Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - Metric - M9 x 1.25

Baer Heli Coil Tap - M9 x 1.25 Bottoming Tap for Heli-Coil Wire Insert is the precise, durable tool you reach for when repairing or reinforcing threaded holes with Heli-Coil wire inserts. Built to perform, this metric tap delivers clean, true threads every time, ensuring wallets of bolts seat securely and removal remains effortless.

Why this Heli Coil Tap stands out

• Bottoming design for true depth in blind holes: The bottoming geometry extends threading all the way to the base, producing a complete, consistent thread that accepts a helicoil insert without partial engagement. This is essential for restoring strength in enclosed cavities and threaded components.
• Metric precision with a proven insert size: M9 x 1.25 is a common standard for Heli-Coil reinforcements, making this tap a reliable choice when your project requires a precise, insert-ready hole.
• Oversized STI tap philosophy for insert compatibility: STI taps are designed slightly oversized to accommodate the wire insert after installation, ensuring the hole finishes at the correct diameter for a secure fit. This approach reduces guesswork and rework.
• Durable construction for repeated use: Crafted from high-speed steel (HSS) with solid flutes, this tap is built to withstand the demands of professional repair work and long service life in metal, automotive, and industrial applications.
• Designed for Heli-Coil wire inserts: The tap creates the correct thread form that works seamlessly with helicoil inserts, restoring original thread strength and enabling reliable fastener performance even after damage.

Practical use cases

• Automotive engine blocks, cylinder heads, and transmission housings where threads wear or strip.
• Machinery, equipment housings, and aluminum components that require durable, repairable threads.
• Repairs in OEM housings or aftermarket assemblies where maintaining original thread size is critical for performance.

How this tap helps you achieve better results

• Restore original strength by creating a clean, accurately sized thread for the helicoil insert, eliminating pull-out risk under load.
• Reduce downtime with a reliable, repeatable tapping process that minimizes hiccups during repairs.
• Versatility across metals—from steel to aluminum—thanks to the robust HSS construction and precise geometry that maintains thread integrity.

Tips for best results

• Follow insert manufacturer guidance for drill size and insert depth to ensure optimal engagement with the restored thread.
• Always deburr the hole after tapping to prevent copper or aluminum chips from compromising insert seating.
• Use a tapping lubricant to extend tool life and improve cut quality in tougher materials.

Whether you’re stocking a shop, tackling a one-off repair, or maintaining precision assemblies, the Baer Heli Coil Tap M9 x 1.25 Bottoming Tap delivers reliable, insert-ready threads that stand up to real-world use. It’s the deliberate, durability-focused choice for professionals who demand long-lasting thread repairs and reinforced fastener seats.