Expertly engineered for high-efficiency pocket-sinking operations in rigid manufacturing environments, the Guhring Fine Grade Machine Counterbore range is the definitive industrial choice for creating precise recesses for socket head cap screws. Manufactured from premium cobalt-alloyed high-speed steel (HSS-E), these heavy-duty cutting tools feature an integrated pilot pin and advanced multi-flute geometry designed to strictly comply with international fine-fit clearance tolerances. This ensures that fast-moving CNC paths and conventional machining setups generate perfectly flat, square shoulders that allow bolt heads to sit flush or sub-flush without vibration or excessive play. The robust fluting efficiently evacuates compact chips to prevent packing and ensure flawless surface finishes. This fine-grade counterbore range is optimized to deliver exceptional tool life and uniform execution across a vast spectrum of 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

• Made from High Speed Steel
• Standard - Din 373
• Guhring No. 482