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Four-Point Contact Angular Contact Ball Bearings (General) QJ 314 MA

Four-Point Contact Angular Contact Ball Bearings (General) QJ 314 MA

The QJ 314 MA is a four-point contact angular contact ball bearing with a 70mm bore and 150mm outer diameter, crafted from sturdy chrome steel. It manages radial loads up to 45000 lbf and operates smoothly at speeds reaching 8000 RPM.

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

This model is interchangeable with SKF bearings, offering a practical replacement option. Suitable for applications like industrial gearboxes or heavy machinery where radial and axial loads are present.

Weighing 3.15kg, it balances strength and size effectively. Compliant with RoHS and REACH standards for safe and eco-friendly use.

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Product Parameters

  • Part Number QJ 314 MA
  • 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 70 mm
  • Bore Dia Tolerance -0.012mm to 0
  • Outer Dia 150 mm
  • Outer Dia Tolerance -0.015mm to 0
  • Width 35 mm
  • Width Tolerance -0.05mm to 0
  • External Diameter On Inner Ring (Large Side Face) 89 mm
  • Internal Diameter On Outer Ring 123 mm
  • Chamfer Dimension 2.1 mm
  • Distance Pressure Point (a) 77 mm
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Brass
  • Dynamic Radial Load 45000 lbf
  • Static Radial Load 40500 lbf
  • Max Speed 8000 rpm
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Tolerance Class P6 (ABEC-3)
  • ROHS Compliant
  • REACH Compliant
  • Weight 3.15 kg
Four-Point Contact Angular Contact Ball Bearings (General) QJ 314 MA dimension drawing
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Features

Why Choose QJ 314 MA Bearing for Precision Tasks?

QJ 314 MA Bearing features a four-point contact design, offering high precision and load capacity.

Its chrome steel rings and balls ensure durability and smooth operation under radial loads up to 45000 lbf.

The brass cage maintains ball alignment, reducing friction and extending service life.

With a maximum speed of 8,000 rpm, it is suitable for high-performance applications.

Application

Industrial Uses of QJ 314 MA Bearing
QJ 314 MA 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.

What Makes QJ 314 MA Bearing a Preferred Choice?
In automotive applications, QJ 314 MA Bearing is ideal for wheel hubs and transmission systems, thanks to its robust chrome steel construction. Its metric sizing and P6 tolerance make it a reliable fit for precision components.

Built for Heavy-Duty Use: QJ 314 MA Bearing
For automation equipment like robotic arms, QJ 314 MA Bearing offers excellent load capacity and durability. The open design allows for easy lubrication, extending its service life in continuous operation.

Medical vs Industrial: Where QJ 314 MA Bearing Excels
While QJ 314 MA Bearing is suited for industrial presses, its precision also benefits medical imaging devices requiring stable rotation. The temperature range ensures performance in varied environments.

Where to Use QJ 314 MA Bearing
In consumer electronics, QJ 314 MA Bearing can be found in high-performance fans and printers, where its smooth operation reduces noise. The lubricated design minimises maintenance needs for long-term use.

Q&A

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