Step Drill with Straight Flute
Features:
Professional quality
CBN high ground surface, without burrs, longer life span.
Three different hardness for your choice.
Each step is axially CBN relie-ground, measnign the cutting edge is also the highest point of the axial cuttingaxis.
The cutting edge of each step has relief angle, meaning the cutting edge is also the highest point in advance direction
The CBN-ground point ensures centering and spot-drilling, even in thin-walled material
Material sheet:
| China |
European |
American |
Japanese |
HRC |
| HSS6542 |
HSS |
M2 |
SKH-51 |
63-65 |
| HSS Co5 |
HSS-E |
M35 |
SKH-55 |
64-66 |
Specifcations:
|
Order No
|
Size
|
Steps
|
Shank Size
|
|
STDR-20001
|
4 - 12mm
|
5 step
|
6mm/6.5mm
|
|
STDR-20002
|
4 - 12mm
|
9 step
|
6mm/6.5mm
|
|
STDR-20003
|
4 - 20mm
|
9 step
|
8mm
|
|
STDR-20004
|
4 - 22mm
|
10 step
|
8mm
|
|
STDR-20005
|
4 - 30mm
|
14 step
|
10mm
|
|
STDR-20006
|
4 - 39mm
|
14 step
|
10mm
|
|
STDR-20007
|
5 - 35mm
|
13 step
|
13mm
|
|
STDR-20008
|
6 - 18mm
|
7 step
|
10mm
|
|
STDR-20009
|
6 - 20mm
|
8 step
|
10mm
|
|
STDR-20010
|
6 - 24mm
|
10 step
|
10mm
|
|
STDR-20011
|
6 - 32mm
|
8 step
|
10mm
|
|
STDR-20012
|
14 - 24mm
|
6 step
|
13mm
|
|
STDR-20013
|
14 - 25mm
|
7 step
|
13mm
|
|
STDR-20014
|
20 - 34mm
|
8 step
|
13mm
|
|
STDR-20015
|
10 - 20mm
|
11 step
|
10mm
|
|
STDR-20016
|
20 - 30mm
|
11 step
|
13mm
|
|
STDR-20017
|
5 - 28.3mm
|
10 step
|
10mm
|
|
STDR-20018
|
6 - 30mm
|
13 step
|
10mm
|
|
STDR-20019
|
6 - 38mm
|
12 step
|
10mm
|
|
STDR-20020
|
6 - 26.75mm
|
7 step
|
10mm
|
|
STDR-20021
|
6 - 39mm
|
12 step
|
10mm
|
|
STDR-20022
|
6 - 37mm
|
12 step
|
10mm
|
|
STDR-20023
|
6 - 32mm
|
9 step
|
10mm
|
|
STDR-20024
|
6 - 40mm
|
16 step
|
13mm
|
|
STDR-20025
|
4 - 32mm
|
15 step
|
10mm
|
|
| |
|
Order No.
|
Size
|
Steps
|
Shank Size
|
|
STDR-21003
|
1/4" - 3/4"
|
9 step
|
3/8"
|
|
STDR-21004
|
3/16" - 7/8"
|
12 step
|
3/8"
|
|
STDR-21005
|
7/16" - 1 1/8"
|
12 step
|
3/8"
|
|
STDR-21006
|
1/4" - 1 1/2"
|
11 step
|
1/2"
|
|
STDR-21007
|
1/2" - 1"
|
9 step
|
3/8"
|
|
STDR-21008
|
9/16" - 1"
|
8 step
|
3/8"
|
|
STDR-21009
|
3/4" - 1 3/8"
|
11 step
|
1/2"
|
|
STDR-21010
|
13/16" - 1 3/8"
|
10 step
|
1/2"
|
|
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