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Four-Point Contact Angular Contact Ball Bearings (General) QJ 1256 N2MA

Four-Point Contact Angular Contact Ball Bearings (General) QJ 1256 N2MA

The QJ 1256 N2MA is a four-point contact angular contact ball bearing, measuring 280mm by 500mm by 90mm. Built from chrome steel with a brass cage, it offers a robust design for heavy-duty applications.

This bearing handles radial loads up to 163800 lbf and operates smoothly at speeds up to 2000 RPM. Its single-row construction ensures reliable performance under demanding conditions.

The open design allows for easy lubrication, while the P6 tolerance class provides precision fit. It works well in temperatures ranging from -30°C to 110°C.

Ideal for industrial machinery like gearboxes or heavy equipment, this model is interchangeable with SKF bearings. Weighing 82kg, it’s built for durability and long service life. Compliant with RoHS and REACH standards.

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Product Parameters

  • Part Number QJ 1256 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 280 mm
  • Bore Dia Tolerance -0.025mm to 0
  • Outer Dia 500 mm
  • Outer Dia Tolerance -0.033mm to 0
  • Width 90 mm
  • Width Tolerance -0.05mm to 0
  • External Diameter On Inner Ring (Large Side Face) 365 mm
  • Internal Diameter On Outer Ring 415 mm
  • Chamfer Dimension 5 mm
  • Distance Pressure Point (a) 390 mm
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Brass
  • Dynamic Radial Load 163800 lbf
  • Static Radial Load 328500 lbf
  • Max Speed 2000 rpm
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Tolerance Class P6 (ABEC-3)
  • ROHS Compliant
  • REACH Compliant
  • Weight 82 kg
Four-Point Contact Angular Contact Ball Bearings (General) QJ 1256 N2MA dimension drawing
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Features

How Does QJ 1256 N2MA Bearing Handle Heavy Loads?

QJ 1256 N2MA Bearing is built with chrome steel rings and balls, offering strong resistance to heavy radial loads.
Its dynamic radial load capacity reaches 163800 lbf, ensuring reliable performance in demanding applications.

The brass cage maintains ball alignment, reducing friction and extending service life.
With a maximum speed of 2,000 rpm, it balances durability and efficiency in industrial settings.

QJ 1256 N2MA Bearing operates smoothly in temperatures ranging from -30° to 110°C.
Its open design allows for easy lubrication, ensuring consistent performance over time.

Application

Industrial Uses of QJ 1256 N2MA Bearing
QJ 1256 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.

Where Is QJ 1256 N2MA Bearing Used?
In wind turbines, QJ 1256 N2MA Bearing supports the main shaft, providing stability and durability in demanding conditions. Its metric dimensions and P6 tolerance make it a reliable choice for precision applications.

Built for Heavy-Duty Use: QJ 1256 N2MA Bearing
QJ 1256 N2MA Bearing excels in mining equipment, where its chrome steel construction withstands harsh environments. The lubricated design reduces friction, extending the bearing’s lifespan in continuous operation.

Automotive vs Aerospace: Applications of QJ 1256 N2MA Bearing
In automotive applications, QJ 1256 N2MA Bearing is found in large trucks and buses, handling heavy loads in transmissions. For aerospace, its precision and reliability make it suitable for landing gear systems.

Key Fields for QJ 1256 N2MA Bearing
QJ 1256 N2MA Bearing is ideal for construction machinery, such as cranes and excavators, where its high static radial load capacity ensures safety and performance. The open seal type allows for easy inspection and maintenance.

Q&A

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