Product Description
The CMT Precision Collet ER32 - 1/2" (12.7mm) is a high-accuracy tool holding collet designed to DIN 6499 standard, built for CNC routers, machining centers, and point-to-point machines that require reliable, repeatable tool clamping. Engineered to accept 1/2" shank tooling, this ER32 collet delivers the precision and consistency that milling, boring, and CNC routing operations demand across hardwood, softwood, MDF, plywood, composite, and aluminum workpieces.
Key Features
- DIN 6499 precision ground construction - meets the internationally recognized DIN 6499 standard for minimal runout, giving you accurate, repeatable tool positioning on every cut.
- ER32 collet system compatibility - fits the widely adopted ER32 standard, making it interchangeable with most tapered spindle noses and compatible with a broad range of CNC chucks including CMT models 183.000, 183.100, 183.200, 183.250, 183.300, and 183.400.
- 1/2" (12.7mm) bore diameter - securely grips 1/2" shank router bits and cutting tools, one of the most common shank sizes in professional CNC and machining center applications.
- Replaceable standard ER32 collet design - individual collets covering the 3mm to 20mm range can be swapped in or out independently, so you replace only what you need rather than the entire chuck assembly.
- 40mm total length - the compact profile contributes to stable tool seating within the chuck body, reducing vibration and supporting cleaner surface finishes.
Why This Product
- If your CNC router or machining center uses ER32 chucks, this collet drops in as a direct-fit replacement - no adapters or modifications needed for most tapered spindle noses.
- The DIN 6499 precision standard means tight tolerances are maintained at the collet level, not just at the spindle, so demanding materials like aluminum and hardwood are routed, milled, or bored with consistent accuracy.
- Because ER32 collets are individually replaceable across the 3mm to 20mm range, you can build out a complete set incrementally - matching each collet to the specific shank diameters your operation requires without purchasing a full new chuck.
- Compatibility with six CMT chuck models (183.000, 183.100, 183.200, 183.250, 183.300, 183.400) means this collet integrates cleanly into an existing CMT toolholding system, keeping setup straightforward and consistent across your shop.
Specifications
- Manufacturer Part Number: 184.127.00
- Brand: CMT Orange Tools
- Collet System: ER32
- Standard: DIN 6499
- Bore Diameter: 12.7mm (1/2")
- Total Length: 40mm
- Compatible Chucks: CMT 183.000, 183.100, 183.200, 183.250, 183.300, 183.400
- Clamping Range: 3mm to 20mm
- Clamping Tolerance: 0.015mm
Approved Applications
- CNC Routing
- Boring
- Milling
Frequently Asked Questions
Which CMT chuck models is this ER32 collet compatible with?
This collet is designed for use with CMT chucks 183.000, 183.100, 183.200, 183.250, 183.300, and 183.400. It also fits most standard tapered spindle noses that accept ER32 collets.
What is the clamping range of ER32 collets, and can I use this collet for other shank sizes?
The ER32 collet system covers a clamping range of 3mm to 20mm across the full set of available collets. This specific collet is sized for a 1/2" (12.7mm) shank diameter. For other shank sizes within the ER32 range, a collet sized to that specific diameter would be required.
What precision standard does this collet meet, and why does it matter?
This collet is manufactured to DIN 6499 standard, which specifies tight dimensional tolerances for ER-type collets. Meeting this standard ensures minimal runout - meaning the cutting tool stays accurately centered during rotation - which directly affects cut quality, tool life, and dimensional accuracy in routing, milling, and boring operations.
What types of machines and materials is this collet suited for?
This ER32 collet is suited for use in CNC routers, machining centers, and point-to-point machines. It supports work in hardwood, softwood, MDF, plywood, composite materials, and aluminum.
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