QJ252-N2-MPA

d	260 mm	Bore diameter
D	480 mm	Outside diameter
B	80 mm	Width
Cr	840,000 N	Basic dynamic load rating, radial
C0r	1,630,000 N	Basic static load rating, radial
Cur	47,000 N	Fatigue load limit, radial
nG	2,320 1/min	Limiting speed
nϑr	1,080 1/min	Reference speed
≈m	69.2 kg	Weight

Mounting dimensions

da min	280 mm	Minimum diameter shaft shoulder
Da max	460 mm	Maximum diameter of housing shoulder
ra max	4 mm	Maximum fillet radius

Dimensions

rmin	5 mm	Minimum chamfer dimension
D1	401.8 mm	Shoulder diameter outer ring
d1	338.4 mm	Shoulder diameter inner ring
a	259.1 mm	Distance between the apexes of the pressure cones
an	15 mm	Hight retaining slot
bn	12.5 mm	Width retaining slot
rn	2.5 mm	Radius retaining slot
	45 °	Angle retaining slot
α	35 °	Contact angle

Temperature range

Tmin	-30 °C	Operating temperature min.
Tmax	200 °C	Operating temperature max.

The QJ252-N2-MPA four-point contact ball bearing is a highly versatile mechanical component known for its exceptional load-carrying capacity and structural integrity. One of its most notable features is the design that allows for four-point contact with the raceways, enabling it to accommodate radial and axial loads simultaneously. This unique configuration not only enhances its load distribution but also minimizes the friction generated during operation, thus promoting greater efficiency and longevity.

One of the primary advantages of the QJ252-N2-MPA bearing is its ability to support combined loading conditions. This characteristic is particularly beneficial in applications where both radial and axial forces act on the bearing. The four-point contact design ensures that the loads are evenly distributed across the rolling elements, which reduces wear and increases the service life, making it an ideal choice for demanding environments.

The QJ252-N2-MPA bearing is also engineered for high angular reliability. This feature allows it to maintain performance even under misalignment or deflection conditions, which is common in many industrial applications. Its design incorporates a robust cage, which aids in optimal rolling element spacing, further enhancing its operational stability. This reliability makes it suitable for applications in high-speed machinery, automotive components, and precision instruments where stable performance is paramount.

Furthermore, the QJ252-N2-MPA is relatively easy to install and can be paired with various shaft and housing designs, providing flexibility in design considerations. This adaptability makes it suitable for a wide range of applications across multiple industries, including aerospace, automotive, and manufacturing. Its ability to operate effectively in both low-speed and high-speed scenarios broadens its utility, being able to transition seamlessly between different operating conditions without compromising performance.

Another significant advantage of this bearing type is its maintenance-friendly design. It often comes with the capability for re-lubrication or the option of sealed maintenance, allowing users to increase its lifespan without extensive downtime. This ease of maintenance appeals to industries where operational efficiency and uptime are critical.

In terms of material, the QJ252-N2-MPA is typically constructed from high-quality bearing steel, providing excellent resistance to wear and fatigue, while also exhibiting good performance under varying temperatures and environmental conditions. This resilience is vital for components operating in harsh environments, where dirt, moisture, and other contaminants could threaten performance.

The applications of the QJ252-N2-MPA bearing are vast and varied. In the automotive sector, it is commonly used in gearboxes, wheel hubs, and steering systems, where reliable performance and load handling are essential. In industrial machinery, it plays a crucial role in conveyor systems, pumps, and motors, helping to streamline operations and enhance productivity. Meanwhile, in aerospace applications, its capability to handle high-speed rotations and provide stability under varying loads makes it a preferred choice for aircraft components.

In conclusion, the QJ252-N2-MPA four-point contact ball bearing combines innovative design with robust performance characteristics, making it a vital component in numerous industrial applications. Its ability to handle combined loads, reliability under misalignment, ease of maintenance, and adaptability to various conditions solidify its position as a key player in the engineering and manufacturing industries. As technology advances and demands for efficiency increase, the QJ252-N2-MPA bearing is poised to continue to be a valuable asset across diverse applications.

NO.	d[mm]	D[mm]	B[mm]
QJ1252-N2-MPA-C3	260	480	90
QJ252-N2-MPA	260	480	80
QJ252-N2-MPA-C3	260	480	80
QJ1252-N2-MPA	260	480	90
QJ1972-N2-MPA	360	480	56
QJ344-N2-MPA	220	460	88
QJ344-N2-MPA-C3	220	460	88
QJ1060-MPA	300	460	74
QJ1060-N2-MPA-C3	300	460	74
QJ1060-N2-MPA	300	460	74
QJ1248-N2-MPA	240	440	85
QJ1248-MPA	240	440	85
QJ248-N2-MPA	240	440	72
QJ248-N2-MPA-C3	240	440	72
QJ340-N2-MPA	200	420	80
QJ1056-MPA	280	420	65
QJ340-N2-MPA-C3	200	420	80
QJ1056-N2-MPA	280	420	65
QJ1056-N2-MPA-C4	280	420	65
QJ244-N2-MPA	220	400	65

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