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Four-Point Contact Angular Contact Ball Bearings (General) QJ 303 N2MA

Four-Point Contact Angular Contact Ball Bearings (General) QJ 303 N2MA

The QJ 303 N2MA is a compact four-point contact ball bearing, measuring 17mm by 47mm by 14mm, crafted from durable chrome steel. It handles radial loads up to 5265 lbf and spins smoothly at speeds up to 28,000 RPM.
Its brass cage ensures quiet operation and long life, while the open design allows easy lubrication. The bearing operates efficiently in temperatures from -30°C to 110°C.
With a P6 tolerance class, it offers reliable precision for demanding applications. Ideal for gearboxes or machinery where both radial and axial loads are present.
Weighing just 0.14kg, it’s lightweight yet robust. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number QJ 303 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 17 mm
  • Bore Dia Tolerance -0.007mm to 0
  • Outer Dia 47 mm
  • Outer Dia Tolerance -0.009mm to 0
  • Width 14 mm
  • Width Tolerance -0.05mm to 0
  • External Diameter On Inner Ring (Large Side Face) 27.7 mm
  • Internal Diameter On Outer Ring 36.3 mm
  • Chamfer Dimension 1 mm
  • Distance Pressure Point (a) 22 mm
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Brass
  • Dynamic Radial Load 5265 lbf
  • Static Radial Load 3375 lbf
  • Max Speed 28000 rpm
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Tolerance Class P6 (ABEC-3)
  • ROHS Compliant
  • REACH Compliant
  • Weight 0.14 kg
Four-Point Contact Angular Contact Ball Bearings (General) QJ 303 N2MA dimension drawing
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Features

Performance Features of QJ 303 N2MA Bearing

QJ 303 N2MA Bearing is designed with chrome steel rings and balls, offering strong resistance to radial loads.
Its dynamic radial load capacity reaches 5265 lbf, ensuring reliable performance in various applications.

The brass cage maintains ball alignment, reducing friction and extending service life.
With a maximum speed of 28,000 rpm, it balances high-speed operation and durability.

QJ 303 N2MA Bearing operates efficiently in temperatures from -30° to 110°C.
Its open design allows for easy lubrication, ensuring smooth performance over time.

The precision P6 tolerance class makes QJ 303 N2MA Bearing suitable for high-accuracy tasks.
Its compact size and robust construction make it ideal for space-constrained applications.

Application

Industrial Uses of QJ 303 N2MA Bearing
QJ 303 N2MA Bearing is commonly used in machine tools, where its four-point contact design handles both radial and axial loads efficiently. The brass cage ensures smooth operation even at high speeds, making it suitable for precision equipment.

In automotive applications, QJ 303 N2MA Bearing fits well in gearboxes and wheel hubs, providing reliable performance under varying loads. Its metric dimensions make it a versatile choice for many vehicle models.

For automation systems, QJ 303 N2MA Bearing works effectively in robotic arms and conveyor belts, thanks to its durable chrome steel construction. The open seal design allows for easy lubrication, extending its service life in demanding environments.

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