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Four-Point Contact Angular Contact Ball Bearings (General) QJ 248 N2MA
Four-Point Contact Angular Contact Ball Bearings (General) QJ 248 N2MA

Four-Point Contact Angular Contact Ball Bearings (General) QJ 248 N2MA

The QJ 248 N2MA is a four-point contact angular contact ball bearing, measuring 240mm by 440mm with a width of 72mm. Made from chrome steel, it’s built to handle heavy radial loads up to 146250 lbf.

Its single-row design and open seal allow for easy lubrication, while the brass cage ensures smooth operation. The bearing can spin at speeds up to 2400 RPM and works in temperatures from -30°C to 110°C.

With a P6 tolerance class, it offers reliable precision for demanding applications. Ideal for industrial machinery like gearboxes or heavy-duty equipment where radial loads are common.

Weighing 53.2kg, it’s a sturdy choice for large-scale setups. Compliant with RoHS and REACH standards, it’s also interchangeable with SKF bearings for easy replacement.

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Product Parameters

  • Part Number QJ 248 N2MA
  • Brand TFL
  • Interchangeable SKF
  • System of Measurement Metric
  • Bearing Type Ball
  • For Load Direction Four Point Contact
  • Construction Single Row
  • Seal Type Open
  • Bore Dia 240 mm
  • Bore Dia Tolerance -0.022mm to 0
  • Outer Dia 440 mm
  • Outer Dia Tolerance -0.033mm to 0
  • Width 72 mm
  • Width Tolerance -0.05mm to 0
  • External Diameter On Inner Ring (Large Side Face) 315 mm
  • Internal Diameter On Outer Ring 365 mm
  • Chamfer Dimension 4 mm
  • Distance Pressure Point (a) 238 mm
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Brass
  • Dynamic Radial Load 146250 lbf
  • Static Radial Load 270000 lbf
  • Max Speed 2400 rpm
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Tolerance Class P6 (ABEC-3)
  • ROHS Compliant
  • REACH Compliant
  • Weight 53.2 kg
  • Price($) 2692.71

Features

Performance Features of QJ 248 N2MA Bearing

QJ 248 N2MA Bearing is built with chrome steel rings and balls, offering excellent resistance to heavy radial loads.
Its dynamic radial load capacity reaches 146250 lbf, making it suitable for demanding industrial applications.

The brass cage ensures smooth ball movement, reducing friction and enhancing durability.
With a maximum speed of 2,400 rpm, it delivers reliable performance under high-stress conditions.

QJ 248 N2MA Bearing operates efficiently in temperatures ranging from -30° to 110 °C.
Its open design allows for easy lubrication, ensuring consistent performance over time.

The precision P6 tolerance class ensures accurate alignment and smooth operation.
This makes QJ 248 N2MA Bearing a dependable choice for heavy-duty machinery.

Application

Industrial Uses of QJ 248 N2MA Bearing
QJ 248 N2MA Bearing is commonly used in heavy machinery, such as large-scale conveyor systems and industrial presses, where its four-point contact design handles combined radial and axial loads efficiently. The brass cage ensures smooth operation even under high stress.

What Makes QJ 248 N2MA Bearing a Preferred Choice?
In wind turbine applications, QJ 248 N2MA Bearing’s robust construction and high load capacity make it ideal for supporting rotor shafts. Its P6 tolerance class ensures precision in demanding environments.

Built for Heavy-Duty Use: QJ 248 N2MA Bearing
This bearing excels in steel mills and mining equipment, where its chrome steel rings and balls withstand extreme conditions. The open design allows for easy lubrication, extending service life.

Automotive vs Aerospace: Applications of QJ 248 N2MA Bearing
In automotive gearboxes, QJ 248 N2MA Bearing provides reliable performance under heavy loads. For aerospace applications, its precision and durability make it suitable for landing gear mechanisms.

Perfect Fit for Automation: QJ 248 N2MA Bearing
QJ 248 N2MA Bearing is often found in robotic arms and automated assembly lines, where its high-speed capability and low friction enhance efficiency. The metric sizing ensures compatibility with European machinery standards.

Q&A

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