General Programme 2024

410

CHART FOR METAL TWIST DRILLS

twist drills with cylindrical shanks, short series HSS, rolled

R

Stainless steel

≤1400

R ≤ 650 N/mm² HV ~ 750÷820

HV 920

≤1300

HV 860

Alloy steel NiCrMo

≤1200

L1

118°

Ø

≤1100

Alloy steel NiCr

L

≤1000

DIN 338 ISO 235

HV 850

HV MAX 2500

≤900

HV 820

≤800

Ø mm 0,50 1,00 1,25 1,50 1,75 2,00 2,25 2,50 2,75 3,00 3,20 3,25 3,50 3,75 4,00 4,20 4,25 4,50 4,75 5,00 5,25 5,50 5,75 6,00 6,25 6,50 6,75 7,00 7,50 8,00 8,50 9,00 9,50

L mm

L1 mm

Structural steel

€ 1,66 0,92 0,76 0,71 0,71 0,65 0,76 0,71 0,76 0,71 0,96 0,96 0,90 1,08 0,99 1,24 1,24 1,11 1,28 1,22 1,74 1,63 1,78 1,63 2,12 2,00 2,55 2,36 2,48 2,94 3,10 3,75 4,15 4,55 5,45 6,45 6,70 7,40 8,15 8,60

  10 004100030 10 004100040 10 004100043 10 004100046 10 004100049 10 004100052 10 004100055 10 004100058 10 004100061 10 004100064 10 004100066 10 004100067 10 004100070 10 004100073 10 004100076 10 004100078 10 004100079 10 004100082 10 004100085 10 004100088 10 004100091 10 004100094 10 004100097 10 004100100 10 004100103 10 004100106 10 004100109 10 004100112 10 004100118 10 004100124 10 004100130 5 004100136 5 004100142 5 004100148 5 004100172 5 004100184 5 004100196 5 004100210 5 004100222 5 004100234 5 004100242 5 004100250 5 004100258 3 004100262 3 004100266 3 004100270 3 004100274

22

6

HV 750

≤700

34 12 38 16 40 18 46 22 49 24 53 27 57 30 61 33 61 33 65 36 65 36 70 39 70 39 75 43 75 43 75 43 80 47 80 47 86 52 86 52 93 57 93 57 93 57 101 63 101 63 109 69 109 69 109 69 117 75 117 75 125 81 125 81 133 87 133 87 142 94 142 94 151 101 151 101 151 101 160 108 169 114 178 120 184 125 191 130 198 135 205 140

≤600

N/mm 2

Normal steel

410

412

414

416

415

415CO

R N/mm 2 – Mechanical resistance of the material to drill. HV – Twist drill hardness according to the Vickers scale: the higher the value, the higher the hardness of the material. GUIDE TO TWIST DRILLS WITH CYLINDRICAL SHANKS Rolled twist drills – Twist drills obtained from a hot-rolling manufacturing process. Good-quality twist drills, for use for light-duty jobs, e.g. drilling of iron, mild steel, light alloys and nonferrous metals in general. Ground twist drills – Twist drills obtained entirely from grounding from a heat-treated steel bar. High-performance twist drills, for drilling steel and light alloys: constant efficiency, excellent chip removal and drilling precision. HSS – High-speed steel, extremely hard, and resistant to high temperatures; the best material for cutting, tapping and threading tools. Cobalt (Co) – A base alloy element, providing steel with improved heat resistance, and decreasing twist drill wear, e.g. at high temperatures. The higher the cobalt content, the better the performance of the tool. The most commonly used alloys have a 5% or 8% cobalt content. HSS-Co – High-speed steel with a 5% or 8% cobalt content. TiN – Ultrathin titanium nitride coating; based on its high hardness and low friction factor, it provides increased resistance to wear and oxidation and improved drilling chip removal. Chrome steel – Tools made from chrome steel are suitable for manual use for threading of iron, light alloys, untreated steel and steel heat-treated at low hardness. They are widely used for cleaning and repairing damaged threads in all professional jobs in general, and in the automotive sector in particular. Hard metal – Material with high wear resistance, used for plates in masonry drill bits. 118° sharpening – Standard sharpening angle of twist drills for metal, allowing quick drilling into metals, for easier centring and excellent heat dissipation. 130° sharpening – Wide sharpening angle, providing more precision in early drilling operations and requiring less drilling force. Double 115°/135° sharpening – Combined benefits of the two angles, plus chip breaking function; the best choice for long chip materials.

10,00 10,50 11,00 11,50 12,00 12,50 13,00 14,00 15,00 16,00 17,00 18,00 19,00 20,00

11,40 13,30 16,60 18,30 21,70 24,60 29,50

€ 47,50 26,50 100,00 36,50

 

410/SP19

1 004100419

Ø 1÷10 x 0,5 mm

410/SPVP1

1 004100421 1 004100425

SDS-Plus – Quick, safe tang for hammer drills.

Ø 1÷13 x 0,5 mm 410/SP25

410/SPVP2

1 004100427

36

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