Disclosed is a rotating shaft structure for a polisher. The rotating shaft structure includes a shaft rod and a shaft sleeve, and further includes a shaft housing, a first clamping member, a second clamping member, and a third clamping member. One end of the shaft rod is connected to the shaft sleeve, and the other end of the shaft rod is connected to the third clamping member. One end of the third clamping member away from the shaft rod is provided with an openable clamping mouth. The first clamping member is in a hollow tubular shape. The second clamping member and the third clamping member are both located in the first clamping member, and the second clamping member is located at one side of the third clamping member away from the shaft rod. One end of the second clamping member sleeves the clamping mouth of the third clamping member.

A co-mouldable tube (10) includes with two rolling bearings (20) arranged along a respective axis (A) of rotation. A spacer (40) is interposed between the two rolling bearings (20) so as to give the co-mouldable tube (10) structural rigidity. A cylindrical containment sleeve (5) is co-moulded around the two rolling bearings (29) and the spacer (40). Two metal bushes (60) are interposed between the cylindrical sleeve (50) and the two rolling bearings (20) so as to be co-moulded together with the said cylindrical sleeve (50).