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Metal drill bit 19.5 NWKc HSS DIN 345 Globus
Net price: €17.37
Description
Technical specifications of the Ø19.5 mm drill bit
Twist drill with Morse taper shank
| TECHNICAL DATA | |
|---|---|
| Diameter | Ø19.5 NWKc HSS |
| Standard | DIN 345 |
| Drill type | NWKc — twist drill with taper shank |
| Material | HSS (high-speed steel) |
| Overall length l1 | 238 mm |
| Flute length l2 | 140 mm |
| Morse taper | MT2 |
| Point angle | 118° |
| Diameter tolerance | h8 |
| Cutting direction | Right-hand |
Ø19.5 mm HSS metal drill bit – Morse taper MT2
Product description and key benefits
The Ø19.5 mm HSS twist drill with an MT2 Morse taper is designed for drilling machines with tapered spindles and power ratings of at least 0.75 kW. In this diameter range, a straight-shank tool requires a drill chuck, which adds another link in the torque transmission path. The Ø19.5 Morse taper drill eliminates this link — it seats directly in the spindle, resulting in better hole quality.
Key benefits of the Ø19.5 mm metal drill bit
- Self-holding taper shank — MT2 transmits full torque to the cutting edges without intermediate components
- HSS with a hardness of 63–65 HRC — stable cutting of materials with tensile strengths up to 900 N/mm² without loss of sharpness
- Overall length of 238 mm — proportional to the drilling diameter — provides a balance between reach and rigidity
- General-purpose 118° geometry — suitable for most materials encountered in shop machining
- Sleeve compatibility — use on drilling machines with MT1 to MT3 spindles using reduction sleeves
- Repeated resharpening — HSS steel allows the cutting edge to be restored without loss of cutting properties
The Ø19.5 Morse taper drill is suitable for drilling holes in hollow sections, medium-thickness sheet metal, and components used in machinery repairs. H12 tolerance (Ø19.500–Ø19.710 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 Ø19.5 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 Ø19.5 mm drill bit according to ISO 513
Recommended machining conditions for a diameter of Ø19.5 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 | 0.16 | 180÷326 | 29÷52 |
| K Cast iron | Gray cast iron GG20–GG30 | 13÷16 | 0.16 | 212÷261 | 34÷42 |
| N Copper and Al alloys | Cu, CuZn, Al, and alloys | 25÷28 | 0.20÷0.25 | 408÷457 | 82÷114 |
Coolant selection when drilling diameters of 19.5
At a diameter of 19.5 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 58 mm.
Material compatibility of the Ø19.5 mm drill bit
Range of workpiece materials and application limitations
Frequently asked questions about the Ø19.5 mm drill bit
Use cooling with a 5–8% emulsion, do not exceed the recommended cutting parameters, and resharpen the tool before it becomes completely dull. Clean taper and spindle socket surfaces reduce runout — the main cause of accelerated wear.
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.
Product accessories
19.5 mm HSS DIN 338 fluted metal drill bit
Reference: 0000004467 In stock > 10 items
€10.36 brutto
Long reduction sleeve MK1-2 PTPb 1762
Reference: 0000006908 In stock > 10 items
€19.42 brutto
Reduction sleeve MK4 MK2 1751 PTPa DIN 228
Reference: 1181 In stock > 10 items
€19.42 brutto
Reduction sleeve MK5 MK2 1751 PTPa DIN 228
Reference: 4910 In stock > 10 items
€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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