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Compel Groupgroup

Mounted Bearings

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Mounted bearings provide support for a rotating shaft and are designed for simple installation. These units consist of a bearing insert housed within a mounting block, such as a pillow block or flange. They are fundamental components in conveyor systems, industrial machinery, and automation equipment. While the category includes various styles like flange bearings and take-up bearings, our selection focuses on the most common type: industrial mounted bearings in a pillow block configuration.

Our focused range of pillow block bearings is specified for trade and industrial applications. We supply units with housings in zinc alloy for general use and 304 stainless steel for environments requiring high corrosion resistance. With inner bore diameters from 8mm to 25mm, you can find a precise fit for your machinery's shaft. Compel provides clearly specified components to ensure you get the correct bearing for your equipment without a difficult search.

Select the Right Housing Material

The bearing housing material is determined by the operating environment. For most standard, dry industrial applications, a zinc alloy housing provides sufficient strength and durability. It is a cost-effective choice for general machinery and equipment.

For applications with exposure to moisture, chemicals, or frequent washdowns, a 304 stainless steel housing is the correct choice. Its high corrosion resistance prevents rust and contamination, making it suitable for food processing, pharmaceutical, or marine environments. Choosing stainless steel in these conditions extends the service life of the bearing.

Determine Bore Size and Mounting Requirements

The most important measurement for any mounted bearing is the inner bore diameter, which must match your shaft's diameter for a proper fit. Our pillow block bearings accommodate metric shafts ranging from 8mm to 25mm. Measure your shaft carefully before ordering to ensure compatibility.

Pillow block bearings are mounted on a surface parallel to the shaft. For standard loads and speeds, a standard base is sufficient. For high-speed operation or applications with significant vibration, select a model with a heavy-duty, thickened vertical base. This provides increased stability and support, reducing wear and improving performance.

Understanding Pillow Block vs. Other Mounted Bearings

The term 'mounted bearings' covers several housing types. The pillow block bearing is the most prevalent, featuring a base with two mounting holes for securing to a flat surface parallel to the shaft.

Other types include flange bearings, which mount to a surface perpendicular to the shaft, and take-up bearings, which are used in a frame to adjust shaft position for tensioning belts or chains. Our current catalog is concentrated on pillow block bearings, which serve the majority of shaft support applications in industrial machinery.

Buying guide

Choosing Mounted Bearings

When should I use a stainless steel pillow block bearing?
Choose a 304 stainless steel pillow block bearing for equipment used in wet, corrosive, or hygienic environments. Its resistance to rust and chemical damage is necessary for industries like food and beverage, chemical processing, and marine applications.
How do I select the correct bearing bore size?
The bearing's inner bore diameter must exactly match the diameter of the shaft it will be mounted on. Measure your shaft's diameter and select a bearing with the corresponding bore size. Our range supports common metric shafts from 8mm to 25mm.
Are these mounted bearings suitable for high-speed operation?
Certain models are designed for high-speed use. Look for pillow block bearings with a specified heavy-duty or thickened base, as this construction provides the stability required for higher RPMs. Always consult the product datasheet for specific speed ratings.
What is the main difference between a pillow block and a flange bearing?
A pillow block bearing mounts on a surface parallel to the shaft axis, making it ideal for supporting a shaft on a flat foundation. In contrast, a flange bearing mounts on a surface perpendicular to the shaft, such as the side wall of a machine.
What does a series designation like KP or UCP mean?
Series designations like KP refer to the bearing and housing's dimensions, load capacity and design standard. The KP series here denotes a light-duty pillow block with a set screw lock. Always check the datasheet to confirm the series matches your application's requirements.
Do these pillow block bearings require lubrication?
Most of our mounted bearings are supplied pre-lubricated and sealed for the life of the unit, requiring no maintenance. Where a listing shows a grease nipple, the unit can be re-lubricated, which extends service life in demanding conditions.