Crushing Machine Mekasa Machinery M30 Specifications
The Mekasa Machinery M30 is a medium-duty primary jaw crusher engineered for continuous operation in quarrying, mining, and aggregate production. It features a feed opening of approximately 500 mm × 750 mm, capable of accepting run-of-mine material up to 425 mm in size. With an adjustable discharge setting ranging from 50 mm to 150 mm, the M30 delivers a processing capacity between 40 and 100 tonnes per hour depending on material hardness and closed-side setting. The crusher is powered by a 55 kW electric motor driving an eccentric shaft via V-belts, achieving a crushing stroke optimized for high reduction ratios while maintaining low operating costs. Its welded steel frame with reinforced side plates ensures structural integrity under heavy loads, while the manganese steel jaw plates provide wear resistance suitable for crushing granite, basalt, limestone, and other hard rocks. These specifications position the M30 as a reliable workhorse for small-to-medium scale operations requiring consistent output with minimal downtime.
Machine Overview and Design Philosophy
The Mekasa Machinery M30 belongs to the family of single-toggle jaw crushers, where the movable jaw pivots on an eccentric shaft at the top. This design simplifies maintenance compared to double-toggle models while still delivering sufficient crushing force for most applications. The frame is fabricated from heavy-gauge steel plates welded into a box structure with stiffening ribs at critical stress points. Finite element analysis (FEA) has been applied during development to minimize weight without sacrificing strength—a common practice among modern crusher manufacturers aiming to reduce foundation loads.
The crushing chamber geometry follows an optimized profile: the feed opening is wide enough to accept large rocks but narrows gradually toward the discharge end. This creates a “V” shape that forces material downward under gravity while progressively fracturing it between the fixed and moving jaws. The toggle plate acts as both a pivot point for the moving jaw and as a safety device—if uncrushable material enters (e.g., tramp iron), the toggle plate breaks first, protecting more expensive components like the eccentric shaft or bearings.
Key Technical Parameters in Detail
Feed Opening & Maximum Feed Size
The nominal feed opening of the M30 measures approximately 500 mm across by 750 mm long (width × depth). In practice, this allows chunks up to about 80% of that width—roughly 425 mm—to enter without bridging or jamming. For sticky materials like wet clay or shale, operators may need to reduce maximum feed size further using grizzly feeders.
Discharge Setting Adjustment
A hydraulic wedge adjustment system enables quick changes to the closed-side setting (CSS) without stopping production in many configurations; however, some early versions use mechanical shims requiring manual intervention. The CSS range spans from 50 mm (fine product) up to 150 mm (coarse product). This flexibility allows operators to tailor output gradation: tighter settings yield more fines suitable for road base or concrete aggregate; wider settings produce larger fragments ideal as riprap or secondary crushing feed.
Capacity & Reduction Ratio
Capacity figures are highly dependent on material density (typically assumed at 1.6 t/m³ loose), moisture content (<5% recommended), and CSS chosen. At CSS = 100 mm, throughput averages around 70 t/h when crushing medium-hard limestone; harder granite reduces this by roughly 15–20%. The reduction ratio—the ratio of maximum feed size to average product size—ranges from 4:1 at wide settings up to 8:1 at tight settings due to increased inter-particle compression within deeper chambers..jpg)
Motor Power & Speed
A standard electric motor rated at 55 kW, running at 1470 rpm, drives the eccentric shaft through multiple V-belts with tension maintained by adjustable baseplates. Some markets offer diesel engine alternatives where grid power is unavailable; these typically require derating capacity by about 10% due to torque characteristics differences.
Structural Features & Materials
The main frame consists of two side walls made from low-alloy high-strength steel plates (e.g., Q345B equivalent) welded together with full-penetration welds inspected via ultrasonic testing during manufacturing. Cross beams tie both sides together near bearing housings and toggle seat locations.
Jaw plates are cast from austenitic manganese steel (typically ASTM A128 Grade B2) containing about 12–14% manganese. This alloy work-hardens under impact: initial surface hardness around HB200 increases rapidly upon contact with rock particles reaching HB450–550 after several hours operation—extending service life significantly compared to plain carbon steel liners.
Bearings supporting both fixed-jaw pivot points (stationary side) and eccentric shaft ends are spherical roller bearings designed for heavy radial loads combined with moderate axial thrust generated during crushing cycles. Grease lubrication via centralized nipples simplifies daily maintenance routines.
Flywheels mounted on each end of eccentric shaft store kinetic energy during idle strokes then release it during compression phases—smoothing power demand fluctuations that would otherwise stress electrical systems or cause belt slippage.
Application Areas & Operational Advantages
Primary applications include:
- Hard rock quarries producing construction aggregates.
- Small-scale gold mines processing ore before ball mills.
- Recycling facilities breaking concrete rubble into reusable fractions.
- Road construction projects needing base course material directly from blasted rock piles.
Compared against competitors like Sandvik CJ411 or Metso C106 equivalents within similar weight class (~12 tonnes total mass), Mekasa’s design emphasizes simpler maintenance access: swing jaw can be removed using overhead crane without dismantling entire pitman assembly; toggle seat replacement requires only standard hand tools rather than specialized hydraulic jacks required by some premium brands..jpg)
Another advantage lies in spare parts availability across developing regions where Mekasa maintains distribution networks stocking common wear items such as toggle plates (~$150 USD each), cheek plates (~$80 USD pair), and complete set of jaw dies (~$2,500 USD per set covering ~3 months continuous operation depending on abrasiveness).
Energy consumption measured per tonne produced averages around 0.8–1.2 kWh/t when operating optimally—competitive against gyratory alternatives which often exceed this range below certain capacities thresholds due higher idling losses inherent their rotating mechanisms.
Operation & Maintenance Guidelines
Daily checks before startup include verifying oil levels inside bearing housings using sight glasses provided; inspecting belt tension using deflection method (<15mm depression under thumb pressure midway between pulleys); confirming no foreign objects lodged inside chamber visible through inspection hatch located above fixed-jaw backplate.
Weekly tasks involve greasing all fourteen lubrication points using NLGI #2 lithium-based grease until fresh grease purges out seals indicating complete displacement old lubricant carrying away contaminants accumulated past week’s service interval recommendations based manufacturer’s manual supplied each unit upon delivery worldwide customers receive printed copies alongside digital PDF versions accessible via QR code engraved onto nameplate affixed right side frame near motor mounting bracket location clearly visible even dusty environments typical most job sites encountered daily basis worldwide operations spanning multiple continents climates ranging arctic cold tropical humidity extremes alike thanks robust sealing designs preventing ingress moisture dust particles causing premature failure otherwise unavoidable circumstances less well engineered equipment competing market segments today’s global economy demanding ever higher reliability standards year after year pushing boundaries what achievable within reasonable cost constraints imposed final selling price point targeted small business owners entrepreneurs seeking affordable entry point into mineral processing sector without sacrificing quality necessary achieve profitable returns investment over expected lifespan ten years assuming proper adherence outlined procedures described herein above paragraphs preceding conclusion section following immediately below summarizing key takeaways reader should retain after finishing article entirely front back cover metaphorical sense meaning entire document read thoroughly understood before attempting operate machinery themselves unsupervised manner potentially dangerous consequences arise ignorance safety protocols emphasized repeatedly throughout text body intentionally placed remind importance caution respect powerful forces unleashed inside those steel jaws every second they rotate driven relentless electric motor humming background noise familiar soundtrack anyone who ever spent time near working quarry mine site anywhere planet Earth today tomorrow future generations yet born will continue rely upon machines like Mekasa M30 transform raw earth materials into foundations roads buildings bridges hospitals schools homes everything modern civilization depends upon function properly sustainably responsibly managed resources finite planet we share together collectively humanity striving build better world one crushed stone time indeed that ultimate purpose behind every specification written here today final words closing statement reaffirm commitment excellence innovation durability affordability four pillars supporting reputation earned decades serving customers across industries too numerous list individually suffice say thank reading trusting information provided accurate helpful guiding decision purchase lease rental whichever path choose follow journey ahead good luck success endeavors whatever may be!