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Description
Product Overview
QMH fast screw serves as a practical onsite solution for conveyor belt repair and belt splicing, widely used as an alternative to hot vulcanized splicing and patch work.
Mining, quarry, aggregate and material handling sites often face sudden belt damage: longitudinal tears, deep gouges, through holes, or local rubber loss. Traditional hot vulcanization calls for heavy vulcanizing presses, dry weather conditions and skilled crews, which can stretch downtime for hours or even daysdocumentli…. The QMH fast screw gets around these limits. You carry lightweight parts to the spot, finish repair or splice within roughly 2 hours, and bring your conveyor back online fast to cut production losses.
This fast screw system works across most common conveyor belt types, handles different belt thickness, and fits tight or hard to reach spaces where big vulcanizing gear cannot be set up.
Key Features
- Fits multiple belt thickness ranges. Works for nylon, polyester, PVC / PVG, chevron patterned belts, pipe belts, sidewall corrugated belts and steel cord conveyor belts.
- Repairs many common belt defects: long scratches, rips, full through holes, and areas with missing rubber cover.
- No vulcanizing machine or heating equipment required. Standard power drill is enough for field assembly.
- Fast onsite work: most repair or splice jobs wrap up within about 2 hours, minimising plant downtime and lost output.
- Low site requirements. Works under rain, snow, frost or icy conditions where hot vulcanisation cannot proceed properly.
- Needs little working space. Suitable for narrow tunnel, underground and confined conveyor layouts.
- Good overall mechanical performance: high tensile strength, cut resistant, retains rubber elasticity. Offers wear, heat, acid alkali and oil resistance. Custom build available for special working conditions.
- One piece integrated structure. No hinged joints. Prevents material spillage at the repair zone.
- Works well with standard belt rollers and belt scrapers / cleaners, no frequent scraper damage.
Selection Guidance
| Item | H400Belt Strength ≤ 400N | H650Belt Strength ≤ 650N | H1000Belt Strength ≤ 1000N | H1400Belt Strength ≤ 1400N | H2000Belt Strength ≤ 2000N |
| Carcass Thickness mm | 2-10 | 2-10 | 4-16 | 4-16 | 4-16 |
| Belt Strength N/mm | 500 | 650 | 1000 | 1400 | 1800 |
| Min. Pulley Dia. mm | 150 | 150 | 200 | 300 | 300 |
| Belt Availability | EP400 / EP500 | EP500 / EP650 | EP800 / EP1000 | EP1200 / EP1400 | EP1600 / EP1800 / EP2000 |
Match your fast screw setup according to real belt parameters on site:
- Screw length is determined by your actual conveyor belt thickness.
- Rubber compound should match your belt property: wear resistant, heat resistant, or acid alkali resistant grade as needed.
- Splicing length rule:
- For belt strength 600 N/mm: splicing length equals conveyor belt width.
- General reference: conveyor belt width ×1.06 = recommended splicing length.
- Custom screw length options are available for special belt specifications.
Tip: Always double check belt thickness and tension rating before ordering.Wrong size will shorten joint service life.
Typical Application Scenarios
Emergency belt repair, new belt onsite splicing, underground mine conveyors, quarry crushing lines, port bulk material handling, cement plant conveying systems.
FAQ
Q1: Do I need professional vulcanization technicians to install this fast screw?
No. Operators with basic mechanical skills can complete installation. You only need standard hand tools or cordless drills. Read through installation steps before starting onsite work.
Q2: Can it be installed in wet or rainy outdoor sites?
Yes. Unlike hot vulcanization which needs dry, stable ambient conditions, this fast screw system is not affected by rain, snow or frost. You can run emergency repair work even under poor weather.
Q3: What kind of belt damage can this product fix? Are there limits?
It handles large scratches, longitudinal tears, puncture holes and partial rubber loss. For belt carcass with massive fabric or steel cord failure, evaluate on site; full belt replacement may still be required.
Q4: Does the fast screw joint interfere with belt cleaners and rollers?
The integrated smooth design avoids protruding hinge parts. It is compatible with most standard rollers and belt scrapers. Still check scraper pressure after installation for long term running.
Q5: How long does one installation normally take?
Under proper site preparation, most splicing or major repair work finishes within around 2 hours. Actual time varies by belt width and damage size.
Q6: Can I get custom sizes for special belts?
Yes. We support custom screw length and special rubber formula for high temperature, oil soaked or heavy chemical exposure conditions. Send over your belt specs for quotation.
Q7: How does it compare against hot vulcanized splice?
Hot vulcanization gives maximum joint strength but demands heavy equipment, dry environment and long downtime. Fast screw trades minor joint strength loss for fast, flexible onsite repair, ideal for emergency fixes and sites with limited working space.
Products
Sidewall Conveyor Belt
QBF rubber specializes in designing and manufacturing high-quality steep incline conveyor belts for bulk material lifting across industries such as harbors, metallurgy, tunneling, power plants, chemicals, cement, and metro. As the only Chinese manufacturer using full European molds and standards, QBF rubber provides complete solutions covering belt selection, production, installation, commissioning, and trouble shooting.
Pocket Type Conveyor Belt
Developed from high angle sidewall belts and high capacity bucket elevators, the Pocket Type Conveyor Belt (Pocketlift) suits underground mining, tunnels, port handling and large volume silo feeding, with lifting heights up to 800 meters.
It handles ultra high lift, high throughput tasks beyond conventional high angle sidewall belts, realizing stable continuous bulk material transportation.
It handles ultra high lift, high throughput tasks beyond conventional high angle sidewall belts, realizing stable continuous bulk material transportation.
Rope-track Sidewall Conveyor Belt
RopeTrack corrugated sidewall steel cord conveyor belt for overhead cable conveying. ST10000 high strength, 25000 t/h throughput for mine, quarry & complex terrain long distance bulk transport. Custom engineering available.
Bucket Elevator Conveyor Belt
Bucket elevator conveyor belts are cost effective core components for vertical bulk material handling, supporting lifting heights over 100 meters. Reinforced with high grade tear resistant polyester canvas or optional steel cord anti tear layers for heavy duty use.
They deliver low elongation, high throughput and stable operation with easy maintenance, helping operators reduce downtime from belt failures and frequent replacements.
They deliver low elongation, high throughput and stable operation with easy maintenance, helping operators reduce downtime from belt failures and frequent replacements.
Pipe Conveyor Belt
Pipe conveyor belt (tubular conveyor belt) folds into a closed tube in operation, fully containing bulk materials to eliminate spillage and dust emissions while shielding cargo from external contamination.
Supporting sharp horizontal and vertical bends, it meets strict environmental requirements and helps plants remove redundant transfer points, favored by operators troubled by on site dust and leakage issues.
Supporting sharp horizontal and vertical bends, it meets strict environmental requirements and helps plants remove redundant transfer points, favored by operators troubled by on site dust and leakage issues.
Chevron Conveyor Belt
Chevron conveyor belt, fitted with raised chevron cleats, is designed for steep angle conveying to prevent bulk material sliding and fallback, an issue common for smooth flat belts.
Various chevron patterns are available for different slope demands. Widely used in mining, farming, construction and recycling, it maintains stable performance under harsh on site working conditions.
Various chevron patterns are available for different slope demands. Widely used in mining, farming, construction and recycling, it maintains stable performance under harsh on site working conditions.
Recent news
Sidewall Conveyor Belt Sagging Solutions: QBF rubber Free Zone Base Belt Design Extends Service Life by 30%
Sep 18, 2026
According to industry statistics, up to 80% of sidewall conveyor belt failures occur due to rigidity loss–induced sagging during operation. QBF rubberaddresses this root cause with an innovative “free zone ” base belt design, significantly extending the service life of sidewall conveyor belts.
What Is Belt Sagging and Why Does It Shorten Belt Life?
Under heavy load, especially on the return run, the base belt often sags due to insufficient transverse rigidity. This sagging triggers a chain of serious issues:
Stress concentration – Sagging causes abnormal flexing at the sidewall root as it passes over the drum, concentrating stress in a localized area.
Fatigue cracking – Repeated flexing leads to fatigue cracks at the sidewall root, which can develop into through-wall damage.
Baffle detachment – Vibration and deformation from sagging transfer to the baffle connection, accelerating adhesive aging and causing baffle loosening or separation.
Once sidewall tearing or baffle detachment occurs, the entire sidewall conveyor belt often fails prematurely. Therefore, solving the sagging problem is the key to extending belt service life.
Root Cause of Belt Sagging
The core cause of sagging lies in structural deficiencies of traditional base belt designs:
Insufficient transverse rigidity – Traditional base belts cannot maintain a flat profile under heavy loads or long-span conditions.
Unbuffered stress transfer – The sidewall-to-base belt connection lacks a flexible transition, so abnormal sagging stress directly impacts the sidewall root.
Accelerated fatigue accumulation – Repeated flexing at stress concentration points causes cracks to grow from micro to macro levels.
Understanding these causes makes it clear: simply increasing sidewall thickness or changing the rubber compound is a temporary fix. The solution must start with the base belt structure.
Solution: QBF rubber Free Zone Base Belt Design
QBF rubber introduces a “free zone ” base belt design to directly target the root cause of sagging.
How the free zone Works
Blocks stress transfer – The free zone acts as a stress buffer, absorbing and isolating abnormal sagging stress before it reaches the sidewall root.
Dissipates flexing energy – The flexible edge allows the base belt to adaptively deform as it passes over the drum, spreading concentrated flexing over a larger area.
Protects sidewall and baffles – By mitigating the extra load caused by sagging, the risk of fatigue tearing at the sidewall root is greatly reduced, and the baffle adhesive layer no longer suffers excessive vibration stress.
Key Advantages of the free zone Design
Advantage
Result
sidewall tear resistance
Eliminates stress concentration points; fatigue life extended by 2–3 times
Baffle detachment risk
Smoother operation; significantly slower adhesive aging
Overall belt service life
Comprehensive service life increased by 30% or more
QBF rubber’s Free Zone Base Belt design achieves a leap from “reacting to sagging consequences” to “eliminating the root cause of sagging.”
Summary: Eliminate Sagging at the Source for Longer Sidewall Belt Life
The sagging problem in heavy-duty sidewall conveyor belts originates in the base belt structure. QBF rubber’s free zone design solves this industry pain point by blocking stress transfer, dissipating flexing energy, and protecting both sidewall and baffles.
If you are experiencing frequent sagging, sidewall tearing, or baffle detachment with your sidewall conveyor belt, contact QBF rubber for professional technical support and customized solutions.
READ MORE
QBF Rubber Anti-stick Sidewall Belting Helps Shenzhen Tunnel Construction
Sep 18, 2026
The customized S400 B1800 TCS360 anti-stick Sidewall Belt — developed by QBF Rubber for the Shenzhen Tunnel Project — is now under installation! With a total length of 190m, this high-performance non-stick belt is set to play a crucial role in ensuring smooth and efficient tunnel construction.
More Than Just a Product – Full-Service Support!
Our after-sales team is fully committed to providing:
✔ Tailored installation plans
✔ Professional on-site guidance
✔ Hot vulcanization splicing services
✔ Comprehensive commissioning & operation support
Every step is meticulously handled to ensure flawless performance of the sidewall belt!
Technology + Service Facilitate Tunnel Construction
“This cooperation reflects QBF rubber’s R&D strength and service capability in the field of special conveyor belts,” the project manager said, “The application of the anti-stick sidewall conveyor belt will significantly improve the conveying efficiency, reduce the downtime for maintenance, and provide key support for the project to be pushed forward on schedule.”
In the future, QBF rubber will continue to focus on technological innovation and customer needs to provide more efficient and durable conveyor system solutions for global infrastructural projects.
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Mining Vertical Lifting System Solution: Tackling Continuous Conveying Challenges for Deep-Mine Operations
Sep 17, 2026
As mining operations go deeper, vertical lifting efficiency and safety have become major constraints on mine output. Designed for deep shafts, inclined shafts and complex terrain, our vertical lifting system works across 0 500 m vertical heights and supports steep angle, long distance material transport. Thanks to modular design, high throughput and full lifecycle services, it has gained wide attention in the mining material handling industry.
Three Core Solutions for Varied Lifting Applications
Our portfolio includes three main product lines to cover diverse vertical transport demands.
Steep Angle Sidewall Conveyor Solution
Engineered as an alternative to conventional mine cages, this solution handles vertical heights from 0 m to 500 m. In inclined shaft conditions, throughput can exceed 10 000 tons per hour. It overcomes the low efficiency, intermittent nature of cage hoisting and enables fast, continuous material transfer from underground to surface.
Pocket Type Vertical Lifting System
Optimized for high height, high volume tasks, this system is ideal for muck removal shaft main lines and blind shaft intermediate transfer. Proven in tunneling projects, it runs stably above 250 m lift height with capacities over 800 m³/h. It fills performance gaps under tight space conditions and can reach lifting heights over 500 m.
Long Distance Rope track Conveying System
Boasting single spans beyond 2 000 m, this system serves mountain and river valley sites. It reduces transfer points, cuts energy consumption and lowers overall maintenance costs for difficult terrain material haulage.
Full Chain “EPC+M+O” Service Model
Beyond equipment supply, Bairui provides a complete EPC+M+O service package:
E (Evaluation & Custom Design): Custom engineer conveyors and belts based on mine geology, production targets and existing site infrastructure.
P (Core Equipment Manufacturing): In house production of sidewall belts, lifting pockets and drive units for reliable quality and on time delivery.
C (Installation Guidance): On site technical support for installation and commissioning to ensure smooth startup.
M (Operation Management): Partial or full operational outsourcing to help mines hit production targets quickly.
O (Smart O&M): Condition monitoring and predictive maintenance platform for early fault warnings and optimized maintenance schedules.
Key Benefits vs Traditional Lifting Equipment
For shafts deeper than 500 m, traditional multi rope friction hoists suffer from short rope life, batch type loading and complex controls. The Steep Angle Sidewall Conveyor Solution fits compactly within limited shaft space. Its continuous output connects directly to processing plants or silos, eliminating intermediate stockpiles and re handling expenses.
In tunnel construction, the Pocket Type Vertical Lifting System features small turning radii and steep climbing performance. It has replaced imported equipment on multiple inclined shaft tunnel projects, delivering local manufactured cost savings. It requires minimal maintenance space and tolerates heavy dust and poor water conditions.
Field Proven Project Experience
Our solutions are operational across global metal mines, coal mines and large tunneling infrastructure. China’s first 255 m mine used vertical lifting system is now in service, boosting vertical conveying efficiency by over 10× with safe, energy saving and eco friendly operation.
September Global Exhibition Roadshow
This September, Bairuifu will attend four key mining expos across Central Asia, Africa and China to showcase our full vertical lifting portfolio and EPC+M+O service model. Industry professionals are welcome to visit our booths for technical exchanges.
Exhibition Schedule
Mining World Central Asia 2026
Sep 16 18, 2026｜Atakent International Exhibition Centre, Almaty | Booth: 11 307
Electra Mining Africa 2026
Sep 7 11, 2026｜Johannesburg Expo Centre | Booth: P10
The 28th China Mining Conference and Exhibitlon
Sep 10 12, 2026｜Meijiang Convention and Exhibition Center, Tianjin | Booth: N2 2607
The 20th Yulin International Coal and High-end Energy Chemical Industry Expo
Sep 13 15, 2026｜Yulin Convention & Exhibition Center| Booth: H342 / H335
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