Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - Metric - M27 x 1.5

When a hole loses its grip, you need a tap that delivers precision, durability, and lasting repair strength. The Baer Heli Coil Tap is the trusted tool for creating clean, true threads for wire thread inserts, designed to restore and reinforce threaded holes with confidence. Built for metric applications, this tap targets M27 x 1.5 threads with pinpoint accuracy, making it the go-to choice for professional repairs and high-demand assemblies.

Key features and how they matter:

• Bottoming tap design (STI): reaches the full depth of blind holes, ensuring the insert threads engage completely and evenly for maximum pull-out and torque resistance.
• Metric precision M27 x 1.5: exact thread form for compatibility with common helicoil/wire thread insert systems and the components you rely on.
• High-speed steel (HSS) construction: engineered for durability under load, delivering consistent thread quality across repeated use.
• Clean starting and true alignment: a sharp, well-supported tip minimizes walking and chatter, reducing damage to workpieces.
• Repair and reinforcement in one system: pair this tap with the matching wire thread inserts to restore damaged threads or add reinforced threads in soft or hard metals alike.
• Versatile, mission-critical use cases: ideal for automotive blocks and housings, motorcycle frames, aerospace brackets, and machinery where reliable threaded repairs are essential.

Who benefits most from the Baer Heli Coil Tap? machinists, automotive technicians, engine builders, and serious DIY enthusiasts who demand durable, long-lasting thread repairs. It’s especially valuable when you’re dealing with stripped or oversized holes and you want to restore original strength without oversized inserts or risky repairs.

Why this tap stands out against alternatives: it’s purpose-built for helicoil-style inserts, providing full-depth engagement and precise thread formation that translates into predictable torque loads and fewer reworks. The result is confidence you can hear when the fasteners bite cleanly and stay secure, even under vibration, heat, or heavy duty cycling.

Pro tips for best results: confirm your hole size with the correct drill, deburr thoroughly, lubricate the tap to reduce friction, and work steady with even pressure. After tapping, clean the hole to remove chips before installing the wire thread insert, and follow the insert kit’s alignment guidelines to ensure a flawless repair or reinforcement every time.