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Step Drill Bits with Spiral Flute
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Product Name: Step Drill Bits with Spiral Flute
Product Numbers: STDR-10001
Product Specifications: 4-12,20-30
Product Unit: CBN fully ground
Product Remark: For Drilling
Product Class:Machinery and Engineering Tools > Cutting Tools For Machine > HSS Step Drill Bits
Product Details
【DateTime:2010-05-25 Browse:】【Font: Big Mid Small】【Print】【Close
Step Drill Bits with Spiral Flute Application: 
    For drilling and roughening of sheet material, pipes and profils and deburring of bot sides in one step. ROK drills bit are CBN(cubical boron nitride) highly ground, without burrs.
Features:
   Split point: Redues walking which is the tendency of a spinning bit to rotate away from the point at wichi you want to drill
    CNB fully ground flute provides quiet running and high cutting performance.
    Hole is Laser marking on the tools
    Made by high-performance HSS, high wear resistance and long life span.
   
Material sheet: 
 China  European  American  Japanese  HRC
 HSS6542  HSS  M2  SKH-51  63-65
 HSS Co5  HSS-E  M35  SKH-55  64-66
 Note: HSS Co5 is a development of HSS6542 and contains 5%cobalt which gives improved hardness, ware resistance and red hardness.  
 Specifications:
Order No.
Size
Steps
Shank Size
STDR-10001
4 - 12mm
5 step
6mm/6.5mm
STDR-10002
4 - 12mm
9 step
6mm/6.5mm
STDR-10003
4 - 20mm
9 step
8mm
STDR-10004
4 - 22mm
10 step
8mm
STDR-10005
4 - 30mm
14 step
10mm
STDR-10006
4 - 39mm
14 step
10mm
STDR-10007
5 - 35mm
13 step
13mm
STDR-10008
6 - 18mm
7 step
10mm
STDR-10009
6 - 20mm
8 step
10mm
STDR-10010
6 - 24mm
10 step
10mm
STDR-10011
6 - 32mm
8 step
10mm
STDR-10012
14 - 24mm
6 step
13mm
STDR-10013
14 - 25mm
7 step
13mm
STDR-10014
20 - 34mm
8 step
13mm
STDR-10015
10 - 20mm
11 step
10mm
STDR-10016
20 - 30mm
11 step
13mm
STDR-10017
5 - 28.3mm
10 step
10mm
STDR-10018
6 - 30mm
13 step
10mm
STDR-10019
6 - 38mm
12 step
10mm
STDR-10020
6 - 26.75mm
7 step
10mm
STDR-10021
6 - 39mm
12 step
10mm
STDR-10022
6 - 37mm
12 step
10mm
STDR-10023
6 - 32mm
9 step
10mm
STDR-10024
6 - 40mm
16 step
13mm
STDR-10025
4 - 32mm
15 step
10mm
 
Order No.
Size
Steps
Shank Size
STDR-11001
3/16" - 1/2"
6 step
1/4"
STDR-11002
1/8" - 1/2"
13 step
1/4"
STDR-11003
1/4" - 3/4"
9 step
3/8"
STDR-11004
3/16" - 7/8"
12 step
3/8"
STDR-11005
7/16" - 1 1/8"
12 step
3/8"
STDR-11006
1/4" - 1 1/2"
11 step
1/2"
STDR-11007
1/2" - 1"
9 step
3/8"
STDR-11008
9/16" - 1"
8 step
3/8"
STDR-11009
3/4" - 1 3/8"
11 step
1/2"
STDR-11010
13/16" - 1 3/8"
10 step
1/2"
Additional surface hardening:
Tin: For hard materials
        Extended Service lives
        Higher cutting speed
        Higher tool life
        Temperature resistance up to 600 degree.
        Sureace treatment ca.2.500HV
        Layer thickness up to 0.002mm
        Reduces cold weldings
TiAIN: For particularly hard materials.
         Outstanding service lives
         Highest cutting speeds
         Optimized tool life
         Surface treatment Ca. 3.500HV
         Layer Thickness up to 0.004mm
         Reduces cold weldings
         Temperature resistance up to 800 degree

Step Drill Bits with Spiral Flute

Titanium Coated

TiAIN coated

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