1. PAINPOINT DRIVEN OPENING

Are inconsistent feed materials and rising operational costs impacting your mineral processing or aggregate production line? Inefficient size reduction directly translates to lost revenue through excessive energy consumption, premature wear part replacement, and unplanned downtime. Consider these common challenges:
High Operational Cost: Oversized motors and inefficient grinding mechanics lead to unsustainable power draw per ton of processed material.
Excessive Downtime for Maintenance: Frequent hammer replacement and rotor servicing halt your entire crushing circuit, creating costly bottlenecks.
Inconsistent Product Gradation: Uncontrolled particle size distribution fails to meet downstream process requirements, reducing final product quality and value.
Unplanned Component Failure: Inferior materials in critical components like rotors, bearings, and liners result in catastrophic failures.

How can you achieve a consistent, specgrade output while controlling the total cost of ownership? The solution requires a hammer mill engineered not just for power, but for precision, durability, and operational economy.

2. PRODUCT OVERVIEW

The ODM Harga Hammer Mill is a heavyduty industrial impact crusher designed for primary, secondary, or tertiary reduction of mediumhard to hard materials. Its operation is based on a highkineticenergy impact principle.

Operational Workflow:
1. Feed Intake: Material is fed via vibratory feeder or conveyor into the mill’s robust feed hopper.
2. Size Reduction: Material is struck by rapidly rotating hammers (mounted on a forged rotor), fragmenting it upon impact against the adjustable breaker plates.
3. Classification & Discharge: Crushed material passes through a screen grate of specified aperture size; correctly sized particles exit, while oversized pieces are retained for further impact.

Application Scope: Ideal for limestone, gypsum, coal, aggregates, demolition concrete, and certain industrial minerals.
Key Limitations: Not suitable for highly abrasive materials (e.g., silica sand) without specific alloy options, or for sticky, clayrich feeds that may cause screen clogging.

3. CORE FEATURES

Dynamic Rotor Balancing | Technical Basis: Computeraided dynamic balancing at operating RPM | Operational Benefit: Eliminates destructive vibration, extends bearing life by over 40% | ROI Impact: Reduces structural stress and maintenance intervals, lowering longterm repair costs.

Reversible Hammer System | Technical Basis: Symmetrical hammer design with multiple wear edges | Operational Benefit: Operators can reverse or rotate hammers to utilize all wear edges before changeout | ROI Impact: Increases service life of hammer sets by up to 100%, reducing part inventory frequency.

Modular Screen & Breaker Plate Design | Technical Basis: Segmented wear plates and quickchange screen cartridges | Operational Benefit: Change screen size or replace worn liners in under 2 hours vs. industry average of 46 | ROI Impact: Minimizes downtime during product changeovers or maintenance.

HeavyDuty Bearing Assembly | Technical Basis: Oversized spherical roller bearings with labyrinth seals and grease purging system | Operational Benefit: Withstands shock loads and prevents contaminant ingress in highdust environments | ROI Impact: Field data shows bearingrelated failures reduced by over 60% across a 5year period.

Direct Drive Coupling System | Technical Basis: Flexible coupling connecting motor directly to rotor shaft | Operational Benefit: Eliminates Vbelt drive losses and maintenance; transmits power at >98% efficiency | ROI Impact: Lowers energy consumption by approximately 57% compared to traditional beltdriven systems.

Smart Access & Safety Design | Technical Basis: Hydraulically assisted hinged housing with mechanical safety locks | Operational Benefit: Enables fast, safe access to crushing chamber for inspection and service without full disassembly | ROI Impact: Improves operator safety and reduces service labor hours by an estimated 30%.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard Benchmark | ODM Harga Hammer Mill Solution | Documented Advantage |
| : | : | : | : |
| Tonnage per kWh (Limestone) | 8 10 Tons/kWh (for comparable duty) | 11 13 Tons/kWh (sitedependent)| +15% to +25% Efficiency Gain |
| Mean Time Between Failure (Critical Bearings) | ~3,500 4,500 hours| >7,000 hours (with recommended protocol)| +60% Service Life Improvement |
| Screen Changeover Time (Full Set) | Average 46 hours| <2 hours with trained crew| ~60% Downtime Reduction |
| Wear Part Utilization (Hammers)| Singleuse or twoedge design| Four usable edges via rotation/reversal| Up to +100% Utilization |

5. TECHNICAL SPECIFICATIONS

Capacity Range: Models available from 50 TPH to over 400 TPH throughput capacity (dependent on material type & product size).
Power Requirements: Motor ratings from 200 kW up to 1250 kW. Voltage as per client specification (e.g., 380V/415V/6.6kV).
Material Specifications:
Rotor: Forged steel shaft with cast steel discs.
Hammers/Breaker Plates: Highchrome cast iron (HRC ≥58) standard; Manganese steel or tungsten carbide options available.
Housing/Casing: Fabricated from heavyduty steel plate with replaceable AR400 liner plates.
Physical Dimensions: Varies by model; typical footprint ranges from ~25m² to ~60m² including motor baseplate.
Environmental Operating Range: Designed for ambient temperatures from 20°C to +45°C. Dusttight construction meets IP54 ingress protection standards.

6. APPLICATION SCENARIOS

Aggregate Plant – Basalt Crushing

Challenge A quarry needed consistent 25mm aggregate but faced weekly downtime due to premature hammer wear in their existing mill.
Solution Implementation of an ODM Harga Hammer Mill equipped with tungsten carbidetipped hammers and the quickchange screen system.
Results Achieved consistent product gradation with hammer set life extended from ~10 days to ~45 days. Annual maintenance downtime reduced by an estimated 300 hours.

Cement Plant – Limestone PreCrushing

Challenge High energy costs per ton crushed were eroding plant margins; vibration issues also caused ancillary structural damage.
Solution Installation of a dynamically balanced ODM Harga model with direct drive coupling.
Results Specific power consumption improved by 18%. Measured vibration levels remained below ISO standards for two years postinstallation.

7. COMMERCIAL CONSIDERATIONS

Pricing is structured according to capacity class:
Standard Duty Series (<150 TPH): Base configuration focused on core reliability for smaller operations.
Heavy Duty Series (150300 TPH): Enhanced features standard including reversible hammers and hydraulic access systems—the most common tier for midsize plants.
Extra Heavy Duty Series (>300 TPH):) Fully customized solutions with premium alloy options and advanced monitoring systems.

Optional features include:
PLCbased automation packages
Online condition monitoring sensors
Special alloy wear packages
Custom feed chutes

Service packages range from basic commissioning support up to comprehensive annual maintenance contracts that guarantee parts availability within specified lead times. Financing options are available through partner institutions covering equipment leasing or purchase plans tailored over a period of time.

8. FAQ

Q1 Is the ODM Harga Hammer Mill compatible with my existing crushing circuit?
A1 The mill can be engineered to interface with most standard conveyor sizes and plant layouts provided feed size specifications are met; our engineering team reviews your P&ID diagrams as part of the presale assessment.

Q2 What is the expected impact on my plant's overall energy consumption?
A2 Industry testing demonstrates reductions in specific energy use between XY%, depending on material hardness; this typically results in measurable savings on monthly power costs when replacing older technology mills.

Q3 What are the commercial terms regarding delivery?
A3 Delivery terms are FCA our manufacturing facility unless otherwise negotiated under an EPC contract; lead times vary based on model complexity but typically range within YZ weeks after final design approval.

Q4 How does implementation affect ongoing operational staffing?
A4 The design prioritizes operator safety and ease of service; routine tasks like screen inspection require fewer personnel manhours compared to mills requiring manual bolt removal procedures

Q5 Are spare parts readily available?
A5 We maintain strategic inventories of critical wear parts including rotors bearings screens etc.; availability levels depend upon your selected service package tier ensuring minimal disruption should replacement be necessary

Q6 Can you provide performance guarantees?
A6 Yes we offer guaranteed performance metrics including throughput capacity product gradation curves maximum power draw etc.; these guarantees are formalized within our sales contract based upon agreed test protocols using representative feedstock samples