LDK Bearings - Professional bearing manufacturer for all kinds of bearing unit since 1986 


What are Zinc Alloy Small Pillow Blocks Used For?

Pillow blocks are an integral component in a wide range of mechanical and engineering applications. They act as a housing to provide support for rotating shafts, while allowing rotational movement and reducing friction. Zinc alloy small pillow blocks are a popular choice for many industrial settings due to their durability, corrosion resistance, and ability to withstand heavy loads and high temperatures. This article provides an overview of zinc alloy small pillow blocks, exploring their key properties, industrial applications, installation considerations, and comparisons to other pillow block materials. The purpose is to demonstrate the versatility and benefits of utilizing zinc alloy small pillow blocks.


Overview of Zinc Alloy Small Pillow Blocks


Zinc alloy small pillow blocks are bearing housing units designed to contain and support bearings for rotating shafts. The pillow block is typically constructed of die cast zinc alloy, which provides strength and durability combined with resistance to corrosion. The size of the pillow block body is smaller than standard sized units, with mounting holes spaced closely together. This compact size allows them to be used where space is limited. The zinc alloy material offers good load bearing capacity and shock absorption. It can withstand high temperatures up to 300°F while maintaining dimensional stability. Zinc alloy small pillow blocks are an affordable option that suits light to medium duty applications.


Industrial Applications of Zinc Alloy Small Pillow Blocks


Zinc alloy small pillow blocks have many industrial uses across manufacturing, agriculture, automation, and other fields. In manufacturing, they are commonly found in conveyor systems, machine tools, packaging equipment, and assembly line parts. For example, small pillow blocks support drive shafts on belt conveyors for moving products and materials. In agricultural equipment, zinc alloy small pillow blocks provide rotational support for components like spindles, pulleys, and cutting blades. They are also widely used in automation, robotics, and other engineered systems to provide smooth rotation and alignment for motors, actuators, and drivetrain elements. Compared to large heavy-duty pillow block units, the compact size of zinc alloy small pillow blocks allows them to fit into tight spaces within machinery and equipment. Their corrosion resistance suits wet environments and exposure to chemicals.


Advantages and Benefits of Zinc Alloy Small Pillow Blocks


There are several notable advantages to selecting zinc alloy small pillow blocks for mechanical applications:


- Durability - The zinc alloy material is impact-resistant and can handle repetitive stress. The compact housing design provides stability under load.


- Corrosion Resistance - Zinc alloy provides excellent corrosion resistance, outperforming steel. This allows use in wet conditions.


- High Load Capacity - Pound for pound, zinc alloy provides very good load bearing strength thanks to its molecular structure.


- Temperature Resistance - Capable of operating steadily at temperatures up to 300°F. Dimensional stability is maintained.


- Low Maintenance - Compared to other metals, zinc alloy offers lower maintenance needs given its corrosion protection.


- Cost Effectiveness - More affordable than stainless steel or bronze pillow blocks while providing comparable performance for light to medium-duty uses.


By utilizing zinc alloy small pillow blocks, engineers can optimize the service life, performance, and cost-effectiveness of mechanical equipment and machinery. The right sizing and material choice contributes to improved efficiency and productivity across industrial facilities.


Installation and Maintenance of Zinc Alloy Small Pillow Blocks


Proper installation is key to maximizing the performance and longevity of zinc alloy small pillow blocks. Engineers should follow manufacturer specifications for appropriate mounting, alignment, load capacities, and rotational speeds. Proper lubrication practices must also be implemented. For shaft mounting, the shaft shoulder should fully contact the base of the bearing and be secured with the locknut. A dial indicator can verify parallel and perpendicular alignment during installation. Regular lubrication will be required using the recommended grease or oil for the application's environment and operating conditions. Set schedules should be followed for re-lubrication. Periodic inspection of the housing, fasteners, and shaft integrity is advised. By installing and maintaining zinc alloy small pillow blocks as directed, optimal operational service can be achieved.


Comparisons with Other Types of Pillow Blocks


While zinc alloy is a popular choice, pillow blocks are also fabricated from cast iron, ductile iron, steel, stainless steel, and plastic. Compared to steel and cast iron, zinc alloy pillow blocks are more affordable, offer better corrosion resistance, and are well-suited to medium loads. Ductile iron provides higher load capacity but is considerably heavier. Plastic blocks are very lightweight but cannot match the load ratings of metal units. Stainless steel excels in harsh corrosive environments but is costlier. For most general purpose applications, zinc alloy small pillow blocks offer the best balance of strength, corrosion protection, low maintenance needs, and value. Engineers should carefully assess operational requirements when selecting materials.


Safety Considerations and Precautions


There are some safety guidelines that should be followed when utilizing zinc alloy small pillow blocks:


- Never exceed the recommended loads, speeds, or torque for the pillow block rating. This can cause hazardous failure.


- Ensure proper alignment during installation to prevent unusual stress.


- Keep body parts, clothing, and tools away from rotating shafts and components supported by the pillow blocks.


- Wear eye protection when installing, removing, or performing maintenance.


- Allow only qualified personnel to install or service pillow block applications.


- Follow all recommended procedures from manufacturers.


- Never operate equipment with missing or damaged pillow block units.


Adhering to safety precautions and installation best practices will optimize performance while protecting workers and equipment.




Zinc alloy small pillow blocks play an important role in supporting rotating shafts across many vital industries. Their compact durable construction, corrosion resistance, temperature endurance, and medium load capacity deliver reliable service for manufacturing, agriculture, automation, and other fields. Proper installation and maintenance are needed to unlock their full potential. Engineers should evaluate operational requirements and utilize manufacturer guidance in selecting zinc alloy versus other pillow block materials. By leveraging the strengths of zinc alloy small pillow blocks, industrial applications can benefit from enhanced safety, efficiency, and productivity.


At Deyuan Smart Technology, we take great pride in the recognition our product quality and services have garnered from customers in the industry. We strive to provide exceptional products and services that meet and exceed customer expectations. You can trust us as your reliable partner in the pillow blocks industry. For further inquiries or to discuss your specific requirements, please contact kzhang@ldk-bearings.com or call +86-592-580 7618. We look forward to the opportunity to work with you.



[1] Lee, Kunsei. (2017). Pillow Blocks: An Overview of Functions and Uses. Journal of Mechanical Science and Applications. 134(3).

[2] Singh, R.K., et. al. (2020). Metallurgy and Mechanical Properties of Zinc Alloys. International Zinc Association.

[3] Rockwell Automation. (2022). What is a Pillow Block? Accelerating Industrial Automation.

[4] Polytech. (2021). Installation and Maintenance Guidelines for Pillow Block Units. Polytech Design Data Guide.

[5] MatWeb, LLC. (2023). Zinc Alloys. Material Property Data.

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