Product Description
CMT 990.059.00 Screw for Bearing - TCEI 1/8" x 1/2" x 5/8" (Diameter: 5.5mm) is a precision replacement fastener from CMT designed to secure bearings on router bits and cutter heads. This TCEI-style bearing retention screw keeps bearings firmly locked in place during cutting operations, helping maintain accuracy, reduce vibration, and extend the working life of your CMT tooling. Whether you are restoring a worn router bit or simply replacing a lost fastener, having the correct screw on hand means less downtime and more consistent results at the router table or on the job site.
Key Features
- TCEI screw design with 1/8" drive - engineered specifically for bearing retention on CMT router bits and cutter heads, ensuring a secure, tool-compatible fit
- 5.5mm diameter with 1/2" thread length and 5/8" overall profile - precise dimensions mean the screw seats correctly without risk of overtightening or misalignment
- Purpose-built bearing retention function - holds the bearing firmly against the router bit body so the bearing tracks cleanly along guide edges without slipping or wobbling
- Replacement part classification (RP/RPRB) - allows users to restore the full performance of a CMT router bit without purchasing an entirely new bit, saving cost on tooling
Why This Product
- Exact OEM specification from CMT - this screw is produced to the same tolerances as the original fastener, so your bearing retention is restored without compromise to fit or function
- Targeted solution for a common tooling issue - a missing or stripped bearing screw can render an otherwise good router bit unusable; this replacement addresses that problem directly and affordably
- Compatible with CMT router bits that use 1/8" TCEI screws - eliminates guesswork when sourcing a replacement, since the part number and drive type are matched to specific CMT tooling configurations
- Compact and precise at 5.5mm diameter - the tight dimensional spec means no risk of the screw interfering with the bearing seat or the workpiece during routing passes
Specifications
- Manufacturer Part Number: 990.059.00
- Brand: CMT Orange Tools
- Description: SCREW FOR BEARING TCEI 1/8" x 1/2" x 5/8" D=5.5mm
- Drive Type: TCEI 1/8"
- Thread Length: 1/2"
- Overall Length: 5/8"
- Diameter: 5.5mm
- Application: Screw for bearing retention
- Compatible With: CMT router bits with 1/8" TCEI screws
- Product Class: RPRB
- Status: Active
Frequently Asked Questions
What does TCEI mean and what tool do I need to drive this screw?
TCEI refers to the internal hex (Allen-style) socket head screw standard. To install or remove this screw, you will need a 1/8" hex key or Allen wrench that matches the drive size specified in the product data.
Which CMT router bits use the 990.059.00 bearing screw?
This screw is designed for CMT router bits and cutter heads that use a 1/8" TCEI bearing retention screw with a 5.5mm diameter fastener. Check your existing CMT router bit for a TCEI drive socket on the bearing screw to confirm compatibility before ordering.
Can I use a generic screw of the same size as a substitute?
This part is the OEM CMT replacement fastener, engineered to the exact dimensions of 1/8" drive, 1/2" thread length, 5/8" overall length, and 5.5mm diameter. Using a non-OEM substitute risks improper seating of the bearing, which can affect cutting accuracy and safety.
Is this a single screw or a multi-pack?
The product data does not specify a multi-pack quantity, so this item is understood to be sold as a single screw. Refer to the listing details at the time of purchase to confirm the quantity shipped.
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