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Four-Point Contact Angular Contact Ball Bearings (General) QJ 1988 N2MA

Four-Point Contact Angular Contact Ball Bearings (General) QJ 1988 N2MA

The QJ 1988 N2MA is a four-point contact angular contact ball bearing, measuring 440mm by 600mm by 74mm. Made from durable chrome steel, it handles radial loads up to 171225 lbf and operates smoothly at speeds up to 1500 RPM.

Its single-row design with a brass cage ensures reliable performance, while the open seal allows for easy lubrication. The bearing works well in temperatures ranging from -30°C to 110°C.

This model is interchangeable with SKF bearings, making it a practical choice for replacements. Ideal for heavy-duty applications like industrial machinery or large gearboxes where high radial loads are common.

Weighing 64kg, it’s built for robust performance. Compliant with RoHS and REACH standards, it meets stringent safety and environmental requirements.

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Product Parameters

  • Part Number QJ 1988 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 440 mm
  • Bore Dia Tolerance -0.035mm to 0
  • Outer Dia 600 mm
  • Outer Dia Tolerance -0.038mm to 0
  • Width 74 mm
  • Width Tolerance -0.05mm to 0
  • External Diameter On Inner Ring (Large Side Face) 495 mm
  • Internal Diameter On Outer Ring 544 mm
  • Chamfer Dimension 4 mm
  • Distance Pressure Point (a) 364 mm
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Brass
  • Dynamic Radial Load 171225 lbf
  • Static Radial Load 427500 lbf
  • Max Speed 1500 rpm
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Tolerance Class P6 (ABEC-3)
  • ROHS Compliant
  • REACH Compliant
  • Weight 64 kg
Four-Point Contact Angular Contact Ball Bearings (General) QJ 1988 N2MA dimension drawing
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Features

Performance Features of QJ 1988 N2MA Bearing

QJ 1988 N2MA Bearing is designed for four-point contact, offering excellent radial load capacity up to 171225 lbf.

Its chrome steel rings and balls ensure durability, while the brass cage maintains proper ball alignment.

With a maximum speed of 1,500 rpm, it balances performance and reliability in demanding applications.

The P6 tolerance class ensures precision, making it suitable for high-accuracy machinery.

Application

Industrial Uses of QJ 1988 N2MA Bearing
QJ 1988 N2MA Bearing is commonly used in heavy machinery like cranes and mining equipment, where its four-point contact design handles combined radial and axial loads efficiently. The brass cage ensures smooth operation even under high stress.

In wind turbine systems, QJ 1988 N2MA Bearing supports the main shaft, providing stability and durability in harsh weather conditions. Its large bore diameter and metric sizing make it ideal for European-designed turbines.

For industrial gearboxes, QJ 1988 N2MA Bearing’s chrome steel construction offers reliable performance in high-torque applications. The open seal design allows for easy lubrication, extending the bearing’s service life.

Where Is QJ 1988 N2MA Bearing Used?
QJ 1988 N2MA Bearing is often found in steel mills, where it supports rolling mill stands and handles heavy loads. Its P6 tolerance class ensures precision in demanding environments.

In marine applications, QJ 1988 N2MA Bearing is used in propeller shafts, thanks to its corrosion-resistant materials and robust design. The lubricated construction helps maintain performance in saltwater conditions.

Built for Heavy-Duty Use: QJ 1988 N2MA Bearing
QJ 1988 N2MA Bearing excels in construction equipment like excavators, where its high static radial load capacity is crucial. The brass cage reduces friction, enhancing overall efficiency.

For paper manufacturing machines, QJ 1988 N2MA Bearing provides reliable support in high-speed rollers. Its temperature range ensures consistent performance in both hot and cold operating conditions.

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