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Machine Tap M15X1.5 Inox through-hole - nr. 1
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  • Machine Tap M15X1.5 Inox through-hole - nr. 1
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Narex Zdanice spol. s r.o.

Machine Tap M15X1.5 DIN 374 B HSSE

Narex Zdanice spol. s r.o. Narex Zdanice spol. s r.o.
12944
€31.72 tax inc.

Net price: €25.79

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W magazynie: 10-100 szt.
W magazynie: 10-100 szt.

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

Description

Material HSSE
Thread size M15x1.5
ChamferB (3.5–5.5) threads
Standard DIN 374

Technical data for the M15x1.5 machine tap

Technical Data
Nominal Diameter d1 M15x1.5
Thread Pitch P 1.5 mm
Overall Length l1 100 mm
Flute Length l2 10 mm
Shank Diameter d2 12 mm
Square Drive Size a 9 mm
Tap Drill Diameter 13.5 mm
Chamfer B (3.5÷5.5) P
Thread tolerance 6H
M15x1.5 DIN 374 tap – dimensional drawing with lengths and shank dimensions

How the type B through-hole chamfer pushes chips down the hole

Chips exit at the bottom instead of returning through the thread

The form B chamfer for through holes has a chip breaker at the tip of the tap – an angled cut in the cutting edges. The chip breaker directs the chip down the hole, ahead of the tap tip. The chip curls into a coil, breaks into short pieces and exits the hole on the other side of the workpiece. The threads already cut remain clean because the chip does not pass through them on its way up. The M15x1.5 tap has a reduced shank according to DIN 374: diameter 12 mm, square size 9 mm.

M15x1.5 DIN 374 tap – diagram of chip movement and rotation direction during tapping
1
Straight flute – chips do not enter it; the flute carries lubricant to the cutting edges.
2
The chip breaker at the tip of the tap directs chips down the hole.
3
The tap rotates clockwise to cut a right-hand thread.
4
B chamfer: 3.5–5.5 incomplete threads on the entry taper.
5
The chips break into segments: individual pieces at the top of the hole, with progressively more farther down. They fall out below the workpiece.
6
Feed 1.5 mm/rev, equal to the pitch of the M15x1.5 thread.

M15x1.5 fine-thread machine tap – HSSE for industrial applications

The M15x1.5 metric fine thread machine tap is a specialized tool for cutting internal threads with a nonstandard diameter of 15 mm and a pitch of 1.5 mm for industrial applications. Its HSSE high-speed steel construction with 5% added cobalt ensures a hardness of 65-67 HRC and optimum tool life when machining difficult-to-machine materials requiring high precision. The 1.5 mm pitch is a standard fine pitch for diameters in the M14-M16 range, offering a good balance between strength and assembly speed. The tool is designed for professional toolrooms and prototype shops fulfilling industrial orders.

Key features of the M15x1.5 metric fine thread machine tap

  • Nonstandard M15 size fills the gap between the popular M14 and M16 sizes, used in special designs with specific dimensional or strength requirements
  • Fine thread with a 1.5 mm pitch is the standard fine pitch for this diameter group, providing good strength and sealing of the threaded connection
  • HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and thermal resistance up to 650°C required when machining alloy steels and difficult-to-machine materials
  • The 6H tolerance in accordance with DIN 374 ensures thread accuracy and full interchangeability with fasteners used in industry and prototype shops
  • Material versatility covering structural steels up to 800 MPa, alloy steels, austenitic stainless steels 304/316, and gray and ductile cast iron
  • The recommended tap drill diameter of 13.5 mm for the M15x1.5 metric fine thread ensures optimal thread engagement with minimal tool load

The M15x1.5 machine tap is used in industrial hydraulics, prototype shops, and special applications requiring a nonstandard M15 diameter with a fine pitch. Form B with straight flutes directs chips forward when tapping through holes. Cooling with an oil emulsion at a concentration of 6-8% is recommended to maintain optimum tool life.

MaterialCutting speed Vc [m/min]Spindle speed n [rpm]Feed f [mm/min]
PSteel 5-20 106-424 159-636
MStainless steel 5-10 106-212 159-318
KCast iron 5-15 106-318 159-477
NAluminum 10-25 212-531 318-796

Thread preparation M15x1.5 in a through hole

1 Spot drilling

NC spotting drill 90°

2 Drilling

Ø 14.85 mm

3 Tapping

M15x1.5

✓ Done!

Tolerance 6H

Standard: DIN 374 | Chamfer: B (straight) | Application: through 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 M15x1.5 thread is used in industrial hydraulics, prototype shops, and special applications where standard M14 or M16 sizes do not meet design requirements.

The recommended tap drill diameter for the M15x1.5 metric fine thread is 13.5 mm. Precise hole machining ensures full thread engagement.

M15 is a nonstandard size, and M15x1.5 fasteners may require a special order. Checking availability with industrial suppliers in advance is recommended.

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Machine Tap M15X1.5 DIN 374 B HSSE

Machine Tap M15X1.5 DIN 374 B HSSE

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