Baer Heli Coil Tap - Wire Thread Insert - Spiral Flute Tap (STI) - Metric - M12 x 1.5

The Baer Heli Coil Tap is the precision tool you reach for when thread repairs must be strong, repeatable, and long-lasting. Designed for metric M12 x 1.5 threads, this Spiral Flute Tap (STI) is purpose-built to pair with wire thread inserts, delivering flawless, insert-ready threads in a wide range of metals and applications.

Built from durable high-speed steel (HSS) and shaped with a spiral flute geometry, this tap excels at chip control and smooth cutting action. The spiral flutes evacuate material efficiently, reducing binding in deep holes and enabling consistent thread formation even in challenging workpieces. The result is clean, true threads that resist work hardening and back-out under load—crucial for reliable helicoil installations and reinforced joints.

Why it matters for repairs and reinforcements: when a thread is damaged or stripped, a precise, Helicoil-compatible tap creates the foundation for a robust coil insert. This tap’s geometry targets accuracy and concentricity, so the insert seats evenly and the repaired hole restores near-original strength. That means you can return critical components to service faster, with confidence that the repaired threads will hold under vibration, torque, and daily wear.

Who benefits: machinists, automotive technicians, maintenance teams, and serious DIYers who regularly perform thread repairs on steel, aluminum, and other common metals. The M12 x 1.5 specification covers a frequently encountered size in many assemblies, making this tap a versatile addition to any repair kit or production lineup.

Compared to generic taps, the Baer Heli Coil Tap is tuned for helicoil-based solutions. Its precise geometry, combined with reliable HSS construction, yields superior thread quality, reduced rework, and a longer tool life in regular repair workflows. This translates to fewer replacements, less downtime, and more consistent outcomes across repeated repairs.

Usage tips to maximize performance: ensure you start the cut square to the hole, use appropriate cutting fluid to minimize heat, and apply steady, moderate pressure as the tap engages. For deeper holes, maintain a clean path by clearing chips periodically and avoid forcing the tap—let the spiral flutes do the work for you. When finished, inspect the threads for uniform depth and finish before installing the coil insert.