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Description
Material HSSE
Thread size M48
ChamferC (2–3) threads
Standard DIN 376
Technical data for the M48 HSSE INOX general-purpose machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M48 |
| Thread Pitch P | 5 mm |
| Overall Length l1 | 250 mm |
| Flute Length l2 | 70 mm |
| Shank Diameter d2 | 36 mm |
| Square Drive Size a | 29 mm |
| Tap Drill Diameter | 43 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 M48 x5 tap has a reduced shank to DIN 376: diameter 36 mm, square size 29 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 5 mm/rev, equal to the pitch of the M48 x5 thread.
M48 INOX machine tap – versatile HSSE tool
The HSSE series with long shanks according to DIN 376, designed for manufacturing engineers and CNC operators working with large diameters, includes the M48 INOX machine tap with increased rigidity. The 6H tolerance in accordance with DIN 376 guarantees the dimensional repeatability required in the manufacture of mechanical components with demanding specifications. The long shank eliminates vibration at the high cutting torques typical of the largest diameters. Its HSSE steel construction with 5% cobalt guarantees a hardness of 66 HRC and long cutting edge life in stainless and difficult-to-machine steels.
Key features of the M48 tap for through and blind holes
- Long shank to DIN 376 provides increased clamping rigidity and eliminates vibration at the high cutting torques typical of large diameters
- Designed for stainless steels of austenitic grades 304 and 316, structural steels up to 800 MPa, and aluminum alloys and engineering brass
- Precision of the 6H tolerance required in the production of hydraulic housings, valve blocks, and components for high-pressure industrial valves and fittings
- Durability thanks to HSSE steel with 5% cobalt allows 300-450 threads to be produced in structural steel with proper lubrication using tapping oil
- Compatibility with ER40 holders and tapping heads for CNC machining centers with synchronous tapping and axial compensation
- Universal M48 machine tap with form C directs chips correctly in both through holes and blind holes without the risk of jamming
The M48 HSSE machine tap is designed for machining hydraulic power components and industrial valves and fittings. The M48 machine tap for through and blind holes is not recommended for steels hardened above 45 HRC. The tap drill diameter is 43 mm for a coarse thread with a pitch of 5 mm.
Cutting data for the universal M48 HSSE INOX machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 33-133 | 165-665 |
| MStainless steel / INOX | 5-10 | 33-66 | 165-330 |
| KCast iron | 5-15 | 33-99 | 165-495 |
| NAluminum | 10-25 | 66-166 | 330-830 |
Thread preparation M48
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 43 mm
3 Tapping
M48
✓ 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
With proper cooling and lubrication, the M48 HSSE tap produces 400-600 threads in structural steel or 250-350 threads in stainless steel. Dry machining reduces tool life by 40-50%.
Yes, the M48 HSSE tap with 5% cobalt is designed for austenitic stainless steels 304 and 316. The cobalt addition increases heat resistance up to 650°C in the cutting zone.
An HSSE tap contains 5% cobalt, which increases hardness from 64 to 66 HRC and heat resistance to 650°C. HSSE is suitable for stainless steels, while HSS is suitable only for structural steels up to 800 MPa.
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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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