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Description
Material HSSE-PM
Thread size M8
ChamferC (2–3) threads
Standard DIN 371
Technical data for the universal M8 HSSE-PM INOX machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M8 |
| Thread Pitch P | 1.25 mm |
| Overall Length l1 | 90 mm |
| Flute Length l2 | 20 mm |
| Length l3 | 35 mm |
| Shank Diameter d2 | 8 mm |
| Square Drive Size a | 6.2 mm |
| Tap Drill Diameter | 6.8 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 M8 x1.25 tap has a reinforced shank according to DIN 371: diameter 8 mm, square drive 6.2 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 1.25 mm/rev, equal to the pitch of the M8 x1.25 thread.
M8 INOX machine tap – HSSE-PM for difficult-to-machine materials
In this line, the manufacturer offers the M8 INOX HSSE-PM machine tap made of special steel produced by powder metallurgy for the most demanding requirements. The tool meets DIN 371 requirements and provides thread tolerance class 6H required in series production of components made of difficult-to-machine materials. HSSE-PM steel construction guarantees a uniform grain structure, a hardness of 67 HRC, and exceptional abrasion resistance. Form C with straight flutes provides universal use in through and blind holes in stainless steels and special alloys.
Advantages of the universal M8 HSSE-PM tap
- HSSE-PM powder metallurgy steel provides a uniform grain structure, a higher hardness of 67 HRC, and exceptional abrasion resistance when machining difficult-to-machine materials
- Tool life increased by 80-120% compared with standard HSSE taps thanks to advanced PM steel manufacturing technology
- Material versatility covering austenitic and duplex stainless steels, titanium alloys, Inconel, Hastelloy, and steels hardened to 50 HRC
- Precision to tolerance class 6H meeting the requirements for series production of aerospace and medical components with the most stringent tolerance requirements
- Conforms to DIN 371 ensures standardized short-shank dimensions and interchangeability with tools from European manufacturers
- M8 HSSE-PM machine tap with form C ensures proper chip evacuation in through holes and blind holes without the risk of jamming
The universal M8 HSSE-PM machine tap is used in the aerospace and medical industries and in the production of superalloy components. The M8 machine tap for through and blind holes is compatible with ER20 holders. The tap drill diameter for an M8 thread is 6.8 mm.
Cutting data for the universal M8 HSSE-PM INOX machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 199-796 | 249-995 |
| MStainless steel / INOX | 5-10 | 199-398 | 249-498 |
| KCast iron | 5-15 | 199-597 | 249-746 |
| NAluminum | 10-25 | 398-995 | 498-1244 |
Thread preparation M8
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 6.8 mm
3 Tapping
M8
✓ 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 M8 HSSE-PM powder metallurgy steel tap is suitable for difficult-to-machine materials: titanium, Inconel, Hastelloy, and high-hardness stainless steels. PM technology increases wear resistance by 80-120% compared with standard HSSE.
The HSSE-PM tap is manufactured using powder metallurgy, providing a hardness of 67 HRC instead of 66 HRC and a fine-grained structure that increases strength. Tool life increases by 80-120% when machining difficult-to-machine materials.
Yes, when machining titanium and superalloys, flood cooling with tapping oil or an EP emulsion at a minimum concentration of 12% is recommended. Cooling is essential to maintaining tool life and thread quality.
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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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