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Description
Material HSSE-PM
Thread size M3
ChamferC (2–3) threads
Standard DIN 371
Technical data for the M3 blind-hole tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M3 |
| Thread Pitch P | 0.5 mm |
| Helix Angle | 40° |
| Overall Length l1 | 56 mm |
| Flute Length l2 | 18 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 |
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 x0.5 tap has a reinforced shank to DIN 371: diameter 3.5 mm, square 2.7 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 0.5 mm/rev, equal to the pitch of the M3 x0.5 thread.
M3 spiral flute machine tap – premium powder metallurgy steel
The FAN premium tap series for precision engineering includes the M3 spiral flute machine tap made from HSSE-PM powder metallurgy steel for extended tool life. The 6H tolerance in accordance with DIN 371 guarantees the dimensional repeatability required in series production of electronic components. Powder metallurgy manufacturing provides a uniform microstructure and a hardness of 66-68 HRC while maintaining high toughness. The 40° spiral flute directs chips backward when tapping blind holes in miniature bodies and housings.
Why choose the M3 spiral flute machine tap
- Compliance with DIN 371 confirms manufacturing quality and ensures standardized short shank dimensions compatible with European miniature tool holders
- Designed for precision engineering includes electronic enclosures, optical components, industrial watches and measuring equipment
- Tolerance class 6H precision ensures full thread interchangeability and dimensional repeatability in high-volume production of miniature components
- Durability of HSSE-PM powder metallurgy steel enhanced by the uniform microstructure, allows 800-1000 threads to be cut in structural steel
- Form C chamfer for blind holes allows tapping close to the bottom of the hole with a minimal incomplete thread length of 2-3 pitches
- 40° spiral flutes provide aggressive chip evacuation when tapping deep blind holes in miniature components
The M3 spiral flute tap is used in the production of electronic components and measuring instruments requiring miniature threads. The standard pitch of the M3 thread is 0.5 mm, with a tap drill diameter of 2.5 mm. This premium tool is recommended for difficult-to-machine materials and steels with inclusions.
Cutting data for the M3 blind-hole 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 | 5-10 | 531-1061 | 266-530 |
| KCast iron | 5-15 | 531-1592 | 266-796 |
| NAluminum | 10-25 | 1061-2653 | 530-1326 |
Thread preparation M3 in a blind hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 2.5 mm
3 Tapping
M3
✓ 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 Fana M3 HSSE-PM tap is designed for austenitic and ferritic stainless steels, alloy steels, titanium, and difficult-to-machine nickel alloys. The uniform microstructure of powder metallurgy steel ensures stable operation in materials with inclusions.
For an M3x0.5 thread of tolerance class 6H, the recommended tap drill diameter is 2.5 mm. The hole tolerance range should be 2.5 to 2.6 mm. Exceeding the upper limit results in an incomplete thread profile.
Fana HSSE-PM taps are manufactured using powder metallurgy, providing a uniform microstructure and a hardness of 66-68 HRC compared with 65-67 HRC for standard HSSE. This translates into 30-50% longer tool life when machining stainless steels and improved resistance to chipping.
Product accessories
Hand tap M3 DIN 352/3 6H HSS Bucovice
Reference: 0000004910 In stock > 10 items
€5.53
€6.80 brutto
Die M3 HSSE INOX 6g DIN 22 568 Fanar
Reference: 0000007075 In stock > 10 items
€13.42
€16.51 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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