Life Expectancy: XPR Precision Rolled and SGT Precision Ground Inch Screws
TO USE THIS CHART
- Determine required Life (in million inches of travel) at equivalent operating load.
- Find point at which load and life requirements intersect.
- Select ball nut to the right or above the intersect point.
NOTE: IF USING A BALL SCREW WITHOUT LUBRICANT DE-RATE LIFE BY 90%.Figure 1