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Four-Point Contact Angular Contact Ball Bearings (General) QJ 212 MA
Four-Point Contact Angular Contact Ball Bearings (General) QJ 212 MA

Four-Point Contact Angular Contact Ball Bearings (General) QJ 212 MA

The QJ 212 MA is a four-point contact angular contact ball bearing with a 60mm bore and 110mm outer diameter, crafted from sturdy chrome steel. It manages radial loads up to 21712 lbf and operates smoothly at speeds up to 10000 RPM.
Its open design and brass cage ensure durability and easy maintenance, while the single-row construction provides reliable performance. The bearing works efficiently 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 applications like gearboxes or industrial machinery where radial and axial loads are present.
Weighing 0.99kg, it offers a robust yet manageable size. Compliant with RoHS and REACH standards for safe and eco-friendly use.

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Product Parameters

  • Part Number QJ 212 MA
  • 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 60 mm
  • Bore Dia Tolerance -0.012mm to 0
  • Outer Dia 110 mm
  • Outer Dia Tolerance -0.013mm to 0
  • Width 22 mm
  • Width Tolerance -0.05mm to 0
  • External Diameter On Inner Ring (Large Side Face) 72 mm
  • Internal Diameter On Outer Ring 93 mm
  • Chamfer Dimension 1.5 mm
  • Distance Pressure Point (a) 60 mm
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Brass
  • Dynamic Radial Load 21712 lbf
  • Static Radial Load 20925 lbf
  • Max Speed 10000 rpm
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Tolerance Class P6 (ABEC-3)
  • ROHS Compliant
  • REACH Compliant
  • Weight 0.99 kg

Features

How Does QJ 212 MA Bearing Reduce Friction?

QJ 212 MA Bearing features a four-point contact design, distributing loads evenly to minimise friction.
Its chrome steel rings and balls ensure smooth operation, even under high radial loads of up to 21,712 lbf.
The brass cage maintains proper ball alignment, reducing wear and enhancing efficiency.
With a maximum speed of 10,000 rpm, it delivers reliable performance in demanding applications.

Application

Industrial Uses of QJ 212 MA Bearing
QJ 212 MA Bearing is commonly used in machine tools, where its four-point contact design handles combined radial and axial loads efficiently. The open seal type simplifies lubrication, making it suitable for high-speed operations.

In automotive applications, QJ 212 MA Bearing supports gearbox systems, ensuring smooth power transmission under varying loads. Its brass cage enhances durability, even in demanding driving conditions.

For robotics, QJ 212 MA Bearing’s precision construction makes it ideal for articulated arms and rotating joints. The P6 tolerance class ensures reliable performance in automated systems.

Where Is QJ 212 MA Bearing Used?
You’ll find QJ 212 MA Bearing in conveyor systems, where its robust design manages heavy loads with ease. The chrome steel rings provide long-lasting wear resistance in industrial settings.

In medical imaging devices, QJ 212 MA Bearing offers quiet and precise rotation. Its lubricated design ensures consistent performance during prolonged use.

Built for Heavy-Duty Use: QJ 212 MA Bearing
QJ 212 MA Bearing excels in construction equipment, handling harsh conditions with its durable chrome steel components. The brass cage adds stability under heavy vibrations.

For 3D printers, QJ 212 MA Bearing’s precision ensures accurate movement of print heads. Its compact size fits well in tight spaces without compromising performance.

Automotive vs Aerospace: Applications of QJ 212 MA Bearing
In cars, QJ 212 MA Bearing supports steering columns, providing smooth rotation. Its metric sizing aligns with standard automotive designs.

Aerospace applications benefit from QJ 212 MA Bearing’s ability to handle high speeds and loads. The temperature range suits both ground and flight conditions.

Q&A

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