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Machine tap M14x1.25 DIN 374 B HSSE
10860
Thread size: M14x1,2561 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
€25.25 tax inc.
Net price: €20.53
Description
Material HSSE
Thread size M14x1.25
ChamferB (3.5–5.5) threads
Standard DIN 374
Technical data for the M14x1.25 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M14x1.25 |
| Thread Pitch P | 1.25 mm |
| Overall Length l1 | 100 mm |
| Flute Length l2 | 20 mm |
| Shank Diameter d2 | 11 mm |
| Square Drive Size a | 9 mm |
| Tap Drill Diameter | 12.8 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 M14x1.25 tap has a reduced shank according to DIN 374: diameter 11 mm, square size 9 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 1.25 mm/rev, equal to the pitch of the M14x1.25 thread.
M14x1.25 fine-thread machine tap – HSSE for automotive applications
The M14x1.25 fine-thread machine tap in the HSSE series is designed for cutting internal threads with a pitch of 1.25 mm in the popular M14 diameter used in the automotive industry. The 1.25 mm pitch is an automotive industry standard, widely used in spark plug screws and engine components requiring reliable threaded joints. Its high-speed steel construction with 5% cobalt provides a hardness of 65-67 HRC and high thermal resistance in the cutting zone up to 650°C. The tool is intended for automotive parts manufacturers and automotive service shops requiring professional tools.
Key features of the M14x1.25 metric fine thread machine tap
- Fine thread with a 1.25 mm pitch is an automotive industry standard, widely used in spark plug screws and engine components requiring reliable joints
- Increased load-bearing area of the thread of the fine thread results in approximately 60% higher tensile strength than the M14x2 coarse thread, with better vibration resistance
- HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and heat resistance up to 650°C, extending cutting edge life under intensive use
- The 6H tolerance in accordance with DIN 374 ensures accurate threads and full interchangeability with fasteners used in the automotive industry
- Compatibility with ER20 and ER25 holders and tapping chucks with axial compensation for CNC machining centers with synchronous tapping capability
- The recommended tap drill diameter of 12.8 mm for the M14x1.25 metric fine thread ensures optimal thread engagement with minimal tool load
The M14x1.25 machine tap is used in automotive manufacturing, automotive service shops, and internal combustion engine repairs requiring professional tapping tools. The M14x1.25 thread is standard for spark plugs and engine sensors. Cooling with an oil emulsion at a concentration of 6-8% is recommended to maintain optimum tool life.
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 114-455 | 142-569 |
| MStainless steel | 5-10 | 114-227 | 142-284 |
| KCast iron | 5-15 | 114-341 | 142-426 |
| NAluminum | 10-25 | 227-568 | 284-710 |
Thread preparation M14x1.25 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 12.8 mm
3 Tapping
M14x1.25
✓ 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 M14x1.25 thread is standard for spark plugs because it offers an optimum balance between strength and the ability to withstand repeated installation and removal without damaging the thread in the cylinder head.
The recommended tap drill diameter for the M14x1.25 metric fine thread is 12.8 mm. Precise hole machining ensures full thread engagement.
Yes, M14x1.25 is a standard automotive pitch, and fasteners are widely available from automotive and industrial suppliers.
Product accessories
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Reference: 0000007138 In stock < 10 items
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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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