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Machine Tap M18x1.5 DIN 374/35 C HSSE
0000008249
€30.75 tax inc.
Net price: €25.00
Description
Material HSSE
Thread size M18x1.5
ChamferC (2–3) threads
Standard DIN 374
Technical data for the M18x1.5 blind hole tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M18x1.5 |
| Thread Pitch P | 1.5 mm |
| Helix Angle | 35° |
| Overall Length l1 | 110 mm |
| Flute Length l2 | 24 mm |
| Length l3 | 48 mm |
| Shank Diameter d2 | 14 mm |
| Square Drive Size a | 11 mm |
| Tap Drill Diameter | 16.5 mm |
| Chamfer | C (2÷3) P |
| Thread tolerance | 6H |
How a spiral flute tap evacuates chips from a blind hole
The 35° flute works like a screw conveyor
The flutes of this tap follow a right-hand helix at an angle of 35° to the axis. The tap rotates clockwise and advances into the hole. Chips cut by the chamfer enter the flute, and the helix carries them upward like the auger in a meat grinder. The bottom of the hole stays clear, and the cutting edges do not encounter packed chips. The M18x1.5 tap has a reduced shank to DIN 374: diameter 14 mm, square drive 11 mm.
1
The 35° spiral flute carries chips upward from the chamfer.
2
The stepped chip exits the hole and breaks into short pieces.
3
The tap rotates clockwise to cut a right-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 1.5 mm/rev, equal to the pitch of the M18x1.5 thread.
M18x1.5 spiral flute machine tap – metric fine thread for industrial hydraulics
The M18x1.5 spiral flute machine tap from the metric fine thread series is designed to produce leak-tight connections in hydraulic and pneumatic systems. HSSE steel construction with 5% cobalt provides a hardness of 65-67 HRC and high cutting edge heat resistance up to 650°C. The 35° spiral flute ensures controlled chip evacuation when tapping deep blind holes. Its form C chamfer makes the tool particularly suitable for tapping close to the bottom of blind holes. The 6H tolerance conforming to DIN 374 meets precision manufacturing requirements.
Key features of the M18x1.5 spiral flute machine tap
- Manufacturing precision to 6H tolerance guarantees dimensional repeatability and full thread interchangeability in series production of mechanical components
- Compliance with DIN 374 confirms quality and ensures standardized dimensions for metric fine threads compatible with European standards
- Durability of HSSE steel with 5% cobalt allows operation at temperatures up to 650°C without loss of the cutting edge's mechanical properties
- Compatibility with ER32 and ER40 tool holders and tapping heads for CNC machining centers with synchronous tapping capability
- Designed for industrial hydraulics includes valve blocks, cylinder bodies, manifolds, and pressure system components
- 35° spiral flutes ensure consistent chip evacuation when tapping blind holes up to 2.5D deep without the risk of breakage
The M18x1.5 spiral flute tap is well suited to maintenance departments for thread restoration and production machinery repairs. The fine pitch of 1.5 mm provides a larger contact area than the standard M18x2.5 thread. The tap drill diameter for the M18x1.5 thread is 16.5 mm according to metric fine thread tables.
Cutting data for the M18x1.5 blind hole machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 88-354 | 132-531 |
| MStainless steel | 5-10 | 88-177 | 132-266 |
| KCast iron | 5-15 | 88-265 | 132-398 |
| NAluminum | 10-25 | 177-442 | 266-663 |
Thread preparation M18x1.5 in a blind hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 16.5 mm
3 Tapping
M18x1.5
✓ Done!
Tolerance 6H
Standard: DIN 374 | Chamfer: C (spiral flute) | Application: 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 M18x1.5 HSSE machine tap for metric fine threads performs well in structural steels with a tensile strength up to 900 MPa, 304/316 austenitic stainless steels, aluminum, and brass. The 1.5 mm pitch is used in industrial hydraulics and pressure valves and fittings.
For the M18x1.5 metric fine thread in tolerance class 6H, the recommended tap drill diameter is 16.5 mm. The hole tolerance zone should fall within the range of 16.5 to 16.7 mm. Exceeding the upper limit results in an incomplete thread profile.
Yes, cooling with an oil emulsion of at least 8% or with tapping oil is recommended and extends tool life by a factor of 2-3. Intensive cooling is required when machining stainless steels, while aluminum can be tapped with minimum quantity lubrication (MQL).
Product accessories
HSSE 16.5 cobalt metal drill bit DIN 338
Reference: 13295 In stock < 10 items
€17.63
€21.69 brutto
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| 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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