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Description
Material HSSE
Thread size M11
ChamferC (2–3) threads
Standard DIN 376
Technical data for the M11 HSSE INOX general-purpose machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M11 |
| Thread Pitch P | 1.5 mm |
| Overall Length l1 | 100 mm |
| Flute Length l2 | 22 mm |
| Shank Diameter d2 | 8 mm |
| Square Drive Size a | 6.2 mm |
| Tap Drill Diameter | 9.5 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. There is 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, next to the cutting edges that produced them. They leave the hole only when the tap is backed out. The M11 x1.5 tap has a reduced shank to DIN 376: diameter 8 mm, square size 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 1.5 mm/rev, equal to the pitch of the M11 x1.5 thread.
M11 INOX machine tap – compliant with DIN 376
This model from the Narex HSSE series, designed for CNC machining and precision tapping in industrial toolrooms, features a long shank to DIN 376. The M11 INOX machine tap has a reinforced straight shank that increases rigidity during operation at high spindle speeds. With the addition of 5% cobalt, the tool retains a hardness of 66 HRC even at temperatures up to 650°C in the cutting zone. Form C with straight flutes provides versatile use. The M11 HSSE machine tap is intended for manufacturing plants and industrial service facilities.
Key advantages of the M11 INOX Narex tap
- Long shank to DIN 376 provides increased clamping rigidity and eliminates vibration at high spindle speeds on CNC machines
- Durability increased by the addition of cobalt in HSSE steel allows 400-600 threads to be cut in structural steel with proper emulsion cooling
- Material versatility covering structural steels up to 800 MPa, austenitic stainless steels, GGG40 ductile cast iron and aluminum alloys
- Precision to tolerance class 6H for demanding fit tolerances in series production of mechanical, hydraulic and pneumatic components
- Compatibility with ER20 holders and collets for precise clamping on machining centers with axial compensation and automatic tool changing
- Universal M11 machine tap with form C allows tapping of through holes and blind holes without changing the tool or parameters
The M11 machine tap for through holes and blind holes is used in automotive series production and on assembly lines requiring high repeatability. The Narex brand guarantees European manufacturing quality. The tap drill diameter for the M11 thread is 9.5 mm for a coarse thread with a pitch of 1.5 mm.
Cutting data for the universal M11 HSSE INOX machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 145-579 | 218-868 |
| MStainless steel / INOX | 5-10 | 145-289 | 218-434 |
| KCast iron | 5-15 | 145-434 | 218-651 |
| NAluminum | 10-25 | 289-723 | 434-1084 |
Thread preparation M11
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 9.5 mm
3 Tapping
M11
✓ Done!
Tolerance 6H
Standard: DIN 376 | 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 M11 HSSE tap with form C and straight flutes is universal – suitable for both through holes and blind holes. Its design ensures proper chip evacuation in both hole types.
The M11 HSSE tap produces an internal thread to tolerance class 6H. The designation 6H specifies the permissible deviations of the thread pitch and minor diameters – the digit 6 indicates the tolerance zone width (medium), and the letter H indicates the position of the zone at the zero line. Tolerance 6H ensures proper fit with screws to tolerance 6g.
When tapping stainless steels, an EP emulsion at a minimum concentration of 8% or tapping oil is recommended for cooling. Cooling extends tool life by a factor of 2-3 and improves the thread surface finish.
Product accessories
Machine tap M11 DIN 376/35 C HSSE Narex
Reference: 0000007292 In stock < 10 items
€31.58
€38.84 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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