Toolex Reamer - Stub Type - Spiral Flute - Straight Shank - HSS-E - H4 - 12.78mm

The Toolex Stub-Type Spiral Flute Reamer, 12.78 mm diameter, uses HSS‑E (M35 cobalt) for a durable, wear‑resistant bore finishing tool. Its left‑hand spiral flute and right‑hand cutting deliver controlled material removal and a smooth bore across a range of steels and alloys. Designed for engineers, machinists, and workshop professionals, the stub form with straight shank keeps the tool rigid in collets and fixtures for repeatable results.

Key specs for reliable performance include DIN 8089 compliant geometry and ISO H4 tolerance, ensuring the finished hole stays within tight limits. The reamer is manufactured to order by Toolex Ltd, with a standard despatch window of 24–48 hours; if marked as in stock, that refers to blanks ready to be machined to your size. The 12.78 mm diameter is suitable for precise fits and close‑tolerance assemblies in production or repair work.

• Left-hand spiral flute, right-hand cutting: Efficient chip evacuation and a smoother, more consistent hole finish in a variety of materials.
• HSS‑E (M35 cobalt) substrate: High hardness and wear resistance for longer life and repeatable results, even in tougher metals.
• DIN 8089 / ISO H4 tolerance, 12.78 mm, straight shank: Precise sizing with straightforward mounting in standard toolholders for reliable, repeatable bore quality.

With this reamer, you’ll achieve precise, clean holes consistently, reducing rework and improving fit in assemblies. The rugged HSS‑E body withstands production environments, while the stub length and straight shank simplify setup and reduce chatter. Because Toolex manufactures to order, you’re getting the exact 12.78 mm size with the specified tolerance, and your order ships within 24–48 hours, helping you keep production on schedule.