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Machine Tap M25x2 DIN 374 B HSSE
2644
Thread size: M25x261 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
€113.29 tax inc.
Net price: €92.11
Description
Material HSSE
Thread size M25x2
ChamferB (3.5–5.5) threads
Standard DIN 374
Technical data for the M25x2 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M25x2 |
| Thread Pitch P | 2 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 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 M25x2 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 2 mm/rev, equal to the pitch of the M25x2 thread.
M25x2 metric fine thread machine tap – HSSE for special designs
The M25x2 metric fine thread machine tap is designed for precise tapping of holes with a nonstandard diameter of 25 mm. Its HSSE high-speed steel construction with 5% added cobalt ensures a hardness of 65-67 HRC and optimum tool life when machining materials with strengths up to 800 MPa. The M25x2 metric fine thread combines higher strength with a nonstandard diameter used in specialized machine designs. The 6H tolerance in accordance with DIN 374 ensures the dimensional repeatability required in specialized production.
Why choose the M25x2 metric fine thread machine tap
- Nonstandard M25 size used in specialized industrial applications where standard M24 or M27 sizes do not meet design requirements
- Fine thread with a 2 mm pitch offers higher tensile strength than a coarse thread while maintaining fast assembly
- 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
- Material versatility covering structural steels up to 800 MPa, alloy steels, gray and ductile cast iron, and aluminum
- Recommended tap drill diameter 23 mm for the M25x2 metric fine thread ensures optimal thread engagement
The M25x2 machine tap is used in specialized machine designs, prototyping, and the production of nonstandard components. 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.
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 64-255 | 128-510 |
| MStainless steel | 5-10 | 64-127 | 128-254 |
| KCast iron | 5-15 | 64-191 | 128-382 |
| NAluminum | 10-25 | 127-318 | 254-636 |
Thread preparation M25x2 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 23.0 mm
3 Tapping
M25x2
✓ 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 M25x2 thread is used in specialized machine designs, prototyping, and wherever standard M24 or M27 sizes do not meet requirements and higher connection strength is needed.
The recommended tap drill diameter for the M25x2 metric fine thread is 23 mm. Precise hole machining ensures full thread engagement.
M25 is a nonstandard size, and fasteners may be less readily available than for standard M24 or M27 sizes. Checking availability with suppliers in advance is recommended.
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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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