Spherical Roller Bearing 21304CA/W33 20x52x15mm HZ

Description

Product Overview

The HZ 21304CA/W33 spherical roller bearing is engineered to meet the demanding requirements of modern industrial machinery. With an inner diameter of 20 mm, an outer diameter of 52 mm, and a width of 15 mm, this bearing provides a compact yet powerful solution for a wide range of applications. Constructed from high‑grade steel, the rollers are designed to accommodate misalignment and absorb shock loads, ensuring consistent performance even under fluctuating operating conditions. The bearing is rated for a maximum speed of 6000 rpm under oil lubrication and 7500 rpm under grease lubrication, delivering a load capacity of up to 31.2 kN radial and 30.8 kN axial. Its self‑aligning design reduces the need for precise shaft alignment, simplifying installation and reducing maintenance costs. The lightweight construction (0.175 kg) contributes to lower inertia, making it suitable for high‑speed gearboxes, reduction gears, and other power transmission systems.

Usage

This spherical roller bearing excels in environments where reliability and durability are paramount. It is commonly employed in paper‑making machinery, where continuous operation and resistance to contamination are critical. The bearing also performs exceptionally well in printing presses, woodworking equipment, and crushing or vibrating screen machines. Its ability to tolerate shaft misalignment makes it a preferred choice for railway vehicle axles and rolling‑mill gearboxes, where dynamic loads and thermal expansion can cause alignment shifts. In addition, the bearing’s robust design allows it to withstand harsh industrial conditions, including exposure to dust, moisture, and temperature variations. Proper lubrication and sealing are essential to maintain optimal performance and to prevent ingress of contaminants that could degrade the bearing’s lifespan.

Why Choose Us

Choosing the HZ 21304CA/W33 bearing means selecting a product backed by rigorous quality control and a reputation for engineering excellence. Each bearing undergoes comprehensive testing for dimensional accuracy, load capacity, and speed performance, ensuring that it meets or exceeds industry standards. Our manufacturing process incorporates precision forging and heat‑treatment techniques that enhance material hardness and fatigue resistance. In addition to the technical advantages, we provide 24‑hour customer support to assist with installation guidance, troubleshooting, and after‑sales service. Our commitment to sustainability is reflected in the use of recyclable materials and energy‑efficient production methods. By partnering with us, you gain access to a reliable supply chain, detailed technical documentation, and the confidence that your equipment will operate smoothly for years to come.

Key Features

• Self‑aligning design reduces installation time and eliminates the need for precise shaft alignment.
• High load capacity supports heavy‑duty applications such as rolling mills and railway axles.
• Robust steel construction provides excellent durability and resistance to wear.
• Wide operating speed range (up to 7500 rpm) accommodates both oil and grease lubrication methods.
• 24‑hour customer service ensures prompt assistance and reliable after‑sales support.

FAQ

What lubrication method is recommended for this bearing?

The bearing can operate with either oil or grease lubrication. For high‑speed applications up to 6000 rpm, oil lubrication is preferred, while grease is suitable for lower speeds and environments where oil leakage must be minimized.

Can this bearing be used in dusty or dirty environments?

Yes, but it is essential to use proper sealing solutions to prevent dust and contaminants from entering the bearing interior. Sealed versions are available for applications with high exposure to particulate matter.

What is the expected service life of the bearing under normal operating conditions?

When correctly lubricated and maintained, the bearing typically provides a service life of several years, depending on load, speed, and environmental factors. Regular inspection and timely re‑lubrication will extend its operational lifespan.

Is the bearing compatible with standard shaft sizes?

The 20 mm inner diameter fits standard shafts of the same size. If a different shaft size is required, adapters or custom sleeves can be used to ensure a secure fit.

How does the self‑aligning feature benefit my equipment?

The self‑aligning rollers accommodate angular misalignment between the shaft and housing, reducing stress on the bearing and surrounding components. This leads to smoother operation, lower vibration, and reduced wear, ultimately decreasing maintenance costs.