Part Number | 3R8-98P9 |
Brand: BearingMaker | Interchangeable With: ROTEK |
System of Measurement | Inch |
Series | 10000 Series |
Gear | Without Gear |
Type | Roller |
Bearing Type | Standard |
Product Type | Slewing Beraing |
Inside Diameter Of Inner Ring | 91.34″ |
Outside Diameter Of Outer Ring | 105.12″ |
Internal Diameter On Outer Ring | 97.40″ |
External Diameter On Inner Ring | 97.13″ |
Height Of Overall Bearing Assembly | 5.79″ |
Height Of Inner Ring | 4.49″ |
Height Of Outer Ring | 5.43″ |
Bolt Circle In Inner Ring | 93.504″ |
Bolt Circle In Outer Ring | 102.953″ |
Size Holes In Inner Ring | 1.3 |
Size Holes In Outer Ring | 1.3 |
Number Holes In Inner Ring | 54 |
Number Holes In Outer Ring | 54 |
Basic Static Load Rating(C0a) | 3470000 lbs |
Basic Static Load Rating(C0r) | 489000 lbs |
Moment Load Rating | 6304000 ft-lbs |
Correspond | 3 |
Ring Material | 42CRO or 50MN |
Ball Materrial | Chrome Steel |
Cage Material | Nylon or 300 Series Stainless Steel |
Seal Material | NBR |
RoHS | Compliant |
Weight | 2509 lbs |
K | 1.3 |

3R8-98P9
Design Features of 3R8-98P9 Bearing
The 3R8-98P9 is designed with three raceways arranged in a cross pattern, allowing it to handle radial, axial, and tilting moments simultaneously. 3R8-98P9 inside diameter of inner ring is 91.34″. Its outside diameter of outer ring is 105.12″. This structure ensures high load capacity, stability, and precision, making it ideal for heavy-duty applications like cranes and heavy machinery.
What Benefits Can 3R8-98P9 Bearing Provide?
- High Load Capacity: It can handle axial, radial, and tilting moments all at once, making it ideal for heavy loads.
- Compact Design: It has a more compact and lighter design compared to other types of bearings, saving space in machinery.
- Precision and Stability: The cross roller structure helps with smooth and precise motion, improving stability during operation.
- Versatility: Suitable for various applications, including cranes, excavators, and robotics, due to its ability to support a wide range of forces.
- Durability: It has a long service life due to its high load-bearing capacity and stability under harsh conditions.
What Can 3R8-98P9 Bearing Be Used for?
- Cranes: For rotating the crane’s boom.
- Excavators: To help the bucket rotate.
- Medical equipment: In machines like CT scanners.
- Wind turbines: For smooth turning of the blades.
- Robots: In robotic arms for precise rotation.
- Mining machines: For rotating heavy parts.
- Construction equipment: For rotating the machine body.