Product Description
The CMT TSPEI M5x9x12mm Screw for Bearing (D=9.8mm, UNI-5933) by CMT is a precision replacement fastener designed for secure bearing retention in CMT router bits and cutter heads. Built to the UNI-5933 standard, this TSPEI-style socket head screw provides a reliable mechanical connection that keeps bearings properly seated during demanding routing operations - helping maintain cutting accuracy and reducing the risk of bearing movement or play over time.
Key Features
- TSPEI socket head design (UNI-5933 standard) - conforms to a recognized fastener specification, ensuring consistent fit and torque transfer when securing bearings on compatible CMT tooling
- M5 thread with 9mm thread engagement and 12mm overall length - delivers proper thread depth and clamping reach for secure bearing retention without bottoming out or under-engaging
- 9.8mm head diameter - provides adequate bearing surface contact to distribute clamping load evenly across the bearing seat, protecting the bearing race
- Purpose-built replacement screw for CMT router bits - restores original factory function when a bearing retention screw is worn, stripped, or missing, extending the service life of existing tooling
Why This Product
- Replacing a worn or missing bearing retention screw with the correct CMT-specified TSPEI M5 fastener ensures the bearing remains properly locked, maintaining concentricity and smooth rotation during cutting
- The UNI-5933 standard designation means this screw is built to a defined dimensional and mechanical specification - not a generic substitute - so thread fit and head geometry match the original CMT design intent
- At M5x9x12mm with a 9.8mm head, every dimension is matched to the CMT tooling envelope, reducing the guesswork of sourcing a compatible replacement from a general hardware assortment
- Sourcing this screw directly by CMT part number 990.055.00 ensures you receive the exact fastener called for in CMT router bit maintenance, avoiding mismatched threads or incorrect head styles that could compromise bearing security
Specifications
- Manufacturer Part Number: 990.055.00
- Brand: CMT Orange Tools
- Description: SCREW FOR BEARING TSPEI M5x9x12mm D=9.8mm UNI-5933
- Screw Type: TSPEI (Socket Head)
- Thread Size: M5
- Thread Length: 9mm
- Overall Length: 12mm
- Head Diameter: 9.8mm
- Standard: UNI-5933
- Application: Screw for bearing retention on CMT router bits with M5 TSPEI screws
- Class: RPRB
- Status: Active
Frequently Asked Questions
What is this screw used for?
This screw is specifically designed for bearing retention on CMT router bits and cutter heads that use M5 TSPEI fasteners. It holds the bearing securely in place during routing operations, preventing movement or displacement that could affect cut quality or tool safety.
What does the TSPEI designation mean for this screw?
TSPEI refers to the socket head screw style conforming to the UNI-5933 standard. This designation defines the head geometry and dimensional requirements of the fastener, ensuring it matches the original specification used in CMT tooling designed to accept this screw type.
What are the exact dimensions of this screw?
This screw has an M5 thread, 9mm of thread engagement length, a 12mm overall length, and a 9.8mm head diameter. These dimensions correspond directly to the CMT part specification 990.055.00 and are required to match properly with compatible CMT router bit bearing seats.
How do I know if my CMT router bit uses this screw?
If your CMT router bit or cutter head uses an M5 TSPEI bearing retention screw conforming to UNI-5933, this part - CMT 990.055.00 - is the specified replacement. Refer to your CMT tool documentation or the existing screw markings to confirm the thread size and head style before ordering.
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