Product Description
CMT Shields for Bearings - 3/8" Diameter (for 791.002.00) are precision-made replacement shields designed to protect and seal the 3/8" bearing used in CMT router bit assemblies. Keeping your bearing shielded means longer service life, reduced contamination from sawdust and debris, and more consistent cutting performance over time. Whether you are restoring a worn assembly or stocking up on maintenance components, these bearing shields are the right-fit solution for CMT 3/8" bearings.
Key Features
- Designed specifically for the 3/8" CMT bearing (791.002.00) - ensures a precise fit with no modification required, so your bearing assembly stays protected and performs as intended.
- 4.76mm bore diameter - matches the bore of the CMT 791.002.00 bearing exactly, preventing misalignment and keeping the shield securely seated during routing operations.
- Sold under CMT part number 990.422.00 - easy to identify and reorder as a direct replacement shield for your existing 3/8" bearing setup.
- Part of the CMT 990.422/423 shield series for bearings - giving you a consistent, manufacturer-sourced component that maintains the integrity of your router bit assembly.
Why This Product
- A properly shielded bearing blocks sawdust, resin, and wood particles from contaminating the bearing races - helping you get more cuts between maintenance intervals and extending the life of the 791.002.00 bearing.
- Using an OEM-matched shield from CMT means no guesswork about compatibility - the 3/8" diameter and 4.76mm bore are engineered specifically for this bearing, so the fit is reliable every time.
- Replacing a worn or missing bearing shield is a low-cost way to restore router bit assembly performance without replacing the entire bearing or bit, saving time and money on upkeep.
- Stocking this component as a spare keeps your routing operation running without downtime - when a shield wears out, you can swap it immediately and get back to work.
Specifications
- Manufacturer Part Number: 990.422.00
- Brand: CMT Orange Tools
- Description: SHIELDS FOR BEARINGS D=3/8'' (for 791.002.00)
- Diameter: 3/8"
- Diameter Bore: 4.76mm
- Compatible Bearing: CMT 791.002.00
- Product Class: RPRB
Frequently Asked Questions
What bearing is this shield compatible with?
This shield is specifically designed for use with the CMT 791.002.00 bearing, which has a 3/8" diameter. It is not a universal shield - it is engineered to fit that specific CMT bearing only.
What is the bore diameter of this bearing shield?
The bore diameter of the CMT 990.422.00 shield is 4.76mm, matching the bore of the CMT 791.002.00 bearing for a secure, properly seated fit.
Why would I need to replace a bearing shield?
Bearing shields can wear, deform, or become dislodged over time from the heat and mechanical stress of routing operations. A compromised shield allows sawdust and debris to enter the bearing, leading to premature bearing failure. Replacing the shield restores protection and extends bearing life.
Is the 990.422.00 part of a series of CMT bearing shields?
Yes - the 990.422.00 is part of the CMT 990.422/423 shield series for bearings, which covers different bearing sizes within the CMT replacement parts lineup.
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