Nanjing Makas Carbide Knives Co.,Ltd. produce Carbide Gun Drill Blanks, Cemented Carbide Gun Drill Blanks,
Blanks for gun drills, Profile rods and tips with special coolant hole profiles for manufacturing deep-hole
drilling tools, tungsten solid carbide gun drill blanks.
Gun drilling, invented in Europe more than two centuries ago, is the process of drilling deep, straight
holes in a variety of metal alloys. It was first invented in order to make long, straight gun barrels,
hence the name gun drilling.
The gundrilling process and tooling have been refined for maximum performance and use on modern,
dedicated machinery. Firearms continue to be a common application for gundrilling. Other industries
include diesel fuel components, medical tooling, plastic injection molds, and more.
Our decicated engineers and skilled staff enable us to provide the best Cabide Gun Drill Blanks for the market domestic and abroad:
Single hole Carbide Gun Drill Blanks
Double Hole Carbide Gun Drill Blanks
kidney holes Carbide Gun Drill Blanks
330 mm Carbide Gun Drill Blanks (Double Hole)
|
D(mm)
|
Tolerance
|
d1
(mm)
|
Tolerance
(mm)
|
d2
(mm)
|
Tolerance
(mm)
|
length
(mm)
|
Tolerance
(mm)
|
|
10
|
+0.5/+0.3
|
1.9
|
±0.2
|
2.3
|
±0.2
|
330
|
+3/0
|
|
10.5
|
+0.5/+0.3
|
1.9
|
2.3
|
330
|
|
11
|
+0.5/+0.3
|
2
|
2.4
|
330
|
|
12
|
+0.5/+0.3
|
2.2
|
2.5
|
330
|
|
12.5
|
+0.5/+0.3
|
2.2
|
2.5
|
330
|
|
13
|
+0.5/+0.3
|
2.4
|
2.7
|
330
|
|
13.5
|
+0.5/+0.3
|
2.4
|
2.7
|
330
|
|
14
|
+0.6+0.4
|
2.5
|
2.8
|
330
|
|
14.5
|
+0.6+0.4
|
2.5
|
2.8
|
330
|
|
15
|
+0.6+0.4
|
2.6
|
3.3
|
330
|
|
15.5
|
+0.6+0.4
|
2.8
|
3.3
|
330
|
|
16
|
+0.6+0.4
|
2.8
|
3.5
|
330
|
|
16.5
|
+0.6+0.4
|
3
|
3.5
|
330
|
|
17
|
+0.9+0.4
|
2.6
|
3.7
|
330
|
|
18
|
+0.9+0.4
|
3.2
|
±0.3
|
3.9
|
±0.3
|
330
|
|
19
|
+0.9+0.4
|
3.2
|
3.9
|
330
|
|
20
|
+0.9+0.4
|
3.5
|
4.2
|
330
|
|
21
|
+0.9+0.4
|
3.5
|
4.2
|
330
|
|
22
|
+0.9+0.4
|
3.5
|
4.5
|
330
|
|
23
|
+0.9+0.4
|
3.5
|
4.5
|
330
|
|
24
|
+0.9+0.4
|
4
|
5.5
|
330
|
|
25
|
+0.9+0.4
|
4
|
5.5
|
330
|
|
26
|
+0.9+0.4
|
4
|
5
|
330
|
|
27
|
+0.9+0.4
|
4.5
|
5.5
|
330
|
|
28
|
+0.9+0.4
|
4.5
|
5.5
|
330
|
|
29
|
+0.9+0.4
|
4.5
|
5.5
|
330
|
|
30
|
+0.9+0.4
|
5
|
6
|
330
|
|
31
|
+0.9+0.4
|
5
|
6
|
330
|
|
32
|
+0.9+0.4
|
5
|
6
|
330
|
|
33
|
+0.9+0.4
|
5
|
6
|
330
|
|
34
|
+0.9+0.4
|
5.5
|
6.5
|
330
|
|
35
|
+0.9+0.4
|
5.5
|
6.5
|
330
|
|
36
|
+0.9+0.4
|
6
|
7
|
330
|
|
37
|
+0.9+0.4
|
6
|
7
|
330
|
|
38
|
+0.9+0.4
|
6
|
7
|
330
|
|
39
|
+0.9+0.4
|
6.5
|
7.5
|
330
|
|
40
|
+0.9+0.4
|
6.5
|
7.5
|
330
|
330mm Carbide Gun Drill Blanks (Kidney Hole)
|
D(mm)
|
Tolerance
|
r1
(mm)
|
Tolerance
(mm)
|
r2
(mm)
|
Tolerance
(mm)
|
length
(mm)
|
Tolerance
(mm)
|
|
3.5
|
+0.5/+0.3
|
1.1
|
±0.2
|
0.7
|
±0.15
|
330
|
+3/0
|
|
4.5
|
+0.5/+0.3
|
1.1
|
0.7
|
330
|
|
5.5
|
+0.5/+0.3
|
1.3
|
0.8
|
330
|
|
6.3
|
+0.5/+0.3
|
1.6
|
0.9
|
330
|
|
6.9
|
+0.5/+0.3
|
1.1
|
0.7
|
330
|
|
7.6
|
+0.5/+0.3
|
1.7
|
1.2
|
330
|
|
8
|
+0.5/+0.3
|
1.8
|
1.3
|
330
|
|
8.6
|
+0.5/+0.3
|
1.9
|
1.3
|
330
|
|
9
|
+0.5/+0.3
|
2
|
1.4
|
330
|
|
9.7
|
+0.5/+0.3
|
2.2
|
1.4
|
330
|
|
10.5
|
+0.5/+0.3
|
3.2
|
2.4
|
330
|
|
Short Carbide Gun Drill Blanks
|
|
d
|
d1
|
d2
|
d3
|
L
|
|
(mm)
|
(mm)
|
(mm)
|
(mm)
|
mm
|
|
17
|
8
|
2.6
|
3.7
|
45
|
|
18
|
8.6
|
3.2
|
3.9
|
51
|
|
19
|
9
|
3.2
|
3.9
|
51
|
|
20
|
9.6
|
3.5
|
4.2
|
55
|
|
21
|
10
|
3.5
|
4.2
|
55
|
|
22
|
10.6
|
3.5
|
4.5
|
58
|
|
23
|
11
|
3.5
|
4.5
|
58
|
|
24
|
11.4
|
4
|
5
|
58
|
|
25
|
11.9
|
4
|
5
|
61
|
|
26
|
12.4
|
4
|
5
|
61
|
|
27
|
12.9
|
4.5
|
5.5
|
61
|
|
28
|
13.4
|
4.5
|
5.5
|
63
|
|
29
|
13.4
|
4.5
|
5.5
|
63
|
|
30
|
14.4
|
5
|
5.5
|
65
|
|
31
|
14.9
|
5
|
6
|
65
|
|
32
|
15.4
|
5
|
6
|
65
|
|
33
|
15.4
|
5
|
6
|
65
|
|
34
|
16.2
|
5.5
|
6.5
|
65
|
|
35
|
16.2
|
5.5
|
6.5
|
65
|
|
36
|
17.2
|
6
|
7
|
65
|
|
37
|
17.9
|
6
|
7
|
65
|
|
38
|
17.9
|
6
|
7
|
65
|
|
39
|
18.7
|
6.5
|
7.5
|
65
|
|
40
|
18.7
|
6.5
|
7.5
|
65
|
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