Problem: The Cost of Secondary Finishing
Many industrial workshops suffer from "rough" holes. When a drill produces burrs or an inaccurate diameter, workers have to spend extra time deburring or reaming the hole so that bolts can fit. In high-precision assembly, a hole that is even 0.1mm out of round can lead to structural rejection and massive financial loss.
Cause: Vibration & Asymmetrical Cutting
Inaccurate holes are usually caused by asymmetrical grinding. If one cutting tooth is slightly higher than the others, the tool will "walk" or vibrate. This vibration creates a jagged surface finish and forces the hole to become oversized, making it impossible to achieve a precision fit.
Solution: Full CNC Multi-Cut Geometry
We manufacture our cutters using state-of-the-art 7-Axis CNC grinding centers. This ensures every tooth is perfectly symmetrical. Our unique Three-Stage Cutting Geometry shears the metal in layers, resulting in a mirror-like finish on the hole wall. The precision is so high that secondary deburring is almost never required.
Technical Parameters
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Manufacturing Process: 100% Fully CNC Ground
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Tooth Geometry: Triple-Edge (Internal, Middle, External)
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Diameter Accuracy: +0.02mm / -0.00mm
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Surface Finish: Ra 1.6 - 3.2
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Concentricity: <0.05mm
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Material: HSS-M2 / M35
Application: Precision Assembly & Custom Fabrication
This series is designed for aerospace ground equipment, custom automotive chassis work, and high-end architectural metalwork. It is the preferred choice for labs and medical device manufacturers where every thread and bolt-hole must be perfect.
Selection Guide
When the project specification calls for "Burr-Free" or "Precision Fit," this CNC Ground series is the only choice. It is particularly effective for thinner materials where "tearing" is a common problem with lower-quality cutters.
Professional FAQ
Q: Why does the hole look polished?
A: Our triple-edge geometry cuts the metal cleanly rather than ripping it, which results in a much smoother surface.
Q: Does this help with bolt alignment?
A: Absolutely. The perfect roundness ensures that bolts pass through multi-layered plates without resistance.
Q: Is the shank also ground?
A: Yes, the Weldon shank is precision ground to ensure zero-slip and perfect alignment in the drill chuck.
Product Tags:
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High-Accuracy Metric Core Drill Bits | Perfect Concentricity for Precision Engineering Images
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