SPECIFICATION SHEET • SI METRIC
CAT: PROCESS

Crusher Reduction Ratio

Calculate jaw, cone, or SAG crusher reduction ratio from 80% passing sizes F80 and P80.

💡 Engineering Knowledge PrimerThe 80% Reduction Ratio (RR80 = F80 / P80) defines how many times a crusher reduces top particle size. Primary jaw crushers typically achieve 4:1 to 6:1 ratios, while secondary/tertiary cone crushers operate between 3:1 and 5:1.
CALCULATION SCOPE — Deterministic calculation within the published assumptions. Independently verify all design decisions and project-specific code requirements.
INPUT DESIGN PARAMETERS (SI)
mm
mm
CALCULATED SPECIFICATION OUTPUT
80% Reduction Ratio (RR80)
✨
6 :1
Size Reduction Percentage83.3 %

Technical Methodology & Engineering Principles

GOVERNING EQUATION
RR80 = F80 / P80 Size Reduction = (1 - P80/F80) × 100%
Assumptions & Scope

Standard Bond comminution particle size distribution assumption.

Operating Range & Boundary

Use finite, physically meaningful inputs within the stated operating assumptions.