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Manufacturer number:
Plain shank thread mill with countersinking step 2×D, TiAlN, UNC: 1/4-20
Article no.: 139725 1/4-20
Article code:
- Thread type: UNC; UNC-LH
- Flank angle: 60
- Tool material: Solid carbide
- Shank: DIN 6535 HA with h6
- Through-coolant: yes
Product details
Technical Data
| Thread size | 1/4-20 UNC | |
| Coating | TiAlN | |
| Thread type | UNC; UNC-LH | |
| Flank angle | 60 degrees | |
| Tool material | Solid carbide | |
| Shank | DIN 6535 HA with h6 | |
| Through-coolant | yes | |
| Thread pitch | 1.27 mm | |
| Threads per inch | 20 | |
| Nominal ⌀ DC | 4.7 mm | |
| Shank length Ls | 36 mm | |
| Overall length L | 62 mm | |
| Shank ⌀ Ds | 8 mm | |
| Neck ⌀ D1 | 6.6 mm | |
| No. of teeth Z | 3 | |
| Feed fz in steel < 1100 N/mm2 | 0.018 mm | |
| Application for type of drilling | up to 2×D for blind holes; up to 2×D for through holes | |
| Countersink angle | 90 degrees | |
| Shank tolerance | h6 | |
| Number of clamping slots | 3 | |
| Colour ring | green | |
| Internal/external application | Internal | |
| Hole ⌀ | 4.7 mm | |
| Thread depth | 12.7 mm | |
| Type of product | thread milling cutter |
Identification numbers & Classifications
| Article number | 139725 1/4-20 | |
| Manufacturer number | 139725 1/4-20 |
Application Table
N
220
N
220
N
170
P
170
P
150
P
120
P
80
P
60
H
35
M
90
M
70
S
60
K
120
N
180
Description
Version:
Corrected thread profile for milling exact internal threads (ensure stable clamping conditions).
Incorporating a countersink profile for a 90° countersink.
Incorporating a countersink profile for a 90° countersink.
Advantage:
Countersinking and thread milling in one operation!
Application:
For UNC unified coarse threads ASME-B1.1.
Note:
NEW GENERATION AVAILABLE!
Recommended successor product is No. 139723.
Recommended successor product is No. 139723.