When chip removal is a problem often, forming taps can provide a solution. No chips are cut but the metal is pushed or formed. 

METFLO from Regal Cutting Tools forms stronger threads & with the correct sized hole we eliminate oversize threads. It is required to apply different tests depending on the material used. It is important to make precisions of the iterations to ensure that the thread you want has been fully formed, taking into account the flow of the material during the forming.

As there is no chips, the edges of the tap are much more resistant to wear. Drain performance is improved drastically with yields of 3 to 10 times more than traditional taps.

Certain conditions are required to ensure that the "METFLO" Regal taps work:

a) The material must have sufficient elasticity so that the thread can be formed.

b) To produce a specific style of thread, the hole must be greater than recommended for the size of the thread you want to make.

A hole that is too large will produce a thread that will be too small and might break the tap. To determine the best bore diameter, you will need to try different sizes until you find the best solution.