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Metal drill bit 11.8 NWKc HSS DIN 345 Baildon
0343
Diameter (mm): 11,8301 sizes of this drill
33,13,23,33,43,53,63,73,83,944,14,24,34,44,54,64,74,84,955,15,25,35,45,55,65,75,85,966,16,26,36,46,56,66,76,86,977,17,157,27,257,37,47,57,67,77,757,87,988,18,28,258,38,48,58,68,78,88,999,19,29,259,39,49,59,69,79,759,89,91010,110,210,310,410,510,610,710,7510,810,91111,111,211,2511,311,411,511,611,711,811,91212,112,212,312,412,512,612,712,812,91313,113,213,2513,313,413,513,613,713,7513,813,91414,2514,414,514,751515,2515,515,751616,2516,516,751717,2517,517,751818,2518,518,751919,2519,519,752020,2520,520,752121,2521,521,752222,2522,522,752323,2523,523,752424,2524,524,752525,2525,525,752626,2526,526,752727,2527,527,752828,2528,528,752929,2529,529,753030,2530,530,753131,2531,531,753232,2532,532,753333,2533,533,753434,2534,534,753535,2535,535,753636,2536,536,753737,2537,537,7537,83838,538,753939,2539,539,754040,2540,54141,54242,54343,54444,54545,54646,546,75474848,54949,55050,55151,55252,553545556575858,55960616263646566676869707172737475767778798081828384858687888990919293949596979899100
€8.09 tax inc.
Net price: €6.58
Description
DIAMETER Ø11.8 mm
MORSE TAPER MT1
OVERALL LENGTH 175 mm
FLUTE LENGTH 94 mm
Technical specifications of the Ø11.8 mm drill bit
Twist drill with Morse taper shank
| TECHNICAL DATA | |
|---|---|
| Diameter | Ø11.8 NWKc HSS |
| Standard | DIN 345 |
| Drill type | NWKc — twist drill with taper shank |
| Material | HSS (high-speed steel) |
| Overall length l1 | 175 mm |
| Flute length l2 | 94 mm |
| Morse taper | MT1 |
| Point angle | 118° |
| Diameter tolerance | h8 |
| Cutting direction | Right-hand |
Ø11.8 mm HSS metal drill bit – Morse taper MT1
Product description and key benefits
The Ø11.8 mm twist drill with an MT1 taper shank conforming to DIN 345 is a basic tool for any pillar drilling machine. Its cutting geometry with a 118° point angle provides self-centering in soft and medium-hard steels without spot drilling. The Ø11.8 Morse taper drill is used to produce mounting holes, through holes, and holes for tapping in metalworking shops and maintenance departments.
Key benefits of the Ø11.8 mm metal drill bit
- MT1 taper — direct mounting — eliminates the drill chuck as a source of radial runout and tool slippage
- HSS cutting edge, 63–65 HRC — hardness that ensures stable cutting of steels with tensile strengths up to 900 N/mm² throughout the interval between sharpenings
- Right-hand helical flutes — effective chip evacuation from the cutting zone — essential when drilling holes deeper than 2×D
- Compact 175 mm design — shorter tool overhang provides greater rigidity and less vibration
- Repeated reconditioning — the HSS cutting edge can be resharpened 8–12 times while retaining its geometry — at l2 = 94 mm, the resharpening allowance is approximately 11 mm
- Sleeve compatibility — use on drilling machines with MT1 to MT2 spindles using reduction sleeves
The Ø11.8 mm Morse taper drill is selected for repair and assembly work on pillar drilling machines. The tool allows fast drilling of through and blind holes in steels with tensile strengths up to 900 N/mm². H12 tolerance at Ø11.800–Ø11.980 mm provides dimensional accuracy sufficient for most bolted connections.
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 Ø11.8 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 Ø11.8 mm drill bit according to ISO 513
Recommended machining conditions for a diameter of Ø11.8 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 | 297÷540 | 36÷65 |
| K Cast iron | Gray cast iron GG20–GG30 | 13÷16 | 0.12 | 351÷432 | 42÷52 |
| N Copper and Al alloys | Cu, CuZn, Al, and alloys | 25÷28 | 0.16÷0.20 | 674÷755 | 108÷151 |
Spot drilling
When drilling on uneven surfaces, castings with machining allowance, or inclined planes, spot drilling with an NC 90° drill is recommended before using the Ø11.8 mm drill. The spot-drilled hole stabilizes the point position and prevents the cutting edge from slipping away from the marked location.
Material compatibility of the Ø11.8 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 40%, ample coolant)
▲ Aluminum and Al alloys (emulsion coolant required)
✗ Hardened steels above 45 HRC
Frequently asked questions about the Ø11.8 mm drill bit
Yes — using an MT1→MT2 reduction sleeve. The sleeve ensures proper seating of the taper in the larger spindle socket. Use a correctly sized drill drift for removal.
The maximum drilling depth is the flute length l2 = 94 mm minus the drill point length (approximately 4 mm). The effective usable depth is therefore approximately 90 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.
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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