Our carbide step drill range produces multiple diameters in one pass with stable cutting and controlled burrs on steel, stainless, aluminum, and engineered plastics. Each solid carbide step bit uses premium sub‑micron carbide. Mirror‑finish surfaces and tight tolerances support repeatable results in demanding CNC work. Custom tools are built to your drawing, machine, clamping, and process requirements.
Sub‑micron edge integrity, rigid substrates, and vibration‑damped geometries keep hole size consistent and steps crisp, even in hard or gummy materials. Automated multi‑axis grinding controls runout over large batches.
Application‑specific carbide grades pair with PVD coatings such as AlTiN, TiAlN, TiSiN, or DLC. This limits built‑up edge, improves chip flow, and allows higher cutting speeds on stainless, alloy steel, aluminum, and composites.
Optimized point angles, step reliefs, and optional chamfer/countersink features deliver clean entries and tight concentricity between steps. Profiles include 2‑step, 3‑step, and composite forming options.
Through‑coolant options and polished flutes evacuate chips in deep holes and sticky alloys. Helix and flute count are tuned for thin sheet, plate, or thick sections to protect roundness and finish.
Every tool is preset and verified for diameter, step length, and runout. ISO9001 and SGS‑backed processes maintain traceable quality from sampling through mass production.
Typical diameter tolerance: h6. Step length tolerance: ±0.05 mm. Total indicated runout commonly ≤0.005 mm at the cutting edge.
Standard step diameters: 2.0–25.0 mm (0.079–0.984 in) with customizable increments and counts. Micro and large sizes are available on request.
Shanks per DIN 6535 HA/HB/HE and ISO standards for ER collets, shrink‑fit, or hydraulic chucks. Precision‑ground shanks support automated presetting.
Common point angles: 118°, 120°, 130°, 140°. Chamfer angles: 60°/90°/120° as required. Optional pilot, deburr, and back‑chamfer features in one tool.
Stainless/alloy steels: AlTiN or TiAlN. Aluminum/non‑ferrous: DLC or uncoated polished flutes. Abrasive composites/cast iron: TiSiN.
Use through‑coolant for deep holes or high heat. Select 2–4 flutes by chip load and wall thickness. Helix is tuned to sheet or solid stock for stable chips and reduced burrs.
A carbide step drill streamlines stack drilling, deburring in process, and multi‑diameter hole sequences.
Edge prep, wear‑resistant coatings, and robust cores support stable penetration and controlled work hardening with clean surfaces.
Sharp edges, DLC or uncoated mirror flutes, and large gullets reduce adhesion and produce bright finishes while protecting thin walls.
Polished, low‑helix or special points limit heat and delamination for accurate steps in plastics and composites.
Share drawings, target materials, machine model, toolholding, and cutting parameters. Engineers optimize geometry and coating, then validate samples with measurement reports.
Integrated countersinks, rivet/bolt seats, and forming combinations consolidate tools and reduce cycle time.
Automated grinding centers and standardized setups enable rapid prototypes and stable lead times, with inspection records for each lot.
Ready for machining centers, drilling/tapping centers, and high‑speed gantry systems under flood or MQL conditions.
Pair with high‑precision collet, shrink‑fit, or hydraulic chucks to minimize runout and extend service life.
Round, concentric holes with controlled entry/exit burrs reduce secondary deburring and improve assembly fit.
Combining pilot, clearance, and countersink in one pass cuts tool changes and cycle time, supporting predictable cost per hole.
Manufacturing runs on TTB, WALTER, DECKEL, and ANCA platforms. Presetting and verification use ZOLLER, PG1000, and PARLEC. ISO9001 (2023–2026) and SGS processes ensure consistent quality; inspection data is available on request.
Provide material, stack‑up, hole sequence, step diameters/lengths, point and chamfer angles, shank type, coolant needs, coating preference, machine model, and clamping method.
Design is confirmed, samples ship with measurement reports, and approved results are replicated in batch runs.
Each tool is individually protected and labeled for safe transport, with global shipment from our Changzhou base.
This category covers solid carbide step drills in metric and inch sizes, from 2‑ to 3‑step with pilot, deburr, and countersink options. Choose ready‑to‑produce designs or request non‑standard profiles with coatings matched to material and through‑coolant for deep or heat‑sensitive work.
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