Product Description
The CMT ER40 Precision Collet - 5/8" (15.87mm) Diameter is a high-accuracy tool-holding collet built to DIN 6499 standards, designed for use with ER40 chuck systems in CNC routers, machining centers, and point-to-point machines. Engineered for demanding milling, boring, and CNC routing applications, this precision collet delivers consistent clamping force and minimal runout, making it a reliable choice for professionals working with router bits and CNC tooling across a wide range of materials - from hardwoods and softwoods to aluminum and composites. As a replaceable standard ER40 collet, it fits most tapered spindle noses and is compatible with CMT chucks 183.201, 183.211, 183.221, and 183.310.
Key Features
- DIN 6499 Precision Standard - machined to exact DIN 6499 tolerances for minimal runout, ensuring accurate, repeatable tool positioning in every operation.
- ER40 Collet System - fits the widely adopted ER40 chuck format, giving you broad compatibility with most tapered spindle noses and reducing the need for multiple toolholding systems.
- 5/8" (15.87mm) Shank Diameter with 16mm Bore - sized precisely for 5/8" tooling, providing a secure, vibration-resistant grip on router bits and CNC cutting tools during high-speed operations.
- Replaceable Design - standard ER40 collet format means worn collets can be swapped out individually without replacing the entire chuck, reducing long-term tooling costs.
- Compatible with CMT Chucks 183.201 / 183.211 / 183.221 / 183.310 - works seamlessly within the CMT chuck ecosystem for a matched, precision-fit toolholding setup.
- Wide Collet Range Compatibility - part of a replaceable ER40 collet series spanning 3mm to 25mm, making it easy to build a complete, versatile collet set for diverse CNC tooling needs.
Why This Product
- Shops running CNC routers or machining centers that need consistent, repeatable accuracy will benefit from this collet's DIN 6499 precision ground construction, which helps maintain tight tolerances across production runs in wood, MDF, plywood, aluminum, and composite materials.
- The ER40 format fits most tapered spindle noses, making this collet a practical choice for machinists who want a single toolholding standard that works across multiple machines and setups.
- Because it is a replaceable standard collet, individual worn collets can be replaced without retiring the entire chuck assembly - a practical advantage for high-volume operations where toolholding components wear over time.
- With compatibility across the CMT 183-series ER40 chucks, this collet integrates directly into an established CMT toolholding system, ensuring a matched, precision-verified fit rather than a generic substitution.
Specifications
- Manufacturer Part Number: 184.162.00
- Brand: CMT Orange Tools
- Collet System: ER40
- Shank Diameter: 5/8" (15.87mm)
- Bore Diameter: 16mm
- Standard: DIN 6499
- Clamping Tolerance: 0.015mm
- Compatible Chucks: CMT 183.201, 183.211, 183.221, 183.310
- Collet Range: 3mm to 25mm (full ER40 replaceable series)
Approved Applications
- CNC Routing
- Boring
- Milling
- Use with CNC Routers, Machining Centers, and Point-to-Point Machines
- Compatible Materials: Hardwood, Softwood, MDF, Plywood, Composite, Aluminum
Frequently Asked Questions
What chuck systems is this ER40 collet compatible with?
This collet is designed for use with CMT ER40 chucks, specifically models 183.201, 183.211, 183.221, and 183.310. It also fits most tapered spindle noses that accept the standard ER40 collet format.
What shank diameter does this collet accept?
This collet is sized for a 5/8" (15.87mm) shank diameter, with a bore diameter of 16mm. It is intended for router bits and CNC tools with a matching shank size.
What precision standard does this collet meet?
This collet is manufactured to the DIN 6499 precision standard with a clamping tolerance of 0.015mm, ensuring low runout and high tool accuracy for demanding CNC routing, milling, and boring work.
Can this collet be used as part of a larger ER40 collet set?
Yes. This is a replaceable standard ER40 collet, and the full CMT ER40 replaceable collet series covers a range from 3mm to 25mm, making it straightforward to build out a complete set for a variety of tooling diameters on the same chuck system.
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