While many ball heads from other manufacturers clamp the ball by pressing the housing down (as is the case with the simple FLM ball heads without friction and the industrial ball joints) or by a slot in the housing, the ball heads of type CB-F/FT/FTR use an ingenious mechanism that is patented and may not be copied. This mechanism has made it possible for the ball to be clamped without misalignment. This means that with simple ball heads, the ball with mounted camera will follow an offset during the clamping process, despite being held firmly. The camera must therefore be readjusted several times and the holding point must be relocated so that the camera is fixed in the desired position.
This is not the case with the FLM ball heads with friction type CB-F/FT/FTR. The camera remains in the desired position even after the ball has been clamped. Neither the housing nor the base unit is lifted for clamping. Instead, a complex system lifts the ball itself and presses it against the housing. The tight tolerances in all components in conjunction with the ingenious mechanism enable offset-free clamping. FLM ball heads are the only ones that work in this way and are therefore one of the few that can clamp without misalignment. Thanks to the invention of Werner Bürklin, the inventor of the FLM ball heads.