QJ 326 N2MA

 

Dimensions

d	130 mm	Bore diameter
D	280 mm	Outside diameter
B	58 mm	Width
d1	≈182 mm	Shoulder diameter inner ring
D1	≈227 mm	Shoulder diameter outer ring/ inner diameter housing washer
a	144 mm	Distance pressure point(s)
h	12.7 mm	Locating slot depth outer ring
b	10.5 mm	Locating slot width outer ring
r0	2 mm	Corner radius locating slot
r1,2	min.4 mm	Chamfer dimension inner ring

Abutment dimensions

da	min.147 mm	Abutment diameter shaft
Da	max.263 mm	Abutment diameter housing
ra	max.3 mm	Fillet radius

Calculation data

SKF performance class		SKF Explorer
Basic dynamic load rating	C	455 kN
Basic static load rating	C0	610 kN
Fatigue load limit	Pu	18 kN
Limiting speed		4 000 r/min
Calculation factor	A	1.06
Limiting value	e	0.95
Calculation factor	X	0.6
Calculation factor	Y0	0.58
Calculation factor	Y1	0.66
Calculation factor	Y2	1.07

QJ 326 N2MA Four-Point Contact Ball Bearing: Precision Engineering for Demanding Applications
The QJ 326 N2MA four-point contact ball bearing is engineered to deliver exceptional performance in applications requiring high radial and axial load capacity. Its unique design features a split inner ring and a solid outer ring, enabling it to handle combined loads in both directions simultaneously. The bearing incorporates a nylon cage (N2MA designation) that reduces friction and ensures smooth operation at high speeds. With a 130 mm bore, 280 mm outer diameter, and 58 mm width, this compact yet robust bearing is heat-treated for enhanced durability and resistance to wear. Its four-point contact design minimizes space requirements while maximizing load distribution, making it ideal for machinery where precision and reliability are non-negotiable.

Key Advantages of the QJ 326 N2MA Bearing
Designed for versatility, the QJ 326 N2MA excels in environments with oscillating or rotating motions, such as industrial gearboxes, robotics, and heavy-duty pumps. Its ability to accommodate misalignment and axial displacement reduces stress on adjacent components, extending equipment lifespan. The high-quality steel construction, combined with advanced surface finishing, ensures corrosion resistance and minimal maintenance needs. Additionally, the nylon cage minimizes noise and vibration, making it suitable for applications requiring quiet operation. Pre-lubricated and ready to install, this bearing reduces downtime and operational costs, offering a cost-effective solution for industries ranging from automotive manufacturing to renewable energy systems.

Applications and Industry Use Cases
The QJ 326 N2MA four-point contact ball bearing is widely used in sectors demanding high-speed, high-load performance. Common applications include wind turbine pitch and yaw systems, CNC machine tool spindles, and aerospace actuators. Its compact design and ability to handle bidirectional axial loads make it a preferred choice for compact gear drives in construction equipment and material handling systems. Manufacturers also utilize this bearing in agricultural machinery, where harsh conditions require components to withstand dust, moisture, and temperature fluctuations. With ISO 9001-certified production standards, the QJ 326 N2MA guarantees consistent quality, ensuring seamless integration into both OEM and aftermarket solutions worldwide.

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