Straight Flute Stepped Solid Carbide Drills: Multiple Diameters in One Setup

In many assemblies, one component needs two or three different hole diameters with tight coaxiality. The traditional approach uses multiple drilling passes with repositioning between operations. That increases cycle time, introduces alignment risk at every re-set, and often reduces tool-life because each diameter is interrupted by entry/exit shock.

This custom case uses straight-flute stepped solid carbide drills to machine multiple diameters in one setup. The stepped profile carries each diameter in sequence, while the straight flute design improves chip evacuation from the cutting zone so the flutes can stay productive over the full stack.

We engineer the stepped form around your section geometry: step lengths, transitions, and edge preparation are selected so the drill can enter, cut, and exit cleanly without rubbing at the smaller-to-larger transitions. Substrate grade, flute grind, and runout control are matched to the material and the requested tolerances for each step.

The practical outcome is straightforward: fewer operations, less handling, and more consistent hole-to-hole repeatability. If your print requires multi-diameter holes in one pass, send diameter steps, depth or tool length, material and hardness, and machine spindle limits — we will confirm feasibility and propose the best stepped straight-flute drill configuration.