Product Details

External Gear Small Three Rows Of Roller Slewing Bearing Manufacturers

Internal Gear Slewing Bearing Manufacturer

Slewing Bearing Sample Internal Gear Slewing Bearings

A slewing ring turntable bearing provides reliable rotation and exceptional load support in a wide range of industries. Known for its compact structure and high performance, it enables smooth 360° movement while handling heavy axial, radial, and moment loads.

Engineered from hardened alloy steel with precision-ground raceways, these bearings ensure durability and long-lasting performance. In addition, advanced sealing systems protect against dust, moisture, and harsh operating environments. Therefore, they maintain excellent efficiency even under demanding conditions.

Specification

Slewing ring turntable bearings are essential components designed to support heavy loads while enabling precise rotation. As industries demand compact yet powerful solutions, these bearings have become vital in applications ranging from automation to construction. Their ability to combine load capacity and rotational accuracy makes them indispensable in modern machinery.

Structural Design and Load Capacity

Slewing ring turntable bearings typically use a four-point contact ball or cross roller design. The four-point contact structure ensures smooth motion with high axial and radial capacity, while the cross roller type enhances rigidity and precision. Consequently, engineers can choose the structure that best matches their performance requirements.

NO.	De	D	d	H	b	m	z	x	k	Normalizing	Q&T	KG
131.25.500	664	634	366	148	80	5	130	0.5	0.1	50	67	211
132.25.500	664.8	634	366	148	80	6	108	0.5	0.1	60	80	210
131.25.560	724	694	426	148	80	5	142	0.5	0.1	50	67	236
132.25.560	724.8	694	426	148	80	6	118	0.5	0.1	60	80	235
131.25.630	808.8	764	496	148	80	6	132	0.5	0.1	60	80	275
132.25.630	806.4	764	496	148	80	8	98	0.5	0.1	80	110	270
131.25.710	886.8	844	576	148	80	6	145	0.5	0.1	60	80	310
132.25.710	886.4	844	576	148	80	8	108	0.5	0.1	80	110	306
131.32.800	1006.4	964	636	182	120	8	123	0.5	0.1	121	167	515
132.32.800	1008	964	636	182	120	10	98	0.5	0.1	151	209	512
131.32.900	1102.4	1064	736	182	120	8	135	0.5	0.1	121	167	577
132.32.900	1108	1064	736	182	120	10	108	0.5	0.1	151	209	591
131.32.1000	1218	1164	836	182	120	10	119	0.5	0.1	151	209	662
132.32.1000	1221.5	1164	836	182	120	12	99	0.5	0.1	181	251	662
131.32.1120	1338	1284	956	182	120	10	131	0.5	0.1	151	209	746
132.32.1120	1341.6	1284	956	182	120	12	109	0.5	0.1	181	251	746
131.40.1250	1509.6	1445	1055	220	150	12	123	0.5	0.1	229	314	1194
132.40.1250	1509.2	1445	1055	220	150	14	105	0.5	0.1	263	366	1183
131.40.1400	1665.6	1595	1205	220	150	12	136	0.5	0.1	229	314	1364
132.40.1400	1663.2	1595	1205	220	150	14	116	0.5	0.1	263	366	1345
131.40.1600	1873.2	1795	1405	220	150	14	131	0.5	0.1	263	366	1577
132.40.1600	1868.8	1795	1405	220	150	16	114	0.5	0.1	302	417	1545
131.40.1800	2069.1	1995	1605	220	150	14	145	0.5	0.1	263	366	1766
132.40.1800	2076.8	1995	1605	220	150	16	127	0.5	0.1	302	417	1782
131.20.2000	2236.8		1853	132	106	16	137	0.5	0.1		311	958
131.25.2000	2268.8		1819	147	117	16	139	0.5	0.1		326	1277
131.45.2000	2300.8	2221	1779	231	160	16	141	0.5	0.1	322	445	2254
132.45.2000	2300.4	2221	1779	231	160	18	125	0.5	0.1	362	501	2235
131.25.2240	2516.4		2059	147	117	18	137	0.5	0.1		366	1447
131.32.2240	2552.4		2022	181	139	18	139	0.5	0.1		435	2074
131.45.2240	2556.8	2461	2019	231	160	16	157	0.5	0.1	322	445	2626
132.45.2240	2552.4	2461	2019	231	160	18	139	0.5	0.1	362	501	2584
131.25.2500	2786.4		2319	147	117	18	152	0.5	0.1		366	1645
131.32.2500	2822.4		2282	181	139	18	154	0.5	0.1		435	2373
131.45.2500	2822.4	2721	2279	231	160	18	154	0.5	0.1	362	501	2925
132.45.2500	2816	2721	2279	231		20	138	0.5	0.1	402	556	2867
131.25.2800	3096		2619	147	117	20	152	0.5	0.1	203	407	1874
131.32.2800	3136		2582	181	139	20	154	0.5	0.1		483	2705
131.40.2800	3136		2562	220	170	20	154	0.5	0.1		591	3430
131.45.2800	3110.4	3021	2579	231	160	18	170	0.5	0.1	362	501	3221
132.45.2800	3116	3021	2579	231	160	20	153	0.5	0.1	402	556	3233
131.32.3150	3476		2932	181	139	20	171	0.5	0.1		483	2969
131.40.3150	3515.6		2912	220	170	22	157	0.5	0.1		650	4003
131.50.3150	3536	3432	2868	270	180	20	174	0.5	0.1	452	626	5276
132.50.3150	3537.6	3432	2868	270	180	22	158	0.5	0.1	498	689	5260
131.32.3550	3889.6		3332	181	139	22	174	0.5	0.1		532	3411
131.40.3550	3911.6		3312	220	170	22	175	0.5	0.1		650	4468
131.50.3550	3936	3832	3268	270	180	20	194	0.5	0.1	452	626	5998
132.50.3550	3933.6	3832	3268	270	180	22	176	0.5	0.1	498	689	5944
131.32.4000	4351.6		3782	181	139	22	195	0.5	0.1		531	3940
131.40.4000	4363.2		3762	220	170	24	179	0.5	0.1		710	5045
131.50.4000	4395.6	4282	3718	270	180	22	197	0.5	0.1	498	689	6833
132.50.4000	4395	4282	3718	270	180	25	173	0.5	0.1	565	783	6772
131.40.4500	4867.2		4262	220	170	24	200	0.5	0.1		710	5681
131.50.4500	4901.6	4782	4218	270	180	22	220	0.5	0.1	498	689	7809
132.50.4500	4895	4782	4218	270	180	25	193	0.5	0.1	565	783	7674

Materials and Durability

Manufactured from high-grade alloy steel, each bearing undergoes heat treatment and precision machining to achieve optimal strength. In addition, specialized seals protect the internal raceways from dust, dirt, and moisture. Therefore, slewing ring turntable bearings deliver long service life and stable performance in harsh conditions.

Applications Across Industries

Turntable slewing bearings serve diverse sectors. In robotics, they enable accurate joint movement and repeatable positioning. In automation and material handling, they provide smooth rotation for conveyors and assembly systems. Furthermore, in construction equipment, they support rotating platforms and lifting devices. This versatility highlights their value across multiple industries.

Performance Advantages

High precision for smooth, accurate motion
Compact structure with excellent load capacity
Long service life with minimal maintenance
Protection against harsh environmental conditions
Flexible design for robotics, automation, and heavy equipment

Why Choose Slewing Ring Turntable Bearings

Industries seek efficiency, safety, and reduced downtime. By selecting slewing ring turntable bearings, operators ensure reliability in critical applications. In addition, their strong load-handling ability supports productivity in manufacturing, logistics, and construction projects. For further engineering data, refer to Engineering Toolbox resources.

Conclusion

In conclusion, slewing ring turntable bearings combine strength, precision, and durability. They deliver smooth rotation and high performance across robotics, material handling, and construction. Consequently, they remain a trusted solution for industries requiring reliable rotational systems.

When To Choose This Structure — Slewing Bearing

Sheet 01 · Selection Guide

When Should I Choose This Structure?

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.

Your equipment needs continuous 360° rotation under high torque, heavy-load conditions — e.g. cranes, excavators, tunnel boring machines, wind turbine yaw systems.
Installation space is limited, and axial load, radial load and tilting moment must be carried by a single bearing rather than a separate bearing-plus-gearbox assembly.
The equipment needs a built-in slewing drive gear (internal or external), eliminating extra transmission components and simplifying assembly.
The operating environment involves dust, moisture, or large temperature swings, requiring a bearing with built-in sealing and lubrication channels.
The project has clear requirements for rotational accuracy and adjustable clearance — e.g. medical equipment, solar tracking mounts, precision turntables.

One-line summary

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.

Typical equipment

Tower crane slewing platforms, crawler crane turntables, excavator upper structures, TBM cutterhead drives, wind turbine yaw/pitch systems, stacker-reclaimer slewing bodies.

When NOT To Choose It — Slewing Bearing

Sheet 02 · When Not To Use

When Should I NOT Choose It?

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.

If your rotational speed requirement exceeds the typical design range for slewing bearings (e.g. high-speed rotating platforms), a cross roller bearing or dedicated high-speed structure is usually a better fit.
If overall weight is extremely sensitive for the machine (e.g. drone gimbals, small precision instruments), a thin-section or angular-contact bearing combination may be lighter and more suitable.
If budget and production volume favor a standard bearing plus external gear assembly, that may be more cost-effective for non-heavy-duty, non-harsh-environment applications.
If installation space is extremely constrained and cannot meet the minimum installation diameter, confirm with our engineers whether a compact custom design is available.

Not sure which case applies to you?

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 →

Required Data For Selection — Slewing Bearing

Sheet 03 · Selection Data

Required Data For Selection

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 →

Materials, Hardness, Clearance & Gear — Slewing Bearing

Sheet 05 · Material & Process

Materials / Hardness / Clearance / Gear Treatment

Every batch ships with a material certificate, hardness test report and NDT report — third-party re-inspection is welcome.

01 · MATERIAL

Ring Material

42CrMo / 50Mn (specifiable)

Determines overall strength and fatigue life. Heavy-duty applications use alloy structural steel with quenching & tempering.

02 · HARDNESS

Raceway Hardness

HRC 55–62, depth customizable

Medium-frequency induction hardening gives more uniform hardness than through-hardening, avoiding soft spots.

03 · CLEARANCE

Clearance Grade

Standard or negative, P0–P6

Heavy-duty, low-speed equipment usually uses negative clearance for higher stiffness; precision equipment can go tighter.

04 · GEAR

Gear Treatment

Q&T or induction-hardened teeth

Frequent start/stop or heavy-duty drive applications benefit from hardened tooth flanks for longer life.

Related Applications — Slewing Bearing

Sheet 06 · Applications

Related Applications

Don’t see your industry? Applications go far beyond the examples below — tell us what your equipment does.

Cranes

Excavators & Construction

Wind Turbines

Solar Tracking

Port Machinery

Rotary Platforms

Real Project Case — Slewing Bearing

Sheet 07 · Project Reference

Real Project Case

More project photos, inspection reports and customer references are available on request — happy to sign an NDA if needed.

Custom triple-row roller slewing bearing manufactured for a stacker-reclaimer, Southeast Asia port project

Case File · Port Machinery

Stacker-Reclaimer Slewing Bearing — Custom Project, SE Asia

Background: The customer was using an imported triple-row roller slewing bearing with a 4-month lead time and a high price point.
Requirement: Find a faster-to-deliver alternative while keeping the original installation dimensions and load parameters unchanged.
Solution: Based on the customer’s original part drawing, we replicated the key dimensions and gear geometry 1:1, and raised raceway hardness to HRC 58–62.

45 DaysLead Time

1:1Dimensional Match

2ndRepeat Order

Slewing Bearing Model Finder

Model Finder

Slewing Bearing Model Finder

Filter 463 catalog specifications by dimension. Results update instantly — no page reload, no server round-trip.

Outer Diameter (mm)

—

Inner Diameter (mm)

—

Height (mm)

—

Geared Type

Module (mm)

Number Of Teeth

—

Matching 463 / 463 models

Model	Structure	Geared Type	OD (mm)	ID (mm)	Height	Module	Teeth	Weight (kg)

Header fixed · scroll for more rows

Frequently Asked Questions

Expert Insights and Reliable Solutions to Your Most Common Questions.

1. What types of slewing bearings does FDON GROUP provide?

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.

2. How do I choose the right bearing for my application?

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.

3. What materials does FDON GROUP use for slewing bearings?

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)

4. How can FDON GROUP achieve maximum service life?

Correct installation with flat surfaces.

Proper lubrication using grease.

Avoid overloading or shock loads over capacity.

Monitor operating conditions regularly to prevent debris entry.

5. What causes abnormal noise or vibration in bearings?

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.

6. What are lead times and lifetime guarantee?

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

7. Does FDON provide installation and technical support?

Yes — FDON GROUP offers:

Detailed installation manuals.

Online engineering support.

Guidance for lubrication, maintenance, and troubleshooting solution.

8. How do FDON Group differ from competitors?

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.