[2-Pack] 5304-2RS – Angular Contact Ball Bearing 0.7874 in x 2.0472 in x 0.875 in (ID x OD x Width) | 20 mm x 52 mm x 22.2 mm (ID x OD x Width) with Double Rubber Seal

Description

Product Overview

The QJZ 5304-2RS angular contact ball bearing is engineered for demanding power transmission applications where precision, durability, and reliability are paramount. Each bearing measures 20 mm (ID) × 52 mm (OD) × 22.2 mm (width), equivalent to 0.7874 in × 2.0472 in × 0.8740 in, and is supplied as a 2‑pack to ensure you have a spare or can service dual‑shaft configurations without delay. The double rubber seal on both sides of the bearing creates a robust barrier against dust, moisture, and other contaminants while maintaining internal lubrication, extending service life and reducing maintenance intervals. Constructed from high‑quality chrome steel balls and hardened raceways, the bearing delivers consistent angular contact performance, allowing it to accommodate combined radial and axial loads with minimal deflection. The precision‑ground raceways and uniform ball spacing provide smooth rotation at high speeds, making the bearing suitable for motors, gearboxes, spindle drives, and other high‑speed machinery. The compact design and standardized dimensions ensure compatibility with a wide range of equipment, while the robust sealing system eliminates the need for additional external seals or lubrication devices. QJZ, a reputable manufacturer in the bearing industry, guarantees that each unit meets stringent quality standards, offering confidence in long‑term operation under harsh industrial conditions.

Usage

The 5304-2RS angular contact bearing excels in environments where precise shaft alignment and high load capacity are required. Typical applications include CNC machine spindles, high‑speed electric motor shafts, precision gearboxes, and aerospace‑grade equipment where axial thrust must be managed alongside radial forces. Its double‑seal configuration makes it ideal for dusty workshop floors, humid manufacturing plants, and outdoor installations where exposure to contaminants is unavoidable. The bearing’s ability to operate at speeds exceeding 10,000 rpm without excessive heat buildup enables its use in high‑performance pumps, compressors, and turbo‑machinery. Engineers often select this bearing for robotic arms and automation systems that demand rapid directional changes and consistent positioning accuracy. The 2‑pack packaging is particularly advantageous for maintenance teams, allowing quick replacement of worn bearings without the need to order additional inventory. Whether installed in a heavy‑duty industrial conveyor, a precision medical device, or a high‑speed printing press, the 5304-2RS provides the stability and longevity required for continuous operation.

Why Choose Us

Choosing the QJZ 5304-2RS bearing means selecting a product backed by decades of engineering expertise and a commitment to quality assurance. Each bearing undergoes rigorous testing for dimensional accuracy, load capacity, and seal integrity, ensuring that it meets or exceeds OEM specifications. The double rubber seal is designed to retain grease for extended periods, reducing the frequency of re‑lubrication and minimizing downtime. QJZ’s manufacturing process incorporates advanced heat‑treatment and surface‑finishing techniques that enhance wear resistance and reduce the risk of premature failure. Our dedicated technical support team is available to assist with installation guidance, troubleshooting, and after‑sales service, providing you with a reliable partner throughout the product lifecycle. Additionally, the 2‑pack configuration offers cost‑effective redundancy, allowing you to keep a spare on hand for rapid field repairs. By selecting this bearing, you benefit from a balance of performance, durability, and comprehensive customer support that distinguishes QJZ in the competitive bearings market.

Key Features

• Double rubber seals protect against dust and moisture, extending bearing life and reducing maintenance.
• High precision angular contact design handles combined radial and axial loads for smooth high‑speed operation.
• Robust chrome steel construction provides excellent wear resistance and long‑term durability.
• Compact 20 mm × 52 mm × 22.2 mm dimensions fit a wide range of industrial equipment.
• Comes in a convenient 2‑pack with dedicated technical support and after‑sales service.

FAQ

What is the maximum operating speed for the 5304-2RS bearing?

The bearing is rated for speeds up to approximately 12,000 rpm, depending on load conditions and proper lubrication.

Can the double rubber seal be replaced if damaged?

Yes, the seals are designed for field replacement. Replacement seals are available from the manufacturer or authorized distributors.

Is this bearing compatible with standard shaft sizes?

The 20 mm inner diameter matches common shaft sizes, and the outer dimensions conform to ISO 15 mm series standards, ensuring broad compatibility.

What warranty does QJZ provide for this bearing?

QJZ offers a one‑year limited warranty covering material and workmanship defects, backed by responsive customer service.

How should the bearing be installed to maintain its seal integrity?

Install the bearing using a calibrated press or mounting tool, ensuring that axial forces are applied evenly and that the seal faces are not damaged during handling.