Figure 1 is a conventional inverted flat cutter bar. The operation process is as follows: the cutter bar 3 is passed through the flat hole, then the blade 2 is placed in the end square hole and the radius of the file is estimated, and the screw 1 is tightened to tighten the blade. 2. Boot, 锪 end face. After the completion, repeat the above opposite action and exit the arbor. Its shortcomings, 1锪 flat diameter can not be accurately determined, randomness, often cause rework or scrap. 2 blades are single
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