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威众特Tl、T2垂直轴系是采取圆柱形和圆锥形相结合的一种所谓半运动式的形式，其结构如图1所示（剖面图），内轴是柱形，而外轴则上端较下端为大，形成锥形，外轴顶端为45°斜面，其间均匀分布25颗滚珠，借此和内轴接触旋转。这种形式的轴系，虽然集合了柱形轴和锥形轴的优点，旋转灵活且比较稳定，但是也存在一定的缺点，主要是轴径间的空隙太大，容易产生振动误差，尤其是当仪器受到倾斜方向的撞击后，由于滚珠直接受力于45°斜面，而在旋转轨迹的一部份打下深深弹痕，因此使得垂直轴不能置于垂直方向，而引起整个照准部发生倾斜和位移，并且在转动时发生震动的噪声，严重的影响观测精度，这种现象并不是鲜见的，使用比较久的Wild T1、T2差不多都普通的存在这一问题。
Wei Zhong Te Tl, T2 vertical axis is to take a combination of cylindrical and conical form of a so-called semi-sport, the structure shown in Figure 1 (section), the inner shaft is cylindrical, while the outer shaft is the upper end Larger than the lower end, forming a cone, the top of the outer shaft is a 45 ° bevel, evenly distributed during the 25 balls, thereby rotating contact with the inner shaft. Although this type of shaft system integrates the advantages of a cylindrical shaft and a tapered shaft and is flexible and stable in rotation, it has some disadvantages, mainly because the gap between the shaft diameters is too large and vibration errors are easily generated, especially When the instrument is struck obliquely, the ball is forced directly at the bevel of 45 ° and a deep bulge marks a part of the rotation path, so that the vertical axis can not be placed in the vertical direction, causing the tilt of the entire camera And displacement, and the noise that vibrates during rotation seriously affects the observation accuracy. This phenomenon is not uncommon. This problem is almost common in the older Wild T1 and T2.