Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - UNC - 3/8 x 16

Baer Heli Coil Tap is a precision-built tool designed to deliver flawless internal threads for wire thread inserts and Heli-Coil reinforcements. This bottoming tap (STI) is engineered to cut clean, full-depth threads in 3/8 x 16 UNC holes, providing a rock-solid foundation for insert seating and durable thread restoration in a range of metal substrates.

Why this tap stands out

• Exact UNC 3/8 x 16 threads: taps precisely match standard insert sizes, ensuring reliable engagement and repeatable results every time.
• Bottoming design (STI): engineered to reach the full thread depth, even in blind or recessed holes, so inserts sit flush and secure.
• Durable construction: manufactured from high-grade steel with a precise ground finish for smooth cutting, reduced chatter, and extended tool life.
• Specialized for wire thread inserts: optimized geometry creates clean, burr-free threads that accept helicoil inserts and other coil-thread solutions without cross-threading.
• Versatile material compatibility: ideal for steel, cast iron, and many aluminum alloys commonly found in automotive, industrial, and machinery applications.

Who benefits most

• Machinists and maintenance technicians who repair stripped or damaged threads in housings, brackets, and load-bearing components.
• Automotive enthusiasts and shop crews performing field repairs or factory refurbishments requiring dependable, repeatable thread restoration.
• DIY hobbyists who demand professional-grade results from a single, purpose-built tool.

Practical usage tips

• Keep the hole clean and free of debris; use a light cutting oil to reduce friction and extend tool life.
• Start with steady, even pressure and moderate speed to establish clean engagement; avoid forcing the tap to prevent thread distortion.
• Periodically back off to break chips and prevent binding; progress to full depth with the bottoming design for a true, flush seat for the insert.
• After tapping, Chamfer the hole edges if needed and test-fit the wire insert to confirm proper seating and alignment.

Investing in the Baer Heli Coil Tap means you’re equipping your shop with a reliable, repeatable solution for thread repair and reinforcement. It’s the smart choice for professionals who demand accuracy, durability, and consistent results when installing wire thread inserts in critical components.