121.32.3550.990.41.1502 Roller and Ball Combination Slewing Ring Bearing
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| Feature: | High Speed, Cold-Resistant, Corrosion-Resistant, Heat-Resistant |
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Basic Info.
- Model NO.
- 121.32.3550.990.41.1502
- 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
- External Gear Teeth
- Transport Package
- Plywood Package
- Specification
- 3772.8*3358*159mm
- Trademark
- LYMC
- Origin
- Luoyang
- HS Code
- 8482109000
- Production Capacity
- 3000PCS Per Year
Packaging & Delivery
- Package Size
- 380.00cm * 380.00cm * 50.00cm
- Package Gross Weight
- 2058.000kg
Product Description
The 121 Series represents the pinnacle of large-diameter slewing bearing technology. Engineered for the most demanding applications where extreme loads, massive dimensions, and uncompromising reliability are non-negotiable, these bearings are designed for machines that shape industries-from towering port cranes to massive tunnel borers.
Combining advanced engineering expertise with cutting-edge material science, the 121 Series delivers rotational precision on a monumental scale.
Design Philosophy: Engineered for Extremes
Unlike standard rolling element bearings, the 121 Series is designed as a complete structural component. Its robust construction allows it to simultaneously handle immense axial, radial, and tilting moment loads, effectively replacing complex multi-bearing arrangements.
1. Large-Scale Dimensions
The 121 Series is defined by its ability to maintain precision at scale.
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Diameter Range: Typically available from 1000 mm to over 6000 mm (up to 6 meters+), making them suitable for the world's largest heavy machinery.
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Cross-Section: Features an optimized, robust cross-section that maximizes stiffness while managing the overall weight of the bearing, a critical factor in mobile equipment design.
2. Optimized Raceway Geometry
The core strength of the 121 Series lies in its internal geometry.
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Four-Point Contact: Standard designs utilize a four-point contact system, where the balls contact the raceway at four distinct points. This provides exceptional stability and allows a single-row bearing to manage moment loads effectively.
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Load Distribution: Advanced computer modeling ensures optimal load distribution across the raceway, minimizing stress concentrations and extending service life even under high dynamic loads.
3. Material & Heat Treatment
The 121 Series places a heavy emphasis on metallurgical quality.
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Through-Hardened Raceways: The raceways are induction hardened to a precise depth, creating a wear-resistant surface capable of withstanding millions of rotations under load, while retaining a tough, ductile core to absorb shock loads.
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High-Purity Steels: Manufactured using high-purity alloys to eliminate inclusions that could lead to premature fatigue failure in critical applications.
Gearing & Drive Integration
For large-scale applications requiring controlled rotation, the 121 Series offers flexible gearing options:
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External & Internal Gearing: Available with fully integrated gearing cut directly into the race ring (typically on the inner or outer ring).
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High-Precision Teeth: Gears are manufactured to high precision standards, ensuring smooth engagement with drive pinions and minimizing backlash. This is essential for precise positioning in applications like radar antennas or large excavators.
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Customizable Modules: Gear teeth can be customized in module and number of teeth to suit specific drive torque requirements and pinion configurations.
Sealing Systems: Protection in Harsh Environments
Large bearings often operate in some of the dirtiest environments on earth-mines, construction sites, and offshore platforms. The 121 Series features advanced sealing technology:
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Heavy-Duty Seals: Equipped with durable, wear-resistant seals (often labyrinth or multi-lip designs) that provide a tight barrier against contaminants such as dust, sand, water jets, and concrete slurry.
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Lubrication Retention: The sealing system is designed to retain grease effectively, ensuring a continuous lubricating film across the raceways and gear teeth, which is vital for reducing wear.
Key Applications
The sheer size and load capacity of the 121 Series make it the preferred choice for large-scale original equipment manufacturers (OEMs) and heavy industries:
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Material Handling: Ship-to-shore cranes, stacker/reclaimers, and heavy-duty port unloaders.
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Construction & Mining: Large walking draglines, electric rope shovels, and tunnel boring machines (TBMs).
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Renewable Energy: Onshore and offshore wind turbines (pitch and yaw bearings).
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Industrial Equipment: Large-diameter welding positioners, heavy-duty turntables, and ladle turrets in steel mills.
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Defense & Aerospace: Large radar antennas and missile launcher systems.
Quality & Service Life
Every 121 Series bearing undergoes rigorous quality control, including 100% non-destructive testing of raceways. This commitment to quality translates into:
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Extended Maintenance Intervals: Designed for low maintenance with optimized re-lubrication features.
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High Operational Reliability: Reduces the risk of unplanned downtime in continuous operation processes.
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Long-Term Support: As a globally recognized solution, comprehensive after-sales service is available, including reconditioning, inspection, and spare parts support for decades after the initial purchase.
DrawingNo. DL [mm] |
[kg] | D. [mm] |
[mm | H [mm] |
L [mm |
[mm] | Number of bolt holes | hole cirde | B Bo holediameter |
M [mm] |
Number of grease | ana sad sapddu | 0 [mm |
[mm] | H [mm |
H [mm |
Distance at bottom | H | H. mm |
d [mm] |
m [mm] |
|
| n | [mm] | |||||||||||||||||||||
| 121.32.3550.990.41.1502 | 2028 | 3772.8 | 3358 | 159 | 3638 | 3418 | 76 | 30 | 27 | 10 | 3597 | 3509 | 109 | 143 | 16 | 50 | 3712 | 16 | ||||
| 121.32.3750.990.41.1502 | 2186 | 3980.8 | 3558 | 159 | 3846 | 3618 | 80 | 30 | 27 | 10 | 3797 | 3709 | 109 | 143 | 16 | 50 | 3936 | 16 | ||||
| 121.32.4000.990.41.1502 | 2278 | 4220.8 | 3808 | 159 | 4086 | 3868 | 84 | 30 | 27 | 12 | 4047 | 3959 | 109 | 143 | 16 | 50 | 4176 | 16 | ||||
| 121.32.4250.990.41.1502 | 2455 | 4476.8 | 4058 | 159 | 4342 | 4118 | 90 | 30 | 27 | 12 | 4297 | 4209 | 109 | 143 | 16 | 50 | 4416 | 16 | ||||
Application:
- Excavators - Drilling rigs - Mining Equipments - Cranes -Offshore Equipments - Vehicles - Machine Tools - Wind Turbines
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.
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.
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