Product Description
CMT STEI Conical Screw M5 x 5mm (UNI-5927) by CMT is a precision replacement fastener designed for bearing retention in CMT router bits and cutter heads. This conical-profile set screw follows the UNI-5927 standard, providing a reliable mechanical hold that keeps bearings firmly seated during demanding routing and cutting operations. When a worn or damaged bearing screw compromises the performance of your tooling, having the correct M5 x 5mm replacement on hand restores your router bits and cutter heads to full working condition quickly and accurately.
Key Features
- STEI conical profile per UNI-5927 standard - the tapered conical point seats precisely against bearing components, locking them in place and preventing movement or vibration during cutting passes.
- M5 x 5mm thread and body dimensions - matches OEM specifications for compatible CMT router bits and cutter heads, so replacement is straightforward with no modification required.
- Designed as a CMT replacement part (Class RPBB) - engineered to restore original factory function, extending the working life of your existing CMT tooling investment rather than requiring full bit replacement.
Why This Product
- Using the exact OEM CMT replacement screw ensures bearing retention meets the original design specification - aftermarket alternatives with incorrect geometry can allow bearing movement and accelerate wear on precision tooling.
- The conical UNI-5927 profile is purpose-built for bearing retention applications, applying clamping force at the correct angle for secure, repeatable seating every time the screw is torqued down.
- Keeping this small but critical fastener as a spare means a worn or stripped bearing screw does not force extended downtime - the M5 x 5mm screw is a stock replacement that gets your CMT cutter heads and router bits back in service without waiting for a full tool replacement.
- The active production status of part number 990.002.00 confirms this screw remains a currently supported CMT component, making it a dependable long-term solution for maintaining CMT tooling.
Specifications
- Manufacturer Part Number: 990.002.00
- Brand: CMT Orange Tools
- Description: SCREW FOR BEARING STEI CONICAL M5x5mm UNI-5927
- Thread Size and Length: M5 x 5mm
- Profile Type: STEI Conical
- Standard: UNI-5927
- Product Class: RPBB
- Status: Active
Frequently Asked Questions
What is the purpose of this screw in a CMT router bit or cutter head?
This M5 x 5mm STEI conical screw is used specifically for bearing retention. Its tapered conical point, conforming to the UNI-5927 standard, clamps against bearing components inside CMT router bits and cutter heads to hold them securely in position during operation.
What does the STEI conical designation mean?
STEI refers to the screw type classification, and "conical" describes the shape of the point - a tapered tip designed to engage precisely with bearing seats. This geometry provides positive locking force when tightened, which is why it is the specified fastener type for bearing retention rather than a flat or cup-point set screw.
Is this screw compatible with all CMT router bits?
This screw is compatible with CMT router bits and cutter heads that call for an M5 x 5mm STEI conical UNI-5927 bearing screw. Always verify the required screw specification for your specific CMT tool model before ordering to confirm correct fit.
What does the UNI-5927 standard indicate?
UNI-5927 is an Italian national standards designation that defines the dimensional and geometric requirements for this type of set screw. Compliance with this standard ensures the screw's thread pitch, overall length, and conical point geometry meet precise engineering tolerances for reliable performance in bearing retention applications.
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