Expertly engineered for high-precision manual sizing and correction paths, the Guhring H7 Tolerance Hand Reamer range is the definitive industrial choice for achieving flawless dimensional compliance on-site or at the bench. Manufactured from premium cobalt-alloyed high-speed steel (HSS-E), these tools feature a square drive shank optimized for secure engagement with standard tap wrenches and manual holders. Each reamer is ground to strict international H7 tolerance limits and features a specialized, long entry taper that provides effortless self-alignment and prevents grabbing as the tool is rotated by hand. The advanced multi-flute geometry distributes cutting forces evenly, removing microscopic stock lines to correct hole roundness and leave a perfect surface finish. This heavy-duty hand finishing range is optimized to deliver exceptional tool life and reliable accuracy across a wide range of structural materials, including structural steels, mild steel, AS/NZS 3678 250 and 350 grade plate, free-cutting steels, and case-hardened steels.

HSS TECHNICAL DATA

• Made from High Speed Steel
• Standard - DIN 206
• Guhring No. 413
• Tolerance - H7
• Helix angle - 8 deg