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Description
Material HSSE
Thread size M42
ChamferB (3.5–5.5) threads
Standard DIN 376
Technical data for the M42 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 | B (3.5÷5.5) |
| Thread tolerance | 6H |
M42 machine tap for through holes – cobalt HSSE with a long shank DIN 376
The M42 machine tap for through holes from the HSSE series is designed to produce M42 internal threads in through holes on CNC and conventional machine tools. The long shank conforming to DIN 376 provides increased clamping rigidity and better tool guidance when tapping large diameters. 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. Size M42 is used in heavy industry and the power industry.
Key features of the M42 machine tap for through holes
- Large M42 diameter used in heavy machinery manufacturing, steel structures, the power industry, and mining
- Long shank to DIN 376 provides greater clamping rigidity and improved tool guidance, which is essential when tapping M42 diameters
- HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and heat resistance up to 650°C, extending cutting edge life
- The 6H tolerance to DIN 376 ensures thread precision and full interchangeability with standard-class fasteners
- Compatibility with ER40 tool holders and tapping chucks with axial compensation for CNC machining centers
- Metric pitch of 4.5 mm in accordance with DIN 13 for M42 coarse threads, with a recommended tap drill diameter of 37.5 mm
The M42 machine tap for through holes is used in structural component production, heavy machinery construction, and maintenance departments for repairing and restoring large-diameter threads. Form B with straight flutes ensures efficient chip evacuation. The tool requires cooling with an oil emulsion at a minimum concentration of 8-10%.
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 38-152 | 171-684 |
| MStainless steel | 5-10 | 38-76 | 171-342 |
| KCast iron | 5-15 | 38-114 | 171-513 |
| NAluminum | 10-25 | 76-189 | 342-850 |
Thread preparation M42 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 37.5 mm
3 Tapping
M42
✓ Done!
Tolerance 6H
Standard: DIN 376 | 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 M42 HSSE tap performs well in structural steels up to 800 MPa, alloy steels, stainless steels, gray cast iron, and ductile iron. The addition of 5% cobalt increases heat resistance.
The recommended tap drill diameter for the M42 coarse thread is 37.5 mm. Accurate hole preparation ensures a full thread profile and minimizes the load on the tap.
The M42 DIN 376 tap with a long shank works with ER40 tool holders and tapping chucks with axial compensation. The long shank requires tool holders with sufficient clamping depth.
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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