GAETANO CAPORALI Cooled Collets ERC16 with holes for external cooling and sealed by neoprene inserts DIN ISO 15488 (DIN6499) - Collets diameter D3 ÷ D7 x1mm
(Incl. Tax: €45.20)
The ER16 sealing collets with neoprene inserts and external coolant holes, compliant with DIN ISO 15488 (DIN 6499), are designed for high-precision CNC machining applications requiring efficient coolant control. The four frontal holes direct coolant precisely to the cutting area, improving cooling efficiency, chip evacuation and tool life. With runout accuracy up to 0.008 mm, 0.1 mm clamping progression and a maximum coolant pressure of 25 bar, these collets are ideal for milling, drilling and precision machining operations.

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The ER16 sealing collets with neoprene inserts and external coolant holes, manufactured according to DIN ISO 15488 (DIN 6499), are designed for high-precision tool clamping in CNC machining centers, milling machines and high-performance machine tools.
These collets feature a sealing system with a neoprene insert positioned in the 30° cone, ensuring effective coolant sealing and preventing fluid leakage. The coolant is directed toward the cutting zone through four frontal holes, allowing optimal cooling, lubrication and chip evacuation during machining operations.
The collet structure is designed with a 4+4 segment configuration, providing high rigidity and uniform clamping force distribution. This design ensures excellent performance and an average runout accuracy up to 0.008 mm, enabling stable machining even at high spindle speeds.
The collet offers a clamping progression of 0.1 mm, allowing precise matching with the tool shank diameter. To ensure proper coolant sealing, the tool shank diameter must correspond to the nominal diameter of the collet and must be inserted along the entire clamping length.
The maximum coolant pressure allowed is 25 bar, ensuring efficient cooling even in demanding machining operations. However, it is recommended to adjust the working pressure according to the tool diameter and machining conditions.
ER16 sealed collets are particularly suitable for milling, drilling and precision machining operations, where stable cutting conditions and extended tool life are required.
Due to their reliability and clamping precision, these collets are widely used in industries such as automotive manufacturing, precision engineering, tool production and high-performance CNC machining.
Tadaah supplies high-quality technical components designed to ensure reliable performance, excellent clamping precision and optimal machining efficiency.

Technical Data — ER16 Sealed Collets DIN ISO 15488 (DIN 6499)
| Parameter | Value |
|---|---|
| Standard | DIN ISO 15488 (DIN 6499) |
| Collet type | ER16 |
| Taper angle | 8° |
| Diameter A | 16 mm |
| Diameter B | 17 mm |
| Length L | 27.5 mm |
| Dimension H | 10.6 mm |
| Tool diameter range | 1 – 10 mm |
| Clamping range | 0.1 mm |
| Average runout accuracy | ≤ 0.008 mm |
| Maximum coolant pressure | 25 bar |
| Sealing system | Neoprene inserts in 30° cone |
| Coolant holes | 4 frontal holes |
| Cooling type | External tool cooling |
| Rigidity | 4+4 sector slots |
| Usage | Tools with nominal shank fully inserted |
- Brand:
- GAETANO CAPORALI
- Typology:
- ER Cooled holes
- Size:
- ER16 - 426E