4-Bolt Bearing Covers
4-Bolt bearing covers or bearing caps are for covering most 4-bolt flanged bearings.
4-Bolt bearing covers are usually fastened to the structure the bearing is attached to by the flange, drilling two holes in the flange and the underlying structure. It is advised to use self-tapping screws or nuts and bolts. For further installation instructions, see our flanged bearing cover installation guide.
By requiring hand tools to securely fasten the bearing cover to the machine, all sections of the ANSI/ASME B.15-1994/6, Section 3.2.1 are met. Easily removable snap-on covers cannot provide this level of protection.
Available in our standard 3/16″ heavyweight plastic and 1/8″ lightweight plastic.
| Part # |
Shaft Height A |
Shoulder Height J |
Width B |
Width B1 |
Inside Diameter L |
|---|---|---|---|---|---|
| 4BDE 3-7/16H | 6 | 9 | 10.125 | 10.75 | 7.1875 |
| 4BDE 2-7/16H | 3 | 6 | 10.4375 | 10.9375 | 6 |
| 4BDSC218H-ShortH | 3 | 4 | 8 | 8.375 | 6.5625 |
| 4BDSC218H-TallH | 2.5 | 5.25 | 8.125 | 8.5 | 6.4375 |
| 4BDSC215H | 2.5 | 5.25 | 7.6875 | 8 | 5.375 |
| 4BBVF4S-347H | 2.1875 | 4 | 7.6875 | 7.875 | 6.5625 |
| 4BSMSF-39H | 3 | 4 | 7.125 | 7.375 | 6 |
| 4BHCRX 2-7/16H | 3 | 4 | 6.625 | 7 | 5 |
| 4BDSC212H | 2.125 | 3.1875 | 7.125 | 7.4375 | 7.125 |
| 4BHCRX 2-3/16H | 2 | 3 | 6.375 | 6.6875 | 4.9375 |
| 4BDSC211H | 1.8125 | 7 | 7 | 7.125 | 7 |
| 4BHCRX 1-15/16H | 1.75 | 3 | 5.4375 | 5.6875 | 5.125 |
| 4BNUCF209H | 2.5 | 3.5 | 5.375 | 5.625 | 3.6875 |
| 4BDSC210H | 1.75 | 2.5625 | 6.125 | 6.375 | 6.125 |
| 4BDE-1-11/16H | 2.5 | 4 | 5.1875 | 5.5 | 4 |
| 4BSMSFB2115H | 1.5 | 2.9375 | 5.5625 | 5.75 | 4.75 |
| 4BBVF4S-227H | 1.3125 | 2.3125 | 5.25 | 5.375 | 2.5 |
| 4BDSC209H | 2 | 3.5 | 5.25 | 5.375 | 3.375 |
| 4BDSC208H | 1.75 | 3 | 5 | 5.25 | 3.375 |
| 4BDSC207H | 1.4375 | 2.25 | 5 | 5.1875 | 4.875 |
| 4BHCRX 1-7/16H | 2 | 3 | 4.375 | 4.625 | 3.25 |
| 4BDSC206H | 1.3125 | 2.0625 | 4.5 | 4.6875 | 4.375 |
| 4BDSC205H | 1.1875 | 1.875 | 4 | 4.1875 | 3.875 |
| 4BSMSF15H | 2 | 3 | 3.75 | 4 | 2 |
| 4BDSC204H | 1.25 | 1.8125 | 3.625 | 3.75 | 3.5 |
| 4BDSC203H | 1.5 | 2.25 | 3 | 3.1875 | 2.875 |
Our Quality Objective
Machine Guard & Cover Co. provides exemplary customer service by using high quality materials to produce parts that conform to our customer’s requirements, and ship on time. We strive to maintain a safe work environment for our employees.
Quality Policy
Machine Guard & Cover Co. is committed to quality. Therefore, we will:
- Design and produce parts that meet or exceed customer and governmental standards and expectations.
- Turn down business that requires a standard that does not conform with governmental safety regulations.
- Regularly review policies, objectives and outputs to ensure quality and maintain specifications.
- Maintain a safe, pleasant working environment for our employees.
- Create quality objectives and communicate them throughout our company.
- Seek opportunities for continuous improvement within the manufacturing process and the organization.
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Investing in Machine Guard & Cover Co. solutions means prioritizing safety, compliance, and operational efficiency. Whether you’re managing a military facility, public utility, or research lab, we have the guarding solutions to protect your workforce and equipment.
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Need Some Help?
How do I size a machine guard?
See our machine guard sizing worksheets for instructions on how to measure for a machine safety guard or cover.
Why use a plastic machine guard or cover?
In addition to being lightweight and durable, there are many plastic machine guard advantages.
How do we set up an account?
We need to see three good credit references. You can speed up the process by sending credit references with or before an initial order. Our standard terms are net 30 days upon approval of credit references. We accept Visa, MasterCard, American Express and Discover cards.
What kind of prints or drawings do you need to tool a custom part?
We have made tools from simple hand drawn sketches, and still can for simple projects. For more complex projects we prefer working with solid models in IGES or STEP format.
Are your guards OSHA approved?
OSHA does not approve guards. Our guards and other products, if installed correctly, meet OSHA requirements for most applications. For more information see OSHA Machine Guarding Standards.
