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Machine Tapping M20x1.25 DIN 374 C HSSE
0000005574
Thread size: M20x1,2575 sizes of this tap
M3x0,35M3,5x0,35M4x0,5M5x0,5M6x0,75M8x0,75M8x1M10x0,5M10x0,75M10x1M10x1,25M11x1M12x1M12x1,25M12x1,5M14x1M14x1,25M14x1,5M15x1M15x1,5M16x0,75M16x1M16x1,5M16x1,75M17x0,75M17x1M18x1M18x1,25M18x1,5M18x2M19x1M20x1M20x1,25M20x1,5M20x2M22x1M22x1,5M22x2M23x1,25M24x1M24x1,5M24x2M25x1M25x1,5M25x2M27x1M27x1,5M27x2M28x1M28x1,5M28x2M30x1M30x1,5M30x2M32x1,5M32x2M33x1,5M33x2M34x1,5M35x1,5M36x1,5M36x2M36x3M38x1,5M39x1M39x1,5M40x1,5M42x2M48x1,5M48x2M48x3M50x1,5M52x1,5M52x3M56x3
€46.93 tax inc.
Net price: €38.16
Description
Material HSSE
Thread size M20x1.25
ChamferC (2–3) threads
Standard DIN 374
Technical data for the M20x1.25 HSSE INOX general-purpose machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M20x1.25 |
| Thread Pitch P | 1.25 mm |
| Overall Length l1 | 125 mm |
| Flute Length l2 | 24 mm |
| Shank Diameter d2 | 16 mm |
| Square Drive Size a | 12 mm |
| Tap Drill Diameter | 18.8 mm |
| Chamfer | C (2÷3) P |
| Thread tolerance | 6H |
Where chips remain in a straight-flute tap
The flute holds the chips until the tap is reversed out
The straight flute runs parallel to the tap axis. There is no helix to carry chips upward. The chamfer cutting edges are not ground at an angle, so they do not push chips downward. Short chips break into fragments and remain in the flute, next to the cutting edges that produced them. They leave the hole only when the tap is backed out. The M20x1.25 tap has a reduced shank to DIN 374: diameter 16 mm, square size 12 mm.
1
Straight flute – chips remain in the flute, next to the cutting edges that produced them.
2
Chamfer C: 2–3 incomplete threads on the tapered lead.
3
The tap rotates clockwise to cut a right-hand thread.
4
Individual fragments exit at the top, onto the workpiece surface.
5
A few fragments fall below the tip and exit through the bottom of the hole.
6
Feed 1.25 mm/rev, equal to the pitch of the M20x1.25 thread.
M20x1.25 INOX machine tap – for CNC machining
In this line, the manufacturer offers the M20x1.25 INOX machine tap with optimized cutting geometry for fine threads with a pitch of 1.25 mm. The tool meets the requirements of DIN 374 and provides thread tolerance class 6H required in series production of mechanical and precision components. Its HSSE steel construction with 5% cobalt guarantees a hardness of 66 HRC and resistance to temperatures up to 650°C in the cutting zone. Form C with straight flutes provides general-purpose capability for through holes and blind holes in stainless and structural steels.
Advantages of the M20x1.25 INOX tap
- Compatibility with ER32 holders collets and synchronized tapping chucks for CNC machining centers with automatic tool change
- Durability increased by the addition of cobalt in HSSE steel extends cutting edge life by 40-60% compared with standard HSS taps
- Material versatility covering austenitic stainless steels 304 and 316, structural steels up to 800 MPa and nonferrous metals such as aluminum and brass
- Precision to tolerance class 6H meeting the requirements of series production of mechanical and pneumatic components with tight fit tolerances
- Conforms to DIN 374 for fine threads ensures standardized shank dimensions and interchangeability with tools from European manufacturers
- M20x1.25 general-purpose machine tap with form C ensures proper chip evacuation in through holes and blind holes without the risk of jamming
The M20x1.25 HSSE machine tap is used in toolrooms and prototype shops for one-off and small-batch production of precision components. The M20x1.25 machine tap for through holes and blind holes performs well in the production of automation components. The tap drill diameter for the M20x1.25 thread is 18.75 mm.
Cutting data for the M20x1.25 HSSE INOX general-purpose machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 80-318 | 100-398 |
| MStainless steel / INOX | 5-10 | 80-159 | 100-199 |
| KCast iron | 5-15 | 80-239 | 100-299 |
| NAluminum | 10-25 | 159-398 | 199-498 |
Thread preparation M20x1.25
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 18.8 mm
3 Tapping
M20x1.25
✓ Done!
Tolerance 6H
Standard: DIN 374 | Chamfer: C (straight) | Application: general-purpose (through and 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 M20x1.25 HSSE tap is suitable for austenitic stainless steels 304 and 316, structural steels up to 800 MPa, ductile cast iron, and aluminum and brass alloys. It is not recommended for hardened steels above 45 HRC.
The nominal tap drill diameter for the M20x1.25 thread is 18.75 mm. The hole tolerance range should be 18.65–18.85 mm. A hole at the lower tolerance limit produces a fuller thread profile, while one at the upper limit reduces tapping torque.
The M20x1.25 tap works with ER32 holders and tapping chucks with axial compensation. Synchronized heads with automatic tool change capability are recommended for CNC machines.
Product accessories
Machine tap M20x1.25 DIN 374 B HSSE
Reference: 0000007207 In stock < 10 items
€32.89
€40.46 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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