The CONSTMACH CBC-800 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 higher material volumes moving without spillage or downtime.
Where the CBC-800 Sits in the Plant
Conveyors link every stage of the plant. The CBC-800 is well suited to main transfer lines, carrying the full output of a crusher or the combined flow of several screen fractions. With its 800 mm belt it handles a higher volume than the CBC-650 and CBC-500.
What It Handles and Belt Types
- The 800 mm belt suits higher flows of crushed stone, gravel, sand and fines on main transfer duties.
- 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-800 is a mid-range, higher-capacity unit; the CBC-650 and CBC-500 are narrower, while the CBC-1.000 and CBC-1.200 offer the widest belts for the heaviest transfer duties.
Components and Construction
The CBC-800 is built on a durable steel chassis with troughing idler sets that form the 800 mm belt into a deep carrying channel, and flat return idlers beneath. The driving and transfer drums are rubberized and vulcanized with diamond grooves for grip on the wider belt and carry tightening rings on the axis for tracking and tension. Bearings are double-row spherical roller bearings in SN-type split housings, replaceable without dismantling the shaft and able to tolerate the misalignment and shock of higher-volume aggregate handling. The drive is a reducer motor, or a motor and reducer with V-belt transmission, sized to the length, lift and tonnage 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 material at higher volumes.
- The RV-shaped rubber scraper keeps carry-back off the return belt, which matters more as belt width and material volume grow.
Selection Guidance
Choose the CBC-800 for main transfer lines carrying full crusher output or the combined flow of several screen fractions in medium-to-large plants. For lighter duties the CBC-650 or CBC-500 are more economical, while the highest tonnages and coarse primary flows call for the CBC-1.000 or CBC-1.200. Confirm belt length, lift and material bulk density when specifying the drive and belt grade.
