S V Hi-Tech Bearing (India) Private Limited

A pillow block bearing (or plummer block) is a pedestal used to provide support for a rotating shaft with the help of compatible bearings and various accessories. The assembly consists of a mounting block which houses a bearing.^[1] The block is mounted to a foundation and a shaft is inserted allowing the inner part of the bearing / shaft to rotate.^[1] The inside of the bearing is typically 0.001 inches (0.025 mm) larger than the shaft to ensure a tight fit.^[2] Set screws, locking collars, or set collars are commonly used to secure the shaft.^[2] Housing material for a pillow block is typically made of cast iron^[1] or cast steel.

A pillow block usually refers to a housing with an included anti-friction bearing, wherein the mounted shaft is in a parallel plane to the mounting surface, and perpendicular to the center line of the mounting holes, as contrasted with various types of flange blocks or flange units. A pillow block may contain a bearing with one of several types of rolling elements, including ball, cylindrical roller, spherical roller, tapered roller, or metallic or synthetic bushing.^[1] The type of rolling element defines the type of pillow block. These differ from "plummer blocks" which are bearing housings supplied without any bearings and are usually meant for higher load ratings and a separately installed bearing.^[1] Plummer block bearings are designed for more corrosive environments.^[1]

The fundamental application of both types is the same, which is to mount a bearing safely enabling its outer ring to be stationary while allowing rotation of the inner ring. The housing is bolted to a foundation through the holes in the base. Bearing housings may be either split type or solid type.^[1] Split type housings are usually two-piece housings where the cap and base may be detached,^[1] while solid are single-piece housings.^[1] Various sealing arrangements may be provided to prevent dust and other contaminants from entering the housing. Thus the housing provides a clean environment for the environmentally sensitive bearing to rotate free from contaminants while also retaining lubrication, either oil or grease, hence increasing its performance and duty cycle.

Bearing housings are usually made of grey cast iron.^[1] However, various grades of metals can be used to manufacture the same, including ductile iron, steel, stainless steel, and various types of thermoplastics and polyethylene-based plastics. The bearing element may be manufactured from 52100 chromium steel alloy (the most common), stainless steel, plastic, or bushing materials such as SAE660 cast bronze, or SAE841 oil impregnated sintered bronze, or synthetic materials.

Other details:

• Brand: Masta
• Model: SNA 520

Benefits:

• Split Plummer block design allows for easy mounting and dismounting of pre-assembled shafts
• Sealing options offers a range of sealing options including V-ring seals, labyrinth seals or heavy-duty taconite seals
• Case end covers available
• Multi republication points are provided to ensure re-lubrication of the bearing depending on orientation
• Housing is supplied with spacer rings in order to provide axial location. Those can be omitted for "free end" axial front
• Plummer Blocks include: spherical roller bearings, locknuts, adapter sleeves, locking washers, etc

SKF pillow (plummer) block ball bearing units consist of an insert bearing mounted in a housing, which can be bolted to a support surface. The SKF assortment includes units compliant with ISO standards, North American standards, or Japanese Industrial Standards (JIS). Within the SKF assortment, you can find units for nearly all requirements. 

In addition, SKF Food Line ball bearing units provide hygienic and high-performance bearing unit solutions for the most demanding food and beverage environments

Unsplit plummer block housings are used in applications that place extremely high demands on bearings. Unlike split plummer block housings, which allow the upper part of the housing to be removed for easier assembly and maintenance, unsplit plummer block housings do not have this feature. They are typically made from cast iron, though they can also be made from cast steel or spheroidal graphite cast iron by agreement. These housings generally do not have relubrication holes since the bearings are usually lubricated with grease that lasts for a long period. However, there are cast-on bosses or marks present so that lubrication holes can be made if necessary

Y bearing plummer block units, also known as pillow block bearings, are pre-engineered, ready-to-mount bearing units consisting of a bearing (usually a deep groove ball bearing) and a housing. These units are designed to be bolted onto a support surface, providing a convenient and standardized way to mount a bearing. 

Split pillow block housings are versatile components designed to support rotating shafts in various machinery. They consist of a housing and a bearing insert that can be easily replaced, allowing for simple maintenance and reducing downtime during repairs.

These housings are typically made from heavy-duty materials such as cast iron, cast steel, or ductile iron, providing durability and strength.

 They are available in split designs, which enable the bearing to be fixed on the shaft before installation, making them ideal for applications where maintenance access is critical.

Trunnion bearing housings are critical components used in various industrial and agricultural applications. They are designed to support and facilitate the rotation of heavy machinery such as mill rotary bodies and trunnion wheels, ensuring smooth operation and longevity of the equipment.

These housings are typically made from materials like alloy steel, carbon steel, stainless steel, high manganese steel, high chromium iron, ductile iron, gray iron, and resistance cast iron, adhering to standards such as ASTM, AISI, ASME, SAE, NF EN, DIN, ISO, BS EN, and SS.

Two-bearing housings are designed for applications with an overhanging load and provide several advantages over conventional shaft arrangements. They have intrinsically aligned bearing seats, which enable the use of rigid bearings such as deep groove ball bearings, angular contact ball bearings, and cylindrical roller bearings, leading to improved running accuracy and quieter operation.

Y-bearing take-up units are designed to accommodate shaft adjustment and belt tightening in applications such as conveyor systems and food processing environments. These units consist of a sealed ball bearing mounted in a housing, typically made of cast iron or steel, and are lubricated for life with a food-grade grease filling. They can compensate for misalignments due to their static pendulum function between the housing and bearing, allowing for easy mounting onto a shaft.

Flanged Y-bearing units are a type of bearing unit designed for easy installation and maintenance. These units consist of a Y-bearing, which is a deep-groove ball bearing with a spherical outer shell, and a flanged housing that also has a spherically hollow bore. The flanged design allows for secure mounting on surfaces, and the spherical shape of both the bearing and the housing enables compensation for misalignments during assembly or installation.

Metric roller bearing housings are designed to accommodate roller bearings in metric sizes. These housings are crucial for ensuring that the bearings fit properly and function efficiently within machinery. They provide a stable and secure mounting point for the bearings, allowing for smooth rotational motion and the distribution of loads.

Non-split plummer block housings are designed to accommodate heavy loads acting not only perpendicularly but also in other directions. They are typically used in applications that require high demands on bearings and are suitable for rugged industrial environments with tough environmental conditions.

These housings are often made of cast iron and can be equipped with sealed spherical roller bearings. They are capable of withstanding shaft misalignment up to 0.5° and are used in various industries, including agricultural machinery.