Cutting unit for cutting inner threads comprises connecting devices for exchanging on a main spindle of a machine with computer-controlled numerical control and fixed to the cutting unit

摘要

Cutting unit (1) comprises connecting devices (7, 18, 19) for exchanging on a main spindle of a machine with computer-controlled numerical control and fixed to the cutting unit. The cutting unit has a fixed part (2) and a moving part which moves in relation to the fixed part. A guiding nut (22) is provided in the fixed part and has a guiding spindle (8). Preferred Features: A toothed arrangement (14) is formed between the main spindle and the guiding spindle for transferring rotary movement. A highly precise thread (21, 22a) is formed between the guiding spindle and the guiding nut.