In this paper, a novel radial loading topology is proposed for various spindle test application where the space in the tool head is limited or the performance to the length is sensitive. The stator of the loading device grows in the lateral direction, allowing for a compact axial length design. Finite element analysis (FEA) is carried out and the device design is optimized for the specifications of a radial loading device for high speed spindle. Finally, the designed device were manufactured and tested. By using this magnet loader, measurement results are given and the effectiveness of the designed prototype has been verified.

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