Product Description
The CMT 990.058.00 Screw for Bearing - TCEI 1/8" x 3/8" x 1/2" (Diameter: 7mm) is a precision replacement fastener from CMT designed to secure bearings on router bits and cutter heads that use 1/8" TCEI screws. Keeping the right hardware on hand for bearing retention means faster bit maintenance, reduced downtime at the router table, and confidence that every component is properly fastened before a cut. This screw is a direct CMT replacement part, ensuring a correct fit with compatible CMT tooling every time.
Key Features
- TCEI socket head screw design - the recessed hex drive format allows precise torque application in tight spaces near the bearing seat, reducing the risk of cam-out or over-tightening during installation or removal.
- 1/8" x 3/8" x 1/2" sizing with 7mm diameter - matches the exact specification called out on compatible CMT router bits with 1/8" TCEI screws, eliminating guesswork when sourcing a replacement fastener.
- Genuine CMT replacement part (MPN: 990.058.00) - sourced directly from CMT, so fit and function are verified against the original tooling design rather than relying on a generic substitute.
- Purpose-built for bearing retention - engineered specifically to hold bearings in position on router bits and cutter heads, maintaining concentricity and safe operation during use.
Why This Product
- A lost or damaged bearing retention screw can sideline an otherwise functional router bit - having the correct CMT 990.058.00 on hand restores the bit to service quickly without the cost of replacing the entire tool.
- Because this is a genuine CMT part with the exact TCEI 1/8" x 3/8" x 1/2" specification, it threads cleanly into the existing tapped hole without risk of cross-threading or misfit that can occur with off-brand substitutes.
- The 7mm diameter and TCEI socket head format give a clean seating profile at the bearing, keeping the fastener from interfering with bearing rotation or workpiece clearance.
- Stocking this replacement screw is a straightforward preventive maintenance step for woodworkers and production shops that rely on CMT router bits with 1/8" TCEI bearing screws.
Specifications
- Manufacturer Part Number: 990.058.00
- Description: SCREW FOR BEARING TCEI 1/8" x 3/8" x 1/2" D=7mm
- Screw Type: TCEI (Socket Head Cap Screw)
- Thread Size: 1/8"
- Length: 3/8"
- Additional Dimension: 1/2"
- Diameter: 7mm
- For Use With: CMT router bits with 1/8" TCEI screws
- Brand: CMT Orange Tools
Frequently Asked Questions
What type of driver is needed to install the CMT 990.058.00 screw?
This screw uses a TCEI socket head design, which requires an appropriately sized hex (Allen) key or hex bit driver. Always use the correct size driver to avoid stripping the socket during bearing installation or removal.
How do I know if this screw is compatible with my CMT router bit?
This screw is designed for CMT router bits and cutter heads that use a 1/8" TCEI bearing retention screw. Check your bit's documentation or the existing screw specification - if it calls for a TCEI 1/8" x 3/8" x 1/2" screw with a 7mm diameter, the CMT 990.058.00 is the correct replacement part.
Is this a genuine CMT replacement part?
Yes. The CMT 990.058.00 is an active, genuine CMT replacement part - not an aftermarket substitute. Using the original CMT specification ensures proper thread engagement and bearing seating consistent with the original tool design.
What is the purpose of this screw on a router bit?
This screw is specifically designed for bearing retention. It fastens the bearing in place on the router bit or cutter head, keeping it correctly seated and concentric during operation. A properly torqued bearing retention screw is essential for safe and accurate routing performance.
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