Sutton 6.5mm R40 UNI-IK Jobber Drill Bit - Metric - Cobalt
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The Sutton D182 R40 UNI-IK is a through-coolant jobber drill in 5% cobalt high speed steel (HSS-Co) with a TiAlN coating. It has 40° right-hand helix flutes (R40, internal coolant), a 130° 4 facet Form B point and a DIN 1835 Form E (HE) shank.
Alternative to carbide where the application lacks rigidity; coolant fed directly to the cutting edges to help evacuate the swarf from the hole; for use in CNC machines with through spindle coolant supply; endmill shank for greater accuracy; TiAlN for longer tool life.
This is the metric range: 54 sizes from 5 to 24 mm, with flute lengths of 44 to 145 mm and overall lengths of 82 to 207 mm.
Where this product is used
- CNC machines with through-spindle coolant, where the application lacks the rigidity for carbide.
- Materials rated Optimal for this drill: precipitation-hardening stainless steel; grey cast iron; nodular cast iron; malleable cast iron; cast aluminium and magnesium alloys (up to 12% Si); and chilled and hardened cast iron.
- Also rated Effective: high-alloy and tool steels; austenitic stainless steel; duplex stainless steel; wrought aluminium and magnesium alloys; aluminium and magnesium cast alloys over 12% Si; thermosetting and fibre-reinforced plastics; Fe-based high-temperature alloys; Ni / Co based high-temperature alloys; titanium and titanium alloys; and hardened steel (45 to 62 HRC).
- Rated Optimal for some grades and Effective for others: non-alloy steels; low-alloy steels; ferritic and martensitic stainless steels; and copper alloys, brass and bronze.
- Hole depths to 5 × Ø. Step feeding or pecking is required beyond 3 × Ø.
Finish
Titanium aluminium nitride (TiAlN). TiAlN has a microhardness of 3300 HV and thermal stability up to about 900 °C (1652 °F), and is used for abrasive and difficult-to-machine materials such as stainless steel, higher speeds and feeds, and reduced or no coolant.
Cutting speeds and feeds
Cutting speeds (Vc) and feed numbers for this drill are from the Sutton High Performance catalogue application guide. The table lists the material groups covered. Optimal ratings are shown in bold and Effective ratings in regular type. The rpm and feed columns show what the speed and feed number work out to at Ø6 mm and Ø10 mm (speed in rpm = Vc × 1000 ÷ (π × Ø)). Treat these as starting values and adjust for the machine, set-up and coolant.
| Material (VDI 3323 group) | Rating | Vc (m/min) | Feed no. | Ø6 mm: rpm / feed | Ø10 mm: rpm / feed |
|---|---|---|---|---|---|
| Non-alloy steel, about 0.15 %C, annealed (125 HB) | Optimal | 65 | 7 | 3,450 rpm / 0.19 mm/rev | 2,070 rpm / 0.3 mm/rev |
| Non-alloy steel, about 0.45 %C, annealed (190 HB) | Optimal | 55 | 7 | 2,920 rpm / 0.19 mm/rev | 1,750 rpm / 0.3 mm/rev |
| Non-alloy steel, about 0.45 %C, quenched and tempered (250 HB) | Optimal | 50 | 7 | 2,650 rpm / 0.19 mm/rev | 1,590 rpm / 0.3 mm/rev |
| Non-alloy steel, about 0.75 %C, annealed (270 HB) | Optimal | 50 | 7 | 2,650 rpm / 0.19 mm/rev | 1,590 rpm / 0.3 mm/rev |
| Non-alloy steel, about 0.75 %C, quenched and tempered (300 HB) | Effective | 25 | 5 | 1,330 rpm / 0.12 mm/rev | 795 rpm / 0.19 mm/rev |
| Low-alloy and cast steel (under 5% alloying), annealed (180 HB) | Optimal | 50 | 7 | 2,650 rpm / 0.19 mm/rev | 1,590 rpm / 0.3 mm/rev |
| Low-alloy steel, quenched and tempered (275 HB) | Optimal | 40 | 7 | 2,120 rpm / 0.19 mm/rev | 1,270 rpm / 0.3 mm/rev |
| Low-alloy steel, quenched and tempered (300 HB) | Effective | 25 | 5 | 1,330 rpm / 0.12 mm/rev | 795 rpm / 0.19 mm/rev |
| Low-alloy steel, quenched and tempered (350 HB) | Effective | 15 | 5 | 795 rpm / 0.12 mm/rev | 475 rpm / 0.19 mm/rev |
| High-alloy, cast and tool steel, annealed (200 HB) | Effective | 25 | 5 | 1,330 rpm / 0.12 mm/rev | 795 rpm / 0.19 mm/rev |
| High-alloy, cast and tool steel, hardened and tempered (325 HB) | Effective | 15 | 5 | 795 rpm / 0.12 mm/rev | 475 rpm / 0.19 mm/rev |
| Corrosion-resistant steel, ferritic / martensitic, annealed (200 HB) | Optimal | 14 | 3 | 745 rpm / 0.08 mm/rev | 445 rpm / 0.12 mm/rev |
| Corrosion-resistant steel, martensitic, quenched and tempered (240 HB) | Effective | 15 | 5 | 795 rpm / 0.12 mm/rev | 475 rpm / 0.19 mm/rev |
| Austenitic stainless steel, age hardened (180 HB) | Effective | 16 | 4 | 850 rpm / 0.1 mm/rev | 510 rpm / 0.16 mm/rev |
| Duplex stainless steel (250 HB) | Effective | 12 | 4 | 635 rpm / 0.1 mm/rev | 380 rpm / 0.16 mm/rev |
| Precipitation-hardening stainless steel (250 HB) | Optimal | 14 | 3 | 745 rpm / 0.08 mm/rev | 445 rpm / 0.12 mm/rev |
| Grey cast iron, ferritic / pearlitic (180 HB) | Optimal | 40 | 6 | 2,120 rpm / 0.16 mm/rev | 1,270 rpm / 0.24 mm/rev |
| Grey cast iron, pearlitic (260 HB) | Optimal | 35 | 6 | 1,860 rpm / 0.16 mm/rev | 1,110 rpm / 0.24 mm/rev |
| Nodular cast iron, ferritic (160 HB) | Optimal | 40 | 5 | 2,120 rpm / 0.12 mm/rev | 1,270 rpm / 0.19 mm/rev |
| Nodular cast iron, pearlitic (250 HB) | Optimal | 40 | 5 | 2,120 rpm / 0.12 mm/rev | 1,270 rpm / 0.19 mm/rev |
| Malleable cast iron, ferritic (130 HB) | Optimal | 40 | 5 | 2,120 rpm / 0.12 mm/rev | 1,270 rpm / 0.19 mm/rev |
| Malleable cast iron, pearlitic (230 HB) | Optimal | 40 | 5 | 2,120 rpm / 0.12 mm/rev | 1,270 rpm / 0.19 mm/rev |
| Wrought aluminium and magnesium alloy, non heat treatable (60 HB) | Effective | 60 | 6 | 3,180 rpm / 0.16 mm/rev | 1,910 rpm / 0.24 mm/rev |
| Wrought aluminium and magnesium alloy, heat treatable (100 HB) | Effective | 60 | 6 | 3,180 rpm / 0.16 mm/rev | 1,910 rpm / 0.24 mm/rev |
| Cast aluminium and magnesium alloy (up to 12% Si), non heat treatable (75 HB) | Optimal | 40 | 5 | 2,120 rpm / 0.12 mm/rev | 1,270 rpm / 0.19 mm/rev |
| Cast aluminium and magnesium alloy (up to 12% Si), heat treatable (90 HB) | Optimal | 40 | 5 | 2,120 rpm / 0.12 mm/rev | 1,270 rpm / 0.19 mm/rev |
| Aluminium and magnesium cast alloy over 12% Si (130 HB) | Effective | 40 | 5 | 2,120 rpm / 0.12 mm/rev | 1,270 rpm / 0.19 mm/rev |
| Copper alloys, free cutting, Pb over 1% (110 HB) | Effective | 50 | 5 | 2,650 rpm / 0.12 mm/rev | 1,590 rpm / 0.19 mm/rev |
| Brass (CuZn, CuSnZn) (90 HB) | Optimal | 36 | 5 | 1,910 rpm / 0.12 mm/rev | 1,150 rpm / 0.19 mm/rev |
| Bronze (CuSn) (100 HB) | Optimal | 45 | 5 | 2,390 rpm / 0.12 mm/rev | 1,430 rpm / 0.19 mm/rev |
| Thermosetting and fibre-reinforced plastics | Effective | 70 | 5 | 3,710 rpm / 0.12 mm/rev | 2,230 rpm / 0.19 mm/rev |
| High-temperature alloy, Fe based, annealed (200 HB) | Effective | 8 | 3 | 425 rpm / 0.08 mm/rev | 255 rpm / 0.12 mm/rev |
| High-temperature alloy, Fe based, age hardened (280 HB) | Effective | 8 | 3 | 425 rpm / 0.08 mm/rev | 255 rpm / 0.12 mm/rev |
| High-temperature alloy, Ni / Co based, annealed (250 HB) | Effective | 8 | 3 | 425 rpm / 0.08 mm/rev | 255 rpm / 0.12 mm/rev |
| High-temperature alloy, Ni / Co based, age hardened (350 HB) | Effective | 8 | 3 | 425 rpm / 0.08 mm/rev | 255 rpm / 0.12 mm/rev |
| High-temperature alloy, Ni / Co based, cast (320 HB) | Effective | 8 | 3 | 425 rpm / 0.08 mm/rev | 255 rpm / 0.12 mm/rev |
| Titanium, commercially pure (400 MPa) | Effective | 8 | 3 | 425 rpm / 0.08 mm/rev | 255 rpm / 0.12 mm/rev |
| Titanium alpha alloys (860 MPa) | Effective | 8 | 3 | 425 rpm / 0.08 mm/rev | 255 rpm / 0.12 mm/rev |
| Titanium alpha / beta alloys, annealed (960 MPa) | Effective | 8 | 3 | 425 rpm / 0.08 mm/rev | 255 rpm / 0.12 mm/rev |
| Titanium alpha / beta alloys, age hardened (1170 MPa) | Effective | 8 | 3 | 425 rpm / 0.08 mm/rev | 255 rpm / 0.12 mm/rev |
| Titanium beta alloys, annealed (830 MPa) | Effective | 8 | 3 | 425 rpm / 0.08 mm/rev | 255 rpm / 0.12 mm/rev |
| Titanium beta alloys, age hardened (1400 MPa) | Effective | 8 | 3 | 425 rpm / 0.08 mm/rev | 255 rpm / 0.12 mm/rev |
| Hardened steel, 45 HRC | Effective | 10 | 4 | 530 rpm / 0.1 mm/rev | 320 rpm / 0.16 mm/rev |
| Chilled cast iron (400 HB) | Optimal | 35 | 6 | 1,860 rpm / 0.16 mm/rev | 1,110 rpm / 0.24 mm/rev |
Feed rates (mm/rev) for the feed numbers above:
| Ø (mm) | Feed no. 3 (mm/rev) | Feed no. 4 (mm/rev) | Feed no. 5 (mm/rev) | Feed no. 6 (mm/rev) | Feed no. 7 (mm/rev) |
|---|---|---|---|---|---|
| 2 | 0.03 | 0.04 | 0.05 | 0.06 | 0.075 |
| 3 | 0.045 | 0.055 | 0.07 | 0.09 | 0.11 |
| 4 | 0.06 | 0.075 | 0.09 | 0.12 | 0.14 |
| 5 | 0.07 | 0.09 | 0.11 | 0.14 | 0.17 |
| 6 | 0.08 | 0.1 | 0.12 | 0.16 | 0.19 |
| 8 | 0.1 | 0.13 | 0.16 | 0.2 | 0.25 |
| 10 | 0.12 | 0.16 | 0.19 | 0.24 | 0.3 |
| 12 | 0.15 | 0.18 | 0.23 | 0.28 | 0.34 |
| 16 | 0.19 | 0.23 | 0.29 | 0.36 | 0.44 |
| 20 | 0.23 | 0.28 | 0.34 | 0.42 | 0.52 |
| 25 | 0.27 | 0.33 | 0.41 | 0.5 | 0.6 |
Drilling notes
- Step feeding or pecking is required for drilling greater than 3 x Ø.
- When drilling a cast or black (not machined) surface, reduce the drilling speed by 20%.
- For optimal positional accuracy and hole size, the use of spot drills is recommended prior to drilling the desired hole; see Sutton's spotting drill range (D175).
- For hole depths greater than 7 x Ø, pre-drill a pilot hole first for more accurate hole position and to stop the drill wandering. The pilot can be drilled with a short, rigid drill about 3 x Ø deep at reduced feed.
Accuracy
The drill diameter (d1) tolerance is h8. An h8 drill diameter may be at nominal or smaller, never larger.
| Drill diameter (mm) | h8 tolerance (minus only, ISO 286-2) |
|---|---|
| 0.2 to 3 | 14 µm |
| 3 to 6 | 18 µm |
| 6 to 10 | 22 µm |
| 10 to 18 | 27 µm |
| 18 to 30 | 33 µm |
| 30 to 50 | 39 µm |
Troubleshooting
- Drill breaks. Dull point: sharpen; Drill has front taper due to wearing: sharpen; Insufficient lip clearance on point: grind correctly; Lip clearance too great: regrind to correct clearance angle.
- Outer corner breaks down. Flutes clogged with chips: remove drill from hole and clear the flutes; Cutting speed too high: reduce speed; Dry cutting, no lubricant at cutting edges: apply cutting fluid.
- Cutting edges chip. Lip clearance too great: regrind to correct clearance angle; Feed too heavy: reduce feed.
- Hole rough. Dull point: sharpen; Feed too heavy: reduce feed; Dry cutting, no lubricant at cutting edges: apply cutting fluid; Fixture/clamping not rigid: secure job firmly.
- Hole oversize. Unequal angle or uneven length of cutting edges: regrind to same lip lengths and angles; Spindle run-out / loose spindle: check machine.
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | D182 |
| Range | R40 UNI-IK Cobalt Jobber Drill |
| Material | High Speed Steel Cobalt (HSS Co, 5% cobalt) |
| Finish | Titanium aluminium nitride (TiAlN) |
| Flute geometry | 40° right-hand helix (R40 IK) |
| Point | 130° 4 facet Form B |
| Shank | DIN 1835 Form E (HE) shank |
| Drill diameter tolerance (d1) | h8 |
| Designation | NH |
| Drilling depth | up to 5 × Ø |
| Sizes in this range | 54 sizes, 5-24mm |
Related drilling products
Compare other Sutton drills: D168 R40 UNI, D163 DHJ, D169 Black Magic and D329 3xD through-coolant carbide. Browse all Cobalt Drill Bits. Need help choosing? Our guide to choosing the right drill bit and drill bit selection guide cover drill types and materials, and the speeds and feeds chart and cutting tool troubleshooting guide cover speeds and common problems.
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