How to design and select a planetary roller screw or ball screw?
2026-04-06 06:00:54··#1
1. Simple selection ; calculate the required lead of the lead screw, the required dynamic load (wear load), and the static load. First, determine the allowed rotation speed, then check the required equipment size limitations and price range. Done. Enough with the chit-chat. Just input the basket information into our company's calculation spreadsheet and press Enter to automatically calculate.
There are generally four basic things to pay attention to here: 1. Whether the post-impact load exceeds the destructive load. 2. Life and wear calculation; 3. Shaft length to diameter ratio (calculate bending resistance); 4. Clearance elimination (this involves applying preload).
Lifespan calculations generally involve the average load over the entire wear path of your equipment. The simulation diagram is shown below. Calculate the average value yourself, then compare it with the dynamic load of the lead screw sample you selected, and then calculate the life.
Bending resistance Calculation; regardless of the precision level Elastic deformation Both bending resistance and strength need to be considered. You can calculate it yourselves. Note: Generally, the Swiss precision grades are G3 (KL10) and G1 (KL5), which correspond to C3 and C0 in Japan and Taiwan. 2. Regarding motor selection , my calculation sheet is only for sales purposes; in fact, it's for calculating acceleration and deceleration. Torque calculations are still required; feel free to contact me if you have any questions. Below is our sample brochure; the first 18 pages contain simple selection calculations. Learning these will ensure you can design at least 0.02mm precision ball screw drive systems without any problems. Our company provides planetary roller screws, small lead ball screws, and bearing housings. servo motor Technical services. The detailed calculation software can be downloaded from the following link; https://www.zhihu.com/question/388082929/answer/2890851855
