Product Description
CMT Precision Collet ER25 - 1/4 in. (6.35mm) by CMT is a replaceable, precision-ground collet designed to hold 1/4 in. shank router bits and CNC tooling with exceptional accuracy. Built to DIN 6499 standards, this ER25 collet delivers consistent, low-runout clamping performance across CNC routers, machining centers, and point-to-point machines - making it a dependable choice for milling, boring, and precision CNC routing in wood, composite, and aluminum applications.
Key Features
- DIN 6499 precision ground to ER25 standard - ensures minimal runout and repeatable tool accuracy, critical for clean cuts and tight tolerances in CNC and milling work.
- Replaceable standard precision collet - allows you to swap collets quickly without replacing the entire chuck, reducing downtime and tooling costs on the shop floor.
- Compatible with most conical chucks - gives you broad machine compatibility, so one collet works across multiple setups and tool holding systems.
- 1/4 in. (6.35mm) bore diameter - matches the industry-standard 1/4 in. shank size used by a wide range of router bits and CNC cutting tools, making it easy to tool up for everyday machining tasks.
- ER25 collet system - a widely adopted, interchangeable tooling standard that integrates seamlessly into compatible ER25 chucks found on CNC routers and machining centers.
Why This Product
- Precision machined to DIN 6499 standards, this collet delivers low-runout clamping that protects your cutting tools and produces cleaner, more accurate results in routing and milling operations.
- The ER25 system compatibility means this collet fits a broad range of conical chucks, making it a versatile addition to shops running multiple CNC machines or machining centers.
- As a replaceable collet, it extends the service life of your existing toolholding setup - you replace only the worn component rather than the full chuck assembly, keeping costs in check.
- The 1/4 in. (6.35mm) bore size covers one of the most commonly used router bit shank diameters, making this collet a practical everyday tooling solution for CNC routing, boring, and milling across hardwood, softwood, MDF, plywood, composites, and aluminum.
Specifications
- Manufacturer Part Number: 184.064.25
- Brand: CMT Orange Tools
- Collet System: ER25
- Bore Diameter: 6.35mm (1/4 in.)
- Standard: DIN 6499
- Product Class: Router Cutter
Approved Applications
- CNC Routing
- Boring
- Milling
Frequently Asked Questions
What collet system does this product use?
This collet uses the ER25 system, which is a widely adopted standard compatible with most conical ER25 chucks found on CNC routers, machining centers, and point-to-point machines.
What shank size does this collet accept?
This collet is designed for 1/4 in. (6.35mm) shank diameter tools, covering one of the most common sizes used in CNC routing and milling tooling.
What standard is this collet machined to?
This precision collet is manufactured to DIN 6499 standard, which specifies tight dimensional tolerances to minimize runout and ensure accurate, repeatable tool positioning.
Can this collet be used across different machine types?
Yes. As a replaceable standard precision collet suitable for most conical chucks, it is compatible with CNC routers, machining centers, and point-to-point machines, making it a flexible toolholding solution for varied shop environments.
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