Your specialist
in flow drilling

Centerdrill REPLACES

With the flow drilling process (also known as Centerdrill, friction drilling, flow forming, thermal drilling process) we replace the rivet nuts, welding nuts and thread cutting in thin materials.

Welding nuts - Thread cutting - Rivet nuts
Loosening and turning!

The Centerdrill result

With the flowdrilling process with centerdrill we produce a bush and a DIN-thread in only two operations. You will get a sufficient quantity of supporting thread turns for high extraction forces. No more wobbling, loosening or twisting!

Ideally suited for…

These holes can be used for screw- or plug connection.


Possible surface

Depending on your need you can receive a surface on your workpiece with collar or without collar (flat). Your choice of surface determines the right type of Centerdrill (with or without cutters). The flow drilling process eliminates the need for welded nuts, rivet nuts and the need for thread cutting in thin-walled applications.

Bush length

With the flow drilling process you are able to create bush lengths with factor 2-3 from the original material thickness. Depending of thread size and material thickness it can also be significantly more. For example with our Centerdrill G3/4”: In 1.5 mm steel you can achieve a bush length about 12 mm. Your benefit with our Centerdrill-Know-How: The bushing length can be influenced in various ways (shortened or extended).



Example 2mm steel with M8, estimated service life
= approx. 8.000 holes with Centerdrill + Centertap

Material Costs


Centerdrill 7.3 long = 76.50 EUR / pc.
Thread former M8 = 26.00 EUR / pc.
= 102.50 / 8.000 holes = 0,013 EUR / DIN thread

Interesting facts at a glance

Here you can see the most important information about the centerdrill process, also known as flow drilling process, friction drilling, flow forming, thermal drilling process or form drilling.


Centerdrill GmbH
Valterweg 19
D-65817 Eppstein

Tel. +49 (0) 6198/5858-97
Fax. +49 (0) 6198/5858-99


Tel. +49 (0) 6198/5858-97


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