Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - Metric - M12 x 1.25

The Baer Heli Coil Tap is your go-to tool for impeccably repaired and reinforced threads using Heli-Coil wire inserts. Sized for metric M12 x 1.25, this Bottoming Tap (STI) delivers complete thread depth so inserts seat securely and function under load, reducing downtime and increasing part longevity.

Why this Baer Heli Coil Tap stands out

• Precision-ground HSS tooling for clean, accurate thread cutting and long-lived performance in a range of metals.
• Bottoming geometry guarantees full-depth engagement, ensuring the insert sits flush and the threaded hole carries load evenly.
• Robust hex drive design provides a secure, wobble-free drive for steady tapping in confined or awkward spaces.
• Metric accuracy tailored to M12 x 1.25 applications, a common standard across automotive, industrial, and machinery components.

What this means in practice is reliability you can feel. When a threaded hole has stripped or worn threads, a correctly sized Heli-Coil tap like this one lets you restore original strength and return equipment to service quickly. The result is a repair that behaves like a factory-new thread—capable of handling vibration, torque, and repeat fastenings without creeping or pull-out.

Ideal use cases

• Repairing stripped or damaged M12 x 1.25 threads in housings, blocks, and casings
• Reinforcing critical threaded holes in engines, transmissions, and heavy equipment
• Preparing clean, consistent threads for Heli-Coil inserts in repair and refurbishment projects

Practical tips for optimal results

1. Follow the Heli-Coil insert kit specifications for the correct pilot hole size and insert depth.
2. Lubricate with light cutting oil to reduce heat, wear, and work-hardening of the workpiece.
3. Keep the tap perfectly perpendicular to the surface to maintain straight, true threads.
4. Deburr the hole after tapping and before installing the coil insert to ensure smooth engagement.

Built for durability and designed with real-world repair scenarios in mind, the Baer Heli Coil Tap helps machinists, maintenance technicians, and DIY enthusiasts restore threaded holes to their original strength. When you need a precise, dependable bottoming tap for metric thread inserts, this M12 x 1.25 tool delivers consistent results, time after time.