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Description
Material HSSE
Thread size M3
ChamferC (2–3) threads
Standard DIN 371
Technical data for the M3 HSSE INOX general-purpose machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M3 |
| Thread Pitch P | 0.5 mm |
| Overall Length l1 | 56 mm |
| Flute Length l2 | 10 mm |
| Length l3 | 18 mm |
| Shank Diameter d2 | 3.5 mm |
| Square Drive Size a | 2.7 mm |
| Tap Drill Diameter | 2.5 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 M3 x0.5 tap has a reinforced shank according to DIN 371: diameter 3.5 mm, square drive 2.7 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 0.5 mm/rev, equal to the pitch of the M3 x0.5 thread.
M3 INOX machine tap – versatile HSSE tool
In this range, the manufacturer offers an M3 INOX machine tap with cutting geometry optimized for the smallest metric thread diameter available. The tool meets DIN 371 requirements and provides the 6H thread tolerance class required in series production of mechanical and precision components. HSSE steel construction with 5% cobalt ensures a hardness of 66 HRC and resistance to temperatures up to 650°C in the cutting zone. Form C with straight flutes provides universal use in through and blind holes in stainless steels.
Advantages of the M3 tap for through and blind holes
- Compatibility with ER11 holders collets and synchronized tapping chucks for CNC machining centers with automatic tool change
- Durability increased by the addition of cobalt in HSSE steel extends cutting edge life by 40-60% compared with standard HSS taps
- Material versatility covering austenitic stainless steels 304 and 316, structural steels up to 800 MPa and nonferrous metals such as aluminum and brass
- Precision to tolerance class 6H meeting the requirements of series production of mechanical and pneumatic components with tight fit tolerances
- Conforms to DIN 371 ensures standardized short shank dimensions and interchangeability with tools from European cutting tool manufacturers
- Universal M3 machine tap with form C ensures proper chip evacuation in through holes and blind holes without the risk of jamming
The M3 HSSE machine tap is used in electronics, precision engineering, and manufacturing industrial automation components requiring small threads. The M3 machine tap for through and blind holes is compatible with automatic tool change systems. The tap drill diameter for the M3 thread is 2.5 mm for a coarse thread with a pitch of 0.5 mm.
Cutting data for the universal M3 HSSE INOX machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 531-2122 | 266-1061 |
| MStainless steel / INOX | 5-10 | 531-1061 | 266-530 |
| KCast iron | 5-15 | 531-1592 | 266-796 |
| NAluminum | 10-25 | 1061-2653 | 530-1326 |
Thread preparation M3
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 2.5 mm
3 Tapping
M3
✓ 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
The M3 HSSE tap with form C and straight flutes is universal – suitable for both through holes and blind holes. Its design ensures proper chip evacuation in both hole types.
The M3 HSSE tap produces an internal thread to tolerance class 6H. The designation 6H specifies the permissible deviations of the thread pitch and minor diameters – the digit 6 indicates the tolerance zone width (medium), and the letter H indicates the position of the zone at the zero line. Tolerance 6H ensures proper fit with screws to tolerance 6g.
When tapping stainless steels, an EP emulsion at a minimum concentration of 8% or tapping oil is recommended for cooling. Cooling extends tool life by a factor of 2-3 and improves the thread surface finish.
Product accessories
Hand tap M3 DIN 352/3 6H HSS Bucovice
Reference: 0000004910 In stock > 10 items
€5.53
€6.80 brutto
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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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