The Dormer B170 DIN 212 Form B machine reamer is a precise tool designed for machining metal and other materials. With a nominal diameter of 4.02 mm and an overall length of 75 mm, this reamer provides an effective solution for creating fits within tolerances of 4F8 or 4H9. The reamer is made from high-quality HSS-E (high-speed steel) and features a slight left-hand spiral and a cylindrical shank, which enhance handling and machining efficiency. The cutting length is 19 mm, while the working length is 43 mm, allowing for optimal machining depth. This reamer is ideal for machining carbon steel, steel alloys, cast iron, aluminum, and copper alloys, and is suitable for both cast and machined materials.

• Centesimal reamer with a slight left-hand spiral for precise machining
• Diameter tolerance of 0/+0.004 mm for exact fits
• Neck relief for improved chip removal and tool life
• Suitable for a variety of materials, including steel and aluminum
• Designed according to DIN 212 standard for high quality and reliability.