| 摘要 |
PURPOSE:To increase the rotary strength at the fixing section without sacrifice of the coupling performance with the grinding section and the grinding capacity, by forming the central fixing section of an offset grindstone with a high density polishing material. CONSTITUTION:A grinding section 2 of continuous ring plate is formed at the outercircumference of a concave fixing section 1 having central fixing hole 1a, to produce an offset grindstone A. Said fixing section 1 is formed with a polishing material employing the grindstone particle finer than the normal grindstone particle employed at the grinding section 2, to increase the rotary strength at the fixing section 1 thus to prevent the crack at the fixing section 1 when using the grindstone A under the high speed. |
