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Machine Tap M14x1.25 DIN 374/35 C HSSE
€27.51 tax inc.
Net price: €22.37
Description
Material HSSE
Thread size M14x1.25
ChamferC (2–3) threads
Standard DIN 374
Technical data for the M14x1.25 blind hole tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M14x1.25 |
| Thread Pitch P | 1.25 mm |
| Helix Angle | 35° |
| Overall Length l1 | 100 mm |
| Flute Length l2 | 15 mm |
| Length l3 | 42 mm |
| Shank Diameter d2 | 11 mm |
| Square Drive Size a | 9 mm |
| Tap Drill Diameter | 12.8 mm |
| Chamfer | C (2÷3) P |
| Thread tolerance | 6H |
How a spiral flute tap evacuates chips from a blind hole
The 35° flute works like a screw conveyor
The flutes of this tap follow a right-hand helix at an angle of 35° to the axis. The tap rotates clockwise and advances into the hole. Chips cut by the chamfer enter the flute, and the helix carries them upward like the auger in a meat grinder. The bottom of the hole stays clear, and the cutting edges do not encounter packed chips. The M14x1.25 tap has a reduced shank to DIN 374: diameter 11 mm, square drive 9 mm.
1
The 35° spiral flute carries chips upward from the chamfer.
2
The stepped chip exits the hole and breaks into short pieces.
3
The tap rotates clockwise to cut a right-hand thread.
4
Chamfer C: 2–3 incomplete threads on the tapered lead.
5
Clearance below the tap tip – min. 2 thread pitches above the bottom.
6
Feed 1.25 mm/rev, equal to the pitch of the M14x1.25 thread.
M14x1.25 spiral flute machine tap – for blind holes
The M14x1.25 spiral flute machine tap is a professional tool for producing precise fine threads in blind holes up to 2.5D deep. Its spiral flute design with a 35° helix angle ensures efficient rearward chip evacuation, reducing the risk of chip jamming when tapping blind holes. Made of cobalt-alloyed HSSE high-speed steel, it offers high resistance to wear, elevated temperatures, and the loads encountered in production machining. The 6H tolerance to DIN 374 ensures high dimensional repeatability of the threads produced. The tool is intended for CNC machine tools, automatic lathes, drilling machines, and machines equipped with suitable tapping chucks.
Key benefits of the M14x1.25 spiral flute machine tap
- The 35° spiral flute geometry directs chips toward the tool shank, allowing safe and efficient tapping of blind holes
- High-quality HSSE high-speed steel provides increased resistance to abrasion, high temperatures, and the loads generated during machine tapping
- Tolerance class 6H precision in accordance with DIN 374 ensures dimensional repeatability and full interchangeability of the threaded connections produced
- The fine pitch of 1.25 mm produces a precise connection with high resistance to self-loosening and a large contact area between mating threads
- Chamfer form C with a length of 2–3 threads allows tapping close to the bottom of a blind hole, minimizing the length of the incompletely threaded section
- A wide range of applications covers structural steels, stainless steels, aluminum, brass, bronze, and other materials appropriately matched to the machining parameters and conditions
- Suitability for machine operation allows the tap to be used in chucks with axial compensation and in holders designed for CNC machining centers and automatic lathes
The M14x1.25 spiral flute tap is suitable for production runs, toolrooms, machine shops, and maintenance departments. The fine pitch of 1.25 mm allows precise connections used in hydraulics, pneumatics, automotive applications, machine building, and components requiring fine adjustment, among others. The recommended tap drill diameter for the M14x1.25 thread is 12.8 mm.
Cutting data for the M14x1.25 blind hole machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 114-455 | 142-568 |
| MStainless steel | 5-10 | 114-227 | 142-284 |
| KCast iron | 5-15 | 114-341 | 142-426 |
| NAluminum | 10-25 | 227-568 | 284-710 |
Thread preparation M14x1.25 in a blind hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 12.8 mm
3 Tapping
M14x1.25
✓ Done!
Tolerance 6H
Standard: DIN 374 | Helix angle: 35° | Chamfer: C (spiral flute) | Application: blind holes
Tolerance 6H — metric thread tolerance classes
| Class | Accuracy | Application | Status |
|---|---|---|---|
| 4H / 4g | High | Precision connections, hydraulics | — |
| 6H / 6g | Standard | Machine building, general-purpose applications | SELECTED |
| 7H / 8g | Low | Large clearance, easy assembly | — |
6H = internal thread (nut, hole) | 6g = external thread (screw)
Frequently asked questions
The M14x1.25 HSSE metric fine thread machine tap is primarily intended for machining structural steels, alloy steels, stainless steels, aluminum, brass, and bronze. The exact range of materials and recommended cutting data must always be matched to the material hardness, machine type, coolant used, and clamping stability.
For the M14x1.25 metric fine thread, the recommended tap drill diameter is 12.8 mm. The hole should be machined accurately, without excessive runout and with a suitable entry chamfer. A hole diameter that is too small increases tapping torque and the risk of tool damage, while one that is too large can result in an incomplete thread profile.
Yes, a suitably selected coolant or tapping oil is recommended during tapping. Proper lubrication reduces friction and temperature in the cutting zone, facilitates chip evacuation, and extends tap life. Ample cooling is particularly important when machining stainless steels, while aluminum tapping requires a fluid that prevents material from adhering to the cutting edges.
The M14x1.25 tap with spiral flutes at a 35° helix angle is primarily intended for blind holes. The spiral flute geometry carries chips toward the tool shank, preventing them from accumulating at the bottom of the hole being machined.
The standard M14 metric thread has a pitch of 2.0 mm, while the M14x1.25 thread is a metric fine thread with a pitch of 1.25 mm. The smaller pitch provides more threads over the same length, allows finer adjustment of the connection, and increases its resistance to self-loosening. M14x1.25 and M14x2 threads are not interchangeable.
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| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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