Pillow block bearings, also known as Plummer block bearings, are installed bearings that help to support the load on a spinning shaft. Their mounting surface is parallel to and offset from the shaft's axis. Pillow block bearings have mounting holes or slots in the base or feet that allow for easy adjustment and attachment. In this article, you will get to know the bearing types, bearings specifications, and how to select the Plummer block bearings, a Plummer block buying guide.

 

Bearing Types 

 

A pillow block bearing consists of two parts: a housing and a bearing. A replacement bearing, known as an insert bearing, is found in several pillow blocks. Self-aligning bearings are commonly utilized with pillow block housings to correct for angular misalignments. Pillow blocks come with a variety of bearing options, including:

 

Plain Bearings 

 

In linear applications, plain bearings are used to limit, guide, or minimize friction. Instead of the rolling movement employed by ball, roller, and needle bearings, they use a sliding action. Plain bearings are made of a variety of materials, but the most common are bronze, graphite-metal alloys, and plastic. To decrease wear and friction, metal simple pillow block bearings must be adequately greased. Plain bronze bearings can be impregnated with oil or self-lubricating.

 

Ball Bearings 

 

The rolling element of a ball bearing is a ball. They're employed in rotary applications to create a smooth, low-friction motion. An inner and outer ring, balls, and frequently a cage or ball separator make up the construction. Inner and outer rings, as well as balls, are used in ball pillow block bearings. They may include a cage or a ball separator.

 

Roller Bearings 

 

The rolling element of a roller bearing is a roller. They're employed in rotary applications to create a smooth, low-friction motion. An inner and outer ring, rollers, and, in most cases, a cage or roller separator make up the construction.

 

Bearing Housing Variations 

 

Heavy-duty applications, such as those found in the manufacturing, mining, and construction industries, require reinforced Plummer block housings.

 

For convenient bearing replacement and inspection, split bearing housings are totally split to the shaft.

 

Bearing Specifications

 

Pillow block bearings are chosen based on the following criteria:

 

Shaft Diameter - The diameter of the bearing unit must correspond to the bore measurements of the bearing unit. Pillow block bearings of the proper size glide easily onto the shaft and into place, ready to be fastened by the locking device.

 

Shaft Height - The distance between the base of a pillow block bearing and the center of the shaft is used to define the shaft height or backing height.

 

Shaft Size - The shaft's maximum diameter or the mounted bearing's bore size.

 

Maximum Speed - The maximum permitted shaft speed for which the bearing was designed to work.

 

Maximum Load - The maximum permitted radial load for bearings that can only accept radial loads or the dynamic load capacity for bearings that can take both radial and thrust loads. The load rating is affected by shaft speed. For load ratings at various shaft speeds, check with the manufacturer.

 

Material Selection 

 

Housing Material 

 

The bearing housing covers the bearings while they are in use and also provides a method to secure the bearing when it is in use. Pillow block housing can be manufactured out of a variety of materials, each with its own set of characteristics.

 

Aluminum - has a good load-bearing capacity, fatigue resistance, and thermal conductivity.

 

Cast Iron - refers to a group of materials that are primarily made up of iron, with traces of carbon and silicon. Cast irons are natural composite materials whose microstructures - the stable and metastable phases generated during solidification or subsequent heat treatment - define their qualities.

 

Pressed Steel - It's a low-carbon steel that's been pressed instead of machined. For lesser load-carrying applications, pressed steel pillow blocks are less expensive than cast or machined steel pillow blocks.

 

Plastic - refers to a variety of organic, synthetic, or processed materials that are generally high molecular weight thermoplastic or thermosetting polymers that can be formed into objects, films, or filaments. Acetal, Nylon / Polyamide, and PTFE / Teflon are all common plastic materials.

 

Stainless Steel - is chemically and corrosion-resistant, and can withstand high pressures.

 

Bearing Material 

 

The material used to manufacture the bearing has a considerable impact on the bearing unit's performance.

 

Steel - is a commercial iron that incorporates carbon as an essential alloying ingredient in any level up to roughly 1.7 percent. It is malleable under the right conditions, and it differs from cast iron in that it is malleable and has a reduced carbon concentration. High carbon steel, such as 52100, is commonly used in bearings.

 

Sintered Steel - Powdered-metal bearings are another name for them. They are self-lubricating, easy to use, and inexpensive. These porous bronze and copper alloys can be treated with oil, graphite, or PTFE to make them more durable. They are not recommended for severely loaded applications, although they are useful in situations where lubrication is difficult.

 

Graphite Metal - alloy is an alloy made of molten graphite and metal with a bearing surface. This material is lubricating on its own.

 

Plastic - refers to a variety of organic, synthetic, or processed materials that are typically high molecular weight thermoplastic or thermosetting polymers and can be formed into objects, films, or filaments. They don't need to be lubricated, and their exceptional strength makes them suitable for a wide range of applications. Acetal, Nylon / Polyamide, and PTFE / Teflon are all common plastic materials.

 

So, above are the points you keep in mind while selecting the best Plummer block bearing for your application. EIBC is the best Plummer block supplier in India, For more information on Plummer block bearings, you can contact us. 

Pillow block bearings, also known as Plummer block bearings, are installed bearings that help to support the load on a spinning shaft. Their mounting surface is parallel to and offset from the shaft's axis. Pillow block bearings have mounting holes or slots in the base or feet that allow for easy adjustment and attachment. In this article, you will get to know the bearing types, bearings specifications, and how to select the Plummer block bearings, a Plummer block buying guide.

 

Bearing Types 

 

A pillow block bearing consists of two parts: a housing and a bearing. A replacement bearing, known as an insert bearing, is found in several pillow blocks. Self-aligning bearings are commonly utilized with pillow block housings to correct for angular misalignments. Pillow blocks come with a variety of bearing options, including:

 

Plain Bearings 

 

In linear applications, plain bearings are used to limit, guide, or minimize friction. Instead of the rolling movement employed by ball, roller, and needle bearings, they use a sliding action. Plain bearings are made of a variety of materials, but the most common are bronze, graphite-metal alloys, and plastic. To decrease wear and friction, metal simple pillow block bearings must be adequately greased. Plain bronze bearings can be impregnated with oil or self-lubricating.

 

Ball Bearings 

 

The rolling element of a ball bearing is a ball. They're employed in rotary applications to create a smooth, low-friction motion. An inner and outer ring, balls, and frequently a cage or ball separator make up the construction. Inner and outer rings, as well as balls, are used in ball pillow block bearings. They may include a cage or a ball separator.

 

Roller Bearings 

 

The rolling element of a roller bearing is a roller. They're employed in rotary applications to create a smooth, low-friction motion. An inner and outer ring, rollers, and, in most cases, a cage or roller separator make up the construction.

 

Bearing Housing Variations 

 

Heavy-duty applications, such as those found in the manufacturing, mining, and construction industries, require reinforced Plummer block housings.

 

For convenient bearing replacement and inspection, split bearing housings are totally split to the shaft.

 

Bearing Specifications

 

Pillow block bearings are chosen based on the following criteria:

 

Shaft Diameter - The diameter of the bearing unit must correspond to the bore measurements of the bearing unit. Pillow block bearings of the proper size glide easily onto the shaft and into place, ready to be fastened by the locking device.

 

Shaft Height - The distance between the base of a pillow block bearing and the center of the shaft is used to define the shaft height or backing height.

 

Shaft Size - The shaft's maximum diameter or the mounted bearing's bore size.

 

Maximum Speed - The maximum permitted shaft speed for which the bearing was designed to work.

 

Maximum Load - The maximum permitted radial load for bearings that can only accept radial loads or the dynamic load capacity for bearings that can take both radial and thrust loads. The load rating is affected by shaft speed. For load ratings at various shaft speeds, check with the manufacturer.

 

Material Selection 

 

Housing Material 

 

The bearing housing covers the bearings while they are in use and also provides a method to secure the bearing when it is in use. Pillow block housing can be manufactured out of a variety of materials, each with its own set of characteristics.

 

Aluminum - has a good load-bearing capacity, fatigue resistance, and thermal conductivity.

 

Cast Iron - refers to a group of materials that are primarily made up of iron, with traces of carbon and silicon. Cast irons are natural composite materials whose microstructures - the stable and metastable phases generated during solidification or subsequent heat treatment - define their qualities.

 

Pressed Steel - It's a low-carbon steel that's been pressed instead of machined. For lesser load-carrying applications, pressed steel pillow blocks are less expensive than cast or machined steel pillow blocks.

 

Plastic - refers to a variety of organic, synthetic, or processed materials that are generally high molecular weight thermoplastic or thermosetting polymers that can be formed into objects, films, or filaments. Acetal, Nylon / Polyamide, and PTFE / Teflon are all common plastic materials.

 

Stainless Steel - is chemically and corrosion-resistant, and can withstand high pressures.

 

Bearing Material 

 

The material used to manufacture the bearing has a considerable impact on the bearing unit's performance.

 

Steel - is a commercial iron that incorporates carbon as an essential alloying ingredient in any level up to roughly 1.7 percent. It is malleable under the right conditions, and it differs from cast iron in that it is malleable and has a reduced carbon concentration. High carbon steel, such as 52100, is commonly used in bearings.

 

Sintered Steel - Powdered-metal bearings are another name for them. They are self-lubricating, easy to use, and inexpensive. These porous bronze and copper alloys can be treated with oil, graphite, or PTFE to make them more durable. They are not recommended for severely loaded applications, although they are useful in situations where lubrication is difficult.

 

Graphite Metal - alloy is an alloy made of molten graphite and metal with a bearing surface. This material is lubricating on its own.

 

Plastic - refers to a variety of organic, synthetic, or processed materials that are typically high molecular weight thermoplastic or thermosetting polymers and can be formed into objects, films, or filaments. They don't need to be lubricated, and their exceptional strength makes them suitable for a wide range of applications. Acetal, Nylon / Polyamide, and PTFE / Teflon are all common plastic materials.

 

So, above are the points you keep in mind while selecting the best Plummer block bearing for your application. EIBC is the best Plummer block supplier in India, For more information on Plummer block bearings, you can contact us.