Sutton 1.1mm D155 R40 UNI Stub Drill Bit - Metric - SPM TiAlN
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The Sutton D155 is a R40 UNI SPM stub drill (designation UNI) made from powder-metallurgy 11% cobalt high speed steel (SPM) with a TiAlN coating. It has 40° right-hand helix flutes (R40), a 130° 4 facet Form B point and an endmill shank, d2 to h7, and is made to approximately DIN 1897.
SPM is designed to give superior performance, and the drill is suited to production drilling as an alternative to carbide drills, in materials up to 1500 N/mm². The point geometry is designed for high strength and short chips, the endmill shank for greater accuracy, and the TiAlN coating for longer tool life.
This range has 135 sizes from 1 to 20 mm, with flute lengths of 6 to 66 mm and overall lengths of 38 to 131 mm.
Where this product is used
- Shallow, rigid drilling on CNC machines and drill presses, where the short stub length keeps the drill stiff.
- Materials up to 1500 N/mm².
- Production drilling as an alternative to carbide drills, using the SPM substrate and the endmill shank for accuracy.
- Materials rated Optimal for this drill: non-alloy steels; precipitation-hardening stainless steel; grey cast iron; nodular cast iron; malleable cast iron; cast aluminium and magnesium alloys (up to 12% Si); and chilled cast iron.
- Also rated Effective: austenitic stainless steel; duplex stainless steel; wrought aluminium and magnesium alloys; thermosetting and fibre-reinforced plastics; annealed Ni / Co based high-temperature alloy; titanium alpha alloys; and hardened steel (45 HRC).
- Rated Optimal for some grades and Effective for others: low-alloy steels; high-alloy and tool steels; ferritic and martensitic stainless steels; and copper alloys, brass and bronze.
- Hole depths up to 3 × Ø. Step feeding or pecking is required beyond 3 × Ø.
Finish
Titanium aluminium nitride (TiAlN) has a microhardness of 3300 HV and is stable to about 900 °C (1652 °F). It is used on abrasive and difficult-to-machine materials such as stainless steel, at higher speeds and feeds, and with reduced or no coolant.
Cutting speeds and feeds
Cutting speeds (Vc) and feed numbers for this drill come from the Sutton High Performance catalogue application guide, which lists 34 material groups for this drill. The guide prints Optimal ratings in bold and Effective ratings in regular type, and the table below keeps that split. 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 | 6 | 3,450 rpm / 0.16 mm/rev | 2,070 rpm / 0.24 mm/rev |
| Non-alloy steel, about 0.45 %C, annealed (190 HB) | Optimal | 55 | 6 | 2,920 rpm / 0.16 mm/rev | 1,750 rpm / 0.24 mm/rev |
| Non-alloy steel, about 0.45 %C, quenched and tempered (250 HB) | Optimal | 50 | 6 | 2,650 rpm / 0.16 mm/rev | 1,590 rpm / 0.24 mm/rev |
| Non-alloy steel, about 0.75 %C, annealed (270 HB) | Optimal | 50 | 6 | 2,650 rpm / 0.16 mm/rev | 1,590 rpm / 0.24 mm/rev |
| Non-alloy steel, about 0.75 %C, quenched and tempered (300 HB) | Optimal | 25 | 6 | 1,330 rpm / 0.16 mm/rev | 795 rpm / 0.24 mm/rev |
| Low-alloy and cast steel (under 5% alloying), annealed (180 HB) | Optimal | 50 | 6 | 2,650 rpm / 0.16 mm/rev | 1,590 rpm / 0.24 mm/rev |
| Low-alloy steel, quenched and tempered (275 HB) | Optimal | 35 | 6 | 1,860 rpm / 0.16 mm/rev | 1,110 rpm / 0.24 mm/rev |
| Low-alloy steel, quenched and tempered (300 HB) | Optimal | 25 | 6 | 1,330 rpm / 0.16 mm/rev | 795 rpm / 0.24 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) | Optimal | 25 | 6 | 1,330 rpm / 0.16 mm/rev | 795 rpm / 0.24 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 | 4 | 745 rpm / 0.1 mm/rev | 445 rpm / 0.16 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 | 5 | 850 rpm / 0.12 mm/rev | 510 rpm / 0.19 mm/rev |
| Duplex stainless steel (250 HB) | Effective | 12 | 5 | 635 rpm / 0.12 mm/rev | 380 rpm / 0.19 mm/rev |
| Precipitation-hardening stainless steel (250 HB) | Optimal | 14 | 4 | 745 rpm / 0.1 mm/rev | 445 rpm / 0.16 mm/rev |
| Grey cast iron, ferritic / pearlitic (180 HB) | Optimal | 44 | 6 | 2,330 rpm / 0.16 mm/rev | 1,400 rpm / 0.24 mm/rev |
| Grey cast iron, pearlitic (260 HB) | Optimal | 39 | 6 | 2,070 rpm / 0.16 mm/rev | 1,240 rpm / 0.24 mm/rev |
| Nodular cast iron, ferritic (160 HB) | Optimal | 44 | 5 | 2,330 rpm / 0.12 mm/rev | 1,400 rpm / 0.19 mm/rev |
| Nodular cast iron, pearlitic (250 HB) | Optimal | 44 | 5 | 2,330 rpm / 0.12 mm/rev | 1,400 rpm / 0.19 mm/rev |
| Malleable cast iron, ferritic (130 HB) | Optimal | 44 | 5 | 2,330 rpm / 0.12 mm/rev | 1,400 rpm / 0.19 mm/rev |
| Malleable cast iron, pearlitic (230 HB) | Optimal | 44 | 5 | 2,330 rpm / 0.12 mm/rev | 1,400 rpm / 0.19 mm/rev |
| Wrought aluminium and magnesium alloy, non heat treatable (60 HB) | Effective | 88 | 5 | 4,670 rpm / 0.12 mm/rev | 2,800 rpm / 0.19 mm/rev |
| Wrought aluminium and magnesium alloy, heat treatable (100 HB) | Effective | 88 | 5 | 4,670 rpm / 0.12 mm/rev | 2,800 rpm / 0.19 mm/rev |
| Cast aluminium and magnesium alloy (up to 12% Si), non heat treatable (75 HB) | Optimal | 53 | 5 | 2,810 rpm / 0.12 mm/rev | 1,690 rpm / 0.19 mm/rev |
| Cast aluminium and magnesium alloy (up to 12% Si), heat treatable (90 HB) | Optimal | 53 | 5 | 2,810 rpm / 0.12 mm/rev | 1,690 rpm / 0.19 mm/rev |
| Copper alloys, free cutting, Pb over 1% (110 HB) | Effective | 39 | 4 | 2,070 rpm / 0.1 mm/rev | 1,240 rpm / 0.16 mm/rev |
| Brass (CuZn, CuSnZn) (90 HB) | Optimal | 44 | 5 | 2,330 rpm / 0.12 mm/rev | 1,400 rpm / 0.19 mm/rev |
| Bronze (CuSn) (100 HB) | Effective | 33 | 4 | 1,750 rpm / 0.1 mm/rev | 1,050 rpm / 0.16 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, Ni / Co based, annealed (250 HB) | Effective | 8 | 4 | 425 rpm / 0.1 mm/rev | 255 rpm / 0.16 mm/rev |
| Titanium alpha alloys (860 MPa) | Effective | 9 | 4 | 475 rpm / 0.1 mm/rev | 285 rpm / 0.16 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 | 39 | 6 | 2,070 rpm / 0.16 mm/rev | 1,240 rpm / 0.24 mm/rev |
Feed rates (mm/rev) for the feed numbers above:
| Ø (mm) | Feed no. 4 (mm/rev) | Feed no. 5 (mm/rev) | Feed no. 6 (mm/rev) |
|---|---|---|---|
| 2 | 0.04 | 0.05 | 0.06 |
| 3 | 0.055 | 0.07 | 0.09 |
| 4 | 0.075 | 0.09 | 0.12 |
| 5 | 0.09 | 0.11 | 0.14 |
| 6 | 0.1 | 0.12 | 0.16 |
| 8 | 0.13 | 0.16 | 0.2 |
| 10 | 0.16 | 0.19 | 0.24 |
| 12 | 0.18 | 0.23 | 0.28 |
| 16 | 0.23 | 0.29 | 0.36 |
| 20 | 0.28 | 0.34 | 0.42 |
| 25 | 0.33 | 0.41 | 0.5 |
Sizes and item numbers
Every size in the range, with its Sutton item number, flute length (l2) and overall length (l1).
| Item no. | Diameter d1 (mm) | Flute length l2 (mm) | Overall length l1 (mm) | Shank d2 (mm) |
|---|---|---|---|---|
| D155 0100 | 1 | 6 | 38 | 3 |
| D155 0110 | 1.1 | 7 | 39 | 3 |
| D155 0120 | 1.2 | 8 | 40 | 3 |
| D155 0130 | 1.3 | 8 | 40 | 3 |
| D155 0140 | 1.4 | 9 | 41 | 3 |
| D155 0150 | 1.5 | 9 | 41 | 3 |
| D155 0160 | 1.6 | 10 | 42 | 3 |
| D155 0170 | 1.7 | 10 | 42 | 3 |
| D155 0180 | 1.8 | 11 | 43 | 3 |
| D155 0190 | 1.9 | 11 | 43 | 3 |
| D155 0200 | 2 | 12 | 44 | 3 |
| D155 0210 | 2.1 | 12 | 44 | 3 |
| D155 0220 | 2.2 | 13 | 45 | 3 |
| D155 0230 | 2.3 | 13 | 45 | 3 |
| D155 0240 | 2.4 | 14 | 46 | 3 |
| D155 0250 | 2.5 | 14 | 46 | 3 |
| D155 0260 | 2.6 | 14 | 46 | 3 |
| D155 0270 | 2.7 | 16 | 46 | 3 |
| D155 0280 | 2.8 | 16 | 46 | 3 |
| D155 0290 | 2.9 | 16 | 46 | 3 |
| D155 0300 | 3 | 16 | 46 | 3 |
| D155 0310 | 3.1 | 18 | 49 | 4 |
| D155 0320 | 3.2 | 18 | 49 | 4 |
| D155 0330 | 3.3 | 18 | 49 | 4 |
| D155 0340 | 3.4 | 20 | 52 | 4 |
| D155 0350 | 3.5 | 20 | 52 | 4 |
| D155 0360 | 3.6 | 20 | 52 | 4 |
| D155 0370 | 3.7 | 20 | 52 | 4 |
| D155 0380 | 3.8 | 22 | 55 | 4 |
| D155 0390 | 3.9 | 22 | 55 | 4 |
| D155 0400 | 4 | 22 | 55 | 4 |
| D155 0410 | 4.1 | 22 | 55 | 6 |
| D155 0420 | 4.2 | 22 | 55 | 6 |
| D155 0430 | 4.3 | 24 | 58 | 6 |
| D155 0440 | 4.4 | 24 | 58 | 6 |
| D155 0450 | 4.5 | 24 | 58 | 6 |
| D155 0460 | 4.6 | 24 | 58 | 6 |
| D155 0470 | 4.7 | 24 | 58 | 6 |
| D155 0480 | 4.8 | 26 | 62 | 6 |
| D155 0490 | 4.9 | 26 | 62 | 6 |
| D155 0500 | 5 | 26 | 62 | 6 |
| D155 0510 | 5.1 | 26 | 62 | 6 |
| D155 0520 | 5.2 | 26 | 62 | 6 |
| D155 0530 | 5.3 | 26 | 62 | 6 |
| D155 0540 | 5.4 | 28 | 66 | 6 |
| D155 0550 | 5.5 | 28 | 66 | 6 |
| D155 0560 | 5.6 | 28 | 66 | 6 |
| D155 0570 | 5.7 | 28 | 66 | 6 |
| D155 0580 | 5.8 | 28 | 66 | 6 |
| D155 0590 | 5.9 | 28 | 66 | 6 |
| D155 0600 | 6 | 28 | 66 | 6 |
| D155 0610 | 6.1 | 31 | 70 | 8 |
| D155 0620 | 6.2 | 31 | 70 | 8 |
| D155 0630 | 6.3 | 31 | 70 | 8 |
| D155 0640 | 6.4 | 31 | 70 | 8 |
| D155 0650 | 6.5 | 31 | 70 | 8 |
| D155 0660 | 6.6 | 31 | 70 | 8 |
| D155 0670 | 6.7 | 31 | 70 | 8 |
| D155 0680 | 6.8 | 34 | 74 | 8 |
| D155 0690 | 6.9 | 34 | 74 | 8 |
| D155 0700 | 7 | 34 | 74 | 8 |
| D155 0710 | 7.1 | 34 | 74 | 8 |
| D155 0720 | 7.2 | 34 | 74 | 8 |
| D155 0730 | 7.3 | 34 | 74 | 8 |
| D155 0740 | 7.4 | 34 | 74 | 8 |
| D155 0750 | 7.5 | 34 | 74 | 8 |
| D155 0760 | 7.6 | 37 | 79 | 8 |
| D155 0770 | 7.7 | 37 | 79 | 8 |
| D155 0780 | 7.8 | 37 | 79 | 8 |
| D155 0790 | 7.9 | 37 | 79 | 8 |
| D155 0800 | 8 | 37 | 79 | 8 |
| D155 0810 | 8.1 | 37 | 79 | 10 |
| D155 0820 | 8.2 | 37 | 79 | 10 |
| D155 0830 | 8.3 | 37 | 79 | 10 |
| D155 0840 | 8.4 | 37 | 79 | 10 |
| D155 0850 | 8.5 | 37 | 79 | 10 |
| D155 0860 | 8.6 | 40 | 84 | 10 |
| D155 0870 | 8.7 | 40 | 84 | 10 |
| D155 0880 | 8.8 | 40 | 84 | 10 |
| D155 0890 | 8.9 | 40 | 84 | 10 |
| D155 0900 | 9 | 40 | 84 | 10 |
| D155 0910 | 9.1 | 40 | 84 | 10 |
| D155 0920 | 9.2 | 40 | 84 | 10 |
| D155 0930 | 9.3 | 40 | 84 | 10 |
| D155 0940 | 9.4 | 40 | 84 | 10 |
| D155 0950 | 9.5 | 40 | 84 | 10 |
| D155 0960 | 9.6 | 43 | 89 | 10 |
| D155 0970 | 9.7 | 43 | 89 | 10 |
| D155 0980 | 9.8 | 43 | 89 | 10 |
| D155 0990 | 9.9 | 43 | 89 | 10 |
| D155 1000 | 10 | 43 | 89 | 10 |
| D155 1010 | 10.1 | 43 | 89 | 10 |
| D155 1020 | 10.2 | 43 | 89 | 10 |
| D155 1030 | 10.3 | 43 | 89 | 10 |
| D155 1040 | 10.4 | 43 | 89 | 10 |
| D155 1050 | 10.5 | 43 | 89 | 10 |
| D155 1060 | 10.6 | 47 | 95 | 12 |
| D155 1070 | 10.7 | 47 | 95 | 12 |
| D155 1080 | 10.8 | 47 | 95 | 12 |
| D155 1090 | 10.9 | 47 | 95 | 12 |
| D155 1100 | 11 | 47 | 95 | 12 |
| D155 1110 | 11.1 | 47 | 95 | 12 |
| D155 1120 | 11.2 | 47 | 95 | 12 |
| D155 1130 | 11.3 | 47 | 95 | 12 |
| D155 1140 | 11.4 | 47 | 95 | 12 |
| D155 1150 | 11.5 | 47 | 95 | 12 |
| D155 1160 | 11.6 | 47 | 95 | 12 |
| D155 1170 | 11.7 | 47 | 95 | 12 |
| D155 1180 | 11.8 | 47 | 95 | 12 |
| D155 1190 | 11.9 | 51 | 102 | 12 |
| D155 1200 | 12 | 51 | 102 | 12 |
| D155 1210 | 12.1 | 51 | 102 | 12 |
| D155 1220 | 12.2 | 51 | 102 | 12 |
| D155 1230 | 12.3 | 51 | 102 | 12 |
| D155 1240 | 12.4 | 51 | 102 | 12 |
| D155 1250 | 12.5 | 51 | 102 | 12 |
| D155 1260 | 12.6 | 51 | 102 | 12 |
| D155 1270 | 12.7 | 51 | 102 | 12 |
| D155 1280 | 12.8 | 51 | 102 | 12 |
| D155 1290 | 12.9 | 51 | 102 | 12 |
| D155 1300 | 13 | 51 | 102 | 12 |
| D155 1350 | 13.5 | 54 | 107 | 16 |
| D155 1400 | 14 | 54 | 107 | 16 |
| D155 1450 | 14.5 | 56 | 111 | 16 |
| D155 1500 | 15 | 56 | 111 | 16 |
| D155 1550 | 15.5 | 58 | 115 | 16 |
| D155 1600 | 16 | 58 | 115 | 16 |
| D155 1650 | 16.5 | 60 | 119 | 20 |
| D155 1700 | 17 | 60 | 119 | 20 |
| D155 1750 | 17.5 | 62 | 123 | 20 |
| D155 1800 | 18 | 62 | 123 | 20 |
| D155 1850 | 18.5 | 64 | 127 | 20 |
| D155 1900 | 19 | 64 | 127 | 20 |
| D155 1950 | 19.5 | 66 | 131 | 20 |
| D155 2000 | 20 | 66 | 131 | 20 |
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, use a spot drill before drilling the hole; the Sutton D175 and D176 spotting drills are made for this.
- 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 size table gives the drill diameter (d1) tolerance as m7 and the shank tolerance as h7.
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 | D155 (R40 UNI SPM Stub Drill) |
| Material | Powder metallurgy high speed steel, 11% cobalt (SPM) |
| Finish | Titanium aluminium nitride (TiAlN) |
| Flute geometry | 40° right-hand helix (R40) |
| Point | 130° 4 facet Form B point |
| Shank | Endmill shank, d2 to h7 |
| Standard | approx. DIN 1897 |
| Drill diameter tolerance (d1) | m7 |
| Shank tolerance | h7 |
| Designation | UNI |
| Drilling depth | up to 3 × Ø |
| Sizes in this range | 135 sizes, 1-20mm |
Related drilling products
Compare other Sutton drills: D151 CNC stub, D177 DXS stub, D153 Black Magic stub and D168 R40 UNI SPM jobber. Browse all Stub 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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12.9mm drill bit
Model Number: D1551290
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13mm drill bit
Model Number: D1551300
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13.5mm drill bit
Model Number: D1551350
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14mm drill bit
Model Number: D1551400
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14.5mm drill bit
Model Number: D1551450
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15mm drill bit
Model Number: D1551500
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15.5mm drill bit
Model Number: D1551550
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16mm drill bit
Model Number: D1551600
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16.5mm drill bit
Model Number: D1551650
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17mm drill bit
Model Number: D1551700
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17.5mm drill bit
Model Number: D1551750
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18mm drill bit
Model Number: D1551800
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18.5mm drill bit
Model Number: D1551850
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19mm drill bit
Model Number: D1551900
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19.5mm drill bit
Model Number: D1551950
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20mm drill bit
Model Number: D1552000
