The CONSTMACH CBC-650 belt conveyor is a material-transport machine within a crushing and screening or concrete batching plant. Rather than processing material, it moves it continuously between machines and out to stockpile. Understanding where it fits in the flowsheet, the belt and component choices, the incline it can handle, and its maintenance helps operators keep material moving without spillage or downtime.
Where the CBC-650 Sits in the Plant
Conveyors link every stage of the plant. The CBC-650 can carry material from a feeder to a crusher, from a crusher to a screen, from a screen deck to a stockpile, or as a bypass conveyor for scalped fines. With its 650 mm belt it handles a moderate flow, a step up from the narrow CBC-500.
What It Handles and Belt Types
- The 650 mm belt suits moderate flows of crushed stone, gravel, sand and fines.
- A smooth rubber belt is used on horizontal and gently inclined runs; a ribbed belt is used on steeper inclines to prevent roll-back.
- A 4-ply (4 tarpaulin) belt is fitted as standard, with the grade selected for the material and conditions.
Incline Limits
- With a smooth belt, conveyors are generally kept within roughly 18-20 degrees before material begins to slip back.
- A ribbed or chevron belt extends the workable incline beyond that of a smooth belt.
- The exact limit depends on material type, particle size and moisture; steeper lifts require belt and drum selection accordingly.
Maintenance
- Keep the belt tracked and correctly tensioned using the drum tightening rings.
- Inspect the RV-shaped rubber scraper and replace it when worn to control carry-back and spillage.
- Lubricate the SN-housed spherical roller bearings and check the support rollers for free rotation.
- Inspect drum lagging, the V-belt or reducer drive, and ensure walking platforms and emergency stops are functional.
Comparison With Alternatives
Against screw or chain conveyors, a belt conveyor moves abrasive aggregate over longer distances with lower wear and energy use, though it is less suited to steep vertical lifts. Within the CONSTMACH range the CBC-650 sits above the CBC-500; for higher capacities the CBC-800, CBC-1.000 and CBC-1.200 offer progressively wider belts.
Components and Construction
The CBC-650 is built on a durable steel chassis with troughing idler sets on the carrying side and flat return idlers beneath. The driving and transfer drums are rubberized and vulcanized with diamond grooves for grip and carry tightening rings on the axis for tracking and tension. Bearings are double-row spherical roller bearings in SN-type split housings, which can be replaced without dismantling the shaft and tolerate the misalignment and shock of aggregate handling. The drive is a reducer motor, or a motor and reducer with V-belt transmission, sized to the length and lift of the run.
Safety and Optional Features
- Walking platforms run alongside the conveyor for safe inspection and maintenance access.
- Emergency stop buttons allow the belt to be halted instantly from along its length.
- An optional cover reduces dust emission when handling dry, dusty material.
- The RV-shaped rubber scraper keeps carry-back off the return belt, protecting idlers and reducing spillage.
Selection Guidance
Choose the CBC-650 when the flow is moderate but exceeds what a 500 mm belt handles comfortably, such as transferring a larger fraction or the output of a small line. For full crusher output or combined flows in larger plants, step up to the CBC-800 or wider. Belt length, lift and material bulk density should be confirmed when specifying the drive and belt grade so the conveyor neither slips nor runs overloaded.
