in demanding environments. Both bearing types are designed for excavators, cranes, concrete pumps, aerial work platforms, and other engineering machinery, ensuring smooth rotation, high durability, and low maintenance.
FDON’s double row ball and three row roller slewing bearings provide reliable performance for heavy construction and industrial machinery. Engineers use these bearings in excavators, cranes, concrete pumps, and aerial work platforms. They ensure smooth rotation while supporting high loads.
The double row ball slewing bearings use two rows of high-strength balls on precision-machined raceways. This design handles both axial and radial loads efficiently. It also delivers stable rotation for turntables, platforms, and rotating tables. The three row roller bearings feature three rows of rollers. They distribute radial, axial, and tilting moment loads evenly. As a result, these bearings excel in the most demanding applications.
FDON constructs each bearing from hardened, high-quality steel. Engineers apply advanced heat treatment to improve wear resistance. The bearings also include seals that prevent dust, dirt, and moisture from entering. These features reduce maintenance needs and extend service life. Moreover, FDON provides multiple sizes and specifications. This flexibility fits a wide range of machinery, from small excavators to large cranes.
Customers rely on FDON because of its commitment to quality and precision. Each bearing undergoes strict testing to ensure performance under dynamic and heavy loads. Therefore, operators experience smooth rotation, higher efficiency, and less downtime. In addition, the robust design and precise engineering guarantee long-term durability.
FDON slewing bearings combine reliability and safety. For example, on cranes and concrete pumps, these bearings maintain stability during operation. They also improve machine productivity by handling extreme loads without failure. In short, choosing FDON bearings ensures your machinery runs efficiently. Operators benefit from reduced maintenance, better safety, and enhanced performance.
To summarize, FDON double row ball and three row roller slewing bearings offer top performance in engineering machinery. They support heavy loads, rotate smoothly, and last longer. With FDON, manufacturers and operators gain high-quality bearings that optimize operational efficiency, stability, and safety.
Before you place an order, check whether a triple-row roller slewing bearing actually matches your equipment’s duty conditions — faster than reading any spec sheet.
If your equipment needs to “rotate and carry heavy loads at the same time,” a triple-row roller slewing bearing is usually the most direct, integrated solution.
Tower crane slewing platforms, crawler crane turntables, excavator upper structures, TBM cutterhead drives, wind turbine yaw/pitch systems, stacker-reclaimer slewing bodies.
We’d rather help you find the right solution than sell you the wrong one. Here’s when a slewing bearing may not be the best fit.
Send us your equipment’s duty conditions (load / speed / space / environment) and our engineers will tell you within 24 hours whether it fits — not just try to sell you something.
Free Duty Assessment →You don’t need a finished drawing to get started — tell us what you already know, and our engineers will help fill in the rest.
| Category | Data Needed | Why It Matters |
|---|---|---|
| Load Parameters | Axial load, radial load, tilting moment | Determines the number of rows and raceway design |
| Envelope Dimensions | Installation OD / ID, installation height, bolt hole pattern | Determines whether a standard size fits or custom sizing is needed |
| Speed & Duty | Operating speed (rpm), continuous or intermittent duty, environment | Affects lubrication method and seal grade |
| Drive Type | Internal-tooth / external-tooth / no gear (bearing only) | Determines gear module, tooth count and precision grade |
| Precision | Rotational accuracy, clearance range (negative clearance required?) | Affects manufacturing process and inspection standard |
| Drawing / Reference Part | Existing drawing, old bearing model, or competitor part number | Allows a direct 1:1 match or replication — the fastest path to selection |
No drawing on hand? That’s fine — send us the parameters you know, or a photo of your old bearing’s nameplate.
Send Data Now →Every batch ships with a material certificate, hardness test report and NDT report — third-party re-inspection is welcome.
Determines overall strength and fatigue life. Heavy-duty applications use alloy structural steel with quenching & tempering.
Medium-frequency induction hardening gives more uniform hardness than through-hardening, avoiding soft spots.
Heavy-duty, low-speed equipment usually uses negative clearance for higher stiffness; precision equipment can go tighter.
Frequent start/stop or heavy-duty drive applications benefit from hardened tooth flanks for longer life.
Don’t see your industry? Applications go far beyond the examples below — tell us what your equipment does.
More project photos, inspection reports and customer references are available on request — happy to sign an NDA if needed.
Filter 463 catalog specifications by dimension. Results update instantly — no page reload, no server round-trip.
| Model | Structure | Geared Type | OD (mm) | ID (mm) | Height | Module | Teeth | Weight (kg) |
|---|
Expert Insights and Reliable Solutions to Your Most Common Questions.
FDON GROUP supplies a full range of slewing bearings to meet different industrial needs:
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:
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.
FDON MANUFACTURING CO., LTD
Leading Slew Drive & Slewing Bearing Manufacturer in China.
FDON products are applied globally in solar tracking systems, wind power systems, satellite communications, and numerous other globally connected industries.
© 2026 FDON MANUFACTURING CO.,LTD All Rights Reserved

