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Machine Threader M8X0.75 - for stainless steel
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  • Machine Threader M8X0.75 - for stainless steel
  • Machine Threader M8X0.75 - for stainless steel - nr. 1
  • Machine Threader M8X0.75 - for stainless steel - nr. 2
Narex Zdanice spol. s r.o.

Machine tap M8X0.75 DIN 374 C HSSE

Narex Zdanice spol. s r.o. Narex Zdanice spol. s r.o.
0000007134
€14.57 tax inc.

Net price: €11.84

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W magazynie: 9 pcs.
W magazynie: 9 pcs.

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Call and order: (44) 755-04-05

Description

Material HSSE
Thread size M8x0.75
ChamferC (2–3) threads
Standard DIN 374

Technical data for the M8x0.75 HSSE INOX general-purpose machine tap

Technical Data
Nominal Diameter d1 M8x0.75
Thread Pitch P 0.75 mm
Overall Length l1 90 mm
Flute Length l2 20 mm
Shank Diameter d2 6 mm
Square Drive Size a 4.9 mm
Tap Drill Diameter 7.25 mm
Chamfer C (2÷3) P
Thread tolerance 6H
M8x0.75 DIN 374 tap – dimensional drawing with lengths and shank dimensions

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 M8x0.75 tap has a reduced shank to DIN 374: diameter 6 mm, square size 4.9 mm.

M8x0.75 DIN 374 tap – diagram of chip movement and rotation direction during tapping
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 0.75 mm/rev, equal to the pitch of the M8x0.75 thread.

M8x0.75 INOX machine tap – HSSE tool for stainless steel

The M8x0.75 INOX machine tap is designed for precision tapping of holes with a diameter of 8 mm and a fine pitch of 0.75 mm in stainless and structural steels. HSSE high-speed steel construction with 5% added cobalt ensures a hardness of 66 HRC and long cutting edge life even when machining difficult-to-machine materials. Form C with straight flutes provides versatile use in through and blind holes. The 6H tolerance in accordance with DIN 374 confirms high manufacturing quality. The M8x0.75 HSSE machine tap is intended for departments engaged in series production of precision components.

Key features of the M8x0.75 tap for through and blind holes

  • Fine pitch of 0.75 mm provides the maximum number of threads per unit length, increasing sealing performance and connection load capacity in precision components
  • Compliance with DIN 374 for fine threads confirms quality and ensures standardized shank dimensions compatible with European holders
  • Durability increased by the addition of 5% cobalt allows operation at temperatures up to 650°C without loss of cutting edge performance
  • Material versatility covering 304 and 316 austenitic stainless steels, structural steels up to 800 MPa, and nonferrous metals
  • Compatibility with ER16 holders and tapping heads for CNC machining centers with synchronous tapping and automatic tool changing
  • M8x0.75 general-purpose machine tap with form C allows through and blind holes to be tapped with a single tool without the risk of jamming

The M8x0.75 HSSE machine tap is used in electronics and precision engineering requiring metric fine threads. It performs well in optical component manufacturing. The tap drill diameter for the M8x0.75 thread is 7.25 mm.

Cutting data for the M8x0.75 HSSE INOX general-purpose machine tap

MaterialCutting speed Vc [m/min]Spindle speed n [rpm]Feed f [mm/min]
PSteel 5-20 199-796 149-597
MStainless steel / INOX 5-10 199-398 149-298
KCast iron 5-15 199-597 149-448
NAluminum 10-25 398-995 298-746

Thread preparation M8x0.75

1 Spot drilling

NC spotting drill 90°

2 Drilling

Ø 7.25 mm

3 Tapping

M8x0.75

✓ Done!

Tolerance 6H

Standard: DIN 374 | Chamfer: C (straight) | Application: general-purpose (through and blind holes)

Tolerance 6H — metric thread tolerance classes

ClassAccuracyApplicationStatus
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 M8x0.75 HSSE tap is suitable for austenitic stainless steels 304 and 316, structural steels up to 800 MPa, ductile cast iron, and aluminum and brass alloys. It is not recommended for hardened steels above 45 HRC.

The nominal tap drill diameter for the M8x0.75 thread is 7.25 mm. The hole tolerance range should be 7.15–7.35 mm. A hole at the lower tolerance limit produces a fuller thread profile, while one at the upper limit reduces tapping torque.

The M8x0.75 tap works with ER16 holders and tapping chucks with axial compensation. Synchronized heads with automatic tool change capability are recommended for CNC machines.

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Machine tap M8X0.75 DIN 374 C HSSE

Machine tap M8X0.75 DIN 374 C HSSE

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