
The BLF is suitable for deep hole tapping and presents the E following advantages thanks to its geometry with the truncated crests: 1. Elimination of chipping problems at the taps full thread portion. Oxide 2. Good chip ejection. M26~ 3. Reduction of tapping friction. Recommended Tapping Speeds depending on Materials 4. The internal threads are cut by the chamfer and the 1st full thread. The full thread portion follows the internal threads just cut, and
| Free cutting and | Carbon steel and | drives or rotates the tap forward based on the pitch of the threads. |
| structural steel | low alloy steel | Since only half of threads are truncated, the BLF tap does not |
| IS P | IS P | lose its guiding function, making sure that the tap is able to move |
| 5〜10 | 5〜10 | forward following the pitch of the threads. |
(m/min) (m/min) For icon explanation, refer to P.50
TYPE:1 DIN371 TYPE:2 DIN371
TYPE:3 DIN376 TYPE:4 DIN376
Segment:1D
| Size | Class | Code | Chamfer | L | ℓ | ℓn | ℓs | Ds | K | ℓk | No. of | Type Stock |
| (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | flutes |
For Metric Threads M3 0.5 ●
ISO2 SD3.0GANEXJ 2.5P 56 9 18 34 3.5 2.7 6 3 1
M4 0.7 ●
ISO2 SD4.0IANEXJ 2.5P 63 13 21 38 4.5 3.4 6 3 1
M5 0.8 ●
ISO2 SD5.0KANEXJ 2.5P 70 14 25 39 6 4.9 8 3 1
M6 1 ●
ISO2 SD6.0MANEXJ 2.5P 80 15 30 45 6 4.9 8 3 1
M8 1.25 ●
ISO2 SD8.0NANEXJ 2.5P 90 19 35 47 8 6.2 9 3 2
M10 1.5 ISO2 SD010OANEXJ 2.5P 100 23 39 52 10 8 11 3 2
M12 1.75 ●
ISO2 SG012PANEXJ 2.5P 110 26 - 56 9 7 10 3 3
M14 2 ●
ISO2 SG014QANEXJ 2.5P 110 26 - 56 11 9 12 3 3
M16 2 ●
ISO2 SG016QANEXJ 2.5P 110 26 - 56 12 9 12 3 3
M18 2.5 ●
ISO2 SG018RANEXJ 2.5P 125 33 - 64 14 11 14 4 3
M20 2.5 ●
ISO2 SG020RANEXJ 2.5P 140 33 - 71 16 12 15 4 3
M22 2.5 ISO2 SG022RANEXJ 2.5P 140 33 - 71 18 14.5 17 4 3
M24 3 ●
ISO2 SG024SANEXJ 2.5P 160 37 - 82 18 14.5 17 4 4
M27 3 ●
ISO2 SG027SANEXJ 2.5P 160 37 - 82 20 16 19 4 4
M30 3.5 ●
ISO2 SG030TANEXJ 2.5P 180 44 - 92 22 18 21 4 4
M33 3.5 ●
ISO2 SG033TANEXJ 2.5P 180 46 - 92 25 20 23 4 4
M36 4 ●
ISO2 SG036UANEXJ 2.5P 200 52 - 102 28 22 25 4 4
M39 4 ISO2 SG039UANEXJ 2.5P 200 52 - 102 32 24 27 4 4