245*305*33mm Crawler Excavator Bearing BA245-2A Special Angular Contact Ball Bearing
245*305*33mm Crawler Excavator Bearing BA245-2A Special Angular Contact Ball Bearing
Precision Rating： P5
Number of Rows ：Single row
Brand Name：TFL
Seals Type：OPEN
Bearing Material：Chrome Steel GCR-15
Quality standard：ISO 9001:2008 approved
245*305*33mm Crawler Excavator Bearing BA245-2A Special Angular Contact Ball Bearing
The contact area between the rolling element and the inner and outer rings of angular contact ball bearings is relatively small, so their frictional resistance is relatively small and they can withstand higher rotational speeds. Under high-speed operation, angular contact ball bearings can still maintain good stability and accuracy, and are suitable for various high-speed mechanical equipment, such as high-speed machine tools, aviation engines, etc.
Application：
Excavator specialized angular ball bearing are used for the application of excavator machinery. This kind of angular
contact ball bearing has big contact angle(40 degree), so can under take big axial load, and aslo axial radial allied load.
Moreover it can carry heavier load capacity than the same size bearings because it has more balls inside. It is widely used for
all imported exavator.
contact ball bearing has big contact angle(40 degree), so can under take big axial load, and aslo axial radial allied load.
Moreover it can carry heavier load capacity than the same size bearings because it has more balls inside. It is widely used for
all imported exavator.
FAQ1: What are the BA245-2A Excavator Bearing Specifications？
The BA245-2A is a large-diameter angular contact ball bearing, typically used in the final drive (travel motor) of heavy excavators (often seen in 20-30 ton class machines like Komatsu or Hitachi).
The Dimensions are as follows:
Inner Diameter (d): 245 mm
Outer Diameter (D): 310 mm
Width (B): 38 mm.
Features: It features a high-strength steel cage and optimized internal geometry to handle the slow-speed, high-torque rotation of crawler tracks.
FAQ2: How to Choose Angular Contact Bearings for Excavators?
Choosing the right bearing involves more than just matching the size. Consider these three factors:
Load Rating (Dynamic vs. Static): Ensure the replacement matches the original OEM load capacity. A bearing that “fits” but has fewer internal balls will fail prematurely.
Accuracy Class: For travel motors, P6 or P5 precision is recommended. Lower-grade industrial bearings may cause excessive heat buildup.
The “Suffix” Matters: Pay close attention to letters at the end of the part number (e.g., -2A, -6A, -1A). These indicate specific internal clearances, cage materials, or seal types that are critical for fitment.
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