Sutton 3mm DXJ Jobber Drill Bit - Metric - Cobalt TiAlN
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The Sutton D165 DXJ is a jobber drill in 5% cobalt high speed steel (HSS-Co) with a TiAlN coating. It has 35° right-hand helix flutes (R35), a 130° Form A point and a straight shank, d1 to h8. It is made to DIN 338.
High performance drill; suitable for materials up to 850 N/mm²; special point geometry with radius cutting lips; produces short chips; TiAlN for longer tool life.
This is the metric range: 85 sizes from 3 to 13 mm, with flute lengths of 33 to 101 mm and overall lengths of 61 to 151 mm.
Where this product is used
- Materials up to 850 N/mm² where short chips are wanted, the range this drill is made for (special point with radius cutting lips).
- Materials rated Optimal for this drill: wrought aluminium and magnesium alloys; and cast aluminium and magnesium alloys (up to 12% Si).
- Also rated Effective: high-alloy and tool steels; austenitic stainless steel; duplex stainless steel; aluminium and magnesium cast alloys over 12% Si; and thermosetting and fibre-reinforced plastics.
- Rated Optimal for some grades and Effective for others: non-alloy steels; low-alloy 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 | 29 | 4 | 1,540 rpm / 0.1 mm/rev | 925 rpm / 0.16 mm/rev |
| Non-alloy steel, about 0.45 %C, annealed (190 HB) | Optimal | 25 | 4 | 1,330 rpm / 0.1 mm/rev | 795 rpm / 0.16 mm/rev |
| Non-alloy steel, about 0.45 %C, quenched and tempered (250 HB) | Optimal | 25 | 4 | 1,330 rpm / 0.1 mm/rev | 795 rpm / 0.16 mm/rev |
| Non-alloy steel, about 0.75 %C, annealed (270 HB) | Optimal | 25 | 4 | 1,330 rpm / 0.1 mm/rev | 795 rpm / 0.16 mm/rev |
| Non-alloy steel, about 0.75 %C, quenched and tempered (300 HB) | Effective | 10 | 4 | 530 rpm / 0.1 mm/rev | 320 rpm / 0.16 mm/rev |
| Low-alloy and cast steel (under 5% alloying), annealed (180 HB) | Optimal | 25 | 4 | 1,330 rpm / 0.1 mm/rev | 795 rpm / 0.16 mm/rev |
| Low-alloy steel, quenched and tempered (275 HB) | Effective | 20 | 4 | 1,060 rpm / 0.1 mm/rev | 635 rpm / 0.16 mm/rev |
| Low-alloy steel, quenched and tempered (300 HB) | Effective | 10 | 4 | 530 rpm / 0.1 mm/rev | 320 rpm / 0.16 mm/rev |
| High-alloy, cast and tool steel, annealed (200 HB) | Effective | 10 | 4 | 530 rpm / 0.1 mm/rev | 320 rpm / 0.16 mm/rev |
| Austenitic stainless steel, age hardened (180 HB) | Effective | 12 | 3 | 635 rpm / 0.08 mm/rev | 380 rpm / 0.12 mm/rev |
| Duplex stainless steel (250 HB) | Effective | 10 | 4 | 530 rpm / 0.1 mm/rev | 320 rpm / 0.16 mm/rev |
| Wrought aluminium and magnesium alloy, non heat treatable (60 HB) | Optimal | 48 | 6 | 2,550 rpm / 0.16 mm/rev | 1,530 rpm / 0.24 mm/rev |
| Wrought aluminium and magnesium alloy, heat treatable (100 HB) | Optimal | 48 | 6 | 2,550 rpm / 0.16 mm/rev | 1,530 rpm / 0.24 mm/rev |
| Cast aluminium and magnesium alloy (up to 12% Si), non heat treatable (75 HB) | Optimal | 32 | 5 | 1,700 rpm / 0.12 mm/rev | 1,020 rpm / 0.19 mm/rev |
| Cast aluminium and magnesium alloy (up to 12% Si), heat treatable (90 HB) | Optimal | 32 | 5 | 1,700 rpm / 0.12 mm/rev | 1,020 rpm / 0.19 mm/rev |
| Aluminium and magnesium cast alloy over 12% Si (130 HB) | Effective | 25 | 7 | 1,330 rpm / 0.19 mm/rev | 795 rpm / 0.3 mm/rev |
| Copper alloys, free cutting, Pb over 1% (110 HB) | Optimal | 48 | 5 | 2,550 rpm / 0.12 mm/rev | 1,530 rpm / 0.19 mm/rev |
| Brass (CuZn, CuSnZn) (90 HB) | Effective | 32 | 5 | 1,700 rpm / 0.12 mm/rev | 1,020 rpm / 0.19 mm/rev |
| Bronze (CuSn) (100 HB) | Optimal | 40 | 5 | 2,120 rpm / 0.12 mm/rev | 1,270 rpm / 0.19 mm/rev |
| Thermosetting and fibre-reinforced plastics | Effective | 60 | 5 | 3,180 rpm / 0.12 mm/rev | 1,910 rpm / 0.19 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 | D165 |
| Range | DXJ Cobalt Jobber Drill |
| Material | High Speed Steel Cobalt (HSS Co, 5% cobalt) |
| Finish | Titanium aluminium nitride (TiAlN) |
| Flute geometry | 35° right-hand helix (R35) |
| Point | 130° Form A |
| Shank | Straight shank, d1 to h8 |
| Standard | DIN 338 |
| Drill diameter tolerance (d1) | h8 |
| Designation | WN |
| Drilling depth | up to 5 × Ø |
| Sizes in this range | 85 sizes, 3-13mm |
Related drilling products
Compare other Sutton drills: D163 DHJ, D168 R40 UNI, D169 Black Magic and D182 R40 UNI-IK. 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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