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Four-Point Contact Angular Contact Ball Bearings (General) QJ 344 N2MA
Four-Point Contact Angular Contact Ball Bearings (General) QJ 344 N2MA

Four-Point Contact Angular Contact Ball Bearings (General) QJ 344 N2MA

The QJ 344 N2MA is a four-point contact angular contact ball bearing with a 220mm bore and 460mm outer diameter, crafted from sturdy chrome steel. It handles radial loads up to 175500 lbf and operates smoothly at speeds up to 2400 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 gearboxes or large machinery where radial loads are significant.

Weighing 78kg, it’s built for robust performance. Compliant with RoHS and REACH standards for safe and environmentally friendly use.

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Product Parameters

  • Part Number QJ 344 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 220 mm
  • Bore Dia Tolerance -0.022mm to 0
  • Outer Dia 460 mm
  • Outer Dia Tolerance -0.033mm to 0
  • Width 88 mm
  • Width Tolerance -0.05mm to 0
  • External Diameter On Inner Ring (Large Side Face) 308 mm
  • Internal Diameter On Outer Ring 372 mm
  • Chamfer Dimension 5 mm
  • Distance Pressure Point (a) 238 mm
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Brass
  • Dynamic Radial Load 175500 lbf
  • Static Radial Load 315000 lbf
  • Max Speed 2400 rpm
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Tolerance Class P6 (ABEC-3)
  • ROHS Compliant
  • REACH Compliant
  • Weight 78 kg

Features

Performance Features of QJ 344 N2MA Bearing

QJ 344 N2MA Bearing is built with chrome steel rings and balls, offering robust resistance to radial loads.
Its dynamic radial load capacity reaches 175500 lbf, ensuring dependable performance in heavy-duty applications.

The brass cage maintains ball alignment, reducing friction and enhancing longevity.
With a maximum speed of 2,400 rpm, it delivers a balance of durability and efficiency.

QJ 344 N2MA Bearing operates smoothly in temperatures ranging from -30° to 110°C.
Its open design allows for easy lubrication, ensuring consistent performance over time.

The precise P6 tolerance class ensures reliable operation in demanding conditions.
This makes QJ 344 N2MA Bearing suitable for a variety of industrial applications.

Application

Industrial Uses of QJ 344 N2MA Bearing
QJ 344 N2MA Bearing is commonly used in heavy machinery, such as large gearboxes and industrial rotors, where its four-point contact design handles combined radial and axial loads efficiently. The open seal type allows for easy lubrication, ensuring long service life in demanding conditions.

Where Is QJ 344 N2MA Bearing Used?
In wind turbines, QJ 344 N2MA Bearing supports the main shaft, providing stability under varying loads and speeds. Its brass cage reduces friction, making it suitable for high-torque applications.

Built for Heavy-Duty Use: QJ 344 N2MA Bearing
This bearing excels in steel mills and mining equipment, where its chrome steel construction withstands extreme loads and harsh environments. The P6 tolerance class ensures reliable precision even under stress.

Automotive vs Aerospace: Applications of QJ 344 N2MA Bearing
In automotive applications, QJ 344 N2MA Bearing is found in large truck transmissions, while in aerospace, it supports landing gear mechanisms. Its metric sizing and high load capacity make it versatile across industries.

Key Fields for QJ 344 N2MA Bearing
QJ 344 N2MA Bearing is ideal for construction equipment like cranes, where its dynamic radial load capacity ensures smooth operation. The lubricated design minimises wear, even in continuous use.

Q&A

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