In industrial practice in 2026, the cost of an error in ordering conveyor belts has transformed from the cost of a roll to the total cost of line downtime. For Uzbek companies operating in extreme temperatures and high abrasive loads, correctly completing the questionnaire is the only way to guarantee the estimated service life of the equipment.
Based on the website section methodology belting.uz In "How We Select Conveyor Belts," we've systematized five fundamental parameters. This checklist is intended for chief engineers and purchasing managers whose goal is to minimize operational risks.
1. Kinematics and traction calculation: Frame power parameters
The choice of tape strength is based not on the number of layers, but on the nominal breaking force, measured in $N/mm$. The modern standard is fabric EP (polyester/nylon) — minimizes working elongation, which is critical for conveyors with limited travel of the tension station.
How to collect data:
- Load Definition: Calculate the maximum load per linear meter of belt when fully loaded. Consider the material density and system performance ($m^3/h$).
- Safety factor: For rubber-fabric belts it should be no less than 10:1 in relation to the maximum tension at start-up.
- Movement speed: Record the linear speed ($m/s$). High speeds (over 2.5 $m/s$) require increased alignment accuracy and the use of belts with improved lateral rigidity.
2. Geometric Compatibility: Layers vs. Drum Diameter
This is the most common point of defect occurrence. Every tape has a physical limit of flexibility. If the frame thickness exceeds the permissible limit for a given bending radius, critical shear stresses arise between the fabric layers.
Engineering audit of shafts:
Before creating the specifications, it is necessary to measure the diameter of the drive and tension drums. When using 3-ply EP-630 tape, the minimum drum diameter must be no less than 400 mmExceeding the ply density with a small shaft diameter is guaranteed to lead to internal delamination ("blistering") of the web within the first quarter of operation.
| Number of carcass layers (EP) | Min. drive drum diameter (mm) |
| 2 layers | 250 – 315 |
| 3 layers | 400 – 500 |
| 4 layers | 630 – 800 |
3. Track profile: Inclination angle and gravitational shift
Conveying at an angle requires precise determination of the coefficient of friction. Smooth rubber belts maintain their effectiveness at angles up to 15–18° (depending on the humidity and fraction of the cargo).
Measurement method and solution:
- Tools: Use a digital inclinometer to record the angle of the conveyor frame.
- Choice of execution: If the angle exceeds 18°, it is necessary to move on chevron tape With a profile height of 16, 25, or 32 mm. Attempting to compensate for load slippage on a smooth belt by over-tensioning will only lead to joint failure and wear of the bearing assemblies.
4. Thermodynamic and chemical operating conditions
In Uzbekistan's climate, ambient temperature is merely a background factor. The actual temperature of the cargo in the contact zone and its chemical inertness are critical.
- Temperature conditions: If the material (clinker, agglomerate, fertilizers) at the input has a temperature higher than +60°C, regular rubber is subject to accelerated aging (hardening and cracking). The specifications must specify the heat resistance classes. 2T2 (up to +150°C) or 2T3 (up to +200°C).
- Chemical aggressiveness: The presence of vegetable oils, animal fats or petroleum products in raw materials requires the use of marking tapes MS (oil-resistant)In such an environment, ordinary rubber swells, losing adhesion to the frame, which leads to "wave" deformation along the entire length.
5. Configuration of the facings and abrasive index
The thickness of the rubber "jacket" (e.g., 6+2 mm) should be based on the abrasiveness of the load. At belting.uz, we focus on the DIN abrasion index.
- For abrasives (crushed stone, ore): Rubber with abrasion resistance of no more than 90–120 $mm^3$ is required.
- Frame protection: If the return conveyor area is subject to heavy dust, it is recommended to increase the thickness of the bottom (non-working) cover to 3-4 mm. This will create the necessary "damper" between the frame fabric and the rollers, preventing premature wear of the cord.
Resume for specialists
An error-free order isn't about searching for the "cheapest belt," but about creating a technically sound specification. Properly collecting data on these five points allows Belting Rezina engineers to develop a solution that maximizes the technical utilization rate (TUR) of your equipment.
Over 20 years of experience, we've learned that 15 minutes spent measuring a drum's diameter or cargo's temperature saves hundreds of hours of work and millions of dollars in future operating losses.
Is your specification ready for review?
You can submit the collected data to our technical specialists using the form on the belting.uz website. We will conduct an expert audit of your specifications and propose the optimal belt design based on the physics of your production process.