Interactive ball-screw selection wizard: enter axial load, speed and support span to get L10 life, critical speed Nc, buckling margin, and recommended accuracy grade, preload class and support-unit pair.
Six steps: 1) enter parameters 2) check life 3) check speed 4) check buckling 5) pick accuracy and preload 6) match the support unit. Each step links to its detailed guide.
Enter duty parameters
Step 2: is rated life enough?
Step 3: is speed below critical?
Step 4: buckling risk under compression?
Step 5: accuracy grade and preload
Step 6: match the support unit
Opens the inquiry form with your selection pre-filled — just add your contact details and send.
Each step links to the guide that carries the formula, factors and a worked example; this page just connects them.
| Check | Formula | Guide |
|---|---|---|
| Rated life | L = (Ca/Fm)³×10⁶ | Sizing |
| Critical speed | Nc = (f·d1/Lc²)×10⁷ | Sizing |
| Buckling load | Pc = π²EI/Le², I=π·d1⁴/64 | Sizing |
| Preload class | P0–P4, ≤8% CNC / ≤5% automation | Preload |
| Accuracy grade | JIS B 1192 e300 | Lead Accuracy |
| Support unit | D1 / Cr / C0 | Bearing Load Chart |
Formulas per JIS B 1192 and common ball-screw design practice. This wizard is a screening tool; the model catalogue governs final sizing.
Formulas per JIS B 1192 and common ball-screw design practice; support-unit data from MOSIONX 2026 catalogue chapter G.