Magafor Reamer - Spiral Flute - Straight Shank - HSS-E - 4.21mm

Magafor Reamer - Spiral Flute - Straight Shank - HSS-E - 4.21 mm is a precision finishing tool designed to bring drilled holes to exact size with a smooth, burr-free finish. Ideal for engineers, machinists, technicians, and hobbyists, it fits standard drill chucks and collets, making it a reliable choice for precise hole finishing at a 4.21 mm nominal diameter.

Manufactured from HSS-E (M35 cobalt content) for enhanced wear resistance, this reamer uses a left-hand spiral flute and right-hand cutting to deliver controlled material removal and effective chip flow. DIN 212-B tolerance D = 0 + 0.004 mm ensures consistently tight holes, so you can trust the result across parts and operators.

• Precise, repeatable hole finishing: The DIN 212-B tolerance D = 0 + 0.004 mm ensures every hole finishes within tight limits, reducing the need for secondary reaming or finishing steps.
• Durable HSS-E with cobalt: M35 cobalt-infused substrate delivers longer tool life and maintains sharpness when reaming steels and alloys.
• Efficient cutting geometry: Left-hand spiral flute paired with right-hand cutting promotes smooth cutting, effective chip evacuation, and consistent bore quality with minimal chatter.

This reamer helps you standardize bore quality across projects, speeds up workflow, and reduces downtime. Its combination of material durability, tight tolerances, and robust construction provides reliable results for production runs and single-item jobs alike—giving you confidence to finish precision holes on time, every time.