
〜 ■ N+RZ/N-RZ are the forming taps suitable for ferrous materials such as carbon steels, alloy steels, and normal steels. Oxide Recommended Tapping Speeds depending on Materials ・Product symbol is distinguished depend on the size. N+RZ 〜M6 (coarse thread) Low carbon steels Medium carbon steels
| 低炭素鋼 | 中炭素鋼 | 〜M6 (fine threads), | |
| 5 15 | 5 15 | N−RZ |
M7〜, all U, all STI (m/min) (m/min) TYPE:1