Expertly engineered for high-precision sizing and finishing paths in rigorous production environments, the Guhring H7 Tolerance Chucking Reamer range is the definitive industrial choice for achieving flawless dimensional accuracy. Spanning a comprehensive sizing spectrum from 4.0mm up to 1 inch, these premium cobalt-alloyed high-speed steel (HSS-E) machine reamers are precision-ground to strictly comply with international H7 tolerance limits, ensuring exact-match clearances for dowels, bearings, and critical shaft fits. The advanced multi-flute geometry delivers an exceptionally smooth shearing action that completely eliminates chatter, sweeps away microscopic margins, and corrects hole roundness. Optimized for seamless integration into standard CNC collet chucks and conventional machine setups, these high-performance chucking reamers deliver exceptional tool life and mirrored surface finishes across tough structural materials, including structural steels, mild steel, AS/NZS 3678 250 and 350 grade plate, free-cutting steels, and unalloyed case-hardened steels.

HSS TECHNICAL DATA

• Tool Material - HSS-E
  
• Standard - Din 212-2
• Guhring No. 468 & 5004
• Tolerance - H7
• Helix angle - 8 deg