Zb2.25.0972.400-1sppn Four-Point Contact Ball Slewing Bearing High-Quality Turntable Slewing Ring Bearing

• Customization: Available
• Standard or Nonstandard: Standard
• Feature: High Speed, Cold-Resistant, Corrosion-Resistant, Heat-Resistant
• Sealing Gland: Sealed On Both Sides
• Rolling-Element Number: Single-Row
• Roller Type: Straight Raceway
• Material: 50mn/42CrMo
• Type: External Gear
• Advantage: Low Noise, Low Vibration, High Precesion
• Seals Type: as Requirement NBR
• MOQ: 1 Set
• Application: Mining, Petroleum, Automatic, Excavator, Crane
• Certificate: 3.1, 3.2, ABS, BV, CCS, Nk
• Delivery Time: 3-40days
• OEM&ODM: Yes
• Precision: P0, P6, P5, P4, P3, P2
• Rolling Element: Gcr5
• Operating Tempereature: -40-+150
• Raceway Hardness: 55~62HRC
• Teeth: None Gear/Internal Gear/External Gear
• Transport Package: Plywood Package
• Specification: 50mm-8000mm
• Trademark: LYMC
• Origin: Luoyang
• HS Code: 8482109000
• Production Capacity: 3000PCS Per Year
• Package Size: 120.00cm * 120.00cm * 20.00cm
• Package Gross Weight: 240.000kg

Product Description

Zb2.25.0972.400-1sppn Four-point contact ball slewing bearing high-quality turntable slewing ring bearing
 

Product Description

 

The  ZB2 Series redefines compact high-precision drives through its innovative Double-Row Internal Gear System. Engineered for the most space-constrained yet demanding applications, this series delivers exceptional torque density, torsional rigidity, and smooth operation by reimagining the planetary gear architecture from the inside out.

Core Feature: Double-Row Internal Gear Architecture

The ZB2 Series incorporates a patented design featuring two parallel rows of internal gear teeth machined into a single, monolithic housing. This internal gear meshes with corresponding planetary pinions, creating a highly compact, robust, and balanced power transmission core. This inward-focused design is key to its performance advantages.

Key Features & Benefits

• Maximized Structural Rigidity & Compactness: By utilizing the housing itself as a precision internal gear, the structure becomes exceptionally rigid and integral. This eliminates alignment issues and allows for an extremely short axial length, offering one of the best torque-to-size ratios on the market.

• Exceptional Moment Load Capacity & Stability: The wide, dual-row internal gear support provides a large, continuous bearing surface for the planet pins. This results in superior capacity to handle high radial and axial moment loads directly at the output, ideal for cantilevered applications.

• Optimized Load Distribution & Smoothness: The dual-row internal gear design ensures perfectly balanced, symmetrical load sharing across all meshing points. This minimizes internal stresses, reduces vibration, and enables exceptionally smooth and quiet operation even under high loads and speeds.

• High Precision & Repeatability: The monolithic internal gear ensures exceptional concentricity and eliminates assembly tolerances found in multi-piece ring gears. Combined with precision-ground gears, this guarantees consistently low backlash and excellent positional accuracy.

• Integrated & Sealed Design: The design inherently reduces part count and potential leakage paths. When combined with advanced sealing, it provides superior protection against contamination in harsh environments.

• Efficient Heat Dissipation: The compact, high-metal-mass design of the internal gear housing allows for efficient thermal conductivity, aiding in heat dissipation during continuous duty cycles.

Core Advantages

• Unmatched Design Efficiency: Its ultra-compact form factor and high load capacity enable radical miniaturization of machinery, saving weight and space without sacrificing performance.

• Enhanced System Accuracy: The extreme rigidity and integrated construction minimize angular deflection, leading to higher dynamic stiffness, faster response times, and improved end-point accuracy in motion systems.

• Superior Reliability & Longevity: The balanced load distribution and robust monolithic structure significantly reduce wear on individual components, extending service life and mean time between failures .

• Simplified Integration: The compact, rigid flange design simplifies mounting and alignment, reducing installation time and complexity.

Application Fields

The ZB2 Series is the optimal choice for advanced applications where space, weight, and precision are critical constraints:

• Advanced Collaborative & Articulated Robotics: Ideal for robot wrist joints and forearm axes where compact size is crucial to dexterity, yet high torque and moment load capacity are required.

• Direct-Drive Rotary (DDR) Tables & High-Precision Indexers: Serves as the core drive element in compact, high-stiffness rotary stages for precision machining, inspection, and assembly.

• Aerospace & Defense Actuation: Used in compact actuation systems for flight control surfaces, radar positioning, and optical stabilization platforms where reliability and power density are paramount.

• Semiconductor Manufacturing: Precision stages for wafer steppers, probing stations, and nanoscale positioning equipment requiring minimal vibration and high stiffness.

• Medical & Surgical Robotics: Provides the necessary combination of compact size, high force output, and smooth, precise motion for surgical tools and diagnostic imaging devices.

• Advanced Optical & Laser Systems: Gimbals and positioning stages for high-power lasers, communication systems, and imaging equipment where stability is critical.
   

  Type		Dimensioni Dimensions									Fori di fissaggio    Fixing Holes						Dentatura Gear data						Weight
  Codice Code	Curva	De	de	di	Di	Dx	He	Hi	Ht	Hd	Fe	Fi	N	V	L	w	m	Z	xm	Dp	fz norm	fz max
  		[mm]	[ mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[-]		[mm]		[-	[mm]	-	[mm]	[mm]	[kN]	[kN]	[kg]
  EB2.22.0307.200-1SPPN	1	432	309	305	224	394	83	83	92	50	360	254	16	17	25	12	6	70	-	420	204	408	51
  EB2.22.0383.200-1SPPN	2	504	385	381	300	466	83	83	92	75	436	330	16	17	25	12	8	6	-	488	408	816	64
  EB2.25.0475.200-1SPPN	3	595	477	473	382	565	88	88	98	50	540	410	24	17	25	14	5	117	-	585	17	34	85
  EB2.25.0575.200-1SPPN	4	712	577	573	470	670	88	88	98	75	640	508	2	17	25	9	8	87	-	696	408	816	123
  EB2.20.0752.200-1SPPN	5	864	754	75	0  6	78  8	33	83	83	92	76	800	706	36	17	25	9	6	142-	85	2310	6,202	114
  EB2.25.0821.200-1SPPN	6	979	823	819	718	935	92	92	102	86	893	753	36	21	31	15	10	94	+11	940	7,063	14,126	200
  EB2.20.0968.200-1SPPN	7	1080	970	966	89	3  10	428	3	83	92	76	0159	22	30		25	0  8		3-	1064	4134	8,269	148
  EB2.25.1077.200-1SPPN	8	1200	1079	1075	976	1163	88	88	98	77	1135	1012	36	19	-	-	8	48	-	1184	4,189	8,378	210
  EB2.28.1215.200-1SPPN	9	1380	1218	1212	1095	1330	98	98	108	90	1290	1135	48	23	34	16	10	136	-	1360	612	1,224	325

  
   

  Detailed Photos

   

   

 

Related Slewing Bearing

 

Single row cross roller slewing bearing
Composed of two or three rings. compact structure, light weight, high manufacturing accuracy, small assembly gap and high requirement for installation accuracy. Rollers are 1:1 cross-arranged.
Can be bear axial force, overturning moment and large radial force at the same time,and widely used in lifting transportation, construction machinery and precesion products.

Double row ball slewing bearings
This kind of bearings can support high static loads with simple structures. They are mainly used in situations with variation load position and direction and continuously rotating. Main applications of this kind of bearings are deck hoisting, mining and material handling etc

 
Three row roller slewing bearing
Three row roller bearing able to bear all kinds of loads at the same time, it is the largest one of the four structural products with large axle and radial dimensions and firm structure. Especially suitable for heavy machinery requiring larger diameter, such as bucket wheel stacker and reclaimer, wheel crane, marine crane, port crane, ladle turret,large tonnage truck crane,heavy machinery and so on.
 

 

Product Process

Product Process

 

SLEWING BEARING RINGS

Rings are mainly made of 50Mn carbon steel or alloy steels such as 42CrMo4 and the choice of material depends on the required mechanical properties. Alloy steels are often used for heavy-duty applications. Their structural characteristics mean that heat treatments are more effective and greater surface hardness can be obtained than with carbon steels. Stainless steels such as AISI420 or AISI440C can be used for applications where corrosion resistance is required.

RACEWAYS

The raceways are heat-treated by induction in order to achieve a maximum surface hardness of 62 HRC for carbon or alloy steels, or 58 HRC for stainless steels. The hardening depth can vary depending on the type of steel. Hardening treatment is essential to allow the slewing coupling to support the heavy-duty loads it is exposed to in its intended application.

ROTATING ELEMENTS

The rotating elements used in slewing bearings may be balls or cylindrical rollers; both are typically made of 100Cr6 steel but other materials such as ceramic (zirconium oxide ZrO2 or silicon nitride Si3N4) or stainless steel (AISI440C) can be used. Rolling elements with different materials, sizes and precision grades are selected depending on the desired results.

CAGES OR SPACERS

Slewing bearing clearance plays a crucial role and is defined and optimised according to the application and performance to be achieved.
Cages or spacers made of different materials can be used to separate rolling elements, balls or rollers, depending on the loads and speeds required by the specific application.

PROTECTIONS

Special sliding seals are fitted between the inner and outer ring to protect the slewing bearing against the ingress of debris, dust or water particles that could affect its operation. The material used for seals is typically NBR rubber, but different materials can be chosen for specific applications.

LUBRICANT

The lubricant is another very important factor to ensure effective operation of the base bearing. The type of lubricant, quantity, quality, lubrication intervals, number and position of greasing points are determined according to the performance required of the slewing bearing and any specific customer requirements.

GEARED RINGS

Slewing bearing rings can be spur-gear or, more rarely, helical-gear. The gear module is sized and selected according to the application requirements.
Typically, the gearing is soft, i.e. untreated - the maximum hardness of untreated gears is 30 HRC for 42CrMo4. When service conditions require it, the gear surface can be induction-hardened to achieve a surface hardness of 60 HRC. Gear hardening is required when at least one of the following variables must be satisfied:

• high rolling torque
•  
• high rotating speed
•  
• unfavourable environmental conditions, presence of abrasive elements
•  
• maximum tooth lifetime

The experience gained by LYMC Bearing allows us to design slewing bearings to specific customer needs. You can get the right product for your machines or systems without having to compromise with an off-the-shelf product.

Customer Feedback

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Application

Application:

- Excavators - Drilling rigs - Mining Equipments - Cranes   -Offshore Equipments  - Vehicles  - Machine Tools  - Wind Turbines

Company Profile

About Us:
Luoyang MC Bearing Technology Co.,Ltd (LYMC),who is manufacture located in bearing zone, focus on Slewing bearing, cross roller bearing and pinion,Dia from 50mm-8000mm, Our team with technical and full experience in the bearing industry.
*Professional in researching, developing, producing & marketing high precision bearings for 16 years;
*Many series bearings are on stock; Factory directly provide, most competitive price;
*Advanced CNC equipment, guarantee product accuracy & stability;
*One stop purchasing, product include cross roller bearing, rotary table bearing, robotic bearing, slewing bearing, angular contact ball bearing, large and extra large custom made bearing, diameter from 50~9000mm;
*Excellent pre-sale & after sale service. We can go to customers' project site if needed.
*Professional technical & exporting team ensure excellent product design, quotation, delivering, documentation & custom clearance.

After Sales Service

 

Our Service:

FAQ:
1.Q: Are you trading company or manufacturer ?
A: We are professional slewing bearing manufacturer with 20 years' experience.
2.Q: How long is your delivery time?
A: Generally it is 4-5 days if the goods are in stock. or it is 45 days if the goods are not in
stock, Also it is according to quantity.
3.Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample, it is extra.
4.Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance, balance before shipment.
5.Q: Can you provide special customization according to the working conditions?
A: Sure, we can design and produce the slewing bearings for different working conditions.
6.Q: How about your guarantee?
A: We provide lifelong after-sales technical service.