ToolsMining & QuarryingAggregate Processing

Roll Crusher Capacity Calculator

Estimate roll crusher throughput from roll dimensions, gap, speed, and fill factor. Supports smooth and corrugated rolls.

Last updated 21 July 2026

About this tool

Estimate double roll crusher throughput from roll dimensions, gap setting, rotational speed, bulk density, and fill factor. Supports smooth rolls (fill factor 0.2-0.3) and corrugated rolls (0.4-0.5).

How to use this tool

Enter roll diameter, width, gap, speed, density, and fill factor

Technical information

Q = π × D × S × W × N × 60 × ρ × k

Limitations

Theoretical capacity. Actual throughput depends on feed size distribution, material hardness, moisture, and nip angle. Fill factor is the critical variable — verify against operational data.

Revision history

21 July 2026: Initial release

Disclaimer

This tool is provided for educational and general information purposes only. It is not a substitute for professional engineering advice, design or verification.

Diggy and its contributors are not licensed engineering consultants and no results generated by this tool should be used directly for construction, design or safety-critical decisions.

All values and outputs are based on published empirical correlations and should be independently checked and confirmed by a qualified geotechnical engineer before use.

By using this tool, you accept full responsibility for how you interpret and apply the information provided.

Spotted an error? Let us know.

Roll diameter (mm)

Roll width (mm)

Gap / set (mm)

Roll speed (rpm)

Bulk density (t/m³)

Fill factor

Smooth: 0.2-0.3, Corrugated: 0.4-0.5

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