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Description
DIAMETER Ø24 mm
MORSE TAPER MT3
OVERALL LENGTH 281 mm
FLUTE LENGTH 160 mm
Technical specifications of the Ø24 mm drill bit
Twist drill with Morse taper shank
| TECHNICAL DATA | |
|---|---|
| Diameter | Ø24 NWKc HSSE |
| Standard | DIN 345 |
| Drill type | NWKc — twist drill with taper shank |
| Material | HSSE (cobalt high-speed steel) |
| Overall length l1 | 281 mm |
| Flute length l2 | 160 mm |
| Morse taper | MT3 |
| Point angle | 118° |
| Diameter tolerance | h8 |
| Cutting direction | Right-hand |
Ø24 mm HSSE twist drill – MT3 Morse taper
Product description and key benefits
The Ø24 mm NWKc twist drill with an MT3 taper operates in a diameter range where adequate rigidity of the spindle–tool system is required. At a diameter of 24 mm, the torque generated when cutting structural steel exceeds the capacity of a typical drill chuck — the Morse taper transmits it directly to the spindle. With a flute length of 160 mm, the Ø24 Morse taper drill allows drilling in plates and sections up to 145 mm thick.
Key benefits of the Ø24 mm metal drill bit
- Cobalt 5% — hardness up to 67 HRC — greater hardness than standard HSS (63–65 HRC) translates into longer service life between sharpenings
- MT3 Morse taper to DIN 345 — secure, self-holding mounting regardless of load level
- Cutting-edge stability in INOX steels — HSSE does not require as drastic a reduction in Vc as HSS when drilling acid-resistant steels
- Flute length 160 mm — allows drilling through standard structural component thicknesses
- Versatility — drilling structural steels, stainless steels, cast iron, and aluminum with one tool
- 118° angle — self-centering in most materials without spot drilling
The Ø24 Morse taper drill is used mainly in steel construction — industrial buildings, bridges, and viaducts — where holes with diameters of 23–31 mm are standard for assembly connections. In repair shops, it is used to restore holes in machinery. H12 tolerance (Ø24.000–Ø24.210 mm); H7 fits are achieved with a reamer.
Morse tapers – dimensions to DIN 228
Dimension table for all Morse tapers MT0–MT6
| Taper | Diameter D [mm] | Length [mm] |
|---|---|---|
| MT0 | 9.045 | 49.8 |
| MT1 | 12.065 | 53.5 |
| MT2 | 17.780 | 64.0 |
| MT3 | 23.825 | 80.5 |
| MT4 | 31.267 | 117.5 |
| MT5 | 44.399 | 149.5 |
| MT6 | 63.348 | 210.0 |
REDUCTION SLEEVES COMPATIBLE WITH THE Ø24 MM DRILL BIT:
| ✓ | MT3 → MT4 — for a spindle with an MT4 socket |
| ✓ | MT3 → MT5 — for a spindle with an MT5 socket |
| ✓ | MT3 drill drift — for removing the drill bit from the spindle |
Cutting data for the Ø24 mm drill bit according to ISO 513
Recommended machining conditions for a diameter of Ø24 mm
| ISO symbol | Workpiece material | Vc [m/min] | f [mm/rev] | n [rpm] | Vf [mm/min] |
|---|---|---|---|---|---|
| P Steel | Structural steel up to 900 N/mm² | 11÷20 | 0.20 | 146÷265 | 29÷53 |
| K Cast iron | Gray cast iron GG20–GG30 | 13÷16 | 0.20 | 172÷212 | 34÷42 |
| N Copper and Al alloys | Cu, CuZn, Al, and alloys | 25÷28 | 0.25÷0.32 | 332÷371 | 83÷119 |
Deep-hole drilling (over 3×D)
When drilling holes deeper than 72 mm (3×Ø24), use peck drilling with retraction every 1×D. Use ample emulsion coolant at a minimum concentration of 6–8%. Reduce the feed by 30–50%.
Material compatibility of the Ø24 mm drill bit
Range of workpiece materials and application limitations
✓ Structural steel (S235, S355) up to 900 N/mm²
✓ Gray and ductile cast iron (GG20, GGG40)
✓ Low-carbon and medium-alloy steel
▲ Stainless steel (Vc reduced by 30%, ample coolant)
▲ Aluminum and Al alloys (emulsion coolant required)
✗ Hardened steels above 45 HRC
Frequently asked questions about the Ø24 mm drill bit
Use peck drilling: retract the drill every 1–1.5×D, clear chips from the flutes, and cool with a 6–8% emulsion. Reduce the feed by 30–50% from the nominal value.
Spot drilling is not necessary on flat surfaces in structural steels. Spotting with a 90° NC spotting drill is recommended when drilling on inclined surfaces, castings with machining allowance, and flame-cut surfaces.
The HSS drill can handle stainless steel with Vc reduced by 40% and ample coolant. For regular INOX machining, an HSSE (cobalt) drill of the same diameter is recommended.
Product accessories
Reduction sleeve MK4 MK3 1751 PTPa DIN 228
Reference: 1180 In stock > 10 items
€18.42
€22.66 brutto
Reduction sleeve MK6 MK3 1751 PTPa DIN 228
Reference: 11965 In stock < 10 items
€36.84
€45.32 brutto
Reduction sleeve MK5 MK3 1751 PTPa DIN 228
Reference: 5702 In stock > 10 items
€26.32
€32.37 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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