STI HexTap for installation of solid thread inserts for M18x1.5 oxygen sensor thread HSS-G - M 18 x 1.5

The abbreviation STI stands for "Screw Thread Insert". An STI tap is a specialized tool that does not cut the final thread size like a conventional tap. Instead, it cuts an oversized thread into a pre-drilled hole. A solid thread insert (often a wire coil) is then screwed into this oversized thread. This thread insert then creates the new, correct, and durable thread in the original nominal size (in this case M 18 x 1.5). This procedure is the first choice when the original thread is damaged and a durable repair is required, as is often the case with oxygen sensor threads.

The V-COIL STI HexTap is intended for use in well-machinable materials up to 900 N/mm², including thép không hợp kim và thép hợp kim thấp.

Follow these steps to precisely repair or clean an oxygen sensor thread:

1. Preparation: Drill the damaged oxygen sensor thread to the core diameter suitable for the tap. Use a Mũi khoan with the diameter specified by V-COIL. The hole must be clean and deburred. For simple làm sạch ren, drilling is not necessary.
2. Clamping: Thanks to the Multi-Drive drive (internal square 6.3 mm and external hexagon 14 mm), you can use the HexTap with either a ratchet, an angled screwdriver, or an open-end wrench. Choose the most suitable tool for your working area.
3. Cutting: Cut the STI thread into the prepared hole. Make sure to guide the tool straight to ensure a clean cut. Use cutting oil to minimize friction and extend the tool's life.
4. Insertion: After cutting, the thread insert bushing is screwed into the STI thread using the appropriate tool (installation spindle or insertion tool).
5. Completion: The new, repaired oxygen sensor thread is now ready for the oxygen sensor.