HL Insert Bearing H-Locking Size Chart

Posted on April 16, 2026 in FAQ, Size Chart

If you have ever dealt with a bearing that keeps loosening, spinning in the housing, or wearing out faster than it should, you know how frustrating and expensive the wrong insert bearing can be. We see it all the time with customers across Michigan, especially in conveyors, fans, and general industrial equipment where vibration and real-world conditions push components to their limits.

That is exactly where HL insert bearings come in. At MDS of Michigan, we supply H locking insert bearings built to handle those everyday challenges, offering a more secure shaft grip, better resistance to vibration, and longer service life. Whether you are replacing a failed unit or trying to prevent downtime before it happens, this guide will walk you through HL insert bearing sizes, features, and why they are a smart upgrade for demanding applications. Custom sizes available upon request.

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What Is an HL Insert Bearing?

Lean what makes this series so dependable:

• Wide inner ring for added shaft support
• H-Locking collar for secure shaft attachment
• 52100 high-carbon steel construction for strength and longevity
• Grade 16 balls for smooth, consistent rotation
• Pre-lubricated with Shell Alvania 2 grease
• Buna Nitrile seal with slinger to keep contaminants out
• Optional stainless steel version available

These bearings are built for standard-duty applications where reliability and ease of maintenance matter.

Below is a full breakdown of HL insert bearing sizes, including bore and outside diameter:

What Housings Do HL Insert Bearings Fit?

HL insert bearings are designed to fit into a variety of mounted bearing housings, making them extremely versatile:

• Pillow Block Housings (UCP Series) – Ideal for mounted applications where the shaft is parallel to the mounting surface.
• Two-Bolt Flange Housings (UCFL Series) – Common in conveyor systems and light-duty machinery.
• Four-Bolt Flange Housings (UCF Series) – Provide additional stability for heavier loads.
• Take-Up Units (UCT Series) – Used in belt tensioning applications like conveyor systems.

These housings allow for quick replacement and alignment, reducing downtime in your operation.

Why Choose an H-Locking Bearing with Anti-Rotation Pin?

H-locking bearings already provide a strong, even grip on the shaft using a compression-style locking system, but when combined with an anti-rotation pin, you get an even more secure and reliable setup.

The H-locking mechanism holds firmly on the shaft, while the anti-rotation pin prevents the bearing insert from spinning inside the housing. Together, they reduce wear, improve stability, and extend overall component life.

This combination is especially effective in demanding applications:

• Even shaft grip reduces shaft damage and wear
• Anti-rotation pin prevents insert movement inside the housing
• Performs well in high vibration and shock load environments
• Ideal for reversing or start-stop applications
• Reduces housing wear and maintains proper alignment
• Increases overall bearing reliability and service life
• More forgiving on worn or slightly undersized shafts

For applications where failure is not an option, H-locking bearings with anti-rotation pins offer a durable, low-maintenance solution that helps prevent downtime and costly repairs.

At MDS of Michigan, we do more than just supply bearings, we help you choose the right solution for your application. With a large inventory of HL insert bearings and housings, expert support for proper sizing and selection, fast shipping across Michigan and beyond, and access to stainless steel and specialty options, we make it easy to keep your equipment running efficiently.

Click the product links above or if you are unsure which size is right for your application, Click Here to contact us today!