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Machine Tap M24x1 DIN 374/35 C HSSE
0000007281
€50.82 tax inc.
Net price: €41.32
Description
Material HSSE
Thread size M24x1
ChamferC (2–3) threads
Standard DIN 374
Technical data for the M24x1 blind hole tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M24x1 |
| Thread Pitch P | 1 mm |
| Helix Angle | 35° |
| Overall Length l1 | 140 mm |
| Flute Length l2 | 13 mm |
| Length l3 | 55 mm |
| Shank Diameter d2 | 18 mm |
| Square Drive Size a | 14.5 mm |
| Tap Drill Diameter | 23 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 M24x1 tap has a reduced shank to DIN 374: diameter 18 mm, square drive 14.5 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 mm/rev, equal to the pitch of the M24x1 thread.
M24x1 spiral flute machine tap – metric fine thread for blind holes
The M24x1 machine tap cuts a metric fine thread with a pitch of 1 mm in tolerance class 6H. A pitch one-third of the standard pitch produces a more closely spaced thread profile, a larger contact area, and better resistance to loosening under vibration. The tool complies with DIN 374 for metric fine threads – the Ø 18 mm shank is reduced relative to the thread diameter and passes freely through the tapped hole. The 35° helical flute directs chips upward, which is essential for operation in a blind hole. HSSE steel with 5% cobalt has a hardness of 63–65 HRC and retains its cutting properties up to approximately 600 °C.
Technical specifications of the M24x1 machine tap
- Metric fine thread used in hydraulics, pneumatics, and adjustment connections where positioning accuracy and sealing are essential
- Material range covers structural steels with a tensile strength up to 900 MPa, stainless steels, and aluminum and copper alloys
- Chamfer C (2–3 threads) allows the thread to extend close to the bottom of a blind hole
- Tolerance class 6H ensures interchangeability with bolts and screws with an M24x1 thread in tolerance class 6g
- Straight shank Ø 18 mm with a square drive works with tapping holders with axial compensation
- Short flute length of 13 mm designed for shallow threads in thin walls and flanges
The M24x1 tap is used for valve and fitting fasteners, adjusting nuts, and thin-walled housings. The tap hole is drilled with a Ø 23 mm drill bit. With such a fine pitch, a hole diameter undersized by even 0.2 mm significantly increases tapping torque.
Cutting data for the M24x1 blind hole machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 66-265 | 66-265 |
| MStainless steel | 5-10 | 66-133 | 66-133 |
| KCast iron | 5-15 | 66-199 | 66-199 |
| NAluminum | 10-25 | 133-332 | 133-332 |
Thread preparation M24x1 in a blind hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 23 mm
3 Tapping
M24x1
✓ Done!
Tolerance 6H
Standard: DIN 374 | 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 | SELECTED |
| 7H / 8g | Low | Large clearance, easy assembly | — |
6H = internal thread (nut, hole) | 6g = external thread (screw)
Frequently asked questions
The M24x1 HSSE machine tap for metric fine threads performs well in structural steels with a tensile strength up to 900 MPa, stainless steels, aluminum, and brass. The fine pitch of 1 mm ensures leak-tight connections in hydraulic applications up to 400 bar.
For the M24x1 metric fine thread in tolerance class 6H, the tap drill diameter should be 23 mm. The permissible hole tolerance range is 23.0-23.2 mm. A smaller hole increases cutting torque and the risk of tool breakage.
Yes, cooling with an oil emulsion at a minimum concentration of 8% or with tapping oil is recommended and extends tool life by a factor of 2-3. Intensive cooling is required when machining stainless steels, while aluminum can be tapped with minimal lubrication.
Product accessories
Machine Threader M24x1 DIN 374 B HSSE
Reference: 0000006440 In stock < 10 items
€34.21
€42.08 brutto
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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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