| 摘要 |
PURPOSE:To easily prevent deformation of a pin that connects a cutter head to a holder. CONSTITUTION:The fitting part of a cutter bit 1 is made up in T shape section and the insertion part thereof is inserted into the fork-shaped part of a holder 2. The diameter of the pin hole 1d of the cutter bit 1 is made larger than the diameter of a pin 4, and a gap is formed between the pin hole 1d and the pin 4. The front face 2a of the holder 2 is in contact with the stepped part 1a of the cutter bit, and the side 1c of the cutter bit 1 is in contact with the bottom face 2b of the fork-shaped part of the holder 2. |
