The invention relates to a frame for small capacity cascade-type cylinder with four rollers and three successive grindings for milling grains. According to the invention, the cylinder frame has some walls (1, 2) provided with some mortises (a,a'; c,c'; d,d') for the passage of shaft ends, for three rollers (A, C, D), while some orifices (b, b') cut within the frame walls ( 1, 2) allow the access to a fourth roller (B), namely the driving roller, one or both of the orifices having a diameter larger than the diameter of the driving roller (B), but equal to the diameter of said bearing. The passage mortises (a,a'; c,c'; d,d') are closed by some adequately sized keys and by screws, ensuring a good stiffening and tightness of the entire frame.
