Product Specifications:
When your workpiece is large – a 6" shaft, a heavy hydraulic piston, or a thick die block – you need a center drill that can handle the mass without breaking. This HSSE R‑type center drill is built for that job. The 5mm tip cuts a robust starter hole, while the 60° cone creates a precise center seat for subsequent turning between centers or grinding.
The R‑type protective radius is not a design afterthought: it acts as a shoulder that prevents the drill from going too deep, protecting the finished outer surface of your part. This is especially valuable when you have already turned the workpiece to final diameter and need to add a center hole without marring the surface. With a 13.2mm cone length and an overall cutting length of 21.78mm per end, you have plenty of fresh edge before re‑sharpening.
Double‑end configuration means you get twice the tool life from a single holder, cutting downtime and tool cost. The 12.5mm straight shank fits standard ER collets and end mill holders. HSSE with 5% cobalt offers improved red hardness over plain HSS, allowing higher speeds when drilling tough materials like 304 stainless or 4140 alloy steel. For heavy‑duty centering where precision and surface protection matter, this R‑type center drill delivers.
Available for OEM orders with custom tip diameters, shank sizes, or left‑hand version. Replace your worn‑out center drills with this heavy‑duty performer.
📏 Standard sizes are shown in the charts above. For non‑standard diameters, lengths, or shank configurations, custom sizes are available – simply provide your requirements.
