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Machine Tap M25x1.5 DIN 374 B HSSE Narex
0000008170
Thread size: M25x1,561 sizes of this tap
M5x0,5M10x1M10x1,25M11x0,75M12x1M12x1,25M12x1,5M14x1M14x1,25M14x1,5M15x1M15x1,25M15x1,5M16x1M16x1,5M17x1M18x1M18x1,5M18x2M20x0,75M20x1M20x1,25M20x1,5M20x2M22x1,5M22x2M24x1M24x1,5M24x2M25x1M25x1,5M25x2M26x1,5M27x1,5M28x1,5M30x1,5M30x2M30x3M32x1M32x1,5M32x2M33x1,5M33x2M35x1,5M36x1,5M36x2M36x3M38x1,5M39x1,5M39x2M40x1,5M42x1,5M42x2M42x3M48x1,5M50x2M52x2M56x3M60x3M64x3M64x4
€71.21 tax inc.
Net price: €57.89
Description
Material HSSE
Thread size M25x1.5
ChamferB (3.5–5.5) threads
Standard DIN 374
Technical data for the M25x1.5 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M25x1.5 |
| Thread Pitch P | 1.5 mm |
| Overall Length l1 | 140 mm |
| Flute Length l2 | 27 mm |
| Shank Diameter d2 | 18 mm |
| Square Drive Size a | 14.5 mm |
| Tap Drill Diameter | 23.5 mm |
| Chamfer | B (3.5÷5.5) P |
| Thread tolerance | 6H |
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 M25x1.5 tap has a reduced shank according to DIN 374: diameter 18 mm, square size 14.5 mm.
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 M25x1.5 thread.
M25x1.5 metric fine thread machine tap – HSSE Narex for hydraulics
The M25x1.5 fine-thread machine tap from manufacturer Narex is a professional tool for cutting internal threads with a nonstandard diameter of 25 mm in industrial hydraulic components. HSSE high-speed steel with 5% cobalt provides a hardness of 65-67 HRC and high heat resistance in the cutting zone up to 650°C. The M25x1.5 metric fine thread combines fine-thread precision with a nonstandard diameter used in specialized hydraulic applications. The Narex brand guarantees the highest manufacturing quality.
Key features of the Narex M25x1.5 machine tap
- The Narex brand as a renowned cutting tool manufacturer with a long-standing tradition, guarantees the highest manufacturing quality and consistent geometric parameters
- Nonstandard M25 size used in specialized industrial and hydraulic applications where standard sizes do not meet the requirements
- Fine thread with a 1.5 mm pitch provides good sealing of hydraulic connections and twice the adjustment precision of a coarse thread
- HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and heat resistance up to 650°C, extending cutting edge life
- Tolerance 6H according to DIN 374 ensures precise thread production and full interchangeability with fasteners
- Recommended tap drill diameter 23.5 mm for the M25x1.5 metric fine thread ensures optimal thread engagement
The Narex M25x1.5 machine tap is used in specialized hydraulic applications, custom component production, and prototyping where an M25 diameter is required. The metric fine thread provides good connection sealing. Cooling with an emulsion containing EP additives at a concentration of 8-10% is recommended.
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 64-255 | 96-382 |
| MStainless steel | 5-10 | 64-127 | 96-190 |
| KCast iron | 5-15 | 64-191 | 96-286 |
| NAluminum | 10-25 | 127-318 | 190-477 |
Thread preparation M25x1.5 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 23.5 mm
3 Tapping
M25x1.5
✓ Done!
Tolerance 6H
Standard: DIN 374 | Chamfer: B (straight) | Application: through 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 M25x1.5 thread is used in specialized hydraulic applications, prototyping, and wherever standard M24 or M27 sizes do not meet design requirements.
The recommended tap drill diameter for the M25x1.5 metric fine thread is 23.5 mm. Accurate hole preparation is essential for leak-tight connections.
Narex is a reputable manufacturer with a long tradition, offering tools with consistent quality and repeatable geometric specifications. Narex taps offer good value for money.
Product accessories
Machine Tap M25x1.5 DIN 374/40 C HSSE
Reference: 0000009395 In stock > 10 items
€63.16
€77.68 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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