The Vortex 5C Imperial Lathe Collet, Round Bore, 5/8", is built for machinists who customize bore sizes on 5C lathes. This soft collet is designed to be bored to a precise size, depth, taper, or shape to match your component, then reused as your project evolves. Inner bore capability: Round bore intended to be bored to your exact size, with a 5/8" nominal starting point to fit custom parts. 13–15 micron runout: High-concentricity performance for precise boring operations on small to medium parts. Re-borability: Soft collet design that can be bored to a specific size, depth, taper, or shape and re-bored multiple times for larger parts. Open-bore pins: Pins keep the collet open during the boring process and are retained for repeated use, improving consistency. 5C lathe compatibility: Specifically designed to work with standard 5C lathe collet chuck setups, ensuring reliable mounting and alignment. Reuse-friendly design: The bore can be adjusted as your parts change, reducing the need for multiple fixed-size collets in your shop. Ideal for machinists who prototype or run small-batch production, this collet lets you tailor inner diameters with precision and reuse the same tool as your designs evolve. The combination of tight runout, bore-tunability, and pins for repeatable boring makes it a practical choice for creating custom shafts, bushings, and mandrels on a 5C lathe without sacrificing accuracy.