Product Description
The CMT 799.064.00 Bushing 1/4" - 5/16" is a precision-ground steel reduction bushing designed to adapt bearing and collet bore sizes on routers and router tables. Built from solid steel and machined to tight tolerances, this compact adapter lets woodworkers fit CMT router bits and tooling accurately into the correct bore without play or wobble - keeping cuts clean and tool positioning repeatable.
Key Features
- Reduction bushing for bearing - adapts mismatched bore sizes so CMT router bits and accessories seat correctly, eliminating the need to source separate tooling for different bore configurations.
- Steel construction - provides the rigidity and wear resistance needed to maintain a secure, stable fit between bearing and collet components during repeated use.
- Precision-ground finish - ensures accurate, wobble-free mounting so the tool runs true and consistent cuts are repeatable from one pass to the next.
- 8mm outer diameter with 6.35mm bore - engineered to bridge the gap between 1/4" and 5/16" tooling, giving the correct interference fit without modification.
- 25mm total length - provides sufficient contact area for a stable, non-rocking fit inside bearing and collet assemblies.
Why This Product
- When your router bit or bearing has a different bore than your collet or mounting assembly, this bushing closes that gap precisely - no improvised shimming or guesswork required.
- The precision-ground steel body holds tight dimensional tolerances, so there is no slop or runout introduced into the setup - critical for clean, professional results on a router or router table.
- At 25mm in length with an 8mm outer diameter and a 6.35mm bore, the dimensions are matched specifically to the 1/4" - 5/16" reduction, making this a targeted solution rather than a generic adapter.
- Steel construction means this bushing holds up to the clamping forces and rotational loads present in router and router table applications without deforming or wearing quickly.
Specifications
- Manufacturer Part Number: 799.064.00
- Brand: CMT Orange Tools
- Description: Bushing 1/4" - 5/16"
- Diameter: 8mm
- Bore Diameter: 6.35mm
- Total Length: 25mm
- Material: Steel
- Product Type: Reduction Bushing
Approved Applications
- Adapting bearing and collet bore sizes on routers
- Adapting bearing and collet bore sizes on router tables
- Use with CMT router bits and tooling requiring bore size reduction
Frequently Asked Questions
What does this bushing actually do?
It is a reduction bushing that adapts the bore size between a bearing or collet and the tool being mounted. Specifically, it reduces from a 5/16" opening down to accept a 1/4" shank or component, with an 8mm outer diameter and a 6.35mm bore diameter to achieve this fit.
What machines is this bushing compatible with?
This reduction bushing is designed for use with routers and router tables, fitting into bearing and collet assemblies used on those machines.
What material is the bushing made from, and why does that matter?
The bushing is made from steel. Steel provides the rigidity and durability needed to withstand the clamping forces and rotational loads in router and router table applications, and it holds the precision-ground tolerances required for accurate, wobble-free tool mounting.
How long is this bushing, and does length affect performance?
The total length is 25mm. This length provides sufficient contact area between the bushing and the bearing or collet assembly, helping ensure a stable, non-rocking fit that keeps the tool running true.
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