BAER HSSE Machine Tap - Form B - UNJF 7/16 x 20 - DIN 376
BAER HSSE Machine Tap - Form B - UNJF 7/16 x 20 - DIN 376
Our machine taps are powerful and reliable taps for efficient machining in one step with the machine. Machine taps are used especially in industrial manufacturing. They can be used in CNC machines, thread cutting machines, cordless drills and pneumatic tapping arms, among others. As they are characterised by high efficiency and low production costs, they are often used in series production. The thread is cut by machine in one operation. Thus, although the BAER machine tap can basically be compared to short machine tap, it is designed for use with the machine.
The screw tap has an overflow shank according to DIN 376. This means that the shank has a smaller diameter than the thread. This means that the screw tap can also be used in deeper holes and longer thread lengths. This means that the chip can also be used in deeper holes and longer thread lengths, as the long chamfer, the straight flutes and the spiral point ensure that the is transported forwards out of the hole.
Every material has its own individual chip behaviour. Therefore, screw taps must have the correct rake angle and - for even better results - a specially treated surface. This is the only way to achieve a good chip transport and to produce a thread that is true to gauge.
The high quality of the cobalt-alloyed HSSE steel that we use ensures that our tools are extremely durable and robust. Due to special hardening processes and repeated tempering the hardness structure is very homogeneous, which forms the ideal basis for a genuine BAER screw taps. This increases the toughness and stability of the screw taps, allowing them to remain in use for longer.
Dimensions
| Diameter |
7/16 |
|---|---|
| Nominal diameter in inches |
0,438 |
| Nominal diameter in mm |
11,113 |
| Pitch |
20 |
| Pitch in mm |
1,27 |
| Dimension |
UNJF 7/16 x 20 |
Characteristics
| Product group |
Screw taps |
|---|---|
| Product type |
Machine taps |
| Thread standard |
UNJF: American Unified aerospace fine thread according to ISO 3161-1977, BS 4084-1987, MiL-S |
| Tolerance |
3BX |
| Direction |
Right |
| Standard |
DIN 376 |
| Tensile strength at room temperature |
up to 900 N/mm² | 27.1 HRC |
| Material |
HSSE bright |
10 mm
Through hole up to 2 x D
Form B with spiral point
4-5 threads
Chips are removed downwards in the direction of cutting
External cooling and lubrication
HSSE bright
up to 900 N/mm² | 27.1 HRC
3BX
Applications
- Good machinable materials up to a maximum of 900 N/mm²
- Alloyed and unalloyed heat-treatable steels
Technical drawing
| D1 |
UNJF No. 7/16 x 20 |
|---|---|
| D2 |
8 mm |
| L1 |
100 mm |
| L2 |
22 mm |
| Diameter |
7/16 |
| Square |
6,2 mm |
Application – Sample materials for taps
| Unalloyed construction steels | Cutting speed vc in m/min | |
|---|---|---|
| 1.0037 | St 37-2 | 5 - 12 |
| 1.0044 | St 44-2 | 5 - 12 |
| 1.0039 | S 235JRG1+CR | 5 - 12 |
| 1.0060 | St 60-2 | 5 - 10 |
| Free-cutting steels | Cutting speed vc in m/min | |
|---|---|---|
| 1.0718 | 9 SMnPb 28 | 5 - 12 |
| 1.0721 | 10 S 20 | 5 - 12 |
| 1.0736 | 9 SMn 36 | 5 - 12 |
| 1.0726 | 35 S 20 | 5 - 10 |
| Cast steel | Cutting speed vc in m/min | |
|---|---|---|
| 1.0420 | GS-38 | 8 - 15 |
| 1.1120 | GS-20 Mn 5 | 5 - 15 |
| 1.5633 | GS-24 Ni 8 | 5 - 12 |
| 1.7379 | GS-18 CrMo 9 10 | 5 - 12 |
| Alloyed construction steels | Cutting speed vc in m/min | |
|---|---|---|
| 1.5415 | 15 Mo 3 | 5 - 12 |
| 1.5622 | 14 Ni 6 | 5 - 10 |
| 1.7335 | 13 CrMo 4 4 | 5 - 10 |
| 1.7715 | 14 MoV 6 3 | 5 - 10 |
Cutting speed vc [m/min] = (Outer diameter * π * speed) / 1000
Rotation speed n [1/min] = (Cutting speed in m/min * 1000) / (Outer diameter * π)
Feedrate programming [mm/min] = speed * pitch
Please note that the above cutting speeds are indicative and must be adjusted depending on lubrication and actuation.
Further information
- UNJF - American Unified Aerospace Fine Thread ISO 3161-1977, BS 4084-1987, MiL-S-8879
- Designations, geometries and definitions on taps
- Thread tolerances of the internal thread
- Internal thread and core hole dimensions
- Tap Chamfer forms
- Comparison inch-mm
- Surface treatments on tapping tools
- Cutting speeds and lubrication/cooling
- Information about tapping
- Material table
