Hand Tap Series Spiral Fluted Taps (for blind hole) IHT Hand Taps for General Purpose Spiral Fluted Taps (for through hole) Specification 2D Oxide Spiral Pointed Taps (for through hole) Recommended Tapping Speeds depending on Materials ow carbon steels 〜5 Hand Taps For icon explanation, refer to P.50 Product features How to use IHT ●IHT is for hand tapping and for re-threading, and is used for ●Start tapping after boring holes corresponding to the thread both through hole and blind hole. size by using drills (note: For drill sizes, refer to drill sizes Cemented Carbide Taps ●Use for threading of the iron (SPC or SS400) products used shown in the bored hole size table.) in our daily life. ●On Hand Tapping, operate tapping in an upright position ●Surface treated. Oxidization, the most suitable surface parallel to bored holes by using tap wrenches. treatment for iron products. ●During tapping, please use tapping oil. ●Suitable for internal thread cutting in small quantity, such as Roll Taps tapping of test pieces. ●The 5 thread chamfer is recommended for through holes and 2 thread chamfer is recommeded for blind holes. Special Thread Taps Simple Inspection Tools Pipe Taps Through hole = 5 thread type Blind hole = 2 thread type When hand tapping, always use Machine tapping with drilling tap wrench machine ■Table for bored and drilled hole sizes unit:mm Blister Pack Minor diameter of internal thread size Size Minimum Maximum tolerance Drill size Thread tolerance engagement Thread Mills 6H (2nd class) 7H (3rd class) M3 × 0.5 2.459 2.599 2.639 2.6(2.5) 74%(92%) M4 × 0.7 3.242 3.422 3.466 3.4(3.3) 79%(92%) M5 × 0.8 4.134 4.344 4.384 4.3(4.2) 81%(92%) M6 × 1 4.917 5.153 5.217 5.1(5.0) 83%(92%) fer M8 × 1.25 6.647 6.912 6.982 6.9(6.8) 91%(89%) 5 M10 × 1.5 8.376 8.676 8.751 8.6(8.5) 86%(92%) Dies note1) Recommended drill sizes shown in this table are for internal threads of 7H class(3rd class), and are selected from the standard drills available in the market. note2) Drill sizes shown in brackets in this table are for such case as the drilling has oversize cutting tendency or for internal threads of 6H class(2nd class). Center Drills 【Related products】 Shank adjuster ●For deep hole tappings, please use shank adjusters. ●There is only a one touch motion required to detach and attach the I series taps (IHT/ISP/IPO) from or to the shank adjuster. Centering Tools *For details of shank adjuster, refer to P.545 Obtainable from Video site shown in right JIS HT-1 426 For improvement, spec may change without advance notice.