Product Specifications:
This 4mm R‑type center drill from the HSSE series is the go‑to size for mid‑range workpieces – think motorcycle shafts, small hydraulic cylinders, or precision mold components. It provides a 4mm starting hole that is deep enough for secure mounting between centers yet avoids excessive material removal. The 60° cone is cut to DIN333, guaranteeing interchangeability with standard lathe centers.
What sets this double‑end tool apart is the thoughtful geometry: a 10.6mm cone length blends smoothly into a 15.7mm total cutting section per end, giving you nearly 50% more usable edge compared to standard economy drills. The protective R10 radius behind the cone acts as a physical stop, preventing the drill from diving too deep and spoiling the finished surface of your part – a frequent issue when adding a center hole after turning.
The 10mm straight shank offers solid damping on CNC lathes and machining centers. HSSE with 5% cobalt handles intermittent cuts and tough materials like stainless steel (304, 316) without softening, while still letting you run higher speeds in aluminum or brass. Double‑ended means you flip it when one end dulls – no tool change needed. For shops that value uptime and consistent centering quality, this R‑type center drill delivers shift after shift.
Custom diameters (from 2mm to 8mm) and left‑hand versions are available for OEM orders. Replace your worn tools with this durable, precisely ground center drill.
📏 Standard sizes are shown in the charts above. For non‑standard diameters, lengths, or shank configurations, custom sizes are available – simply provide your requirements.
