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Four-Point Contact Angular Contact Ball Bearings (General) QJ 318 N2MA
Four-Point Contact Angular Contact Ball Bearings (General) QJ 318 N2MA

Four-Point Contact Angular Contact Ball Bearings (General) QJ 318 N2MA

The QJ 318 N2MA is a four-point contact angular contact ball bearing with a 90mm bore and 190mm outer diameter, crafted from sturdy chrome steel. It manages radial loads up to 64125 lbf and operates smoothly at speeds up to 6300 RPM.

Its single-row design and open construction make maintenance straightforward, 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 dependable replacement option. Suitable for applications like industrial gearboxes or heavy machinery where radial and axial loads are present.

Weighing 6.45kg, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, ensuring safe and eco-friendly use.

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Product Parameters

  • Part Number QJ 318 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 90 mm
  • Bore Dia Tolerance -0.015mm to 0
  • Outer Dia 190 mm
  • Outer Dia Tolerance -0.02mm to 0
  • Width 43 mm
  • Width Tolerance -0.05mm to 0
  • External Diameter On Inner Ring (Large Side Face) 124 mm
  • Internal Diameter On Outer Ring 156 mm
  • Chamfer Dimension 3 mm
  • Distance Pressure Point (a) 98 mm
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Brass
  • Dynamic Radial Load 64125 lbf
  • Static Radial Load 68625 lbf
  • Max Speed 6300 rpm
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Tolerance Class P6 (ABEC-3)
  • ROHS Compliant
  • REACH Compliant
  • Weight 6.45 kg

Features

Engineered for Precision: QJ 318 N2MA Bearing

QJ 318 N2MA Bearing features a four-point contact design, allowing it to handle both radial and axial loads efficiently.
Its chrome steel rings and balls provide durability, while the brass cage ensures smooth operation.

With a dynamic radial load capacity of 64125 lbf, QJ 318 N2MA Bearing is suitable for heavy-duty applications.
The P6 tolerance class guarantees high precision, making it ideal for demanding machinery.

QJ 318 N2MA Bearing operates smoothly at speeds up to 6,300 rpm, balancing performance and reliability.
Its open design simplifies maintenance, reducing downtime and operational costs.

Application

Industrial Uses of QJ 318 N2MA Bearing
QJ 318 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.

In automotive applications, QJ 318 N2MA Bearing fits well in heavy-duty transmissions and wheel hubs, providing reliable performance under varying load conditions. Its metric dimensions make it a versatile choice for global vehicle designs.

For automation systems, QJ 318 N2MA Bearing supports robotic arms and precision assembly lines, where its P6 tolerance class ensures consistent accuracy. The open seal design allows for easy lubrication, extending service life in continuous operations.

Where Is QJ 318 N2MA Bearing Used?
You’ll find QJ 318 N2MA Bearing in wind turbine yaw systems, where its ability to manage multi-directional loads is crucial. The chrome steel construction also resists wear in harsh outdoor environments.

In medical imaging devices, QJ 318 N2MA Bearing offers stable rotation for components like CT scanner gantries. Its precise tolerances and smooth operation are key for diagnostic accuracy.

Built for Heavy-Duty Use: QJ 318 N2MA Bearing
QJ 318 N2MA Bearing excels in construction equipment, such as crane slewing rings, thanks to its high dynamic load capacity. The lubricated design reduces friction, even under constant heavy use.

For consumer appliances like large industrial fans, QJ 318 N2MA Bearing provides quiet and reliable performance. Its brass cage helps dampen vibrations, making it ideal for noise-sensitive environments.

Automotive vs Aerospace: Applications of QJ 318 N2MA Bearing
In automotive systems, QJ 318 N2MA Bearing is often used in high-performance drivetrains, where durability and load handling are priorities. The metric sizing ensures compatibility with European and Asian models.

Aerospace applications benefit from QJ 318 N2MA Bearing’s precision in landing gear mechanisms, where consistent performance under stress is critical. The P6 tolerance class meets stringent aviation standards.

Q&A

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