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Description
Material HSSE
Thread size M3.5
ChamferC (2–3) threads
Standard DIN 371
Technical data for the M3.5 HSSE INOX general-purpose machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M3.5 |
| Thread Pitch P | 0.6 mm |
| Overall Length l1 | 56 mm |
| Flute Length l2 | 12 mm |
| Length l3 | 20 mm |
| Shank Diameter d2 | 4 mm |
| Square Drive Size a | 3 mm |
| Tap Drill Diameter | 2.9 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 M3.5 x0.6 tap has a reinforced shank according to DIN 371: diameter 4 mm, square drive 3 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 0.6 mm/rev, equal to the pitch of the M3.5 x0.6 thread.
M3.5 INOX machine tap – versatile HSSE tool
The M3.5 INOX machine tap is designed for precision tapping of holes with a diameter of 3.5 mm in stainless and structural steels. HSSE high-speed steel construction with 5% cobalt ensures a hardness of 66 HRC and long cutting edge life even when machining difficult-to-machine materials. Form C with straight flutes provides versatile use in through and blind holes. The 6H tolerance according to DIN 371 confirms high manufacturing quality. The M3.5 general-purpose machine tap is intended for departments engaged in series production of precision components.
Key features of the M3.5 tap for through and blind holes
- Manufacturing precision to 6H tolerance ensures dimensional repeatability and full thread interchangeability in series production of mechanical and electronic components
- Compliance with DIN 371 confirms quality and ensures standardized short shank dimensions compatible with European tool holders
- Durability increased by the addition of 5% cobalt allows operation at temperatures up to 650°C without loss of cutting edge performance
- Material versatility covering 304 and 316 austenitic stainless steels, structural steels up to 800 MPa, and nonferrous metals
- Compatibility with ER11 holders and tapping heads for CNC machining centers with synchronous tapping and automatic tool changing
- M3.5 HSSE machine tap with form C allows through and blind holes to be tapped with a single tool without the risk of jamming
The M3.5 machine tap for through and blind holes is used in electronics and precision engineering applications requiring small threads. It is suitable for the production of automation components. The tap drill diameter for the M3.5 thread is 2.9 mm for a coarse thread with a pitch of 0.6 mm.
Cutting data for the universal M3.5 HSSE INOX machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 455-1819 | 273-1091 |
| MStainless steel / INOX | 5-10 | 455-909 | 273-545 |
| KCast iron | 5-15 | 455-1364 | 273-818 |
| NAluminum | 10-25 | 909-2274 | 545-1364 |
Thread preparation M3.5
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 2.9 mm
3 Tapping
M3.5
✓ 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 M3.5 HSSE tap is suitable for austenitic stainless steels 304 and 316, structural steels up to 800 MPa, ductile cast iron, and aluminum and brass alloys. It is not recommended for hardened steels above 45 HRC.
The nominal tap drill diameter for the M3.5 thread is 2.9 mm. The hole tolerance zone should be within the range of 2.8–3.0 mm. A hole at the lower tolerance limit produces a fuller thread profile, while a hole at the upper limit reduces tapping torque.
The M3.5 tap works with ER11 holders and tapping chucks with axial compensation. Synchronized heads with automatic tool change capability are recommended for CNC machines.
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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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