OSG Introduces A-SFT-H42 Spiral Tap for Medium-Hardness Steel
TOYOKAWA, Aichi, Japan, Nov. 5, 2026 — OSG Corporation today announced the release of the A-SFT-H42, a spiral flute tap specifically designed for machining medium-hardness steels around 40 HRC. Engineered to address the challenges of rapid tool wear and difficult chip control, the A-SFT-H42 delivers enhanced durability, stable machining performance and longer tool life, helping manufacturers improve productivity and operational efficiency.
When tapping medium-hardness steels around 40 HRC, tool wear tends to accelerate while chips can become stringy and difficult to control, increasing the risk of chip entanglement, machine stoppages and inconsistent machining performance. The A-SFT-H42 addresses these challenges through a flute geometry specifically optimized for medium-hardness steel machining. This specialized design improves cutting performance and durability, enabling longer tool life and more stable threading operations.
The A-SFT-H42 also features an optimized shank length that helps suppress chip entanglement and promotes smooth chip evacuation. By reducing the likelihood of chips wrapping around the tool, the tap minimizes machine interruptions and supports more reliable, continuous machining. Fewer stoppages contribute to improved operational efficiency and higher productivity, while also supporting labor-saving manufacturing initiatives.
To further enhance performance in demanding applications, the A-SFT-H42 is equipped with OSG’s highly wear-resistant V Coating. This advanced coating technology improves resistance to wear and helps maintain stable cutting performance over extended production runs, contributing to longer tool life and lower tooling costs.
By combining a flute geometry optimized for medium-hardness steel machining, effective chip control and a highly wear-resistant coating, the A-SFT-H42 provides manufacturers with a reliable tapping solution for steels around 40 HRC. The result is longer tool life, improved process stability and increased productivity in a wide range of machining applications. The A-SFT-H42 is available in sizes ranging from M3 to M12.
For more information on OSG’s A-SFT-H42 spiral tap for medium-hardness steel
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