: This is the distance the nut moves in one full revolution. A 5mm lead (SFU1605) is a popular balance between speed and torque for hobbyist machines.
💡 Check if the screw ends are machined . Most sellers offer "standard machining" for BK/BF blocks. If they aren't machined, you'll need a lathe to fit them into the bearings yourself. If you'd like to narrow this down, let me know: What are you building ? (e.g., CNC, 3D printer, heavy lift) How much weight/load will it carry? Do you have a specific budget in mind? ball screw buy
Backlash is the tiny "wiggle" or axial play when the screw reverses direction. : This is the distance the nut moves in one full revolution
: Ultra-high precision. Used in lab-grade measuring equipment and high-end CNC machining centers. Most sellers offer "standard machining" for BK/BF blocks
: Specifically BK (fixed side for the motor) and BF (floated side) bearing blocks.