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Description
Material HSSE
Thread size M2
ChamferB (3.5–5.5) threads
Standard DIN 371
Technical data for the M2 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M2 |
| Thread Pitch P | 0.4 mm |
| Overall Length l1 | 45 mm |
| Flute Length l2 | 10 mm |
| Length l3 | 13 mm |
| Shank Diameter d2 | 2.8 mm |
| Square Drive Size a | 2.1 mm |
| Tap Drill Diameter | 1.6 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 through-hole chamfer has a chip breaker at the front of the tap – an angled cut in the cutting edges. The chip breaker directs chips 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. Threads already cut remain clean because chips do not pass through them on their way up. The M2 x0.4 tap has a reinforced shank in accordance with DIN 371: diameter 2.8 mm, square 2.1 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 0.4 mm/rev, equal to the pitch of the M2 x0.4 thread.
M2 machine tap for through holes – cobalt HSSE for stainless steel
The M2 machine tap for through holes from the HSSE series is designed for cutting internal threads with the smallest standard metric diameter of 2 mm in stainless steels and difficult-to-machine materials. The high-speed steel construction with 5% cobalt provides a hardness of 65-67 HRC and high heat resistance in the cutting zone up to 650°C, essential when machining austenitic steels. Size M2 is the smallest standard metric thread, requiring particular care when tapping difficult-to-machine materials due to its small diameter. The tool is intended for professional toolrooms and precision component manufacturers.
Technical specifications of the M2 HSSE machine tap
- Smallest metric thread M2 with a diameter of 2 mm requires particular care when tapping due to the low core strength and susceptibility to breakage under excessive torque
- HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and heat resistance up to 650°C, essential for tapping stainless steels and difficult-to-machine materials
- Designed for stainless steels austenitic 304/316 and ferritic, where standard HSS steel does not provide sufficient heat resistance and tool life
- The 6H tolerance in accordance with DIN 371 ensures thread accuracy and full interchangeability with fasteners used in electronics and precision engineering
- Short shank according to DIN 371, compatible with ER11 collet chucks and small collets for precise clamping on CNC machining centers
- Metric pitch of 0.4 mm in accordance with DIN 13 for M2 coarse threads, with a recommended tap drill diameter of 1.6 mm requiring precise drilling
The M2 HSSE machine tap is used in the production of medical implants, watch components, laboratory equipment, and wherever the smallest threads in stainless steel are required. Tapping M2 requires low cutting speeds of Vc 3-6 m/min and generous cooling with an emulsion containing EP additives at a concentration of at least 10% to protect the tool.
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 796-3183 | 318-1273 |
| MStainless steel | 5-10 | 796-1592 | 318-637 |
| KCast iron | 5-15 | 796-2387 | 318-955 |
| NAluminum | 10-25 | 1592-3979 | 637-1592 |
Thread preparation M2 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 1.6 mm
3 Tapping
M2
✓ Done!
Tolerance 6H
Standard: DIN 371 | 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 M2 HSSE tap is designed for austenitic stainless steels 304/316, ferritic steels, titanium alloys, and other difficult-to-machine materials requiring heat resistance.
The recommended tap drill diameter for the M2 thread is 1.6 mm. Precise drilling is critical due to the small thread diameter.
For the M2 HSSE tap in stainless steel, a cutting speed of Vc 3-6 m/min and generous cooling with an emulsion containing EP additives at a concentration of at least 10% are recommended.
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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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