The lock nut for THK Ball Screw can fasten the screw shaft and bear very easily and accurately. The use of an anti-loosening mechanism composed of a hexagon socket head fixing screw and a mounting piece can prevent the locking nut from loosening and ensure a firm connection. Next, let’s take a look at the accuracy and manufacturing method of the THK Ball Screw. Here are some answers.
Here is the content list:
- The accuracy of THK Ball Screw.
- The manufacturing method of THK Ball Screw.
The accuracy of THK Ball Screw.
According to GB classification, THK Ball Screws are classified into P and T, namely transmission and positioning. The accuracy grades are 1, 2, 3, 4..Foreign THK Ball Screw products generally do not distinguish between transmission or positioning, and all use C0~C10 or specific numerical representation. Generally speaking, general-purpose machinery of ordinary numerical control machinery choose C7 or below, high-precision numerical control machinery choose C5 (±0.018) above C3 (±0.008) below, optical or detection machinery choose C3 above. In particular, it is important to note that accuracy and price are highly correlated, and the concept of accuracy is combination and maintenance. That is to say, the lead error of the screw cannot explain the error of the whole set of screws, and the factory precision cannot mean that this accuracy is maintained within the rated service life. This is a reliability issue, which is related to the manufacturer’s production process.
The manufacturing method of THK Ball Screw.
There are two main manufacturing methods of THK Ball Screw: rolling and grinding. The former is also called rolling manufacturing or transformation, and is generally denoted by F. The latter is also called grinding and manufacturing, and is generally represented by G. Due to the difference in technology, the two can achieve different levels of accuracy. At present, the highest accuracy that can be achieved by the rolling method is the C5 level. Grinding can produce products with higher precision. However, please note that there is no reverse inevitability between the two manufacturing methods and accuracy and performance. In other words, if the accuracy you choose is C7, it has nothing to do with how it was made.
I have encountered many professional sales staff of manufacturers who may not know the detailed difference between the two. So a few more words: rolling belongs to batch manufacturing, and grinding belongs to precision manufacturing. The production efficiency of the former is much higher than that of the latter, but the cost of manufacturing equipment of the former is also much higher than that of the latter. In other words, the entry barrier for ground THK Ball Screw is low, and the entry barrier for rolling production is higher. Manufacturers that can produce rolled screws generally can also produce ground screws, while manufacturers that can produce ground screws may not necessarily be able to produce rolled screws. Therefore, if the THK Ball Screw with the same precision can buy rolled products, don’t buy grinding products. The reason is simple: cheap. Another point is that rolling and grinding only refers to the screw, and the nut is all manufactured by grinding.
If you are engaged in work related to THK Ball Screw or information about our company, you can contact us. Our official website is https:// www.ws-thk.com/.