The model 281 Lab Jack is uniquely designed to provide smooth, stable height adjustment and high load capacity. Conventional scissors and dual-pantograph jacks lift by decreasing the distance between crossed members and are inherently less stable at higher elevations. In contrast, Newport’s innovative design employs three orthogonal hinges that straighten to form a box, becoming more stable with increasing height. The side mounted height adjustment controls a stout drive screw connecting the pivot pins of the broad side hinges. The end hinge prevents tilting or swaying and ensures only vertical motion. The 281 Lab Jack is both English and Metric compatible. The top plate has an array of 1/4-20 tapped holes on 1 in. centers while the bottom plate has an array of M6 holes on 25-mm centers. Both the top and bottom plates have four clearance slots used for mounting the Lab Jack to the optical table.


281型实验室千斤顶设计独特，提供平稳、平稳的高度调整和高负载能力。传统的剪刀和双受电弓千斤顶通过减少交叉构件之间的距离来提升，在较高的高度上固有的稳定性较差。相比之下，新港的创新设计采用了三个正交的铰链拉直形成一个盒子，随着高度的增加变得更加稳定。侧面安装的高度调整控制一个坚固的驱动螺丝连接大侧面铰链的枢轴销。末端铰链防止倾斜或摆动，并确保只有垂直运动。281实验室千斤顶是英语和公制兼容。所述顶板在1英寸上有1/4-20抽头孔阵列。中心，而底板有一个阵列的M6孔在25毫米中心。顶部和底部板都有四个间隙槽，用于将实验室插孔安装到光学表上。