Baer Heli Coil Tap – Wire Thread Insert – Bottoming Tap (STI) in Metric, M30 x 3.5. This is the dedicated tapping solution you need when installing Heli-Coil wire thread inserts into large, metric holes. Precision-ground for accuracy and durability, it’s built to deliver clean, true threads that form a reliable foundation for reinforced, vibration-resistant fastenings.

• High-speed steel construction: Sturdy, wear-resistant tap designed to hold its shape under demanding use, ensuring consistent thread quality with every cut.
• Bottoming geometry: Full-depth threads to the tip, ideal for blind or recessed holes where you need the insert to seat flush and lock in place.
• Metric threading M30 x 3.5: Precisely sized for standard Heli-Coil inserts, providing a secure, corrosion-resistant repair or reinforcement for critical components.
• STI compatibility: Engineered to work with common machine taps and wrenches, delivering predictable performance in shop and field environments.
• Controlled tolerances: Finely ground flutes and lands minimize burrs and chatter, reducing post-process steps and helping you get to production faster.

Ideal for automotive, industrial machinery, and aerospace components where damaged or worn threads must be restored with durable, long-lasting reinforcements. This tap isn’t a generic replacement—it’s a purpose-built tool that ensures the insert seats correctly and the surrounding material remains intact, even in high-stress applications.

Practical use and tips

Use with appropriate cutting fluid and steady, clockwise turning to achieve smooth chip evacuation. For blind holes, the bottoming design ensures full thread depth is reached. After tapping, clean the hole thoroughly to remove chips before inserting the Heli-Coil, and follow with the recommended installation tool for optimal grip and load distribution.

Who should consider this tap? Professionals tackling heavy-duty repairs, technicians maintaining fleet vehicles, or engineers performing routine maintenance on equipment where thread integrity is mission-critical. If you’re repairing damaged threads in metric housings, engine blocks, or structural components that demand robust thread reinforcement, this Baer Heli Coil Tap delivers reliable performance you can count on.