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Description
Material HSSE
Thread size M30
ChamferB (3.5–5.5) threads
Standard DIN 376
Technical data for the M30 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M30 |
| Thread Pitch P | 3.5 mm |
| Overall Length l1 | 180 mm |
| Flute Length l2 | 45 mm |
| Shank Diameter d2 | 22 mm |
| Square Drive Size a | 18 mm |
| Tap Drill Diameter | 26.5 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 type B through-hole chamfer has a chip breaker at the tip of the tap – an angled notch in the cutting edges. The chip breaker directs chips down the hole, ahead of the tap tip. The chips curl into a spring shape, break into short pieces and exit the hole on the other side of the workpiece. The threads already cut remain clean because the chips do not pass through them on their way up. The M30 x3.5 tap has a reduced shank to DIN 376: diameter 22 mm, square size 18 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 3.5 mm/rev, equal to the pitch of the M30 x3.5 thread.
M30 machine tap for through holes – cobalt HSSE with a long shank DIN 376
The M30 machine tap for through holes is a professional tool for cutting M30 internal threads in through holes on CNC machine tools and conventional machines. Its HSSE high-speed steel construction with 5% added cobalt provides a hardness of 65-67 HRC and high heat resistance in the cutting zone up to 650°C. The long shank in accordance with DIN 376 ensures increased clamping rigidity and improved tool guidance when tapping large diameters. The M30 size is used in heavy machinery construction and steel structures.
Key benefits of the M30 machine tap for through holes
- Large M30 diameter used in heavy machinery construction, steel structures, and the energy industry
- Long shank to DIN 376 provides greater clamping rigidity and improved tool guidance, which is essential when tapping M30 diameters
- HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and heat resistance up to 650°C, extending cutting edge life
- Tolerance 6H according to DIN 376 ensures accurate threads and full interchangeability with standard-grade fasteners
- Compatibility with ER40 holders and tapping chucks with axial compensation for CNC machining centers
- Metric pitch of 3.5 mm compliant with DIN 13 for M30 coarse threads, the recommended tap drill diameter is 26.5 mm
The M30 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 | 53-212 | 186-742 |
| MStainless steel | 5-10 | 53-106 | 186-371 |
| KCast iron | 5-15 | 53-159 | 186-556 |
| NAluminum | 10-25 | 106-265 | 371-928 |
Thread preparation M30 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 26.5 mm
3 Tapping
M30
✓ 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 M30 HSSE tap performs well in structural steels with strengths up to 800 MPa, alloy steels, stainless steels, gray and ductile cast iron, and aluminum. The addition of 5% cobalt increases heat resistance.
The recommended tap drill diameter for the M30 coarse thread is 26.5 mm. Accurate hole preparation ensures a full thread profile and minimizes the load on the tap.
The M30 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
Machine tap M30 DIN 376/35 C HSSE Narex
Reference: 001579 In stock < 10 items
€55.26
€67.97 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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