Product Description
CMT Screw for Bearing TCEI M8x25x33mm (Diameter: 13mm) is a precision replacement fastener from CMT, engineered to secure bearings in router bits, cutter heads, and related CNC tooling assemblies. This TCEI socket head cap screw follows the UNI-5931 standard and delivers the exact fit and thread engagement needed to keep bearing components locked firmly in place during demanding routing and cutting operations. Whether you are restoring a worn cutter head or assembling CNC tooling accessories, this purpose-built screw helps maintain accurate, vibration-free performance across the full range of compatible CMT tooling.
Key Features
- TCEI socket head cap screw design (UNI-5931 standard) - the recessed hex socket drive allows precise torque application in tight tooling spaces, reducing the risk of slippage or fastener damage during installation or removal.
- M8x25x33mm thread and body dimensions - these exact dimensions are specified to match CMT bearing assemblies, ensuring correct thread engagement depth and proper clamping force without over-stressing the bearing seat.
- 13mm head diameter - the defined head diameter provides the correct bearing contact surface, distributing clamping load evenly so the bearing is held securely without distortion.
- CMT genuine replacement part (Class: RPRC) - sourced as an authentic CMT replacement component, this screw is matched to CMT tolerances, giving you confidence that fit and function are consistent with the original tooling design.
Why This Product
- Designed as a direct replacement for bearing fasteners in CMT router bits and cutter heads - eliminates the guesswork of sourcing a generic substitute that may not match thread pitch, shank length, or head geometry.
- The UNI-5931 TCEI standard ensures this screw meets a recognized dimensional specification - giving machinists and woodworkers a verifiable reference point when confirming compatibility with their tooling.
- Using a correctly specified screw with the right head diameter (13mm) and body length (M8x25x33mm) protects bearing components from uneven clamping stress, which can extend the working life of the bearing and the cutter assembly as a whole.
- As an active CMT replacement part, this fastener is available when tooling maintenance is needed - helping shops keep CNC routers and cutter heads running without waiting on custom or hard-to-find hardware.
Specifications
- Manufacturer Part Number: 990.099.00
- Brand: CMT Orange Tools
- Description: Screw for Bearing TCEI M8x25x33mm D=13mm
- Screw Type: TCEI (Socket Head Cap Screw, UNI-5931)
- Thread Size and Body Dimensions: M8x25x33mm
- Head Diameter: 13mm
- Product Class: RPRC (Replacement Component)
- Status: Active
Frequently Asked Questions
What does TCEI mean for this screw?
TCEI refers to the socket head cap screw style as defined by the UNI-5931 standard. It features a cylindrical head with a recessed internal hex (Allen) socket drive. This design allows the screw to be tightened with a hex key in confined spaces typical of router bit and cutter head bearing assemblies, where a conventional external-drive fastener would not fit.
What do the dimensions M8x25x33mm mean for this bearing screw?
M8 refers to the metric thread diameter of 8mm. The 25mm dimension indicates the thread length or grip length, and 33mm refers to the overall body or shank length. Together, these three values define the complete dimensional profile of the screw, ensuring it seats correctly in the bearing pocket without bottoming out or leaving insufficient thread engagement.
What is the significance of the 13mm head diameter?
The 13mm head diameter is the contact surface that bears against the component being clamped - in this case, a bearing assembly in a CMT cutter head or router bit. A correctly sized head diameter distributes the clamping force evenly across the bearing face, preventing localized stress that could deform the bearing seat or cause premature wear.
Is this screw a genuine CMT replacement part?
Yes. This screw carries CMT part number 990.099.00 and is classified as an active RPRC (replacement component) in the CMT product line. It is intended as a direct replacement fastener for CMT CNC tooling and cutter head assemblies, manufactured to CMT's own dimensional specifications.
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