WCHM Wood Crusher Hammer Mill

From branches and wood offcuts to finely ground biomass — made in Lebanon.

The Mechaniqua WCHM Series combines a cutting disc fitted with blades and a hammer-grinding system in one machine. The blades cut incoming branches and larger wood pieces, while the hammers reduce the material further before it passes through the installed screen.

This combined process allows the WCHM to produce material finer than conventional wood chips, making it suitable for wood-waste reduction and preparation for further biomass processing.

Available in seven sizes, with electric, gasoline, diesel and tractor PTO configurations, the WCHM serves farms, workshops, commercial wood processors and biomass producers.

Key Features

• Cutting and grinding in one machine: cutting blades perform primary size reduction, followed by hammer grinding.
• Replaceable screens: select the screen opening to suit the required material and application.
• Seven models: electric motor sizes from 4 kW to 55 kW.
• Multiple drive options: electric power, selected fuel engines or tractor PTO.
• Serviceable wear components: replaceable blades, hammers and screens.
• Manufactured in Lebanon: local support, servicing and spare parts from Mechaniqua.

How the WCHM Works

Processing stage	Function
1. Cutting	Blades mounted on the cutting disc cut branches and larger wood pieces into smaller sections.
2. Hammer grinding	Rotating hammers further reduce the material through impact.
3. Screening and discharge	Reduced material passes through the installed screen and exits the machine.

The screen influences the final particle size. Smaller openings generally produce finer material but reduce throughput. Particle shape and dimensions also depend on the wood’s fibre structure, moisture and operating conditions.

Suitable Materials

• Tree branches and pruning waste.
• Small logs within the selected model’s feed-size limits.
• Wood offcuts and appropriately sized timber pieces.
• Wood chips.
• Clean agricultural wood waste and similar woody biomass.

Material must fit safely through the inlet and remain within the machine’s operating limits. Remove nails, screws, stones and other foreign objects before processing.

The inlet opening is not the same as the recommended maximum branch diameter. Contact Mechaniqua before processing unusual, contaminated or treated materials.

Model Specifications

Model	Electric motor	Approximate production capacity*	Recommended maximum branch diameter*
WCHM250	4 kW	60–120 kg/h	30 mm
WCHM330	7.5 kW	120–250 kg/h	50 mm
WCHM420	11 kW	250–450 kg/h	70 mm
WCHM500	15 kW	350–650 kg/h	90 mm
WCHM600	22 kW	500–900 kg/h	110 mm
WCHM800	30 kW	700–1,200 kg/h	140 mm
WCHM1000	55 kW	1,200–2,200 kg/h	180 mm

Performance figures are approximate selection guidelines. Actual output depends on wood species, hardness, moisture, incoming dimensions, screen opening, feeding consistency, component condition and available drive power.

Maximum branch diameter represents an upper feed-size guideline, not continuous production at that diameter. Hard, dense, wet or irregular wood may require smaller feed sizes. Performance with engine or PTO drives must be confirmed for the selected configuration.

Screen Selection and Pellet Preparation

Select the screen according to the required output and the next processing stage.

Requirement	Screen-selection guidance
Finer ground material	Smaller openings, generally with reduced production capacity.
Coarser material	Larger openings, generally allowing higher throughput.
Pellet-machine feedstock	A 3 mm screen may be suitable where finely prepared material is required. Confirm compatibility with the pellet machine.

Grinding does not replace drying. Material moisture must be appropriate for the downstream process.

Electric Drive Options

Model	220V DOL¹	220V VFD	380V DOL	380V star-delta	380V VFD
WCHM250	✓	✓	✓	—	✓
WCHM330	—	—	✓	—	✓
WCHM420	—	—	✓	✓	✓
WCHM500	—	—	✓	✓	✓
WCHM600	—	—	—	✓	✓
WCHM800	—	—	—	✓	✓
WCHM1000	—	—	—	✓	✓

¹Motor type and supply requirements for the 220V DOL configuration are confirmed when ordering.

Choosing a Starting System

Starting system	Characteristics
DOL — Direct-on-Line	Simple starting arrangement with high starting current. Requires an electrical supply capable of accelerating the machine.
Star-Delta	Reduces initial starting current and starting torque. Requires a compatible motor and sufficient torque to accelerate the unloaded rotor.
VFD — Variable-Frequency Drive	Provides controlled acceleration and adjustable operating settings. Selected and configured according to the motor and machine requirements.

A VFD does not increase the motor’s rated power or replace the need for an adequately sized electricity supply. Machine speed must remain within the operating range specified by Mechaniqua.

Electrical Installation Guide

380V Three-Phase Versions

The table below provides preliminary installation planning values for DOL and star-delta configurations.

Cable examples assume copper conductors, PVC insulation, one ungrouped surface-clipped cable, approximately 30°C ambient temperature and a cable route of up to approximately 25 metres.

Model	Motor	Approximate full-load line current	Preliminary supply breaker²	Example supply cable³
WCHM250	4 kW	8.5 A	16 A	4G2.5 mm²
WCHM330	7.5 kW	15 A	25 A	4G4 mm²
WCHM420	11 kW	21 A	32 A	4G6 mm²
WCHM500	15 kW	28 A	40 A	4G10 mm²
WCHM600	22 kW	40 A	63 A	4G16 mm²
WCHM800	30 kW	54 A	80 A	4G25 mm²
WCHM1000	55 kW	99 A	125 A	4G50 mm²

²Supply-breaker ratings are preliminary candidates, not motor overload settings. Final selection must account for starting current, trip characteristics, fault-breaking capacity and coordination with the cable and motor protection.

³4G means three phase conductors plus protective earth. A neutral conductor must be added where required by the supplied control panel. These examples refer to the incoming machine supply, not the motor leads between a star-delta starter and its motor.

Final cable sizes and protection must be verified by a qualified electrician. Longer cable runs, enclosed installation, grouped cables, higher temperatures and voltage-drop requirements may require larger conductors. Installed motor and control-panel specifications take priority.

WCHM250 — 220V Single-Phase VFD Version

For locations without a 380V three-phase supply, the WCHM250 is available with a suitable VFD operating a three-phase motor from a 220V single-phase input.

Specification	Preliminary value
Motor power	4 kW
Supply input	220V single-phase
Starting system	VFD
Estimated full-load input current	Approximately 23–25 A; confirm against the selected drive
Preliminary supply breaker	32 A, subject to the VFD manufacturer’s requirements
Example supply cable	3G6 mm² copper under the installation assumptions above
Conductors	Line, neutral and protective earth

This configuration requires a dedicated supply and is not suitable for a standard 16 A household socket.

The 220V DOL version requires separate electrical sizing according to its installed motor.

VFD Supply and Motor Protection

For VFD-equipped machines, input cables and protective devices must be selected using the actual drive’s rated input current and manufacturer requirements. Motor current alone is insufficient to size the VFD supply circuit.

Motor overload protection must match the installed motor and starter arrangement. Maintain suitable earthing, isolation and ventilation around the motor and control panel.

Repeated overheating or operation above the motor’s permitted continuous current requires reduced feeding and investigation of the cause.

Generator and Solar Compatibility

Generator and solar-inverter compatibility must be assessed against:

• Supply voltage and number of phases.
• Continuous output capacity.
• Motor-starting capability and selected starter.
• Other equipment operating on the same supply.

Motor kW alone is not sufficient to select a generator or solar inverter. Provide Mechaniqua with the supply equipment specifications before ordering.

Gasoline and Diesel Versions

Fuel-powered configurations are available for smaller models where an adequate electrical supply is unavailable.

Model	Engine
WCHM250	6.5 hp gasoline
WCHM330	10 hp diesel
WCHM420	15 hp diesel

WCHM500 and larger models are available with electric or tractor PTO drive only.

Combustion engines must operate outdoors, away from enclosed working areas and building air intakes.

Tractor PTO Versions

Tractor PTO configurations are available across the WCHM range.

Model	Preliminary suggested tractor engine power*
WCHM250	15+ hp
WCHM330	20+ hp
WCHM420	25+ hp
WCHM500	30–35+ hp
WCHM600	45+ hp
WCHM800	60+ hp
WCHM1000	100+ hp

Tractor engine horsepower differs from available PTO horsepower. Final compatibility depends on available PTO power, operating speed, transmission ratio, material and required throughput.

PTO speed, shaft, coupling, mounting and guarding requirements are confirmed for the selected machine. Operate only at the PTO speed specified by Mechaniqua.

WCHM or WHM?

Feature	WCHM — Wood Crusher Hammer Mill	WHM — Wood Hammer Mill
Processing system	Cutting disc with blades and hammers	Hammer-grinding system
Typical incoming material	Branches, offcuts and larger wood pieces	Pre-sized wood chips and suitable reduced biomass
Main purpose	Primary cutting followed by grinding	Grinding material already reduced to a suitable feed size
Hammer arrangement	Combines hammers with the cutting system	More hammers for a comparable machine size

Choose WCHM when your material requires initial cutting before grinding. Choose WHM when the material is already appropriately sized for hammer milling.

Operation and Maintenance

• Start with the grinding chamber clear and allow the rotor to reach its specified operating speed.
• Feed material progressively and consistently.
• Adjust feeding to the material, screen opening and available power.
• Keep the screen and discharge path clear.
• Inspect blades, hammers, belts and bearings regularly.
• Follow the supplied lubrication and maintenance instructions.
• Keep guards fitted during operation.
• Stop, isolate and wait for the rotor to come to a complete standstill before opening, cleaning or servicing the machine.

Select Your WCHM

To help us recommend the appropriate model, provide:

• Material type, wood species and moisture condition.
• Maximum branch diameter and incoming dimensions.
• Required production capacity and final material size.
• Intended operating hours and downstream equipment.
• Available voltage, phases and electrical service capacity.
• Generator, solar-inverter or tractor specifications, where applicable.

Machine dimensions, weight, inlet dimensions, rotor speed, screen availability and included accessories are confirmed in the technical quotation for the selected configuration.

Contact Mechaniqua

Dhour Choueir, Lebanon
Phone / WhatsApp: +961 71 612071
Email: mechaniqua@gmail.com