JWB Ball Screw Vertical Customizable Screw Jack

 Ball screw operation,The temperature rise can affect the accuracy of the mechanical transmission system.,Especially high-speed and high-precision machinery,The following are factors affecting the temperature rise of ball screw.

The factors contributing to temperature rise are primarily these three:

(1) The Influence of Screw Jack Pre-Tension: It is crucial to enhance the rigidity of the nut to prevent any missteps in the mechanical transmission system. However, to increase the nut rigidity, it is necessary to achieve a certain level of nut pre-tension. Applying pre-tension to the nut increases the friction torque of the threads and raises the temperature rise during operation.

HIWINSuggestion: medium-heavy pre-compression8%The dynamic load; medium pre-pressure6%～8%; Medium light pre-pressure4%～6%Light pre-pressure4%Below, the pre-pressure shall not exceed10%Operate at the dynamic load for optimal lifespan and reduced temperature rise.

(2) Screw Jack The impact of lubrication: The choice of lubricant directly affects the temperature rise of ball screw.HIWINBall screw must be lubricated with oil or grease.

(3) When the working condition is high speed and low load, it is preferable to choose low-viscosity oil products; for low speed and high load, it is recommended to use high-viscosity oil products. Generally speaking, it is recommended to use lubricant at high speeds.40℃Viscosity index range at the moment32～68 cSt (ISO VG 32～68)(DIN  51519)At low speeds, it is recommended to use lubricant for40℃Viscosity index range90 cSt (ISO VG 90)Above. Suitable for high-speed and heavy-load applications, it requires forced cooling to lower temperatures, and cooling can be achieved by introducing cooling oil through a hollow screw.

(4) screw jack The effect of pre-loading: As the ball screw lift mechanism heats up, thermal stress effects can cause the screw to elongate, making the screw length unstable. The elongation can be attributed toM40The elongation can be compensated for by pre-stretching, with the target value for pre-stretch compensation being indicated by the negative marking on the drawing.TExcessive pre-tension can damage the support bearings, therefore...HIWIN We recommend using less than5℃The pre-tension value, but if the screw diameter exceeds50mmTiming is not suitable for pre-tensioning; a larger screw diameter requires a greater pre-tensioning force, which can lead to overheating and burning of the support bearings.HIWINSuggest approximately3℃The temperature rise as compensation valueTPlease provide the Chinese content to be translated. (Screw shaft each1000mmAbout -0.02~-0.03mm)。