Choosing the optimal nut configuration is the most critical step in defining your system's performance. Match the internal architecture to your application's primary requirement: Force, Speed, or Environmental Durability.
1."U-Type" (SFU / DFU Series) – The Industrial Workhorse:
Utilizing external return tubes for ball circulation, this series offers the industry-standard balance of torque transmission, load capacity, and cost-efficiency. It is the premier choice for 80% of general automation, CNC routing, and vertical lifting tasks.
2."E-Type" (SFE Series) – The Speed Specialist:
Engineered with internal end-cap circulation for a streamlined profile and reduced noise. These "High-Lead" models typically feature a 1:1 diameter-to-lead ratio (e.g., 20mm shaft/20mm lead), making them essential for high-speed packaging, pick-and-place robotics, and clean-room applications where rapid cycle times are critical.
3."Y-Type" (SFY Series) – The Armored Speedster:
Combining the high-velocity performance of the E-Type with a reinforced wiper system. These nuts are designed to aggressively exclude debris, making them ideal for woodworking CNCs, plasma tables, and laser cutters that operate in high-particulate environments.
4."S-Type" (SFS / High-Load Series) – The Hydraulic Alternative:
Features a reinforced nut body with maximized ball circuit density. Built to handle extreme axial force, these screws are designed to replace hydraulic cylinders in electric injection molding machines, servo presses, and heavy-duty industrial actuators.