Page 46 - Centerdrill Produktkatalog 2020 English
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Centertap threadformer
Centertap threadformer
While thread-forming with Centertap, the advantages of the flow-forming process are consistently
pursued. After flow forming in the first step, the DIN thread is cold-formed in the second step -
NO CUTTING, JUST FORMING! It is a non-cutting and chipless process, in which the
material becomes flowable and is displaced from the thread root to the thread crests.
Centertap thread formers are HSS-E tools and they are available in all common thread sizes.
Our standard offer includes metric and inch thread formers, with and without lubrication flutes, as
well as with a TIN coating. Metric fine, UNC, UNF, etc. thread formers are available on request.
A TiCn coating is also available on request.
Your advantages:
Non-cutting manufacturing process
It replaces the rivet nut, welding nut and thread cutting in thin materials
No more wobbeling, loosening or twisting
DIN thread by forming, no cutting needed!
The reinforced orientation of the material fibers results in high tensile strength threads,
even in thin materials
Creating 2 - 4 times more thread length than the original material
Highly accurates threads, therefore miscutting is not possible
Low wear after multiple connections due to increased hardness
3 to 10 times faster than thread cutting
Longer lifetime with special TIN- and TiCn coatings
Reduced friction, less burr formation and scoring
Can be automated
During the thread forming process, we recommend using our Centertap lubricants. Page 61.
Centertap holder - thread tapping chuck
In order to insert the thread former in machines with the switchable direction of rotation, we
recommend a tapping chuck with length compensation in tensile, compressive direction and pressure
point mechanism. Thus, an axial force neutral working of the thread former is possible and it
compensates a possible overrun of the machine spindle at the reversal point. In combination
with an appropriate quick-change unit with overload coupling, the protection function
is thus guaranteed for both - the tool and the machine spindle.
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