NA Eccentric Locking Insert Bearing Size Chart
When it comes to keeping your equipment running smoothly, choosing the right insert bearing is critical. NA series insert bearings are a go-to solution for mounted bearing applications, offering durability, easy installation, and reliable locking performance. At MDS of Michigan, we supply a full range of NA insert bearings designed to perform in real-world industrial environments. Custom sizes available upon request.
Shop NA Insert Bearings Online
What Is an NA Insert Bearing?
The NA201-8 0.5″ insert bearing is a great example of what makes this series so dependable:
- Wide inner ring for added shaft support
- Eccentric 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 NA insert bearing sizes, including bore and outside diameter:
| Part # | Bore Diameter | Outside Diameter |
| NA201-8 | 0.5″ | 1.85″ |
| NA202-10 | 0.62″ | 1.85″ |
| NA204-12 | 0.75″ | 1.85″ |
| NA205-14 | 0.87″ | 2.04″ |
| NA205-15 | 0.93″ | 2.04″ |
| NA205-16 | 1″ | 2.04″ |
| NA206-18 | 1.12″ | 2.44″ |
| NA206-19 | 1.18″ | 2.44″ |
| NA206-20 | 1.25″ | 2.44″ |
| NA207-20 | 1.25″ | 2.83″ |
| NA207-21 | 1.31″ | 2.83″ |
| NA207-22 | 1.37″ | 2.83″ |
| NA207-23 | 1.43″ | 2.83″ |
| NA208-24 | 1.5″ | 3.15″ |
| NA209-26 | 1.62″ | 3.34″ |
| NA209-27 | 1.68″ | 3.34″ |
| NA209-28 | 1.75″ | 3.34″ |
| NA210-30 | 1.87″ | 3.35″ |
| NA210-31 | 1.93″ | 3.35″ |
| NA210-32 | 2″ | 3.35″ |
| NA211-32 | 2″ | 3.93″ |
| NA211-34 | 2.12″ | 3.93″ |
| NA211-35 | 2.18″ | 3.93″ |
| NA212-36 | 2.25″ | 4.33″ |
| NA212-38 | 2.37″ | 4.33″ |
| NA212-39 | 2.43″ | 4.33″ |
| NA213-40 | 2.5″ | 4.72″ |
What Housings Do NA Insert Bearings Fit?
NA 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 Eccentric Locking?
The NA series primarily uses an eccentric locking collar, and for good reason:
- Tightens in the direction of shaft rotation
- Creates a strong, vibration-resistant hold
- Easy to install with basic tools
- Ideal for conveyor systems, fans, and general industrial use
This makes it a reliable option for applications where shafts rotate consistently in one direction.
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 NA 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!
