Polski 
- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
Description
Material HSSE
Thread size M3.5
ChamferC (2–3) threads
Standard DIN 371
Technical data for the M3.5 blind-hole tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M3.5 |
| Thread Pitch P | 0.6 mm |
| Helix Angle | 40° |
| 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 |
How a spiral flute tap evacuates chips from a blind hole
The 40° flute works like a screw conveyor
The flutes of this tap spiral to the right at an angle of 40° 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 clean, and the cutting edges do not encounter packed chips. The M3.5 x0.6 tap has a reinforced shank to DIN 371: diameter 4 mm, square 3 mm.
1
The 40° 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 0.6 mm/rev, equal to the pitch of the M3.5 x0.6 thread.
M3.5 spiral-flute machine tap – for blind holes
The M3.5 spiral flute machine tap from the miniature series is designed to produce special threads in precision engineering and electronics. HSSE steel construction with 5% cobalt provides a hardness of 65-67 HRC and high cutting edge heat resistance up to 650°C. The 40° spiral flute ensures aggressive chip evacuation when tapping deep blind holes. Its form C chamfer makes the tool particularly suitable for tapping close to the bottom of blind holes. The 6H tolerance conforming to DIN 371 meets precision manufacturing requirements.
Key features of the M3.5 spiral flute machine tap
- Manufacturing precision to 6H tolerance guarantees dimensional repeatability and full thread interchangeability in series production of mechanical components
- Compliance with DIN 371 confirms quality and ensures standardized short shank dimensions compatible with European machine tool holders
- Durability of HSSE steel with 5% cobalt allows operation at temperatures up to 650°C without loss of the cutting edge's mechanical properties
- Compatibility with ER11 and ER16 tool holders and tapping heads for CNC machining centers with synchronous tapping capability
- Designed for precision engineering includes electronic housings, optical components, and measuring equipment requiring special threads
- 40° spiral flutes ensure aggressive chip evacuation when tapping blind holes up to 2.5D deep without the risk of breakage
The M3.5 spiral flute tap is suitable for manufacturing electronic components and measuring equipment requiring threads with a nonstandard diameter. The standard pitch of the M3.5 thread is 0.6 mm, with a tap drill diameter of 2.9 mm. The tool works with standard coolant emulsions and tapping oils.
Cutting data for the M3.5 blind-hole 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 | 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 in a blind hole
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 (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 M3.5 HSSE spiral flute machine tap is suitable for structural steels up to 900 MPa, stainless steels, aluminum, and brass. Size M3.5 is used in electronics and precision engineering requiring special threads.
For an M3.5x0.6 thread in tolerance class 6H, the tap drill diameter should be 2.9 mm. The permissible hole diameter range is 2.9-3.0 mm. A smaller hole increases cutting torque and the risk of tool breakage.
Yes, cooling with tapping oil or minimum quantity lubrication (MQL) is recommended due to the small diameter. The tool requires careful handling and low cutting speeds, similar to M3.
Product accessories
Reviews
No customer reviews for the moment.
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 |
Recommended for you
Viewed products
This website uses its own and third-party cookies to improve our services and show you advertising related to your preferences by analyzing your browsing habits. To give your consent to its use, press the Accept button.
Cookie preferences
Functional cookiesTechnical
Functional cookies are strictly necessary to provide the services of the shop, as well as for its proper functioning, so it is not possible to refuse their use. They allow the user to browse through our website and use the different options or services that exist on it.
Advertising Cookies
These are cookies that collect information about the advertisements shown to users of the website. They can be anonymous, if they only collect information about the advertising spaces shown without identifying the user, or personalised, if they collect personal information about the user of the shop by a third party, for the personalisation of these advertising spaces.
Analytics cookies
Collect information about the user's browsing experience in the shop, usually anonymously, although sometimes they also allow the user to be uniquely and unequivocally identified in order to obtain reports on the user's interests in the products or services offered by the shop.