Product Description
The CMT Screw for Bearing TCEI M5 x 10 x 15mm Uni-5931 (Diameter: 8.5mm) is a precision replacement and repair fastener engineered specifically for CMT router bits and cutter heads that use M5 TCEI socket cap screws to retain bearings. Conforming to the Uni-5931 standard, this screw ensures a secure, repeatable fit that keeps bearings locked in position during high-speed routing operations - reducing the risk of bearing shift and maintaining consistent cut quality. Whether you are restoring a worn bit or stocking spare hardware for a production shop, this small but critical component helps extend the working life of your CMT tooling investment.
Key Features
- TCEI (Socket Cap) Drive Style - the internal hex socket head accepts a standard hex key for easy installation and removal in tight clearances around router bit bodies, without the risk of slipping that can damage surrounding components.
- M5 x 10mm Thread Specification - matches the threaded bore found on CMT router bits and cutter heads designed for M5 TCEI bearing retention screws, ensuring a precise, wobble-free engagement that properly clamps the bearing in place.
- 15mm Total Length - provides sufficient thread engagement depth to securely anchor the bearing without bottoming out prematurely, maintaining full clamping force throughout the fastener's service life.
- 8.5mm Head Diameter - sized to bear squarely against the bearing race or retaining surface, distributing clamping load evenly and preventing the screw from pulling through or rocking under the stresses of routing.
- Uni-5931 Standard Compliance - conforming to this established Italian national standard means the screw meets defined dimensional and mechanical tolerances, giving you confidence in fit and performance across compatible CMT tooling.
- CMT Part Classification RPRB - categorized as a genuine CMT repair and replacement bearing part, so you can be confident this is the correct specification component for maintaining CMT bearing-guided bits.
Why This Product
- Using the correct OEM-specified M5 TCEI screw eliminates the guesswork of sourcing generic hardware that may not match the exact thread pitch, head diameter, or length required by CMT tooling - protecting your bits and bearings from improper fit.
- A properly seated bearing retention screw is essential for safe router bit operation; this screw's Uni-5931 compliance and 8.5mm head diameter work together to keep the bearing locked against axial movement at routing speeds.
- The socket cap (TCEI) drive format allows the screw to be torqued down in the confined space around a router bit shank using a simple hex key - no special tooling required for routine maintenance or field replacement.
- Stocking genuine CMT replacement screws means a worn or lost bearing screw does not sideline a valuable cutter head - a low-cost component that keeps expensive CMT bits productive and running safely.
Specifications
- Manufacturer Part Number: 990.010.00
- Brand: CMT Orange Tools
- Description: SCREW FOR BEARING TCEI M5x10x15mm UNI-5931 D=8.5mm
- Thread Size: M5 x 10 x 15mm
- Diameter: 8.5mm
- Drive Type: TCEI (Socket Cap)
- Standard: Uni-5931
- Part Class: RPRB (Replacement Bearing Part)
- Status: Active
- Country of Origin: Made in Italy
Frequently Asked Questions
What router bits or tooling is this screw designed for?
This screw is designed for use with CMT router bits and cutter heads that use M5 TCEI (socket cap) screws to retain their bearings. It is a genuine CMT replacement part classified under the RPRB bearing parts category.
What does TCEI mean and what tool do I need to install this screw?
TCEI refers to a socket cap screw design with an internal hexagonal (Allen) drive socket in the head. To install or remove this screw, you will need a standard metric hex key (Allen wrench) sized to fit an M5 socket cap screw head.
What is the Uni-5931 standard and why does it matter?
Uni-5931 is an established Italian national dimensional and mechanical standard for socket cap screws. Compliance with this standard means the screw meets defined tolerances for thread form, head geometry, and material properties - ensuring a consistent, reliable fit in CMT tooling designed around this specification.
How do I know this is the right screw for my CMT tool?
Verify that your CMT router bit or cutter head calls for an M5 TCEI bearing retention screw conforming to Uni-5931, with a total length of 15mm and a head diameter of 8.5mm. You can cross-reference CMT part number 990.010.00 against your tool's parts breakdown or maintenance documentation to confirm compatibility.
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