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Description
DIAMETER Ø10.2 mm
MORSE TAPER MT1
OVERALL LENGTH 168 mm
FLUTE LENGTH 87 mm
Technical specifications of the Ø10.2 mm drill bit
Twist drill with Morse taper shank
| TECHNICAL DATA | |
|---|---|
| Diameter | Ø10.2 NWKc HSSE |
| Standard | DIN 345 |
| Drill type | NWKc — twist drill with taper shank |
| Material | HSSE (cobalt high-speed steel) |
| Overall length l1 | 168 mm |
| Flute length l2 | 87 mm |
| Morse taper | MT1 |
| Point angle | 118° |
| Diameter tolerance | h8 |
| Cutting direction | Right-hand |
Ø10.2 mm HSSE twist drill – MT1 Morse taper
Product description and key benefits
The Ø10.2 mm twist drill with an MT1 Morse taper achieves higher hole accuracy than comparable straight-shank drills — direct mounting in the spindle shortens the torque transmission path and reduces radial runout. The tool is designed for stationary drilling machines: pillar machines, bench machines with an MT1 spindle, and box-column machines. The Ø10.2 Morse taper drill with a flute length of 87 mm is sufficient for holes in sheet metal and sections of typical shop thicknesses.
Key benefits of the Ø10.2 mm metal drill bit
- 5% cobalt in the HSS matrix — raises the tempering temperature to 650°C — 50°C higher than standard HSS
- Direct mounting in an MT1 spindle — eliminates the chuck as a source of runout — particularly important when drilling stainless steels, where runout reduces surface quality
- Drilling austenitic steels — the HSSE cutting edge handles work hardening in 304/316/321 steels
- h8 diameter tolerance — repeatable hole size even in difficult-to-machine materials
- Conforms to DIN 345 — dimensions identical to HSS — a replacement for use in existing machining cells
- Repeated resharpening — HSSE steel retains its properties after the cutting edge is reground on a tool grinder
The Ø10.2 Morse taper drill bit is most often selected for mounting holes in hollow sections, thick plates, and machine components. In toolrooms, it is used to prepare preliminary holes before reaming to a dowel pin fit. Holes are produced to tolerance class H12 (Ø10.200–Ø10.380 mm); if class H7 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 Ø10.2 MM DRILL BIT:
| ✓ | MT1 → MT2 — for a spindle with an MT2 socket |
| ✓ | MT1 → MT3 — for a spindle with an MT3 socket |
| ✓ | MT1 drill drift — for removing the drill bit from the spindle |
Cutting data for the Ø10.2 mm drill bit according to ISO 513
Recommended machining conditions for a diameter of Ø10.2 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 | 0.12 | 343÷624 | 41÷75 |
| K Cast iron | Gray cast iron GG20–GG30 | 13÷16 | 0.12 | 406÷499 | 49÷60 |
| N Copper and Al alloys | Cu, CuZn, Al, and alloys | 25÷28 | 0.16÷0.20 | 780÷874 | 125÷175 |
Drill sharpening
Sharpen the Ø10.2 mm drill bit on a tool grinder, maintaining the 118° point angle and cutting edge symmetry. Asymmetric sharpening enlarges the hole diameter and loads the spindle unevenly. Each sharpening reduces the flute length by approximately 1–2 mm.
Material compatibility of the Ø10.2 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 Ø10.2 mm drill bit
The maximum drilling depth is the flute length l2 = 87 mm minus the drill point length (approximately 3 mm). The effective usable depth is therefore approximately 84 mm.
In S235/S355 structural steels, spot drilling is not necessary — the 118° angle provides self-centering. Spot drilling with an NC 90° drill is recommended when drilling on milled surfaces, castings with machining allowance, or difficult-to-machine materials.
A cooling and lubricating emulsion at a concentration of 5–8% is recommended. For stainless steels, increase the concentration to 8–10%. Cast iron can be drilled dry with compressed air to remove chips.
Product accessories
Reduction sleeve MK4 MK1 1751 PTPa DIN 228
Reference: 1179 In stock > 10 items
€15.79
€19.42 brutto
Reduction sleeve MK3 MK1 1751 PTPa DIN 228
Reference: 1184 In stock > 10 items
€11.84
€14.57 brutto
Reduction sleeve MK5 MK1 1751 PTPa DIN 228
Reference: 1185 In stock > 10 items
€22.37
€27.51 brutto
Reduction sleeve MK2 MK1 1751 PTPa DIN 228
Reference: 2586 In stock > 10 items
€9.21
€11.33 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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