Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - BSF - 5/16 x 22

The Baer Heli Coil Tap is purpose-built to create clean, precise threads that lock in high-strength wire thread inserts. Designed for BSF 5/16 x 22 inserts, this oversize tap ensures your BaerCoil BSF insert seats securely with the right engagement and load distribution. Crafted from high-speed steel (HSSG) and finished for durability, it stands up to repeated use in demanding repair work.

Key features that matter in real-world repairs

• Oversize tap for inserts:cut threads that perfectly accommodate BaerCoil BSF 5/16 x 22 wire thread inserts, delivering reliable grip and long service life.
• Short machine tap design: compact, easy to control in tight spaces and on the shop floor, reducing setup time and improving accuracy.
• HSSG construction: high-speed steel, ground for precision, built to resist wear and maintain sharp cutting edges through many taps.
• Bottoming profile: enables full-depth threads to the bottom of blind holes, ensuring complete insert seating and consistent pull-out resistance.
• Specifically matched to BSF 5/16 x 22: aligns with British fine-thread standards, providing a proven path to durable repairs in a wide range of materials.

In practical terms, this tap is the companion tool you reach for when you need to repair or reinforce stripped threads with wire thread inserts. The oversize geometry means you cut the exact thread form that the insert requires, so you don’t have to guess whether the insert will bite or spin. This translates to faster repairs, fewer callbacks, and components that can handle higher torque loads in service.

Why this tap matters for your workflow

• Reliability under load: a properly tapped hole paired with a BaerCoil BSF insert delivers improved clamp force and resistance to thread stripping in vibration-rich applications.
• Versatility across materials: ideal for automotive, machinery, and general mechanical repairs where threads wear or strip, whether in aluminum, steel, or other common substrates.
• Consistent results: bottoming tap ensures full thread depth every time, so every insert seats identically and performance remains predictable over time.
• Simple integration with BaerCoil system: designed to work hand-in-hand with BaerCoil BSF inserts, enabling a complete, durable restoration workflow from drilling to final seating.

Who benefits most: machinists, service technicians, and DIY enthusiasts tackling damaged internal threads in engines, transmissions, suspension components, or machinery housings. If you’re rebuilding or reinforcing critical joints where thread failure would be costly, this tap helps you achieve a robust, repeatable repair that lasts.

How it stacks up against alternatives: while standard taps can create a usable thread, the Baer Heli Coil Tap is engineered specifically for the BSF 5/16 x 22 insert format, offering an oversize profile that guarantees a secure insert seating and a clean, true thread for high-strength repairs. The combination of HSSG material, short form, and bottoming geometry means fewer mis-taps, more consistent depth, and better performance in tough applications.

Usage tips for best results:

• Use a light-cut approach with cutting fluid to reduce heat and extend tap life.
• Secure the workpiece firmly to prevent deflection while tapping.
• Deburr and clean the hole before tapping to ensure clean engagement of the insert.
• Tap to the bottom of the hole with the bottoming profile to guarantee full thread depth for the insert.

Included image shows the Baer branding and product design from a representative view, reflecting the tool’s solid, all-purpose build that machinists trust for precision work.

Dimensions and standards at a glance: BSF 5/16 x 22 thread form, compatible with BaerCoil BSF inserts, and built as a high-quality HSSG bottoming tap for durable, repeatable thread creation in a single operation. This is the tap you rely on when repairing function-critical holes that demand dependable engagement and longevity.