Our carbide grades

Continuing Dr. Konrad Friedrichs' tradition of high quality carbides, Konrad Micro Drill offers rods in diameter ranges from Ø0.8mm to Ø25.2mm and flat bars in various grades. As the leader in the PCB-business area and through new manufacturing procedures, Konrad Micro Drill can offer various grades for many applications to its customers. These carbide grades were developed through heavy expenditures in R&D with high performance and outstanding quality in mind.
Below you can find all of our grades and their different applications and advantages. You have a special requirement? Don´t hesitate and send your inquiry.

 

Grade Overview

 

Grades of Konrad Micro Drill

Grade

WC grain size

Co

Hardness TRS KIC 4πσ HC

 

[µm]

[%]

HV
[ISO 3878]
HRC
[ISO 3738]
[N/mm2]
[ISO 3327]
[Mnm-3/2] [µTm3/kg] [kA/m]

KFM 308/38

0.3

8.0

1970 94.0 4300 9.2 12.0 35.0

KFM 47

0.4

7.0

1980 94.0 4500 9.0 11.0 36.0

KFM 39

0.3

9.0

1950 93.9 4500 9.3 14.5 36.0

KFM 44

0.5

12.0

1680 92.5 4000 10.0 18.7 26.3

KFM 606/66

0.6

6.0

1900 93.8 4000 9.3 9.3 28.0

KFM 40

0.6

10.0

1610 92.0 3800 10.5 16.0 20.1

KFM G20

3.0

11.5

1300 n.m. 2600 n.m. 19.3 14.0

 
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