Roughing Endmill vs Bullnose Endmill for Steel: Making the Right Cut
Last month, a long-standing US client emailed us about a severe bottleneck. While machining large 4140 pre-hardened steel hydraulic valve blocks (HRC 35–38), their cycle times doubled, and sudden tool chipping repeatedly halted the production line. This scenario represents a classic workshop issue we have resolved across the US and Europe for over a decade. […]
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