ball screw lead formula

There is still a certain gap between Chunxin and THK in terms of performance, precision, life and reliability, but in recent years Chunxin has made significant progress in technology learning from international brands, and some of Chunxin's high-end products are close to the technical level of THK. The following are the main differences: 1. Materials and heat treatment THK Ball Screw: Using high-quality alloy steel (such as SCM, SUJ2), strict heat treatment process (such as carburizing quenching, low temperature deep cryogenic treatment), uniform hardness, strong wear resistance, and good residual stress control. CHUNXIN Ball Screw: The material purity (such as GCr15) and heat treatment stability are slightly inferior, and uneven hardness or deformation is prone to occur, but Chunxin has now introduced advanced heat treatment equipment, and the gap is gradually narrowed. 2. Manufacturing process and precision THK Ball Screw: Precise grinding process (thread raceway roughness Ra≤0.1μm), precise preload control. The precision level can reach ISO P1~P3 (C0~C3), and the reverse clearance is extremely small (≤0.005mm). CHUNXIN Ball Screw: The low-end and mid-end products are mainly rolled, and the precision is mostly P5~P7 (C5~C7); the high-end ground screw can reach P3. There are still fluctuations in the consistency of preload force and the accuracy of raceway shape, but the process is improved through CNC grinders. 3. Life and reliability THK Ball Screw: The dynamic load life calculation is conservative (such as THK's nominal life can reach 100,000 hours), and the failure rate is low in actual use. CHUNXIN Ball Screw: The nominal life is close (refer to ISO 3408 standard), but due to the influence of materials, lubrication and assembly, noise may increase or precision may decrease after long-term use. Chunxin improves reliability by optimizing ball circulation design (such as the reverser structure). 4. Technological innovation THK Ball Screw: Many patented technologies (such as THK's "Hatchet" returner). Provide high value-added solutions (such as dustproof seals, high-speed silent design). CHUNXIN Ball Screw: Has advantages in customized services (such as non-standard strokes) and cost-effectiveness. 5. Price and delivery cycle THK Ball Screw: High price (about 2~3 times that of domestic products with the same specifications), long delivery cycle (usually 8~12 weeks). CHUNXIN Ball Screw: Obvious cost advantage (especially low-precision models), fast delivery (2~4 weeks for conventional models), suitable for scenarios with limited budgets or urgent replacement. Based on the above analysis, the Chunxin brand is gradually moving towards international standards. In the future, Chunxin will continue to learn to bring ball screws into intelligence through intelligence. If you are interested, please contact us at https://www.chunxinauto.com/contact, looking forward to your information.