Many manufacturers are entangled in the problem of screw rods when purchasing the electronic tensile testing machine. In the end, is the choice of ball screw or trapezoidal screw? Before deciding, let's understand the characteristics of the two, what is there? different

1. Economical From the previous and current situation, the ball screw is still more expensive than the shape screw because of its complicated structure. However, with the increase in automation, the output is getting smaller and the price difference is getting smaller.

2.  2, self-locking The self-locking property is generally inversely proportional to the transmission efficiency. The higher the transmission efficiency, the smaller the self-locking property. Therefore, the ball screw has almost no self-locking property and the trapezoidal screw has a certain self-locking property.

 3, transmission efficiency Since the ball screw has a lot of balls between the screw shaft of the ball screw pair and the screw nut for rolling motion, the movement efficiency is high. That is, if you drive the same large negative wear, you can use a smaller drive power with a ball screw, for example, smaller. Power tensile testing machine that reduces costs and reduces energy consumption The ball screw is rolling friction, and the trapezoidal screw is sliding friction. The temperature rise of the former is much lower than that of the latter during operation, so it can undertake high-speed transmission tasks. The surface friction of the rolling friction is much smaller than that of the sliding friction, so the ball screw has a much higher maintenance life than the shape screw when the conditions such as cleaning and lubrication are met. The ball screw is a place where the ball belongs to the rolling friction, the twist is fast and the precision is high, but it is not suitable for heavy load! The screw wire is also called the trapezoid wire, which is sliding friction, low efficiency, low degree, but good rigidity. Used for heavy loads. Beaded silk The meshing clearance of the drive pair can be arbitrarily adjusted to achieve a better fit accuracy, which is especially important for reducing the commutation error. The matching clearance of ordinary threads is difficult to adjust.