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Four-Point Contact Angular Contact Ball Bearings (General) QJ 1276 N2MA

Four-Point Contact Angular Contact Ball Bearings (General) QJ 1276 N2MA

The QJ 1276 N2MA is a four-point contact angular contact ball bearing with a 380mm bore and 680mm outer diameter, built from sturdy chrome steel. It handles heavy radial loads up to 263,250 lbf and operates smoothly at speeds up to 1400 RPM.

Its single-row design with a brass cage ensures durability, while the open seal allows for easy lubrication. The bearing performs reliably in temperatures ranging from -30°C to 110°C.

This model is interchangeable with SKF bearings, making it a practical choice for replacements. Ideal for heavy machinery or industrial equipment where high radial loads are common.

Weighing 220kg, it’s a robust unit designed for long-term use. Compliant with RoHS and REACH standards for safety and environmental care.

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Product Parameters

  • Part Number QJ 1276 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 380 mm
  • Bore Dia Tolerance -0.03mm to 0
  • Outer Dia 680 mm
  • Outer Dia Tolerance -0.045mm to 0
  • Width 132 mm
  • Width Tolerance -0.05mm to 0
  • External Diameter On Inner Ring (Large Side Face) 494 mm
  • Internal Diameter On Outer Ring 566 mm
  • Chamfer Dimension 6 mm
  • Distance Pressure Point (a) 530 mm
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Brass
  • Dynamic Radial Load 263250 lbf
  • Static Radial Load 641250 lbf
  • Max Speed 1400 rpm
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Tolerance Class P6 (ABEC-3)
  • ROHS Compliant
  • REACH Compliant
  • Weight 220 kg
Four-Point Contact Angular Contact Ball Bearings (General) QJ 1276 N2MA dimension drawing
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Features

Performance Features of QJ 1276 N2MA Bearing

QJ 1276 N2MA Bearing is built with chrome steel rings and balls, offering high resistance to both radial and axial loads.
Its dynamic radial load capacity reaches 263,250 lbf, making it suitable for heavy-duty applications.

The brass cage ensures smooth operation by keeping the balls aligned, reducing friction and wear.
With a maximum speed of 1,400 rpm, it balances performance and durability in demanding conditions.

QJ 1276 N2MA Bearing operates efficiently within a temperature range of -30° to 110°C.
Its precision P6 tolerance class ensures reliable performance in high-precision machinery.

The open design simplifies maintenance, while the robust construction extends service life.
This bearing is ideal for applications requiring high load capacity and smooth operation.

Application

Industrial Uses of QJ 1276 N2MA Bearing
QJ 1276 N2MA Bearing is commonly used in heavy machinery like industrial presses and large gearboxes, 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 1276 N2MA Bearing a Preferred Choice?
In wind turbine systems, QJ 1276 N2MA Bearing’s large size 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 1276 N2MA Bearing
For mining equipment, QJ 1276 N2MA Bearing’s chrome steel construction provides durability in harsh conditions. The lubricated design reduces friction, extending service life in high-load applications.

Automotive vs Aerospace: Applications of QJ 1276 N2MA Bearing
In automotive applications, QJ 1276 N2MA Bearing suits large trucks and buses, while in aerospace, it’s used in landing gear systems. Its metric sizing ensures compatibility across industries.

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