The CONSTMACH JS-3 is the highest-capacity model of the JS series of mobile jaw and impact crushing plants, combining a CJC-110 primary jaw crusher and a CSI-1215 secondary impact crusher on two wheeled chassis. The sections below summarise the materials it is intended for, the products it makes, typical industries, how a jaw-and-impact plant compares with a jaw-and-cone plant, wear-part and maintenance considerations, and how the plant is integrated as a circuit.
Suitable Materials
The JS-3 is configured for medium-hardness, lower-abrasion stone. Impact crushers are generally applied to less abrasive feed than cone crushers, so highly abrasive, high-silica rock is outside the intended range for this plant type.
- Limestone
- Riverstone
- Dolomite
- Basalt within the stated feed range
End Products
The plant is designed to produce several graded fractions in a single pass, and the impact crushing stage typically yields a cubical particle shape and a relatively high fines content.
- Three or four different fractions simultaneously
- Aggregate sizes for concrete and asphalt production
- Base and sub-base material for road construction
Typical Industries
- Large aggregate and quarrying operations
- Ready-mixed concrete production
- Road and infrastructure construction
- Contractors requiring a high-capacity relocatable crushing circuit
Jaw-and-Impact Versus Jaw-and-Cone
The secondary crusher type is the main selection factor. A jaw-and-impact plant such as the JS-3 suits medium-hard, less-abrasive material and emphasises cubical shape and fines generation. A jaw-and-cone plant (CONSTMACH JC series) or a jaw-cone-VSI plant (JCV series) is configured for harder, more abrasive rock such as granite and basalt, where cone crushing reduces wear-part consumption compared with impact crushing.
Wear Parts and Maintenance
The principal wear components reflect the two crushing principles in the plant.
- Jaw crusher: fixed and moving jaw plates (compression wear)
- Impact crusher: rotor blow bars and breaker (apron) plates (impact wear)
- Screen media on the three-deck vibrating screen
- Conveyor belts and idlers
Because impact wear parts are consumed faster on abrasive feed, matching the feed material to the plant's intended hardness range is an important maintenance consideration on a high-throughput plant.
Comparison Within the Js Series
The JS-3 is the largest of the three JS models, offering the highest capacity and the largest feed opening in the series, above the JS-1 and JS-2. Model selection is driven by required throughput and the largest expected feed size.
Plant Integration
The JS-3 functions as a complete two-stage crushing and screening circuit across two chassis. The first chassis handles feeding and primary jaw crushing; the second handles secondary impact crushing, screening, oversize return and product stockpiling, with PLC automation, a remote controller and a dust-removal system.
