Omega Products ER40 Collet Standard Precision - 10 Micron Run-Out - 4mm - 3mm

Designed for dependable, everyday precision in small-diameter work, the Omega ER40 Collet Standard Precision delivers consistent clamping within an ER40 collet chuck. Built to the standard ER40 dimensions, it securely grips tools and keeps your machining workflow smooth from setup to finish.

Why this ER40 collet stands out

With a remarkable 10 micron run-out, this standard precision collet minimizes eccentricity during cutting. That translates to truer hole diameters, straighter toolpaths, and noticeably improved surface finishes on small-diameter tools—whether you’re milling, drilling, or light engraving. The 3–4 mm clamp range covers a broad set of common miniature tools, making it a versatile choice for general-purpose machining without sacrificing accuracy.

Core benefits at a glance

• Low run-out: 10 microns ensures concentric grip and better overall part quality.
• Standard precision: reliable, repeatable performance for everyday milling, drilling, and finishing tasks.
• 3–4 mm clamping range: ideal for common small-diameter tools like micro-end mills and small-diameter drills.
• ER40 compatibility: designed to fit standard ER40 collet chucks for quick tool changes and secure retention.
• Durable, consistent grip: engineered to maintain clamping force through routine workshop use.

Ideal use scenarios

Perfect for hobbyists and professionals performing precision work on small tools: machining aluminum or steel with micro-end mills, drilling precise孔s, or engraving delicate features where even slight run-out could affect accuracy. Use in CNC mills or manual machines that accept ER40 collets to achieve repeatable, high-quality finishes.

Practical tips for best results

To maximize accuracy, ensure the tool shank diameter is within the 3–4 mm range and insert evenly before tightening. Keep the collet clean and free of debris after use, and store it in its protective packaging to preserve concentricity over time. Regularly inspect for wear or nicks on the collet slots, as these can influence grip and run-out performance.