High-grade high-cobalt powder steel tooling (center drill bit/chamfering drill bit/forming drill bit)

※ Can produce straight flute, oblique flute, spiral flute etc. precise grinding machining.
※We can also provide mass production of center drill bit, chamfer drill bit, profile drill bit of ultra micro-grain quality carbide

※We can produce multi-step compound center chamfer drill bits.
※Mass production has higher
performance-to-price ratio
G
B
6
0
7
8
|
8
5

Specification		 D L1 L
max min
max min
0.8 3.15
1.5 1.1
33.5 29.5
1.0 3.15
1.9 1.3
33.5 29.5
1.25 3.15
2.2 1.6
33.5 29.5
1.6 4.0
2.8 2.0
37.5 33.5
2.0 5.0
3.3 2.5
42 38
2.5 6.3
4.1 3.1
47 43
3.15 8.0
4.9 3.9
52 48
4.0 10.0
6.2 5.0
59 53
5.0 12.5
7.5 6.3
66 60
6.3 16.0
9.2 8.0
74 68
8.0 20.0
11.5 10.1
83 77
 
Specification d2 D L1 L
max min
max min
1.0 2.12 4.0
1.9 1.3
37.5 33.5
1.25 2.65 5.0
2.2 1.6
42 38
1.6 3.35 6.3
2.8 2.0
47 43
2.0 4.25 8.0
3.3 2.5
52 48
2.5 5.30 10.0
4.1 3.1
59 53
3.15 6.70 11.2
4.9 3.9
63 57
4.0 8.50 14.0
6.2 5.0
70 64
5.0 10.60 18.0
7.5 6.3
78 72
6.3 13.20 20.0
9.2 8.0
83 77
 
A
N
S
I
B
9
4
.

pecification

NO

A:Inch c

D:Inch Metri

C:Inch Metric

L:Inch Metri
1
1/8 3.18
3/64 1.19
3/64 1.19
11/4 32
2
3/16 4.76
5/64 1.98
5/64 1.98
17/8 48
3
1/4 6.35
7/64 2.78
7/64 2.78
2 51
4
5/16 7.94
1/8 3.18
1/8 3.18
21/8 54
5
7/16 11.11
3/16 4.76
3/16 4.76
23/4 70
6
1/2 12.70
7/32 5.56
7/32 5.56
3 76
7
5/8 15.88
1/4 6.35
1/4 6.35
31/4 83
8
3/4 19.05
5/16 7.94
5/16 7.94
31/2 89
 

pecification

NO

 A:Inch Metric D:Inch Metric 60° E:Inch Metric C:Inch Metric L:Inch Metric
1
1/8 3.18
3/64 1.19
0.10 2.5
3/64 1.19
11/4 32
2
3/16 4.76
1/16 1.59
0.15 3.8
1/16 1.58
17/8 48
3
1/4 6.35
3/32 2.38
0.20 5.1
3/32 2.38
2 51
4
5/16 7.94
7/64 2.78
0.25 6.4
7/64 2.78
21/8 54
5
7/16 11.11
5/32 3.97
0.35 8.9
5/32 3.97
23/4 70
6
1/2 12.770
3/16 4.76
0.40 10.2
3/16 4.76
3 76
7
5/8 15.88
7/72 5.56
0.50 12.7
7/32 5.56
31/4 83
8
3/4 19.05
1/4 6.35
0.60 15.2
1/4 6.35
31/2 89
★We can produce special, compound, special-shaped,super-large/super-thin/ super-long combined profile series tooling
  according to requirements of drawings, samples, and dimension tolerance
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