✨ Unshakeable Grip, Unrivaled Precision 🔩
Master your heavy-duty machining and large-scale applications with the Snail Tools ER40 Precision Spring Collet. Engineered for maximum stability and demanding spindle systems, this collet delivers a vibration-free, concentric grip that ensures peak accuracy.
Crafted from high-grade alloy spring steel, the ER40-3/8″ model provides uncompromising clamping force, translating into superior surface finishes and dramatically extended tool life. This standard size is perfect for securing professional 3/8-inch shank tools, leveraging the high rigidity of the ER40 system for high-power milling or deep routing operations, while maintaining tight run-out tolerances even under the heaviest load.
The non-slip design and robust construction make this an essential component for any professional workshop utilizing the powerful ER40 spindle system.
| Specification | Detail (Metric – mm) | Detail (Imperial – in) |
| Brand Name | Snail Tools | Snail Tools |
| Part Number | ER40-3/8 | ER40-3/8 |
| Collet System | ER40 | ER40 |
| Clamping Diameter | 9.525 mm | 3/8 in |
| Country of Origin | China | China |
| Package Includes | 1 x Collet | 1 x Collet |
| Model | ER40 | ER40 |




















