Double Row Angular Bearing QJZ 5310-2RS 50x110x44.4mm 2-Pack

Description

Product Overview

The QJZ 5310-2RS double row angular contact ball bearing is engineered for demanding power transmission applications where precision, durability, and reliability are paramount. Featuring a double row configuration, this bearing provides superior load distribution and axial rigidity, making it suitable for high‑speed shafts and heavy‑duty machinery. The integrated double rubber seal (2RS) safeguards the internal rolling elements from dust, moisture, and contaminants while retaining lubrication, thereby extending service intervals and reducing maintenance costs.

With an inner diameter of 50 mm, an outer diameter of 110 mm, and a width of 44.4 mm, the bearing offers a compact yet robust footprint that fits a wide range of equipment. Constructed from high‑quality steel, the balls and raceways are heat‑treated for enhanced hardness and wear resistance, ensuring consistent performance even under fluctuating temperatures and harsh operating conditions. The precision‑ground raceways provide smooth rotation with minimal friction, contributing to energy efficiency and lower operating noise.

Usage

This bearing excels in automotive applications such as transmission shafts, differential assemblies, and wheel hubs, where it must endure radial loads and axial thrust simultaneously. In agricultural machinery, it supports the high‑torque demands of combine harvesters, tractors, and planting equipment, delivering reliable operation across varied terrain and load cycles. Construction and heavy‑equipment manufacturers rely on this bearing for cranes, excavators, and concrete mixers, where durability and resistance to shock loads are critical.

Beyond these sectors, the 5310-2RS is ideal for industrial gearboxes, pumps, and compressors that require precise alignment and consistent rotational performance. Its double rubber seal makes it especially valuable in environments exposed to dust, water, or chemical splashes, such as outdoor processing plants or marine applications. The 2‑pack packaging provides a spare unit for quick replacement, minimizing downtime during scheduled maintenance or unexpected bearing failure.

Why Choose Us

Choosing the QJZ 5310-2RS bearing means selecting a product backed by rigorous quality control and industry‑standard testing. Each bearing undergoes dimensional verification, hardness testing, and dynamic load assessment to guarantee conformity with ISO 281 and ABEC standards. Our manufacturing process incorporates advanced CNC machining and precision grinding, ensuring tight tolerances and uniform ball spacing for optimal performance.

We stand behind our bearings with a comprehensive warranty that covers material defects and premature wear under normal operating conditions. Our technical support team is available to assist with installation guidance, bearing selection, and troubleshooting, providing customers with confidence throughout the product lifecycle. Additionally, our streamlined logistics network ensures fast, reliable delivery, so you receive your bearings exactly when you need them.

Key Features

• Double row design delivers high load capacity and axial rigidity for demanding applications
• Double rubber seal (2RS) protects against contaminants and retains lubrication
• Precision‑ground steel raceways ensure smooth, low‑friction rotation
• Compact 50 mm × 110 mm × 44.4 mm size fits a wide range of equipment
• Comes with a 2‑pack for spare parts and reduced downtime

FAQ

What does the 2RS designation mean?

2RS indicates that the bearing has two rubber seals, one on each side, which protect the internal components from dust, moisture, and debris while keeping the lubricant sealed inside.

Can this bearing be used in high‑temperature environments?

Yes, the bearing is made from heat‑treated steel that can operate reliably up to 120 °C (248 °F) when properly lubricated, making it suitable for many industrial and automotive applications.

Is the bearing compatible with standard lubrication methods?

The 5310-2RS bearing is compatible with both grease and oil lubrication. For most applications, a high‑quality lithium‑based grease is recommended to maximize seal life and performance.

What is the recommended preload for this bearing?

Preload should be set according to the manufacturer’s guidelines, typically a light preload to eliminate internal clearance without causing excessive friction. Consult the QJZ technical manual for specific values based on your application.

How do I install the bearing correctly?

Ensure the shaft and housing are clean and free of burrs. Apply a thin layer of lubricant to the inner and outer rings, then press the bearing onto the shaft using a bearing press or appropriate tools to avoid impact damage. Verify alignment before final assembly.