Silver & deming drill bits are designed with 1 / 2 " shanks with 3 flats, to fit 1 / 2 " drill chucks. silver & deming drill bits are used in both drill presses and portable drills where the drill diameter is larger than chuck available. Silver & deming drill bits are provided with a Black-Oxide treatment for abrasion resistance and helps to prevent chip welding.
Nominal diameter
Dh8
mm
Overall length
L
mm
Flute length
l
mm
13.00
152.40
76.20
13.50
152.40
76.20
14.00
152.40
76.20
14.50
152.40
76.20
15.00
152.40
76.20
15.50
152.40
76.20
16.00
152.40
76.20
16.50
152.40
76.20
17.00
152.40
76.20
17.50
152.40
76.20
18.00
152.40
76.20
18.50
152.40
76.20
19.00
152.40
76.20
19.50
152.40
76.20
20.00
152.40
76.20
21.00
152.40
76.20
22.00
152.40
76.20
23.00
152.40
76.20
24.00
152.40
76.20
25.00
152.40
76.20
26.00
152.40
76.20
27.00
152.40
76.20
28.00
152.40
76.20
29.00
152.40
76.20
30.00
152.40
76.20
31.00
152.40
76.20
32.00
152.40
76.20
33.00
152.40
76.20
34.00
152.40
76.20
35.00
152.40
76.20
36.00
152.40
76.20
37.00
152.40
76.20
38.00
152.40
76.20
Nominal diameter
Dh8
inch
Overall length
L
inch
Flute length
l
inch
17/32
6
3
9/16
6
3
19/32
6
3
5/8
6
3
21/32
6
3
11/16
6
3
23/32
6
3
3/4
6
3
25/32
6
3
13/16
6
3
27/32
6
3
7/8
6
3
29/32
6
3
15/16
6
3
31/32
6
3
1
6
3
1 1/16
6
3
1 1/8
6
3
1 3/16
6
3
1 1/4
6
3
1 3/8
6
3
1 1/2
6
3
1999-2012 SCHARP TOOLS CO.,LTD. All Rights Reserved 苏 ICP 备 05011968 号
