Motorized folding machines class SFM of solid welded construction are used to make square ventilation pipes and L-profiles with a TDC or TDF flange type. The maximum height of the flange is 35 mm. The stop bar allows making the precise alignment of the position before bending the sheet metal of different lengths, which facilitates operation by one person.

The SFM bending machines offer the following designs:

SFM - blade on all three beams 
SFM 3S - clamping blade is solid, folding and the bed blade are segmented