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Four-Point Contact Angular Contact Ball Bearings (General) QJ 1272 N2MA
Four-Point Contact Angular Contact Ball Bearings (General) QJ 1272 N2MA

Four-Point Contact Angular Contact Ball Bearings (General) QJ 1272 N2MA

The QJ 1272 N2MA is a four-point contact angular contact ball bearing, measuring 360mm in bore diameter and 650mm in outer diameter, with a width of 122mm. Made from chrome steel, it’s built to handle heavy radial loads up to 249750 lbf.

Its single-row design and open seal type make it easy to maintain, while the brass cage ensures smooth operation. The bearing can handle speeds up to 1500 RPM and works in temperatures from -30°C to 110°C.

With a P6 tolerance class, it offers precise performance for demanding applications. This model is interchangeable with SKF bearings, making it a reliable choice for replacements.

Ideal for heavy machinery or industrial equipment where high radial loads are common. Weighing 190kg, it’s a robust option for large-scale applications. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number QJ 1272 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 360 mm
  • Bore Dia Tolerance -0.03mm to 0
  • Outer Dia 650 mm
  • Outer Dia Tolerance -0.045mm to 0
  • Width 122 mm
  • Width Tolerance -0.05mm to 0
  • External Diameter On Inner Ring (Large Side Face) 472 mm
  • Internal Diameter On Outer Ring 538 mm
  • Chamfer Dimension 6 mm
  • Distance Pressure Point (a) 505 mm
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Brass
  • Dynamic Radial Load 249750 lbf
  • Static Radial Load 585000 lbf
  • Max Speed 1500 rpm
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Tolerance Class P6 (ABEC-3)
  • ROHS Compliant
  • REACH Compliant
  • Weight 190 kg

Features

Performance Features of QJ 1272 N2MA Bearing

QJ 1272 N2MA Bearing is built with chrome steel rings and balls, offering strong resistance to radial loads.
Its dynamic radial load capacity reaches 249750 lbf, making it suitable for heavy-duty applications.

The brass cage ensures smooth operation by keeping the balls aligned and reducing friction.
With a maximum speed of 1,500 rpm, it balances performance and durability.

QJ 1272 N2MA Bearing operates efficiently in temperatures ranging from -30° to 110 °C.
Its open design allows for easy lubrication, ensuring long service life.

The precision P6 tolerance class ensures reliable performance in demanding conditions.
This makes QJ 1272 N2MA Bearing a dependable choice for industrial applications.

Application

Industrial Uses of QJ 1272 N2MA Bearing
QJ 1272 N2MA Bearing is commonly used in heavy machinery, such as large-scale conveyor systems and industrial presses, where its four-point contact design handles combined radial and axial loads efficiently. The brass cage ensures smooth operation even under high stress.

Where Is QJ 1272 N2MA Bearing Used?
In wind turbines, QJ 1272 N2MA Bearing supports the main shaft, providing stability and durability in harsh weather conditions. Its chrome steel construction and P6 tolerance class make it reliable for long-term use.

Built for Heavy-Duty Use: QJ 1272 N2MA Bearing
QJ 1272 N2MA Bearing excels in mining equipment, where its large size and high load capacity withstand extreme operational demands. The lubricated design reduces friction, extending the bearing’s service life.

Automotive vs Aerospace: Applications of QJ 1272 N2MA Bearing
In automotive applications, QJ 1272 N2MA Bearing is found in heavy-duty trucks, handling large loads in drivetrain components. For aerospace, its precision and durability make it suitable for landing gear systems.

Practical Applications of QJ 1272 N2MA Bearing
QJ 1272 N2MA Bearing is ideal for construction machinery, such as cranes and excavators, where its robust design ensures performance under heavy loads. The metric dimensions allow for easy integration into various equipment types.

Q&A

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