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Description
Material HSSE
Thread size M42
ChamferC (2–3) threads
Standard DIN 376
Technical data for the M42 HSSE INOX general-purpose machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M42 |
| Thread Pitch P | 4.5 mm |
| Overall Length l1 | 200 mm |
| Flute Length l2 | 05 mm |
| Shank Diameter d2 | 32 mm |
| Square Drive Size a | 24 mm |
| Tap Drill Diameter | 37.5 mm |
| Chamfer | C (2÷3) |
| Thread tolerance | 6H |
M42 INOX machine tap – universal HSSE for stainless steel
The M42 INOX machine tap with a long shank conforming to DIN 376 is designed for precision tapping of holes with a diameter of 42 mm and a coarse pitch of 4.5 mm in stainless and structural steels. HSSE high-speed steel construction with 5% cobalt ensures a hardness of 66 HRC and long cutting edge life, even when machining difficult-to-machine materials. Form C with straight flutes provides universal use in through and blind holes. The 6H tolerance conforming to DIN 376 confirms high manufacturing quality. The M42 HSSE machine tap is intended for departments engaged in series production of hydraulic components.
Key features of the M42 universal tap
- Long shank to DIN 376 provides increased clamping rigidity and eliminates vibration at the high cutting torques typical of large diameters
- Compliance with DIN 376 confirms quality and ensures standardized long-shank dimensions compatible with European tool holders
- Durability increased by the addition of 5% cobalt allows operation at temperatures up to 650°C without loss of cutting edge performance
- Material versatility covering austenitic stainless steels 304 and 316, structural steels up to 800 MPa, gray and ductile cast iron, and aluminum alloys
- Compatibility with ER40 holders and tapping heads for CNC machining centers with synchronous tapping and automatic tool changing
- M42 machine tap for through holes and blind holes with form C allows both hole types to be tapped with a single tool without the risk of jamming
The M42 universal machine tap is used in steel structures and industrial hydraulic systems requiring durable threaded connections. The M42 HSSE machine tap is suitable for manufacturing fitting components. The tap drill diameter for the M42 thread is 37.5 mm for the coarse thread with a pitch of 4.5 mm.
Cutting data for the universal M42 HSSE INOX machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 38-152 | 171-684 |
| MStainless steel / INOX | 5-10 | 38-76 | 171-342 |
| KCast iron | 5-15 | 38-114 | 171-513 |
| NAluminum | 10-25 | 76-189 | 342-850 |
Thread preparation M42
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 37.5 mm
3 Tapping
M42
✓ Done!
Tolerance 6H
Standard: DIN 376 | 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 M42 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 M42 thread is 37.5 mm. The hole tolerance zone should be within the range of 37.4–37.6 mm. A hole at the lower tolerance limit produces a fuller thread profile, while a hole at the upper limit reduces tapping torque.
The M42 tap works with ER40 holders and tapping chucks with axial compensation. Synchronized heads with automatic tool change capability are recommended for CNC machines.
Product accessories
Metal drill bit 37.5 NWKc HSS DIN 345 Werko
Reference: 0420 In stock > 10 items
€44.74
€55.03 brutto
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| 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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