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Description
Material HSSE
Thread size M6
ChamferC (2–3) threads
Standard DIN 371
Technical data for the universal M6 left-hand HSSE INOX machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M6 |
| Thread Pitch P | 1 mm |
| Overall Length l1 | 80 mm |
| Flute Length l2 | 18 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 |
| Cutting edge helix angle | 40° |
How a spiral flute tap evacuates chips from a blind hole
The 40° flute works like a screw conveyor
The flutes of this tap follow a left-hand helix at an angle of 40° to the axis. The tap rotates counterclockwise and advances into the hole. The chip cut by the chamfer enters the flute, and the helix feeds it 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 according to DIN 371: diameter 6 mm, square size 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 counterclockwise – this is how it cuts a left-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 INOX left-hand machine tap – HSSE with a 40° helical cutting edge
In this line, the manufacturer offers an M6 INOX left-hand R40 machine tap with a special 40° helical cutting edge geometry and a left-hand cutting direction. The tool meets the requirements of DIN 371 and provides thread tolerance class 6H required in series production of special components. Its HSSE steel construction with 5% cobalt guarantees a hardness of 66 HRC and resistance to temperatures up to 650°C in the cutting zone. The 40° flute helix angle directs chips forward when tapping through holes. The left-hand cutting direction produces a left-hand thread.
Advantages of the universal M6 left-hand R40 tap
- Left-hand thread used in components protected against self-loosening, drive shafts and screws securing grinding wheels that rotate clockwise
- 40° helical cutting edge directs chips forward and out of the hole, making it ideal for tapping through holes and ensuring a clean thread
- Material versatility covering austenitic stainless steels 304 and 316, structural steels up to 800 MPa and nonferrous metals such as aluminum and brass
- Precision to tolerance class 6H meeting the requirements for series production of special components with demanding fit tolerances
- Conforms to DIN 371 ensures standardized short shank dimensions and interchangeability with tools from European cutting tool manufacturers
- M6 left-hand HSSE machine tap with R40 geometry ensures efficient chip evacuation at high cutting speeds on CNC machining centers
The universal M6 left-hand R40 machine tap is used to manufacture special components requiring left-hand threads. The M6 left-hand machine tap for through holes and blind holes is compatible with ER16 holders with reversing capability. The tap drill diameter for the M6 left-hand thread is 5 mm.
Cutting data for the universal M6 left-hand HSSE INOX 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 / INOX | 5-10 | 265-531 | 265-531 |
| KCast iron | 5-15 | 265-796 | 265-796 |
| NAluminum | 10-25 | 531-1326 | 531-1326 |
Thread preparation M6
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: 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 M6 left-hand R40 HSSE tap with a 40° helical cutting edge is suitable for austenitic stainless steels 304 and 316, structural steels up to 800 MPa and ductile cast iron. The R40 geometry ensures efficient forward chip evacuation.
The M6 left-hand R40 tap has a right-hand helical cutting edge at an angle of 40°, which directs chips forward – toward the through hole. This design is optimal for blind holes, preventing chip accumulation.
M6 left-hand threads are used in components protected against self-loosening, clockwise-rotating drive shafts and screws securing grinding wheels. They prevent the joint from loosening under vibration.
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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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