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Description
Material HSSE
Thread size M4
ChamferC (2–3) threads
Standard DIN 371
Technical data for the M4 HSSE INOX general-purpose machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M4 |
| Thread Pitch P | 0.7 mm |
| Overall Length l1 | 63 mm |
| Flute Length l2 | 12 mm |
| Length l3 | 21 mm |
| Shank Diameter d2 | 4.5 mm |
| Square Drive Size a | 3.4 mm |
| Tap Drill Diameter | 3.3 mm |
| Chamfer | C (2÷3) P |
| Thread tolerance | 6H |
Where chips remain in a straight-flute tap
The flute holds the chips until the tap is reversed out
The straight flute runs parallel to the tap axis. It has no helix to carry chips upward. The chamfer cutting edges are not ground at an angle, so they do not push chips downward. Short chips break into fragments and remain in the flute, beside the cutting edges that produced them. They leave the hole only when the tap is backed out. The M4 x0.7 tap has a reinforced shank according to DIN 371: diameter 4.5 mm, square drive 3.4 mm.
1
Straight flute – chips remain in the flute, next to the cutting edges that produced them.
2
Chamfer C: 2–3 incomplete threads on the tapered lead.
3
The tap rotates clockwise to cut a right-hand thread.
4
Individual fragments exit at the top, onto the workpiece surface.
5
A few fragments fall below the tip and exit through the bottom of the hole.
6
Feed 0.7 mm/rev, equal to the pitch of the M4 x0.7 thread.
M4 INOX machine tap – for through and blind holes
This model from the HSSE series with a short shank according to DIN 371, designed for cutting M4 metric threads in stainless and structural steels, features compact dimensions. The M4 INOX machine tap features optimum geometry for standard diameters, ensuring stable operation at high spindle speeds. Thanks to its 5% cobalt content, the tool maintains a hardness of 66 HRC even at temperatures up to 650°C in the cutting zone. Form C with straight flutes provides general-purpose capability. The M4 machine tap for through and blind holes is intended for manufacturers of mechanical and electronic components.
Main advantages of the M4 general-purpose HSSE tap
- Short shank in accordance with DIN 371 provides compact dimensions ideal for working in confined spaces and at shallow tapping depths
- Material versatility covering 304 and 316 austenitic stainless steels, structural steels up to 800 MPa, GGG40 ductile cast iron, and aluminum alloys
- Compatibility with ER11 holders and collets for precise clamping on machining centers with axial compensation and automatic tool changing
- Precision to tolerance class 6H for demanding fit tolerances in series production of high-precision mechanical and electronic components
- Compliance with DIN 371 ensures standardized short-shank dimensions and interchangeability with tools from European manufacturers
- M4 HSSE machine tap with form C allows tapping of through holes and blind holes without changing the tool or parameters
The M4 general-purpose machine tap is used in electronics, precision engineering, and industrial automation component production. Cooling with an EP emulsion at a minimum concentration of 8% extends tool life. The tap drill diameter for the M4 thread is 3.3 mm for a coarse thread with a pitch of 0.7 mm.
Cutting data for the universal M4 HSSE INOX machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 398-1592 | 279-1114 |
| MStainless steel / INOX | 5-10 | 398-796 | 279-557 |
| KCast iron | 5-15 | 398-1194 | 279-836 |
| NAluminum | 10-25 | 796-1989 | 557-1392 |
Thread preparation M4
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 3.3 mm
3 Tapping
M4
✓ Done!
Tolerance 6H
Standard: DIN 371 | Chamfer: C (straight) | Application: general-purpose (through and 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
With proper cooling and lubrication, the M4 HSSE tap produces 400-600 threads in structural steel or 250-350 threads in stainless steel. Dry machining reduces tool life by 40-50%.
Yes, the M4 HSSE tap with 5% cobalt is designed for austenitic stainless steels 304 and 316. The cobalt addition increases heat resistance up to 650°C in the cutting zone.
An HSSE tap contains 5% cobalt, which increases hardness from 64 to 66 HRC and heat resistance to 650°C. HSSE is suitable for stainless steels, while HSS is suitable only for structural steels up to 800 MPa.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| 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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