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Four-Point Contact Angular Contact Ball Bearings (General) QJ 1240 N2MA
Four-Point Contact Angular Contact Ball Bearings (General) QJ 1240 N2MA

Four-Point Contact Angular Contact Ball Bearings (General) QJ 1240 N2MA

The QJ 1240 N2MA is a four-point contact angular contact ball bearing with a 200mm bore and 360mm outer diameter, crafted from sturdy chrome steel. It handles radial loads up to 117000 lbf and operates smoothly at speeds up to 3000 RPM.

Its single-row design and brass cage ensure 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. Suitable for heavy-duty applications like industrial machinery or gear systems where radial loads are significant.

Weighing 32.5kg, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards for safe and eco-friendly use.

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Product Parameters

  • Part Number QJ 1240 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 200 mm
  • Bore Dia Tolerance -0.022mm to 0
  • Outer Dia 360 mm
  • Outer Dia Tolerance -0.028mm to 0
  • Width 70 mm
  • Width Tolerance -0.05mm to 0
  • External Diameter On Inner Ring (Large Side Face) 260 mm
  • Internal Diameter On Outer Ring 300 mm
  • Chamfer Dimension 4 mm
  • Distance Pressure Point (a) 280 mm
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Brass
  • Dynamic Radial Load 117000 lbf
  • Static Radial Load 194625 lbf
  • Max Speed 3000 rpm
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Tolerance Class P6 (ABEC-3)
  • ROHS Compliant
  • REACH Compliant
  • Weight 32.5 kg

Features

Performance Features of QJ 1240 N2MA Bearing

QJ 1240 N2MA Bearing is built with chrome steel rings and balls, offering strong resistance to radial loads.
Its dynamic radial load capacity reaches 117000 lbf, ensuring reliable performance in heavy-duty applications.

The brass cage maintains ball alignment, reducing friction and extending operational life.
With a maximum speed of 3,000 rpm, it balances durability and efficiency in demanding conditions.

QJ 1240 N2MA Bearing operates smoothly within a temperature range of -30° to 110°C.
Its open design allows for easy lubrication, reducing maintenance requirements.

Application

Industrial Uses of QJ 1240 N2MA Bearing
QJ 1240 N2MA Bearing is commonly used in heavy machinery, such as industrial gearboxes and large conveyor systems, 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 1240 N2MA Bearing Used?
In automotive applications, QJ 1240 N2MA Bearing fits well in large transmission systems, providing stability and durability. Its metric dimensions make it a reliable choice for European and Asian vehicle manufacturers.

Built for Heavy-Duty Use: QJ 1240 N2MA Bearing
For automation and robotics, QJ 1240 N2MA Bearing supports high-precision movements in robotic arms and assembly lines. The chrome steel construction offers long-lasting performance in demanding environments.

Automotive vs Aerospace: Applications of QJ 1240 N2MA Bearing
In aerospace, QJ 1240 N2MA Bearing is suited for landing gear systems, where its load capacity and precision are critical. Meanwhile, in automotive, it excels in heavy-duty truck axles and drivetrains.

Essential Roles of QJ 1240 N2MA Bearing
QJ 1240 N2MA Bearing is ideal for wind turbine yaw systems, where its ability to handle varying loads ensures reliable energy production. The P6 tolerance class guarantees consistent performance in harsh conditions.

Q&A

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