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Description
Material HSSE-PM
Thread size M6
ChamferC (2–3) threads
Standard DIN 371
Technical data for the M6 blind-hole tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M6 |
| Thread Pitch P | 1 mm |
| Helix Angle | 40° |
| Overall Length l1 | 80 mm |
| Flute Length l2 | 10 mm |
| Length l3 | 30 mm |
| Shank Diameter d2 | 6 mm |
| Square Drive Size a | 4.9 mm |
| Tap Drill Diameter | 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 M6 x1 tap has a reinforced shank to DIN 371: diameter 6 mm, square 4.9 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 1 mm/rev, equal to the pitch of the M6 x1 thread.
M6 spiral flute machine tap – premium powder metallurgy steel
The M6 spiral flute machine tap made from HSSE-PM powder metallurgy steel is designed for precision tapping of blind holes in difficult-to-machine materials. Powder metallurgy manufacturing ensures a uniform microstructure and a hardness of 66-68 HRC while maintaining high cutting edge toughness. Its 40° spiral flute design aggressively directs chips backward, which is essential for blind tapping. The 6H tolerance according to DIN 371 ensures the dimensional repeatability required in precision manufacturing.
Technical data for the M6 spiral flute machine tap
- Material versatility covering austenitic and ferritic stainless steels, alloy steels, titanium, and difficult-to-machine nickel and cobalt alloys
- Durability of HSSE-PM powder metallurgy steel enhanced by the uniform microstructure, allows 800-1000 threads to be cut in structural steel
- Compatibility with ER16 and ER20 tool holders and collets for precise clamping on machining centers with axial compensation
- Precision to tolerance class 6H for demanding fit tolerances in series production of automotive and hydraulic components
- Conforms to DIN 371 ensures standardized short shank dimensions and full interchangeability with tools from European manufacturers
- 40° flute geometry with form C chamfer allows tapping close to the bottom of a blind hole with a minimal incomplete thread length of 2-3 pitches
The M6 spiral flute tap is used in series production of components made from stainless steels and difficult-to-machine materials. The standard pitch of the M6 thread is 1 mm, with a tap drill diameter of 5 mm. This premium tool is recommended for applications requiring maximum tool life and thread surface quality.
Cutting data for the M6 blind-hole machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 265-1061 | 265-1061 |
| MStainless steel | 5-10 | 265-531 | 265-531 |
| KCast iron | 5-15 | 265-796 | 265-796 |
| NAluminum | 10-25 | 531-1326 | 531-1326 |
Thread preparation M6 in a blind hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 5 mm
3 Tapping
M6
✓ 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 M6 HSSE-PM tap is designed for austenitic and ferritic stainless steels, alloy steels, titanium and difficult-to-machine nickel alloys. The uniform microstructure of the powder metallurgy steel ensures stable operation even in materials containing inclusions.
For the M6x1 thread in tolerance class 6H, the tap drill diameter should be 5 mm. The permissible hole tolerance range is 5.0-5.15 mm. A smaller hole increases cutting torque, while a larger hole reduces the thread class.
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
Fanar's M6 HSSE INOX 6g DIN 22 568 tooling
Reference: 0000007078 In stock < 10 items
€11.84
€14.57 brutto
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| 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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