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Curved Hole Data - KIK Spade Bit
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Boring a curved hole with the KIK® Spade Bits is easy. Simply start straight on the work piece and just after penetration begin to lean the drill over pointing it in the direction you wish to curve. Continue feeding the drill until it begins to exit the work piece. Use gentle pressure while finishing the exit hole to reduce tear-out.


The following tables provide precise information for producing curved holes. Both minimum and maximum values are given assuming the drill bit is secured 1" into the drill chuck. Any combination within these ranges can be used. Shown in the diagram at right:

"A" is the center of the bit where the hole is started.
"B" refers to the center of the exit hole.
"C" indicates the measurement to the top of the exit hole.



KIK® Spade Bit Curved Hole Data

Starts Length Diameter: 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16 1" 1-1/8 1-1/4 1-3/8 1-1/2
A-0.5" Any B-Min.
C-Min Edge
1.417
0.955
0.922
0.545
0.773
0.396
0.703
0.307
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
6" B-Max
C-Max Edge
3.799
2.640
3.680
2.407
3.579
2.210
3.492
2.040
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
8" B-Max
C-Max Edge
5.348
3.727
5.185
3.404
5.047
3.131
4.929
2.897
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
13" B-Max
C-Max Edge
9.203
6.424
8.928
5.875
8.696
5.412
8.496
5.016
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
A-0.75" Any B-Min.
C-Min Edge
2.112
1.650
1.358
0.981
1.125
0.747
1.010
0.614
0.945
0.523
0.905
0.455
0.880
0.399
0.865
0.351
0.857
0.310
0.853
0.273
0.853
0.239
0.856
0.207
--
--
--
--
--
--
--
--
6" B-Max
C-Max Edge
4.072
3.227
3.961
3.010
3.862
2.818
3.774
2.647
3.693
2.492
3.620
2.352
3.554
2.224
3.492
2.107
3.435
1.998
3.382
1.898
3.332
1.804
3.286
1.717
--
--
--
--
--
--
--
--
8" B-Max
C-Max Edge
5.758
4.575
5.607
4.277
5.473
4.013
5.354
3.778
5.246
3.567
5.149
3.377
5.061
3.204
4.980
3.046
4.805
2.901
4.836
2.768
4.773
2.644
4.713
2.529
--
--
--
--
--
--
--
--
13" B-Max
C-Max Edge
9.938
7.910
9.684
7.404
9.460
6.958
9.260
6.562
9.082
6.207
8.921
5.888
8.775
5.598
8.642
5.335
8.521
5.095
8.409
4.874
8.306
4.670
8.211
4.482
--
--
--
--
--
--
--
--
A-1" Any B-Min.
C-Min Edge
2.807
2.345
1.794
1.417
1.476
1.099
1.318
0.922
1.244
0.803
1.165
0.714
1.126
0.644
1.099
0.586
1.082
0.535
1.071
0.491
1.066
0.451
1.063
0.414
1.067
0.348
1.078
0.289
1.094
0.235
1.114
0.184
6" B-Max
C-Max Edge
4.199
3.534
4.098
3.340
4.007
3.163
3.922
3.002
3.844
2.853
3.772
2.715
3.704
2.588
3.641
2.469
3.582
2.358
3.526
2.253
3.473
2.155
3.422
2.061
3.329
1.889
3.243
1.732
3.163
1.588
3.089
1.454
8" B-Max
C-Max Edge
5.973
5.041
5.837
4.776
5.714
4.535
5.602
4.315
5.498
4.114
5.403
3.928
5.315
3.757
5.233
3.598
5.157
3.451
5.085
3.313
5.018
3.183
4.954
3.062
4.838
2.839
4.733
2.640
4.637
2.459
4.550
2.294
13" B-Max
C-Max Edge
10.348
8.752
10.122
8.303
9.918
7.897
9.732
7.528
9.562
7.191
9.405
6.882
9.262
6.597
9.128
6.333
9.005
6.089
8.890
5.862
8.782
5.650
8.682
5.452
8.499
5.092
8.336
4.772
8.190
4.487
8.058
4.229
A-1.5" Any B-Min.
C-Min Edge
4.196
3.375
2.665
2.288
2.179
1.802
1.932
1.536
1.783
1.361
1.684
1.234
1.616
1.135
1.568
1.054
1.533
0.986
1.508
0.927
1.490
0.875
1.477
0.828
1.464
0.746
1.463
0.674
1.469
0.610
1.481
0.551
6" B-Max
C-Max Edge
4.251
3.784
4.166
3.626
4.086
3.477
4.011
3.337
3.939
3.205
3.871
3.079
3.806
2.960
3.744
2.847
3.685
2.739
3.628
2.636
3.573
2.537
3.520
2.442
3.419
2.263
3.324
2.096
3.234
1.939
3.148
1.790
8" B-Max
C-Max Edge
6.148
5.495
6.038
5.281
5.934
5.082
5.837
4.895
5.745
4.719
5.659
4.554
5.577
4.398
5.499
4.250
5.425
4.110
5.355
3.976
5.287
3.849
5.223
3.828
5.102
3.502
4.990
3.293
4.886
3.100
4.789
2.921
13" B-Max
C-Max Edge
10.765
9.646
10.585
9.290
10.417
8.958
10.260
8.648
10.113
8.358
9.974
8.085
9.844
7.828
9.721
7.587
9.604
7.358
9.494
7.142
9.390
6.937
9.290
6.743
9.105
6.381
8.936
6.053
8.782
5.752
8.639
5.476
A-2" Any B-Min.
C-Min Edge
5.586
5.124
3.537
3.160
2.882
2.505
2.546
2.150
2.341
1.919
2.204
1.753
2.107
1.625
2.036
1.523
1.984
1.437
1.944
1.363
1.914
1.299
1.891
1.242
1.862
1.143
1.848
1.059
1.844
0.985
1.848
0.918
6" B-Max
C-Max Edge
--
--
4.076
3.656
4.004
3.527
3.934
3.402
3.867
3.283
3.803
3.169
3.740
3.058
3.679
2.952
3.620
2.849
3.563
2.750
3.507
2.653
3.452
2.560
3.347
2.380
3.246
2.209
3.149
2.047
3.055
1.890
8" B-Max
C-Max Edge
6.156
5.653
6.062
5.475
5.972
5.305
5.887
5.144
5.804
4.990
5.726
4.842
5.650
4.701
5.578
4.566
5.508
4.436
5.440
3.313
5.375
4.192
5.312
4.076
5.192
3.856
5.079
3.651
4.972
3.458
4.871
3.275
13" B-Max
C-Max Edge
10.942
10.080
10.793
9.787
10.651
9.509
10.517
9.245
10.388
8.995
10.266
8.756
10.150
8.529
10.039
8.312
9.932
8.105
9.830
7.907
9.732
7.717
9.638
7.534
9.461
7.191
9.297
6.874
9.144
6.579
9.000
6.304
A-2.5" Any B-Min.
C-Min Edge
6.975
6.514
4.409
4.032
3.586
3.208
3.161
2.765
2.899
2.478
2.723
2.273
2.598
2.116
2.505
1.991
2.435
1.888
2.380
1.800
2.338
1.724
2.305
1.656
2.260
1.541
2.233
1.444
2.220
1.360
2.215
1.285
6" B-Max
C-Max Edge
3.944
3.651
3.873
3.530
3.804
3.412
3.738
3.298
3.672
3.187
3.609
3.080
3.546
2.975
3.485
2.873
3.426
2.774
3.367
2.677
3.309
2.582
3.253
2.489
3.142
2.309
3.034
2.135
2.929
1.967
2.826
1.803
8" B-Max
C-Max Edge
6.067
5.658
5.984
5.503
5.903
5.354
5.825
5.211
5.749
5.073
5.676
4.940
5.605
4.811
5.537
4.687
5.470
4.566
5.405
4.449
5.342
4.336
5.280
4.336
5.162
4.015
5.049
3.814
4.940
3.624
4.836
3.442
13" B-Max
C-Max Edge
11.001
10.300
10.873
10.050
10.750
9.812
10.632
9.583
10.518
9.363
10.409
9.152
10.304
8.949
10.203
8.754
10.106
8.565
10.011
8.384
9.920
8.209
9.832
8.040
9.665
7.719
9.507
7.418
9.358
7.135
9.218
6.868
A-3" Any B-Min.
C-Min Edge
8.365
7.904
5.281
4.904
4.289
3.911
3.775
3.379
3.458
3.036
3.243
2.792
3.088
2.607
2.973
2.459
2.885
2.338
2.817
2.236
2.763
2.148
2.719
2.070
2.657
1.939
2.618
1.829
2.595
1.735
2.583
1.652
6" B-Max
C-Max Edge
--
--
--
--
--
--
--
--
--
--
3.295
2.841
3.231
2.739
3.167
2.638
3.105
2.539
3.043
2.442
2.981
2.347
2.921
2.252
2.801
2.067
2.682
1.886
2.565
1.709
2.449
1.534
8" B-Max
C-Max Edge
5.903
5.559
5.826
5.420
5.751
5.286
5.678
5.156
5.607
5.029
5.538
4.906
5.470
4.787
5.404
4.670
5.339
4.557
5.276
4.446
5.214
4.338
5.153
4.233
5.035
4.029
4.921
3.833
4.810
3.646
4.703
3.464
13" B-Max
C-Max Edge
10.987
10.396
10.874
10.178
10.764
9.968
10.659
9.765
10.556
9.569
10.457
9.380
10.361
9.196
10.268
9.019
10.178
8.847
10.091
8.680
10.006
8.519
9.923
8.361
9.764
8.061
9.613
7.776
9.469
7.506
9.333
7.250
A-4" Any B-Min.
C-Min Edge
11.144
10.683
7.024
6.647
5.695
5.317
5.004
4.608
4.574
4.153
4.282
3.831
4.070
3.588
3.910
3.396
3.787
3.240
3.689
3.109
3.611
2.996
3.547
2.898
3.453
2.734
3.389
2.600
3.345
2.486
3.317
2.386
8" B-Max
C-Max Edge
--
--
--
--
--
--
5.160
4.756
5.029
4.644
5.025
4.533
4.959
4.242
4.893
4.317
4.829
4.212
4.765
4.108
4.702
4.006
4.640
3.905
4.517
3.708
4.396
3.516
4.278
3.328
3.145
9.339
13" B-Max
C-Max Edge
--
--
10.714
10.183
10.623
10.012
10.534
9.845
10.447
9.682
10.362
9.524
10.278
9.369
10.197
9.218
10.117
9.070
10.039
8.926
9.930
8.785
9.888
8.647
9.743
8.379
9.603
8.123
9.469
7.877
9.339
7.640
A-5" Any B-Min.
C-Min Edge
13.924
13.462
8.768
8.391
7.101
6.724
6.232
5.836
5.691
5.270
5.321
4.870
5.051
4.570
4.847
4.333
4.688
4.141
4.562
3.981
4.459
3.845
4.376
3.726
4.248
3.529
4.159
3.370
4.096
3.236
4.051
3.121
13" B-Max
C-Max Edge
--
--
10.391
9.961
10.310
9.814
10.231
9.670
10.152
9.528
10.076
9.390
10.000
9.254
9.926
9.120
9.853
8.989
9.781
8.860
9.710
8.733
9.640
8.609
9.503
8.365
9.371
8.130
9.241
7.902
9.115
7.681
A-6" Any B-Min.
C-Min Edge
16.703
16.241
10.511
10.134
8.508
8.130
7.461
7.065
6.808
6.386
6.359
5.909
6.033
5.551
5.784
5.270
5.590
5.034
5.434
4.854
5.308
4.693
5.204
4.554
5.044
4.325
4.929
4.140
4.846
3.987
4.785
3.855
13" B-Max
C-Max Edge
--
--
--
--
9.846
9.428
9.772
9.299
9.699
9.172
9.626
9.046
9.555
8.922
9.485
8.800
9.415
8.680
9.346
8.561
9.278
8.444
9.211
8.329
9.079
8.102
8.949
7.881
8.822
7.665
8.697
7.454
A-7" Any B-Min.
C-Min Edge
19.482
19.021
12.255
11.878
9.914
9.536
8.690
8.294
7.925
7.503
7.398
6.948
7.014
6.532
6.721
6.207
6.491
5.944
6.307
5.726
6.156
5.542
6.032
5.383
5.839
5.120
5.700
4.911
5.597
4.737
5.520
4.589
13" B-Max
C-Max Edge
--
--
--
--
--
--
9.154
8.745
9.083
8.627
9.013
8.509
8.943
8.393
8.874
8.279
8.805
8.165
8.737
8.053
8.670
7.941
8.603
7.831
8.470
7.614
8.340
7.401
8.211
7.192
8.084
6.986
A-8" Any B-Min.
C-Min Edge
22.261
21.800
13.998
13.622
11.320
10.943
9.918
9.522
9.041
8.620
8.437
7.987
7.995
7.514
7.658
7.144
7.393
6.846
7.180
6.599
7.050
6.390
6.860
6.211
6.634
5.916
6.470
5.681
6.347
5.487
6.254
5.324
13" B-Max
C-Max Edge
--
--
--
--
--
--
--
--
--
--
--
--
8.141
7.655
8.071
7.544
8.001
7.433
7.931
7.324
7.861
7.215
7.792
7.107
7.655
6.893
7.519
6.681
7.385
6.473
7.251
6.267



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