PORTAL FINISHING MACHINE HAVING V-V ROLLING GUIDE ON CROSS RAIL

PROBLEM TO BE SOLVED: To prevent generaiton of mechanical waviness or shock in a saddle by providing a V-V rolling guide to which a saddle is fitted, the saddle being provided with a spindle head having a spindle to which a cutter or the like is fitted at one end face and with a balance weight at the other end face. SOLUTION: A portal finishing machine 10 is provided with a portal column 12 striding over a table 11 moved in the X direction, and the portal column 12 is provided with a cross rail 13 in the Y direction above the table 11. The cross rail 13 is provided with a V-V rolling guide 14, a spindle head 16 capable of moving in a direction of Z and fitted with a spindle 15 at one end face is installed to be guided by the V-V rolling guide 14, and on the other end face, a saddle 18 fitted with a balance weight is moved in the direction of Y. Thus, the saddle 18 fitted with the spindle head 16 is stably moved by the V-V rolling guide 14.