Product Description
The CMT 184.252.00 ER40 Precision Collet - 25mm Diameter is a high-accuracy toolholding collet engineered to DIN 6499 standards, designed for use with ER40 chuck systems on CNC routers, machining centers, and point-to-point machines. Built by CMT for demanding milling, boring, and CNC routing applications, this precision collet delivers consistent, repeatable tool clamping across a full range of shank sizes - making it a reliable choice for woodworking and light metalworking professionals who depend on minimal runout and tight tolerances.
Key Features
- ER40 Precision Collet System (DIN 6499 Standard) - precisely machined to DIN 6499 tolerances, ensuring minimal runout and maximum tool accuracy during high-speed CNC operations
- 25mm Bore Diameter - securely grips 25mm shank tools, providing a firm, vibration-resistant hold that protects both the tool and the workpiece
- Wide Clamping Range (3mm to 25mm) - compatible with standard ER40 collets ranging from 3 to 25mm, offering versatility across multiple tool sizes without changing chuck systems
- Fits Most Tapered Spindle Noses - drop-in compatibility with CMT chucks 183.201, 183.211, 183.221, and 183.310, as well as most tapered spindle noses, reducing setup time and expanding machine compatibility
- Replaceable Standard ER40 Collet - a direct replacement for worn or damaged ER40 collets, letting operators restore precision without replacing the entire chuck assembly
Why This Product
- For CNC router and machining center operators running 25mm shank tooling, this collet provides a DIN 6499-grade clamping solution that maintains tight tolerances in production environments where accuracy directly affects part quality.
- The ER40 system's wide clamping range - from 3mm to 25mm - means a single chuck body can accommodate a broad variety of tools, reducing toolholder inventory and downtime spent swapping hardware.
- Direct compatibility with CMT chucks 183.201, 183.211, 183.221, and 183.310 makes this collet a straightforward, no-guesswork replacement for shops already running CMT toolholding systems.
- As a replaceable standard ER40 collet, it offers a cost-effective way to maintain peak clamping precision - swap out only the collet rather than the entire chuck when wear affects performance.
Specifications
- Manufacturer Part Number: 184.252.00
- Brand: CMT Orange Tools
- Collet System: ER40
- Standard: DIN 6499
- Bore Diameter: 25mm
- Compatible Chucks: 183.201, 183.211, 183.221, 183.310
- Clamping Range: 3mm to 25mm
Approved Applications
- CNC Routing
- Boring
- Milling
Frequently Asked Questions
Which CMT chucks is this collet compatible with?
This ER40 precision collet is designed for use with CMT chucks 183.201, 183.211, 183.221, and 183.310, and also fits most standard tapered spindle noses that accept ER40 collets.
What is the full clamping range of the ER40 collet system?
The ER40 system accommodates replaceable standard collets ranging from 3mm to 25mm in shank diameter. This specific collet is sized for 25mm shank tooling.
What precision standard does this collet meet?
This collet is manufactured to the DIN 6499 standard, which governs dimensional tolerances and concentricity for ER-type collets - ensuring reliable, low-runout tool clamping in precision machining applications.
What types of machines can use this ER40 collet?
This collet is suitable for CNC routers, machining centers, and point-to-point machines that are equipped with an ER40 compatible chuck system.
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