Robert Speck Ltd
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Form Drilling Process
A thermal drilling process also known as flowdrilling is a method of making a hole and simultaneously producing a bush from the parent metal this gives additional support as a bearing surface or for a thread.
Make a hole and form a bush in one operation. Standard drilling machines can be used, or we can supply.
Frictional heat is generated by speed and pressure so that the material can be formed.
Fast - only takes one second plus one second for every millimetre of material thickness.
The completed bush gives additional support as a bearing for a thread.
Threads are produced by roll forming. No material is removed.
FORMDRILLING TOOLS ARE MADE FROM TUNGSTEN CARBIDE. THEIR CONICAL BODY HAS SPECIALLY DEVELOPED LOBED GEOMETRY.
The Process is :
1 second plus 1 second for each mm of material thickness;
Working the material gives improved strength. Redistribution into a bush supports the hole;
No inserts to break free;
No fittings to purchase. Tools willl normally produce more than 10,000 holes;
Can be used in most malleable materials - steel, stainless steel, copper, aluminium;
The rotating drill point is brought into contact with the material surface. Pressure is applied, heat is generated through friction. As the material heats up it softens and the drill is pushed through creating a hole and a bush simultaneously.