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Description
DIAMETER Ø23 mm
MORSE TAPER MT2
OVERALL LENGTH 253 mm
FLUTE LENGTH 155 mm
Technical specifications of the Ø23 mm drill bit
Twist drill with Morse taper shank
| TECHNICAL DATA | |
|---|---|
| Diameter | Ø23 NWKc HSSE |
| Standard | DIN 345 |
| Drill type | NWKc — twist drill with taper shank |
| Material | HSSE (cobalt high-speed steel) |
| Overall length l1 | 253 mm |
| Flute length l2 | 155 mm |
| Morse taper | MT2 |
| Point angle | 118° |
| Diameter tolerance | h8 |
| Cutting direction | Right-hand |
Ø23 mm HSSE twist drill – MT2 Morse taper
Product description and key benefits
The Ø23 mm HSS twist drill with an MT2 Morse taper combines versatile applications with secure spindle mounting. The self-holding taper eliminates the need for a drill chuck, which becomes a weak link in the torque transmission system at diameters above 13 mm. The Ø23 Morse taper drill is suitable for drilling holes for bolted connections, locating pins, and guide bushings.
Key benefits of the Ø23 mm metal drill bit
- HSSE steel with 5% cobalt — heat resistance up to 650°C allows drilling in 304/316 stainless steels without rapid dulling of the cutting edge
- Morse taper MT2 — self-holding mounting in the spindle eliminates slippage at the high cutting torques generated in difficult-to-machine steels
- Increased hot hardness — cobalt in the steel matrix increases resistance to tempering — essential at low Vc and the high cutting resistance of austenitic steels
- DIN 345 — full interchangeability with HSS drills of the same size and compatibility with reduction sleeves
- Flute length 155 mm — drilling through holes in components up to 140 mm thick
- Machining INOX steel without coatings — HSSE geometry and composition allow drilling in acid-resistant steels without TiN/TiAlN coatings
The Ø23 Morse taper drill is suitable for drilling holes in hollow sections, medium-thickness sheet metal, and components used in machinery repairs. H12 tolerance (Ø23.000–Ø23.210 mm) is sufficient for assembly holes; if H7 tolerance is required, additional reaming is necessary.
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 Ø23 MM DRILL BIT:
| ✓ | MT2 → MT3 — for a spindle with an MT3 socket |
| ✓ | MT2 → MT4 — for a spindle with an MT4 socket |
| ✓ | MT2 drill drift — for removing the drill bit from the spindle |
Cutting data for the Ø23 mm drill bit according to ISO 513
Recommended machining conditions for a diameter of Ø23 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 | 152÷277 | 30÷55 |
| K Cast iron | Gray cast iron GG20–GG30 | 13÷16 | 0.20 | 180÷221 | 36÷44 |
| N Copper and Al alloys | Cu, CuZn, Al, and alloys | 25÷28 | 0.25÷0.32 | 346÷388 | 86÷124 |
Coolant selection when drilling diameters of 23
At a diameter of 23 mm, the volume of chips removed increases significantly — the helical flutes must evacuate more material per centimeter of depth. Use an emulsion with a concentration of 6–8% at a minimum delivery rate of 3 l/min. Without pressurized cooling, limit the depth of each pass to 69 mm.
Material compatibility of the Ø23 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 Ø23 mm drill bit
In S235/S355 structural steels, spot drilling is not necessary — the 118° angle provides self-centering. Spotting with a 90° NC spotting drill is recommended when drilling on uneven or inclined surfaces, where the drill may slip away from the marked point.
The HSS drill can be used for stainless steel with Vc reduced by 40% and ample cooling with a 8–10% emulsion. An HSSE (cobalt) drill of the same diameter is a more efficient option, retaining its hardness up to 650°C.
A pillar or box-column drilling machine with an MT2 spindle and a minimum power rating of 0.75–1.5 kW. Bench drilling machines with a drill chuck are not recommended — they cannot transmit the torque generated at a diameter of 23 mm.
Product accessories
Long reduction sleeve MK1-2 PTPb 1762
Reference: 0000006908 In stock > 10 items
€15.79
€19.42 brutto
Reduction sleeve MK4 MK2 1751 PTPa DIN 228
Reference: 1181 In stock > 10 items
€15.79
€19.42 brutto
Reduction sleeve MK5 MK2 1751 PTPa DIN 228
Reference: 4910 In stock > 10 items
€22.37
€27.51 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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