| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of chipping at groove working time, by forming a groove forming part of a ceramics-made multigroove roller by ceramics of a prescribed % or more alumina content. SOLUTION: A ceramics-made multigroove roller 1 for a wire saw is formed into a hollow cylindrical shape by ceramics. As this ceramics, an alumina content is 90% or more, for instance, ceramics of 97% purity or the like is used. In a surface 1a of the multigroove roller 1, a plurality of wire grooves 10 are provided with a space apart in a center core axial direction. Deflection in a radial direction of the wire groove 10 relating to the center core axis of the multigroove roller 1 is 20μm or less, deflection in an axial direction of the wire groove 10 relating to the center core axis of the multigroove roller 1 is 20μm or less. |
