ANBCD5OFSTOversize Spiral Flute Tap UNF 5OFST已售出0個The 5OFST is a French-brand oversize spiral flute tap built from HSS-EX high-speed steel, cutting UNF (Unified Fine) threads slightly larger than standard — ideal for leaving clearance for plating, compensating for hole shrinkage so screws seat cleanly, or enlarging existing threaded holes. Its spiral flutes pull chips back toward the shank, keeping the hole bottom clear, making it especially suited to blind (non-through) holes. Available in 20 sizes (thread 1/4~5/8, 18~32 TPI, thread length 2.5×dia). A TiN coating adds a hard golden film for better wear and anti-galling, extending tool life. Suitable for carbon and alloy steel, stainless steel, cast iron, non-ferrous metals like aluminium and copper, workpiece hardness up to HRC45. French brand, consistent quality.
商品分類
標籤
Oversize Tap
Shrinkage Prevention
Product Overview: HSS Oversize Tap Spiral Flute UNF – 5OFST Series
【Product Features & Why We Recommend It】
- French Brand Professional Quality: Originating from a professional French cutting tool brand with rigorous quality control — recommended for users with high demands on UNF fine thread blind hole repair oversize tapping and undersized hole prevention.
- UNF Fine Thread Oversize Spiral Flute Blind Hole Repair Dedicated Design: Features a spiral flute oversize tap geometry that pulls chips upward and out of the hole — with a thread diameter specification larger than standard taps, recommended for UNF fine thread blind hole repair and oversize machining after thread stripping, while also recommended for undersized hole prevention prior to tapping to ensure UNF fine thread dimensions meet North American standard requirements after tapping, where the spiral flute design makes it better suited for blind hole repair applications than the spiral point version, and the fine thread repair design ensures repaired thread strength superior to UNC coarse threads.
- HSS-EX Ultra-High Performance Substrate: Manufactured with HSS-EX ultra-high performance high-speed steel, with maximum machining hardness up to HRC45 — delivering superior hardness, toughness, and wear resistance compared to standard HSS and HSS-CO, recommended for long-duration stable UNF fine thread spiral blind hole repair tapping across various materials.
- TiN Coating Enhancement: The surface is treated with TiN coating, providing good wear resistance and heat resistance — recommended for continuous UNF fine thread oversize spiral blind hole repair tapping of carbon steel, stainless steel, cast iron, and non-ferrous metals, effectively extending tool change intervals.
- 20 UNF Specification Wide Coverage: Available in thread diameter 1/4–5/8 inch and pitch 18–32 TPI across 20 specifications — recommended as the high-performance stock tool for UNF fine thread blind hole spiral oversize repair tapping in factories and maintenance centers, covering thread repair and undersized hole prevention needs for common North American fine thread specification workpieces.
【Machining Applications & Uses】
- Primary Use: UNF fine thread blind hole stripped thread repair and oversize tapping, blind hole undersized hole prevention tapping, and North American fine thread specification damaged threaded hole functionality restoration.
- Recommended Work Materials:
- P-Class (Carbon Steel / Alloy Steel): Structural steel, carbon steel, and alloy steel — recommended for hardness below HRC45, where HSS-EX combined with TiN coating delivers stable UNF fine thread spiral oversize blind hole repair tapping performance.
- M-Class (Stainless Steel): SUS304, SUS316, and other high-toughness stainless steel — the spiral flute design effectively manages continuous chip upward evacuation, recommended for use with appropriate cutting fluid.
- K-Class (Cast Iron): Cast iron and gray iron — the TiN coating provides outstanding wear-resistant UNF fine thread blind hole repair tapping tool life.
- N-Class (Non-Ferrous Metals): Aluminum alloys, pure copper, brass, and other non-ferrous metals — the spiral flute design ensures smooth blind hole chip evacuation, preventing built-up edge from affecting UNF fine thread repair quality.
