30311/DF

Design Features of 30311/DF Bearing

30311/DF features pairs of tapered rollers arranged to provide optimized load distribution, enhancing performance in both radial and axial directions. 30311/DF outer dia is 120 mm. Its bore dia is 55 mm. Its design allows for precise adjustment of internal clearance and preload, ensuring improved stability and reliability in high-load applications.

 

What Benefits Can 30311/DF Bearing Provide?

  • Enhanced Load Capacity: Their design allows for improved distribution of loads, enabling them to handle higher radial and axial forces effectively.
  • Improved Stability: The precise matching of the bearings ensures consistent performance and stability under varying loads and operating conditions.
  • Adjustable Internal Clearance: Users can customize the internal clearance and preload to suit specific application requirements, optimizing performance.
  • Reduced Friction: The tapered roller design minimizes friction between moving parts, leading to smoother operation and extended service life.
  • Versatile Applications: Suitable for a wide range of applications, from automotive to industrial machinery, due to their adaptability to different load and speed conditions.

 

What Can 30311/DF Bearing Be Used for?

  • Automotive: Utilized in wheel hubs, differentials, and transmission systems to support heavy loads and provide accurate alignment.
  • Industrial Machinery: Found in gearboxes, conveyors, and pumps, where they manage both radial and axial loads effectively.
  • Aerospace: Employed in aircraft landing gear and other critical components that require high reliability and performance under heavy loads.
  • Heavy Equipment: Used in construction and mining machinery to ensure stability and support in harsh operating conditions.
  • Railway: Applied in train axle boxes to handle the substantial loads and forces experienced during operation.

Part Number 30311/DF
System of Measurement Metric
Type Bearing
Bearing Type Roller
Roller Bearing Type Tapered
For Load Direction Combined
Construction Matched
Seal Type Open
Cups Type Standard
Bore Dia 55 mm
Bore Dia Tolerance -0.015mm to 0
Outer Dia 120 mm
Outer Dia Tolerance -0.018mm to 0
Total Width 63 mm
Total Width Tolerance +0.2mm to -0.2mm
Width Of Inner Rings 58 mm
Width Of Inner Rings Tolerance -0.15mm to 0
Width Of Lubrication Groove 8 mm
Diameter Of Lubrication Hole 4.5 mm
Chamfer Dimension Inner Ring min.0.6 mm
Chamfer Dimension Outer Ring min.2 mm
Ring Material Chrome Steel
Roller Material Chrome Steel
Cage Material Steel
Abutment Diameter Shaft 72 mm
Abutment Diameter Housing 72 mm
Fillet Radius max.2.5 mm
Reference Speed 3800 r/min
Limiting Speed 5600 r/min
Dynamic Radial Load 67950 lbf
Static Radial Load 73125 lbf
Fatigue Load Limit 8775 lbf
Lubrication Required
Temperature Range -30° to 110 °C
ABEC Rating ABEC-1
Radial Clearance Standard (Available in C3/C4/C5)
RoHS Compliant
REACH Compliant
Weight 7.19 lb

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