The invention concerns a quick-action clamping apparatus (8, 108), in particular a one-hand quick-action clamping apparatus (8, 108), for clamping a first assembly (36, 136) of a pelletizing apparatus (2, 102) to a second assembly (38, 138) of the pelletizing apparatus (2, 102), in particular a pelletizer (4, 104) to a cutting chamber (6, 106). According to the invention there is proposed a mounting element (44, 144) which is arranged at the first assembly (36, 136) or the second assembly (38, 138), a locking element (40, 140) which is arranged at the other of the first assembly (36, 136) or the second assembly (38, 138), and a clamping means (10, 110) having a clamping element (32, 132), wherein the clamping element (32, 132) is mounted rotatably about an axis of rotation (D) to the mounting element (44, 144) and the clamping element (32, 132) is adapted to be pivoted into a clamping position (S) in which the clamping element (32, 132) is in engagement with the locking element (40, 140) and braces the first assembly (36, 136) against the second assembly (38, 138). The invention further concerns a pelletizing apparatus (8, 108) and a method of bracing a pelletizer (4, 104) to a cutting chamber (6, 106).