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Application
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Tunnel boring machines are widely used in railway, metro, road, water and underground infrastructure projects. Their chassis and backup systems operate under heavy loads, continuous duty, restricted maintenance access and exposure to water, slurry, dust and abrasive particles.
WSCS supplies polyurethane press-on tires, load wheels and guide rollers for tunnel boring machines, shield equipment and supporting transport systems. Standard and custom wheels can be developed from drawings, equipment data or used samples.
| Product | Main Function | Key Purchasing Information |
|---|---|---|
| TBM Press-on Tires | Fit onto an existing hub to carry heavy running loads | Outside diameter, width, steel-band bore and interference fit |
| Polyurethane Press-on Tyres | Combine a polyurethane tread with a cylindrical steel band | Series, load, tread thickness and running conditions |
| Heavy-duty Load Wheels | Support TBM chassis, gantries and transport equipment | Dynamic load, hub, bearing and wheel diameter |
| Polyurethane Guide Rollers | Control lateral movement and rail alignment | Rail profile, radial load, bearings and runout |
| Custom TBM Wheels | Match non-standard or discontinued equipment | Drawing, sample, operating data and order quantity |
Press-on tires and complete load wheels can support large structures distributed across multiple wheel positions. Diameter consistency, load sharing and resistance to long-term deformation are important when several wheels operate as one group.
Running and guide wheels on backup gantries can encounter rail joints, water, slurry and long low-speed cycles.
Load and guide wheels can also support material carriers and tunnel transport equipment where alignment and bearing protection are important.
| Operating Condition | Possible Problem | Wheel Design Priority |
|---|---|---|
| High static and dynamic loads | Compression, flat spots and core deformation | Diameter, width, hardness and core rigidity |
| Continuous low-speed operation | Heat and permanent deformation | Material resilience, tread thickness and duty cycle |
| Rail joints and uneven surfaces | Impact, vibration and tread chunking | Wheel diameter, tear resistance and profile |
| Water, slurry and bentonite | Material ageing, corrosion and bearing contamination | Hydrolysis resistance, sealing and core protection |
| Rock dust and abrasive particles | Cutting and accelerated wear | Abrasion, tear resistance and regular inspection |
| Multiple wheels in one group | Uneven load and irregular wear | Diameter consistency, runout and alignment |
| Option | Suitable When | Information Required |
|---|---|---|
| Press-on tire | The existing hub remains serviceable and only the tire is replaced | Steel-band inner diameter, width, hub size and required interference |
| Complete load wheel | The core, bearing or shaft connection also needs replacement | Complete wheel drawing, bore, bearing, flange and load |
| Guide roller | The wheel controls lateral position or follows a rail profile | Track profile, radial force, bearing and installation space |
| Reverse-engineered replacement | The original part is discontinued or no drawing is available | Used sample, equipment model, installation dimensions and failure history |
Identify the wheel type. Confirm whether the project requires a press-on tire, complete load wheel or guide roller.
Calculate the real wheel load. Include machine weight, working load, load distribution, impact and long stationary periods.
Confirm dimensions. Provide outside diameter, width, steel-band bore, hub dimensions, bearings, shaft or flange details.
Define the duty cycle. State normal speed, maximum speed, daily runtime, start-stop frequency and stationary loading time.
Describe the environment. Identify water, slurry, bentonite, dust, oil, chemicals and operating temperature.
Set precision requirements. Confirm outside-diameter tolerance, concentricity, radial runout and consistency within each wheel group.
Polyurethane can be formulated for different hardness, deformation, abrasion, tear resistance, heat and resistance to water or oil. Hardness alone does not determine service life.
Press-on tires use a steel band, while complete wheels may use steel or cast-iron cores with custom bearings, bores, keyways, flanges or bolt patterns.
Reliable polyurethane-to-metal bonding depends on cleaning, surface preparation, compatible bonding materials, casting and curing.
Outside diameter, width and tread thickness
Steel-band inner diameter, width and interference requirements
Polyurethane hardness and application-specific formulation
Steel, cast-iron or other suitable wheel cores
Bore, keyway, flange, bolt pattern, bearing and sealing structure
Flat, crowned, grooved or custom tread profiles
Hydrolysis, oil, tear and heat-performance requirements
Prototype, small-batch and repeat OEM production
▶Load capacity：From 6000kg to 30000kg
▶Diameter : From 250mm to 800mm
▶ Low-noise operation
▶ Low rolling resistance
▶ High dynamic load capacity
▶ High cut and tear propagation resistance
▶ lowest compression
▶ Excellent abrasion resistance
▶ Water and chemical resistance
Flat spots or excessive deformation: check load, wheel width, hardness, stationary time and temperature.
Cracking or chunking: inspect rail joints, abrasive debris, local overload and tread tear resistance.
Delamination: review steel-band preparation, corrosion, moisture, heat and core deformation.
Uneven wear: check load sharing, wheel diameter, rail alignment and bearing condition.
Bearing failure: review sealing, slurry entry, alignment and lubrication.
Inspection can include outside diameter, width, steel-band bore, hardness, concentricity, radial runout, core dimensions and the tread-to-metal interface. Project-specific or third-party testing can be discussed when required.
WSCS supports new TBM projects, replacement wheels and discontinued-part development. A worn sample should be supplied with equipment and operating data because its original dimensions may have changed.
A press-on tire is fitted to an existing hub. A complete wheel includes the tread, wheel core and required bearing or shaft connection.
They can be designed for wet conditions, but polyurethane formulation, steel protection, bearings and seals must be selected for the actual exposure.
Yes. The sample should be supplied with equipment details, installation measurements and operating conditions.
One-piece and small-batch projects can be evaluated according to tooling, steel-band or wheel-core processing and material requirements.
Send WSCS your drawing, sample, load, dimensions and tunnel operating conditions to identify an existing polyurethane press-on tire or develop a custom tunnel boring machine wheel.
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