RAS Bearings
Premium Pillow Block Bearings
What is a Pillow Block Bearing?
A pillow block bearing, also known as a plummer block or bearing housing, is a pedestal used to provide stable support for a rotating shaft. It consists of a ball bearing, seal and housing made of high-grade cast iron or cast steel.
At RAS Bearings, we manufacture IATF 16949:2016 compliant pillow block bearings designed to handle axial, radial and composite loads. The outer diameter of the bearing and internal housing surface are spherical in shape, which helps accommodate misalignment and ensures smooth functioning.
The primary function of bearing housings is to safely mount bearings, keeping the outer ring stationary while allowing the inner ring to rotate freely. The housing is bolted to a foundation through base holes and can be either split type or unsplit type. Split housings are typically two-piece designs with a detachable cap and base, while certain series are made as a single solid unit. To ensure reliability, various seals are used to keep out dust and contaminants, creating a clean environment that enhances bearing performance and extends service life.
Pillow blocks are housings that come with bearings already fitted, eliminating the need for users to purchase them separately. They are commonly used in cleaner environments and are designed for lighter loads in general industrial applications. In contrast, plummer blocks are housings supplied without bearings, typically intended for heavier loads and harsher environments. While pillow blocks and plummer blocks serve different purposes, the terms are often used interchangeably in different regions.
Pillow Block Bearing Sizes & Range
RAS Bearings offers a wide range of pillow block bearing sizes to suit different shaft diameters and applications.
| Range: (d) 10 mm to 100 mm | |
|---|---|
| Prefix (Housing Shape) | Suffix (Boundary Dimension) |
| UCP/UCF/UCT/UCFC/UCFL | 204 to 220 |
| UCP/UCF/UCT | 304 to 320 |
This wide availability ensures compatibility across light-duty, medium-duty and heavy-duty machinery.
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Construction & Design of Pillow Block Bearings
RAS pillow block bearings are engineered for strength and durability.
- Ball Bearing Unit – The internal design is similar to a ball bearing, offering smooth rotation.
- Cast Iron Housing – Provides rigid support and protection in demanding environments.
- Contact-Type Seals – Our units come with seals on both sides for effective protection.
- Triple Lip Seal System – A unique design that includes a metal cap, synthetic rubber seal and an extra lip seal, ensuring outstanding performance even in harsh operating conditions.
Pillow Block Bearing Applications
RAS pillow block bearings are widely used in general industry as well as heavy-duty sectors.
Common Applications:
Textile Machinery
Smooth functioning of rollers.
Food Processing
Hygienic and dust-protected designs.
Automotive & Conveyors
Continuous and reliable shaft support.
Steel, Mining & Cement Plants
Rugged designs for extreme loads.
Fans, Blowers & Pumps
Stable support for rotating shafts.
What Are Pillow Block Bearings Used For?
In simple words, pillow block bearings are used to support rotating shafts while keeping the outer ring stationary. They are essential in:
- Ensuring smoother machine operation
- Reducing wear and tear
- Enhancing duty cycle and equipment lifespan
While pillow blocks are generally preferred for cleaner environments and lighter loads, plummer blocks are suited for heavier loads and corrosive environments. However, both terms are often used interchangeably.
How to Align Pillow Block Bearings
For the best pillow block bearing performance, proper alignment is key.
- Clean the shaft and housing before installation.
- Place the pillow block housing on the base and align it correctly.
- Tighten bolts evenly to avoid misalignment.
- Rotate the shaft manually to check for smoothness.
- Apply recommended lubrication to improve performance and life.
Why Choose RAS Bearings for Pillow Block Bearings?
Trusted Supplier
We serve industries such as steel, cement, mining, agriculture and textiles, delivering reliable pillow block bearings for both OEMs and maintenance teams. Our supply network ensures fast and consistent availability.
Proven Expertise
With decades of experience and a deep understanding of Indian operating conditions, our engineers recommend pillow block solutions that maximise load capacity, performance and service life even in tough environments.
Technical Support & Training
From bearing selection and sizing to alignment, lubrication and maintenance tips, our technical team guides you every step of the way. We also provide on-site and remote training to ensure long-term reliability.
Reliable Sourcing
Every RAS pillow block bearing is manufactured from premium raw materials under strict quality processes. Each unit is supplied with GST invoicing, certification and batch traceability, giving you complete confidence in authenticity.
Quality Systems & Traceability
All RAS bearings are produced under IATF 16949:2016 aligned processes, ensuring consistent quality, durability and compliance with international standards. Our sealing systems are tested to perform even under challenging conditions.
Custom Solutions
Every industry has unique requirements. That’s why we offer special housings, advanced triple lip sealing systems, high-temperature pillow block designs and tailored bearing solutions engineered for your specific applications.
The Best Pillow Block Bearing Exporters
RAS Bearings is a trusted name in the industry, known for delivering high-quality pillow block bearings engineered with precision and durability. Our extensive product catalogue is backed by advanced design and manufacturing expertise, ensuring reliable performance across diverse applications. We also provide technical support and guidance to help customers select the right bearing solutions for their specific requirements. When it comes to sourcing pillow block bearings, RAS Bearings is the dependable choice worldwide.
Get the Best Pillow Block Bearings Today
Choose RAS Bearings for durable, high-performance pillow block bearings trusted across Indian industries.
FAQs on Pillow Block Bearings
What is the range of pillow block bearing sizes available at RAS Bearings?
Our bearings fit shaft diameters from 10 mm to 100 mm, covering multiple housing series like 204–220 and 304–320.
How to align pillow block bearings?
Clean the shaft and housing, place the bearing properly, tighten bolts evenly, check smooth rotation and lubricate regularly for best results.
What is the difference between pillow block and plummer block bearings?
Pillow blocks are used in lighter, cleaner environments, while plummer blocks are stronger and used for heavier loads and tougher conditions.
How long do pillow block bearings last?
With proper installation, alignment and lubrication, pillow block bearings can last several years, even under continuous operation. Their lifespan depends on load, speed and environment.
Can pillow block bearings handle misalignment?
Yes. Since the housing is spherical inside, pillow block bearings can adjust to slight shaft misalignments without reducing performance.