
■ Stable tapping in thermal refined steels (~35HRC).
High carbon steels Alloy steels Thermal re ned steels
10〜30 10〜30 10〜20
~35HRC For icon explanation, refer to P.50
Segment:1J
| Size | Class | Code | Chamfer | L (mm) | ℓ (mm) | ℓn (mm) | ℓs (mm) | Ds (mm) | K (mm) | ℓk (mm) | Lobe | Type | Stock |
| M6×1 | G8 | RY6.0M8OCTP RY6.0M8OCTB | 4P 2P | 62 | 11 | 26 | 33 | 6 | 4.5 | 7 | 5 | 1 | ◎ |
| M8×1.25 | G8 | RY8.0N8OCTP RY8.0N8OCTB | 4P 2P | 70 | 12 | - | 36 | 6.2 | 5 | 8 | 6 | 2 | ◎ |
| M10×1.5 | G8 | RY010O8OCTP RY010O8OCTB | 4P 2P | 75 | 13 | - | 38 | 7 | 5.5 | 8 | 8 | 2 | ◎ |
| M10×1.25 | G8 | RY010N8OCTP RY010N8OCTB | 4P 2P | 75 | 13 | - | 38 | 7 | 5.5 | 8 | 8 | 2 | ◎ |
| M12×1.5 | G8 | RY012O8OCTP RY012O8OCTB | 4P 2P | 82 | 15 | - | 42 | 8.5 | 6.5 | 9 | 8 | 2 | ◎ |
| M12×1.25 | G8 | RY012N8OCTP RY012N8OCTB | 4P 2P | 82 | 15 | - | 42 | 8.5 | 6.5 | 9 | 8 | 2 | ◎ |
| M14×1.5 | G9 | RY014O9OCTP RY014O9OCTB | 4P 2P | 88 | 18 | - | 45 | 10.5 | 8 | 11 | 8 | 2 | ◎ |
Number of oil grooves : M6=5, M8=6, M10 and larger=8 For M6 and smaller, external centers of 2 thread chamfer taps are removed.