Typical hole quality characteristics


1. in 42CrMo4V, Ø 14.5 mm




2. in GGG40, Ø 10,0 mm




The overall total of the maximum positive and negative deviations is the sum of the total run-out in relation to the black circle as measured on standard instruments (dRmax). The red lines at the hole centres indicate the direction and amplitude of the displacements AV (Axis Shifting) of the produced hole from the true centre point. The parameter showing the largest deviation is decisive for the IT quality class of the hole in relation to the tool diameter. The black circle in the diagram represents the nominal hole diameter which the tool should ideally produce.
The red circle indicates the form actually produced. The mean value of the radius of the red circle, i.e. the average diameter, is shown by the blue circle. (with our 60.6003 drills the average diameter is practically identical to the actual diameter produced).

 
                                         
TALADROS PREVIOS PARA ROSCADO / PREVIOUS DRILLING FOR THREADING    
   
                                         
ISO M Paso mm Broca Ø   ISO M Paso mm Broca Ø   ISO MF Paso mm Broca Ø   ISO MF Paso mm Broca Ø   ISO MF Paso mm Broca Ø    
1.6 0,35 1,25   16 2,0 14,0   4,5 0,50 4,0   15 1,00 14,0   25 2,00 23,0    
1.7 0,35 1,30   18 2,5 15,5   5,0 0,50 4,5   15 1,50 13,5   27 1,00 26,0    
1.8 0,35 1,45   20 2,5 17,5   5,5 0,50 5,0   16 1,00 15,0   27 1,50 25,5    
2,0 0,40 1,60   22 2,5 19,5   6,0 0,75 5,2   16 1,50 14,5   27 2,00 25,0    
2.2 0,45 1,75   24 3,0 21,0   7,0 0,75 6,2   17 1,00 16,0   28 1,00 27,0    
2.3 0,40 1,90   27 3,0 24,0   8,0 0,75 7,2   17 1,50 15,5   28 1,50 26,5    
2.5 0,45 2,05   30 3,5 26,5   8,0 1,00 7,0   18 1,00 17,0   28 2,00 26,0    
2.6 0,45 2,10   33 3,5 29,5   9,0 0,75 8,2   18 1,50 16,5   30 1,00 29,0    
3,0 0,50 2,50   36 4,0 32,0   9,0 1,00 8,0   18 2,00 16,0   30 1,50 28,5    
3.5 0,60 2,90   39 4,0 35,0   10 0,75 9,2   20 1,00 19,0   30 2,00 28,0    
4,0 0,70 3,30   42 4,5 37,5   10 1,00 9,0   20 1,50 18,5   30 3,00 27,0    
4.5 0,75 3,75   45 4,5 40,5   10 1,25 8,8   20 2,00 18,0   32 1,50 30,5    
5,0 0,80 4,20           11 0,75 10,2   22 1,00 21,0   32 2,00 30,0    
6,0 1,00 5,00           11 1,00 10,0   22 1,50 20,5   33 1,50 31,5    
7,0 1,00 6,00   ISO MF Paso mm Broca Ø   12 1,00 11,0   22 2,00 20,0   33 2,00 31,0    
8,0 1,25 6,80     12 1,25 10,8   24 1,00 23,0   33 3,00 30,0    
9,0 1,25 7,80   2,5 0,35 2,2   12 1,50 10,5   24 1,50 22,5   35 1,50 33,5    
10 1,50 8,50   3,0 0,35 2,65   14 1,00 13,0   24 2,00 22,0   36 1,50 34,5    
12 1,75 10,20   3,5 0,35 3,15   14 1,25 12,8   25 1,00 24,0   36 2,00 34,0    
14 2,00 12,00   4,0 0,50 3,5   14 1,50 12,5   25 1,50 23,5   36 3,00 33,0    
                                         
                                         
                                         
UNC Paso mm Broca Ø   UNF Paso mm Broca Ø   GAS Paso mm Broca Ø   W BSW Paso mm Broca Ø            
2 56 1,80   2 64 1,80   1/8" 28 8,70   1/8" 40 2,50            
3 48 2,00   3 56 2,10   1/4" 19 11,60   3/16" 24 3,60            
4 40 2,30   4 48 2,40   3/8" 19 15,25   1/4" 20 5,10            
5 40 2,60   5 44 2,60   1/2" 14 19,00   5/16" 18 6,50            
6 32 2,70   6 40 2,90   5/8" 14 20,75   3/8" 16 7,90            
8 32 3,50   8 36 3,50   3/4" 14 24,25   7/16" 14 9,20            
10 24 3,80   10 32 4,00   7/8" 14 28,25   1/2" 12 10,50            
12 24 4,50   12 28 4,60   1" 11 30,50   5/8" 11 13,50            
1/4" 20 5,10   1/4" 28 5,40   1 · 1/8" 11 35,50   3/4" 10 16,25            
5/16" 18 6,50   5/16" 24 6,90   1 · 1/2" 11 45,00   7/8" 9 19,25            
3/8" 16 7,90   3/8" 24 8,40   1 · 3/4" 11 51,00   1" 8 22,00            
7/16" 14 9,30   7/16" 20 9,90   2" 11 57,00   1 · 1/8" 7 24,50            
1/2" 13 10,70   1/2" 20 11,50   2 · 1/4" 11 63,00   1 · 1/4" 7 27,75            
9/16" 12 12,30   9/16" 18 13,00   2 · 1/2" 11 72,50   1 · 3/8" 6 30,50            
5/8" 11 13,50   5/8" 18 14,50   2 · 3/4" 11 79,00   1 · 1/2" 6 33,50            
3/4" 10 16,50   3/4" 16 17,40   3" 11 85,50   1 · 5/8" 5 35,50            
7/8" 9 19,30   7/8" 14 20,40   3 · 1/4" 11 91,50   1 · 3/4" 5 38,50            
1" 8 22,25   1" 12 23,25   3 · 1/2" 11 91,75   1 · 7/8" 4,5 41,25            
                                         
                                         
                                         
                                         
                                         
                                         
                                         
                                         
                                         
                                         
PREVIOUS DRILLING FOR REAMING - TALADRADO PREVIO PARA ESCARIADO
Material Ø up to 6 mm
Ø hasta 6 mm
Ø up to 10 mm
Ø hasta 10 mm
Ø up to 16 mm
Ø hasta 16 mm
Ø up to 25 mm
Ø hasta 25 mm
Ø over 25 mm
Ø desde 25 mm
Steels up to 700 N/mm2
Aceros hasta 700 N/mm2
0,1 - 0,2 0.2 0,2 - 0,3 0,3 - 0,4 0.4
Steels 700 - 1000 N/mm2
Aceros 700 - 1000 N/mm2
0,1 - 0,2 0.2 0.2 0.3 0,3 - 0,4
Cast steel
Acero fundido
0,1 - 0,2 0.2 0.2 0,2 - 0,3 0,3 - 0,4
Cast iron GG
Fundición GG
0,1 - 0,2 0.2 0,2 - 0,3 0,3 - 0,4 0,3 - 0,4
Cast iron GGG
Fundición GGG
0,1 - 0,2 0.2 0.3 0,3 - 0,4 0.4
Copper
Cobre
0,1 - 0,2 0,2 - 0,3 0,3 - 0,4 0.4 0,4 - 0,5
Brass - Bronze
Latón - Bronce
0,1 - 0,2 0.2 0,2 - 0,3 0.3 0,3 - 0,4
Light alloys
Aleaciones ligeras
0,1 - 0,2 0,2 - 0,3 0,3 - 0,4 0.4 0,4 - 0,5
Plastics, hard
Duroplásticos
0,1 - 0,2 0.2 0.4 0,4 - 0,5 0.5
Plastics, soft
Termoplásticos
0,1 - 0,2 0.2 0.2 0.3 0,3 - 0,4
           
Stock allowance (recommended values in mm) · Masa a escariar (valores recomendados en mm)
Due to the efficient action of the spiral, the values for quick spiral reamers may be increased by 50 to 100%.
Los valores para los escariadores de gran rendimiento pueden aumentarse de un 50 a un 100%.
HB HV Rockwell ** HS Approx. tensile strength (MPa)*   HB HV Rockwell ** HS Approx. tensile strength (MPa)*
Brinell, 10mm ball, Load 3000kg
Brinell, bola 10mm, carga 3000k
Vickers Shore   Brinell, 10mm ball, Load 3000kg
Brinell, bola 10mm, carga 3000k
Vickers Shore
HRA HRB HRC HRD   HRA HRB HRC HRD
Standard ball
Bola estándar
Tungsten carbide ball
Bola de carburo al tungsteno
A B C D   Standard ball
Bola estándar
Tungsten carbide ball
Bola de carburo al tungsteno
A B C D
Aprox. tracción fuerza (MPa)*   Aprox. tracción fuerza (MPa)*
940 85.6 68.0 76.9 97   429 429 455 73.4 45.7 59.7 61 1510
920 85.3 67.5 76.5 96   415 415 440 72.8 44.5 58.8 59 1460
900 85.0 67.0 76.1 95   401 401 425 72.0 43.1 57.8 58 1390
(767) 880 84.7 66.4 75.7 93   388 388 410 71.4 41.8 56.8 56 1330
(757) 860 84.4 65.9 75.3 92   375 375 396 70.6 40.4 55.7 54 1270
(745) 840 84.1 65.3 74.8 91   363 363 383 70.0 39.1 54.6 52 1220
(733) 820 83.8 64.7 74.3 90   352 352 372 69.3 (110.0) 37.9 53.8 51 1180
(722) 800 83.4 64.0 73.8 88   341 341 360 68.7 (109.0) 36.6 52.8 50 1130
(712)   331 331 350 68.1 (108.5) 35.5 51.9 48 1095
(710) 780 83.0 63.3 73.3 87   321 321 339 67.5 (108.0) 34.3 51.0 47 1060
(698) 760 82.6 62.5 72.6 86   311 311 328 66.9 (107.5) 33.1 50.0 46 1025
(684) 740 82.2 61.8 72.1   302 302 319 66.3 (107.0) 32.1 49.3 45 1005
(682) 737 82.2 61.7 72.0 84   293 293 309 65.7 (106.0) 30.9 48.3 43 970
(670) 720 81.8 61.0 71.5 83   285 285 301 65.3 (105.5) 29.9 47.6 950
(656) 700 81.3 60.1 70.8   277 277 292 64.6 (104.5) 28.8 46.7 41 925
(653) 697 81.2 60.0 70.7 81   269 269 284 64.1 (104.0) 27.6 45.9 40 895
(647) 690 81.1 59.7 70.5   262 262 276 63.6 (103.0) 26.6 45.0 39 875
(638) 680 80.8 59.2 70.1 80   255 255 269 63.0 (102.0) 25.4 44.2 38 850
630 670 80.6 58.8 69.8   248 248 261 62.5 (101.0) 24.2 43.2 37 825
627 667 80.5 58.7 69.7 79   241 241 253 61.8 100.0 22.8 42.0 36 800
677 80.7 59.1 70.0   235 235 247 61.4 99.0 21.7 41.4 35 785
601 640 79.8 57.3 68.7 77   229 229 241 60.8 98.2 20.5 40.5 34 765
640 79.8 57.3 68.7   223 223 234 97.3 (18.8)
578 615 79.1 56.0 67.7 75   217 217 228 96.4 (17.5) 33 725
607 78.8 55.6 67.4   212 212 222 95.5 (16.0) 705
555 591 78.4 54.7 66.7 73 2055   207 207 218 94.6 (15.2) 32 690
579 78.0 54.0 66.1 2015   201 201 212 93.8 (13.8) 31 675
534 569 77.8 53.5 65.8 71 1985   197 197 207 92.8 (12.7) 30 655
553 77.1 52.5 65.0 1915   192 192 202 91.9 (11.5) 29 640
514 547 76.9 52.1 64.7 70 1890   187 187 196 90.7 (10.0) 620
(495) 539 76.7 51.6 64.3 1855   183 183 192 90.0 (9.0) 28 615
530 76.4 51.1 63.9 1825   179 179 188 89.0 (8.0) 27 600
495 528 76.3 51.0 63.8 68 1820   174 174 182 87.8 (6.4) 585
(477) 516 75.9 50.3 63.2 1780   170 170 178 86.8 (5.4) 26 570
508 75.6 49.6 62.7 1740   167 167 175 86.0 (4.4) 560
477 508 75.6 49.6 62.7 66 1740   163 163 171 85.0 (3.3) 25 545
(461) 495 75.1 48.8 61.9 1680   156 156 163 82.9 (0.9) 525
491 74.9 48.5 61.7 1670   149 149 156 80.8 23 505
461 491 74.9 48.5 61.7 65 1670   143 143 150 78.7 22 490
444 474 74.3 47.2 61.0 1595   137 137 143 76.4 21 460
472 74.2 47.1 60.8 1585   131 131 137 74.0 450
444 472 74.2 47.1 60.8 63 1585   126 126 132 72.0 20 435
                    121 121 127 69.8 19 415
                    116 116 122 67.6 18 400
                    111 111 117 65.7 15 385
                                     
* 1 MPa = 1 N/mm2
** Figures in ( ) are not commonly used. It’s just reference.
Las figuras de ( ) no suelen emplearse. Se usan solo como referencia.
  A: Scale, Load 60kg, Brale Diamond · Escala, Carga 60kg, Diamante Brale
B: Scale, Load 100kg, Diameter 1·16 in. Steel ball · Escala, Carga 100kg, Diámetro 1·16 in. Bola de acero
C: Scale, Load 150kg, brale diamond · Escala, Carga 150kg, Diamante Brale
D: Scale, Load 100kg, Brale Diamond · Escala, Carga 100kg, Diamante Brale
Basic size step
Paso Básico
tamaño (mm)
Tolerance zone class of shaft · Zona de tolerancia clase de eje (µm)  
> e9 f6 f7 f8 g5 g6 h5 h6 h7 h8 h9 js5 js6 js7 k5 k6  
- 3 −14
−39
−6
−12
−6
−16
−6
−20
−2
−6
−2
−8
0
−4
0
−6
0
−10
0
−14
0
−25
±2 ±3 ±5 +4
0
+6
0
 
3 6 −20
−50
−10
−18
−10
−22
−10
−28
−4
−9
−4
−12
0
−5
0
−8
0
−12
0
−18
0
−30
±2.5 ±4 ±6 +6
+1
+9
+1
 
6 10 −25
−61
−13
−22
−13
−28
−13
−35
−5
−11
−5
−14
0
−6
0
−9
0
−15
0
−22
0
−36
±3 ±4.5 ±7 +7
+1
+10
+1
 
10 14 −32
−75
−16
−27
−16
−34
−16
−43
−6
−14
−6
−17
0
−8
0
−11
0
−18
0
−27
0
−43
±4 ±5.5 ±9 +9
+1
+12
+1
 
14 18  
18 24 −40
−92
−20
−33
−20
−41
−20
−53
−7
−16
−7
−20
0
−9
0
−13
0
−21
0
−33
0
−52
±4.5 ±6.5 ±10 +11
+2
+15
+2
 
24 30  
30 40 −50
−112
−25
−41
−25
−50
−25
−64
−9
−20
−9
−25
0
−11
0
−16
0
−25
0
−39
0
−62
±5.5 ±8 ±12 +13
+2
+18
+2
 
40 50  
50 65 −60
−134
−30
−49
−30
−60
−30
−76
−10
−23
−10
−29
0
−13
0
−19
0
−30
0
−46
0
−74
±6.5 ±9.5 ±15 +15
+2
+21
+2
 
65 80  
80 100 −72
−159
−36
−58
−36
−71
−36
−90
−12
−27
−12
−34
0
−15
0
−22
0
−35
0
−54
0
−87
±7.5 ±11 ±17 +18
+3
+25
+3
 
100 120  
                           
       
                                     
Basic size step
Paso Básico
tamaño (mm)
Tolerance zone class of hole · Zona de tolerancia clase de agujero (µm)
> E7 E8 E9 F6 F7 F8 G6 G7 H6 H7 H8 H9 H10 JS6 JS7 K6 K7
- 3 +24
+14
+28
+14
+39
+14
+12
+6
+16
+6
+20
+6
+8
+2
+12
+2
+6
0
+10
0
+14
0
+25
0
+40
0
±3 ±5 0
−6
0
−10
3 6 +32
+20
+38
+20
+50
+20
+18
+10
+22
+10
+28
+10
+12
+4
+16
+4
+8
0
+12
0
+18
0
+30
0
+48
0
±4 ±6 +2
−6
+3
−9
6 10 +40
+25
+47
+25
+61
+25
+22
+13
+28
+13
+35
+13
+14
+5
+20
+5
+9
0
+15
0
+22
0
+36
0
+58
0
±4.5 ±7 +2
−7
+5
−10
10 14 +50
+32
+59
+32
+75
+32
+27
+16
+34
+16
+43
+16
+17
+6
+24
+6
+11
0
+18
0
+27
0
+43
0
+70
0
±5.5 ±9 +2
−9
+6
−12
14 18
18 24 +61
+40
+73
+40
+92
+40
+33
+20
+41
+20
+53
+20
+20
+7
+28
+7
+13
0
+21
0
+33
0
+52
0
+84
0
±6.5 ±10 +2
−11
+6
−15
24 30
30 40 +75
+50
+89
+50
+112
+50
+41
+25
+50
+25
+64
+25
+25
+9
+34
+9
+16
0
+25
0
+39
0
+62
0
+100
0
±8 ±12 +3
−13
+7
−18
40 50
50 65 +90
+60
+106
+60
+134
+60
+49
+30
+60
+30
+76
+30
+29
+10
+40
+10
+19
0
+30
0
+46
0
+74
0
+120
0
±9.5 ±15 +4
−15
+9
−21
65 80
80 100 +107
+72
+126
+72
+159
+72
+58
+36
+71
+36
+90
+36
+34
+12
+47
+12
+22
0
+35
0
+54
0
+87
0
+140
0
±11 ±17 +4
−18
+10
−25
100 120
                                     
In every step given in the table, the value on the upper side shows the upper deviation and the value on the lower side, the lower deviation.
Para cada paso de la tabla, el valor del lado superior muestra la desviación del lado superior y el valor del lado inferior, la desviación inferior
Coventry line
  COVENTRY TOOLS BITS CARBIDE BRAZED TURNING TOOLS
Co 10% SPEZIAL ASP-60 P-20 P-40 K-10 M-10
MATERIAL MANUFACTURING High speed steel 10% Cobalt alloy. First choice quality. High-speed steel cobalt alloy, Tungsten and Carbon High alloy ASP-60 powder metallurgical grade with a more even distribution of cobalt, tungsten and Carbide particles.. Premium carbide imported from Germany and under ISO.
APPLICATIONS Turning, grooving and parting off. General purpose cutting tools. High feed turning. Means cutting depths. High wear resistance cutting edge. Turning and parting off. Turning, grooving, threading. Generalmachining. Turning, grooving, high feed ordificult conditions. Turning, grooving, threading. Generalmachining. Turning, grooving, threading. Generalmachining.
MACHINING Tough materials Wood
Extrusion Shearing tools
Tough materials Wood
Extrusion Shearing tools
Carbon steel, stainless steel,aluminium alloys, heat resistant alloys. First choice grade for general turning steel. Steel machining under difficult conditions.  Aleaciones de cobre a alta temperatura.
Universal grade for cast iron,
aluminium, abrasive materials and copper alloys.
Turning stainless steels and wear resistants manganese steels.
RESISTANCE Allowed in difficult cutting
conditions.
High wear resistance and machining withhigh concentration of heat. Alta resistencia al desgaste.
Alta resistencia de la arista de corte.
High wear resistance.
High strength cutting edge.
High wear resistance. Allowed in difficult cutting
conditions.
High wear resistance. High wear resistance.
REGRINDING Regrinding easily with ceramic or CBN wheels. Regrinding easily with ceramic or CBN wheels. Regrinding easily with ceramic or CBN wheels. Silicon carbide Wheel, finish withdiamond wheel.
SPECIAL FEATURES Good results in wide materials
range.
Better wear resistance at
cutting edge.

Increased productivity by higher cutting conditions and increased wear resistance.
Optimal performance in machining processes