Multi-Spindle Drill Heads for Drilling and Tapping
U.S. Taper Length Twist Drill Sizes
Size
Diameter
Flute Length inch
Overall Length inch
U.S.
Metric
inch
mm
1.00
0.0394
1.00
1 1/8
2 1/4
60
0.0400
1.016
1 1/8
2 1/4
59
0.0410
1.041
1 1/8
2 1/4
1.05
0.0413
1.050
1 1/8
2 1/4
58
0.0420
1.067
1 1/8
2 1/4
57
0.0430
1.092
1 1/8
2 1/4
1.10
0.0433
1.100
1 1/8
2 1/4
1.15
0.0453
1.150
1 1/8
2 1/4
56
0.0465
1.181
1 1/8
2 1/4
3/64
0.0469
1.191
1 1/8
2 1/4
1.20
0.0472
1.200
1 3/4
3
1.25
0.0492
1.250
1 3/4
3
1.30
0.0512
1.300
1 3/4
3
55
0.0520
1.321
1 3/4
3
1.35
0.0531
1.350
1 3/4
3
54
0.0550
1.397
1 3/4
3
1.40
0.0551
1.400
1 3/4
3
1.45
0.0571
1.450
1 3/4
3
1.50
0.0591
1.500
1 3/4
3
53
0.0595
1.511
1 3/4
3
1.55
0.0610
1.550
1 3/4
3
1/16
0.0625
1.588
1 3/4
3
1.60
0.0630
1.600
2
3 3/4
52
0.0635
1.613
2
3 3/4
1.65
0.0650
1.650
2
3 3/4
1.70
0.0669
1.700
2
3 3/4
51
0.0670
1.702
2
3 3/4
1.75
0.0689
1.750
2
3 3/41
50
0.0700
1.778
2
3 3/4
1.80
0.0709
1.800
2
3 3/4
1.85
0.0728
1.850
2
3 3/4
49
0.0730
1.854
2
3 3/4
1.90
0.0748
1.900
2
3 3/4
48
0.0760
1.930
2
3 3/4
1.95
0.0768
1.950
2
3 3/4
5/64
0.0781
1.984
2
3 3/4
47
0.0785
1.994
2 1/4
4 1/4
2.00
0.0787
2.000
2 1/4
4 1/4
2.05
0.0807
2.050
2 1/4
4 1/4
46
0.0810
2.057
2 1/4
4 1/8
45
0.0820
2.083
2 1/4
4 1/4
2.10
0.0827
2.100
2 1/4
4 1/4
2.15
0.0846
2.150
2 1/4
4 1/4
44
0.0860
2.184
2 1/4
4 1/4
2.20
0.0866
2.200
2 1/4
4 1/4
2.25
0.0886
2.250
2 1/4
4 1/4
43
0.0890
2.261
2 1/4
4 1/4
2.30
0.0906
2.300
2 1/4
4 1/4
2.35
0.0925
2.350
2 1/4
4 1/4
42
0.0935
2.375
2 1/4
4 1/4
3/32
0.0938
2.383
2 1/4
4 1/4
2.40
0.0945
2 1/2
2 3/8
4 5/8
41
0.0960
2.438
2 1/2
4 5/8
2.45
0.0965
2.450
2 1/2
4 5/8
40
0.0980
2.489
2 1/2
4 5/8
2.50
0.0984
2.500
2 1/2
4 5/8
39
0.0995
2.527
2 1/2
4 5/8
38
0.1015
2.578
2 1/2
4 5/8
2.60
0.1024
2.600
2 1/2
4 5/8
37
0.1040
2.642
2 1/2
4 5/8
2.70
0.1063
2.700
2 1/2
4 5/8
36
0.1065
2.705
2 1/2
4 5/8
7/64
0.1094
2.779
2 1/2
4 5/8
35
0.1100
2.794
2 3/4
5 1/8
2.80
0.1102
2.800
2 3/4
5 1/8
34
0.1110
2.819
2 3/4
5 1/8
33
0.1130
2.870
2 3/4
5 1/8
2.90
0.1142
2.900
2 3/4
5 1/8
32
0.1160
2.946
2 3/4
5 1/8
3.00
0.1181
3.000
2 3/4
5 1/8
31
0.1200
3.048
2 3/4
5 1/8
3.10
0.1220
3.100
2 3/4
5 1/8
1/8
0.1250
3.0175
2 3/4
5 1/8
3.20
0.1260
3.200
3
5 3/8
30
0.1285
3.264
3
5 3/8
3.30
0.1299
3.300
3
5 3/8
3.40
0.1339
3.400
3
5 3/8
29
0.1360
3.454
3
5 3/8
3.50
0.1378
3.500
3
5 3/8
28
0.1405
3.569
3
5 3/8
9/64
0.1406
3.571
3
5 3/8
3.60
0.1417
3.600
3
5 3/8
27
0.1440
3.658
3
5 3/8
3.70
0.1457
3.700
3
5 3/8
26
0.1470
3.734
3
5 3/8
25
0.1495
3.797
3
5 3/8
3.80
0.1496
3.800
3
5 3/8
24
0.1520
3.861
3
5 3/8
3.90
0.1535
3.900
3
5 3/8
23
0.1540
3.912
3
5 3/8
5/32
0.1562
3.967
3
5 3/8
22
0.1570
3.988
3 3/8
5 3/4
4.00
0.1575
4.000
3 3/8
5 3/4
21
0.1590
4.039
3 3/8
5 3/4
20
0.1610
4.089
3 3/8
5 3/4
4.10
0.1614
4.100
3 3/8
5 3/4
4.20
0.1654
4.200
3 3/8
5 3/4
19
0.1660
4.216 <
3 3/8
5 3/4
4.30
0.1693
4.300
3 3/8
5 3/4
18
0.1695
4.305
3 3/8
5 3/4
11/64
0.1719
4.366
3 3/8
5 3/4
17
0.1730
4.394
3 3/8
5 3/4
4.40
0.1732
4.400
3 3/8
5 3/4
16
0.1770
4.496
3 3/8
5 3/4
4.50
0.1772
4.500
3 3/8
5 3/4
15
0.1800
4.572
3 3/8
5 3/4
4.60
0.1811
4.600
3 3/8
5 3/4
14
0.1820
4.623
3 3/8
5 3/4
13
4.70
0.1850
4.700
3 3/8
5 3/4
3/16
0.1875
4.762
3 3/8
5 3/4
12
4.80
0.1890
4.800
3 5/8
6
11
0.1910
4.851
3 5/8
6
4.90
0.1929
4.900
3 5/8
6
10
0.1935
4.915
3 5/8
6
9
0.1960
4.978
3 5/8
6
5. 00
0.1969
5.000
3 5/8
6
8
0.1990
5.054
3 5/8
6
5. 10
0.2008
5.100
3 5/8
6
7
0.2010
5.105
3 5/8
6
13/64
0.2031
5.159
3 5/8
6
6
0.2040
5.182
3 5/8
6
5.20
0.2047
5.200
3 5/8
6
5
0.2055
5.220
3 5/8
6
5.30
0.2087
5.300
3 5/8
6
4
0.2090
5.309
3 5/8
6
5.40
0.2126
5.400
3 5/8
6
3
0.2130
5.410
3 5/8
6
5.50
0.2165
5.500
3 5/8
6
7/32
0.2188
5.558
3 5/8
6
5.60
0.2205
5.600
3 3/4
6 1/8
2
0.2210
5.613
3 3/4
6 1/8
5.70
0.2244
5.700
3 3/4
6 1/8
1
0.2280
5.791
3 3/4
6 1/8
5.80
0.2283
5.800
3 3/4
6 1/8
5.90
0.2323
5.600
3 3/4
6 1/8
A
0.2340
5.944
nbsp;
15/64
0.2344
5.954
3 3/4
6 1/8
6.00
0.2362
6.000
3 3/4
6 1/8
B
0.2380
6.045
6.10
0.2402
6.100
3 3/4
6 1/8
C
0.2420
6.147
6.20
0.2441
6.200
3 3/4
6 1/8
D
0.2460
6.248
6.30
0.2480
6.300
3 3/4
6 1/8
E, 1/4
0.2500
6.350
3 3/4
6 1/8
6.40
0.2520
6.400
3 7/8
6 1/4
6.50
0.2559
6.500
3 7/8
6 1/4
F
0.2570
6.528
6.60
0.2598
6.600
G
0.2610
6.629
6.70
0.2638
6.700
17/64
0.2656
6.746
3 7/8
6 1/4
H
0.2660
6.756
6.80
0.2677
6.800
3 7/8
6 1/4
6.90
0.2717
6.900
I
0.2720
6.909
7.00
0.2756
7.000
3 7/8
6 1/4
J
0.2770
7.036
 
7.10
0.2795
7.100
K
0.2810
7.137
9/32
0.2812
7.142
3 7/8
6 1/4
7.20
0.2835
7.200
4
6 3/8
7.30
0.2874
7.300
L
0.2900
7.366
7.40
0.2913
7.400
M
0.2950
7.493
7.50
0.2953
7.500
4
6 3/8
19/64
0.2969
7.541
4
6 3/8
7.60
0.2992
7.600
N
0.3020
7.671
7.70
0.3031
7.700
7.80
0.3071
7.800
4
6 3/8
7.90
0.3110
7.900
5/16
0.3125
7.938
4
6 3/8
8.00
0.3150
8.000
4 1/8
6 1/2
O
0.3160
8.026
8.10
0.3189
8.100
8.20
0.3228
8.200
4 1/8
6 1/2
P
0.3230
8.204
8.30
0.3268
8.300
21/64
0.3281
8.334
4 1/8
6 1/2
8.40
0.3307
8.400
/
Q
0.3320
8.433
8.50
0.3346
8.500
4 1/8
6 1/2
8.60
0.3386
8.600
R
0.3390
8.611
8.70
0.3425
8.700
11/32
0.3438
8.733
4 1/8
6 1/2
8.80
0.3465
8.800
4 1/4
6 3/4
S
0.3480
8.839
8.90
0.3504
8.900
9.00
0.3543
9.000
4 1/4
6 3/4
T
0.3580
9.093
9.10
0.3583
9.100
23/64
0.3594
9.129
4 1/4
6 3/4
9.20
0.3622
9.200
4 1/4
6 3/4
9.30
0.3661
9.300
U
0.3680
9.347
9.40
0.3701
9.400
9.50
0.3740
9.500
4 1/4
6 3/4
3/8
0.3750
9.525
4 1/4
6 3/4
V
0.3770
9.576
9.60
0.3780
9.600
9.70
0.3819
9.700
9.80
0.3858
9.800
4 3/8
7
W
0.3860
9.804
9.90
0.3898
9.900
25/64
0.3906
9.921
4 3/8
7
10.00
0.3937
10.00
4 3/8
7
X
0.3970
10.084
10.20
0.4016
10.200
4 3/8
7
Y
0.4040
10.262
13/32
0.4062
10.317
4 3/8
7
Z
0.4130
10.490
10.50
0.4134
10.500
4 5/8
7 1/4
27/64
0.4219
10.716
4 5/8
7 1/4
10.80
0.4252
10.800
4 5/8
7 1/4
11.00
0.4331
11.000
4 5/8
7 1/4
7/16
0.4375
11.112
4 5/8
7 1/4
11.20
0.4409
11.200
4 3/4
7 1/2
11.50
0.4528
11.500
4 3/4
7 1/2
29/64
0.4531
11.509
4 3/4
7 1/2
11.80
0.4646
11.800
4 3/4
7 1/2
15/32
0.4688
11.908
4 3/4
7 1/2
12.00
0.4724
12.000
4 3/4
7 3/4
12.20
0.4803
12.200
4 3/4
7 3/4
31/64
0.4844
12.304
4 3/4
7 3/4
12.50
0.4921
12.500
4 3/4
7 3/4
1/2
0.500
12.700
4 3/4
7 3/4
Multi-Drill Home Page
AutoDrill can provide replacement drilling heads for Commander, Johnson, Ettco, Centerline Centroid and many more. Our prices make rebuilding Commander, Johnson, Ettco, Centerline Centroid and many other brand multiple spindle heads uneconomical. When you need a replacement head for Commander, Johnson, Ettco or Centerline Centroid multi-spindle drill or tapping heads call AutoDrill.
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