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Metal drill bit 56 NWKc HSS DIN 345 Baildon
0000006209
Diameter (mm): 56301 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
€184.50 tax inc.
Net price: €150.00
Description
DIAMETER Ø56 mm
MORSE TAPER MT5
OVERALL LENGTH 417 mm
FLUTE LENGTH 230 mm
Technical specifications of the Ø56 mm drill bit
Twist drill with Morse taper shank
| TECHNICAL DATA | |
|---|---|
| Diameter | Ø56 NWKc HSS |
| Standard | DIN 345 |
| Drill type | NWKc — twist drill with taper shank |
| Material | HSS (high-speed steel) |
| Overall length l1 | 417 mm |
| Flute length l2 | 230 mm |
| Morse taper | MT5 |
| Point angle | 118° |
| Diameter tolerance | h8 |
| Cutting direction | Right-hand |
Ø56 mm HSS metal drill bit – Morse taper MT5
Product description and key benefits
The Ø56 mm NWKc twist drill with an MT5 taper operates in the large-diameter range, where chip evacuation and cutting zone cooling become critical to cutting edge life. The MT5 taper with a diameter of 44.40 mm provides rigidity proportional to the forces generated when machining holes larger than 50 mm. The Ø56 Morse taper drill requires a box-column or radial drilling machine with power feed.
Key benefits of the Ø56 mm metal drill bit
- Self-holding taper shank — MT5 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 417 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 MT4 to MT6 spindles using reduction sleeves
- Repeated resharpening — HSS steel allows the cutting edge to be restored without loss of cutting properties
The Ø56 Morse taper drill is designed for specialized drilling operations in heavy machinery plants and shipyards. For diameters in the MT5 range, every operation requires planning — from the pilot hole to the selection of cutting parameters. H12 tolerance holes, Ø56.000–Ø56.300 mm; fits are achieved by boring.
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 Ø56 MM DRILL BIT:
| ✓ | MT5 → MT6 — for a spindle with an MT6 socket |
| ✓ | MT5 → MT4 — not recommended (socket capacity below the operating load) |
| ✓ | MT5 drill drift — for removing the drill bit from the spindle |
Cutting data for the Ø56 mm drill bit according to ISO 513
Recommended machining conditions for a diameter of Ø56 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 | 0.32 | 63÷114 | 20÷36 |
| K Cast iron | Gray cast iron GG20–GG30 | 13÷16 | 0.32 | 74÷91 | 24÷29 |
| N Copper and Al alloys | Cu, CuZn, Al, and alloys | 25÷28 | 0.40÷0.50 | 142÷159 | 57÷80 |
Vibration at large diameters
At a diameter of 56 mm, the risk of vibration is increased — the long chisel edge generates an asymmetrical load. A Ø20–25 mm pilot hole eliminates chisel edge engagement. Additionally: check spindle runout (max. 0.03 mm) and secure the workpiece with rigid fixtures.
Material compatibility of the Ø56 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 50%, pilot drilling required)
▲ Aluminum and Al alloys (increased Vc, emulsion cooling)
✗ Hardened steels above 45 HRC
Frequently asked questions about the Ø56 mm drill bit
1) Drill a Ø20–25 mm pilot hole. 2) Check runout in the spindle (maximum 0.03 mm). 3) Clamp the workpiece rigidly. 4) Use power feed — manual feed causes uneven pressure and resonance.
Yes — gray cast iron (GG20–GG30) and ductile cast iron (GGG40) are well suited to HSS drills. Short, brittle chips are easier to evacuate from the flutes than steel chips. Dry drilling with a compressed air blast is possible.
H12 tolerance as standard. Reaming or boring is required for H7 or tighter fits — a twist drill cannot achieve these tolerances without finishing.
Product accessories
Reduction sleeve MK6 MK4 1751 PTPa DIN 228
Reference: 1186 In stock < 10 items
€36.84
€45.32 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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