The Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - Metric - M24 x 3 is a precision-crafted tool built to restore and reinforce critical internal threads with confidence. Designed for use with helicoil (wire thread insert) systems, this tap delivers clean, accurate threads that accept inserts securely and resist wear under demanding service conditions.

Why this tap stands out

• HSS-G construction: Made from high-speed steel with a ground finish for exceptional durability and long life in tough metals, including hardened alloys.
• Bottoming tap geometry (STI):
• Cuts thread all the way to the bottom of the hole, ensuring a complete, full-depth thread path ideal for blind holes and robust helicoil installation.
• Metric precision: M24 x 3 threads, a common standard in automotive, industrial, and machinery applications where reliable interior threads are critical.
• Stable drive interface: Square-drive end provides secure torque transfer with a tap wrench or drill adapter, reducing slippage during cutting.
• Specialized for inserts: Engineered to pair with helicoil inserts for durable thread repairs that resist loosening and provide repeatable performance over time.

Designed for professionals and serious hobbyists alike, this tap is the go-to solution when threads have worn, stripped, or need reinforcement to handle frequent assembly and disassembly. It’s particularly valuable for repairing damaged threads in aluminum blocks, engine components, housings, brackets, and other metric M24 x 3 interfaces where strength matters as much as precision.

Practical use scenarios

• Repairing stripped M24 x 3 threads in engine blocks, cylinder heads, or transmission housings to restore factory strength and service life.
• Reinforcing soft metals like aluminum where repeated disassembly is expected, ensuring consistent thread engagement for helicoil inserts.
• Preparing clean, accurate threads for new helicoil installations in critical components that must withstand vibration and load.

Tips for best results

• Use a compatible cutting fluid to maximize tooth life and achieve a smoother finish.
• Keep the tap perfectly aligned with the hole center to avoid misalignment or cross-threading.
• Cut with steady, even pressure and back off periodically to clear chips for a cleaner thread.
• Verify thread accuracy with a metric thread gauge after tapping and before inserting the helicoil insert.

With the Baer Heli Coil Tap, you’re not just cutting threads—you’re restoring reliability, extending the life of assemblies, and ensuring you have a durable, serviceable solution for threaded connections. It’s the precise, instrument-grade choice for dependable helicoil insert work in demanding applications.