Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - BSF - 3/4 x 12

The Baer Heli Coil Tap is a precision bottoming tap engineered for flawless BSF 3/4 x 12 thread creation when installing BaerCoil wire thread inserts. Built from durable HSS-G steel and ground for accuracy, this tap delivers clean, oversize threads that provide the perfect seat for helicoil inserts and a secure, long-lasting repair in a single operation.

why this tap matters

• Accurate oversize threads for inserts: Creates a dedicated holding thread that matches BaerCoil BSF 3/4 x 12 wire inserts, ensuring reliable engagement and torque transfer.
• Bottoming capability: As a true bottoming tap, it reaches the full depth of blind holes, leaving no undercut doing the job of securing critical fasteners and inserts.
• Durable, trusted material: HSS-G construction delivers long wear life in steel, cast iron, and many aluminum applications, with debris-shedding geometry to minimize binding.
• Professional results, fewer retries: Precise flute geometry and reliable cutting action reduce runout and cross-threading, so repairs stay true and repeatable.

who is this for

Perfect for machinists, automotive technicians, maintenance pros, and shop professionals who routinely repair stripped BSF 3/4 x 12 threads or install helicoil inserts. It’s an essential tool in any thread-repair or reinforcement kit, especially when blind-hole strength matters in critical components.

use cases and scenarios

• Repairing damaged BSF 3/4 x 12 threads in engine blocks, housings, or timing covers where helicoil inserts are needed for restored fastening strength.
• Preparing a clean, insert-ready bottom in serviceable housings or brackets that require a secure thread for a long-term repair.
• Creating a reliable thread foundation before installing BaerCoil wire thread inserts in metal parts with limited access depth.

tips for the best results

• Use appropriate tapping fluid and work with a low-to-moderate feed to minimize heat and work hardening.
• Ensure the hole diameter and drilling parameters match the insert specification before tapping.
• Keep the tap straight and true; back off periodically to clear chips and prevent binding.
• After tapping, check the fit of the BaerCoil insert to confirm full-depth engagement and alignment.

Upgrade your thread repair kit with the Baer Heli Coil Tap to achieve durable, precise BSF 3/4 x 12 threads that reliably accept wire thread inserts—and do it with confidence the first time.