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Langyi ESD TPR Thread Stem Casters with Total Lock are designed for mobile equipment used in electronics manufacturing, testing, assembly and other environments where controlled electrostatic discharge is required.
The caster combines an ESD/anti-static TPR tread, PP wheel core, threaded stem mounting and a total-lock mechanism that secures both wheel rotation and swivel movement when equipment needs to remain stationary.
Available in 2.5-inch, 3-inch, 4-inch and 5-inch sizes, the series supports load capacities from 80 kg to 140 kg per caster depending on wheel diameter.
JZC7147-B
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The caster uses a specially formulated TPR tread designed for applications where static charge needs to be controlled during equipment movement.
This makes the caster suitable for mobile equipment carrying or supporting:
Electronic components
Circuit boards
Test instruments
Measuring equipment
Semiconductor-related materials
ESD-sensitive assemblies
The exact electrical resistance level should be confirmed according to the selected model, test method and customer's ESD control requirements.
For regulated ESD environments, the complete cart or equipment system should be tested after installation.
The total-lock mechanism is designed to lock both:
Wheel rotation
Swivel movement
This allows mobile equipment to be repositioned when necessary and then held securely in place during assembly, testing or maintenance work.
Total lock is particularly useful for:
Mobile workstations
Electronics assembly carts
Instrument stands
Test equipment
Component handling trolleys
The threaded stem provides a compact mounting solution for equipment designed with a matching threaded connection.
Compared with plate-mounted casters, thread stem installation requires less mounting surface area and can be suitable for tubular frames, workstations and equipment bases with integrated threaded holes.
Before ordering, confirm:
Stem diameter
Thread pitch
Stem length
Installation depth
Available clearance
For replacement projects, an existing caster sample or mounting drawing can also be provided.
| Wheel |
| Color : Grey |
| Hardness: 65-70 Shore A |
| Wheel core : PP |
| Wheel tread : TPR |
| Conductive ：10^3-10^5 (332-0G) |
| Anti-static ：10^8-10^10 (332-0G) |
| Specification | Details |
|---|---|
| Product Type | ESD / Anti-Static Industrial Caster |
| Mounting Type | Thread Stem |
| Lock Type | Total Lock |
| Wheel Tread | TPR |
| Wheel Core | PP |
| Wheel Color | Grey |
| Tread Hardness | 65–70 Shore A |
| Wheel Sizes | 2.5" / 3" / 4" / 5" |
| Wheel Diameter | 63 / 75 / 100 / 125 mm |
| Tread Width | 32 mm |
| Load Height | 92 / 105 / 130 / 158 mm |
| Load Capacity | 80 / 100 / 120 / 140 kg |
| Electrical Function | ESD / Anti-Static Options |
| Application | ESD-Sensitive Mobile Equipment |
| Stem Specification | Confirm According to Equipment |
| Customization | Size / Stem / ESD Requirement / Configuration |
| Model | Wheel Material | Wheel Dia | Tread Width | Load Height | Plate Size | Plate Size | Hole Size | Load Capacity |
| 301ZN-010-63-333-2G | ESD/ AS TPR | 63 (2.5") | 32 | 92 | 96*66 | 75*45 | 8.5 | 80 |
| 301ZN-010-75-333-2G | ESD/ AS TPR | 75(3") | 32 | 105 | 96*66 | 75*45 | 8.5 | 100 |
| 301ZN-010-100-333-2G | ESD/ AS TPR | 100(4") | 32 | 130 | 96*66 | 75*45 | 8.5 | 120 |
| 301ZN-010-125-333-2G | ESD/ AS TPR | 125(5") | 32 | 158 | 96*66 | 75*45 | 8.5 | 140 |
| Model | Wheel Material | Wheel Dia | Tread Width | Load Height | Plate Size | Plate Size | Hole Size | Load Capacity |
| 301ZN-022-63-333-2G | ESD/ AS TPR | 63 (2.5") | 32 | 92 | 96*66 | 75*45 | 8.5 | 80 |
| 301ZN-022-75-333-2G | ESD/ AS TPR | 75(3") | 32 | 105 | 96*66 | 75*45 | 8.5 | 100 |
| 301ZN-022-100-333-2G | ESD/ AS TPR | 100(4") | 32 | 130 | 96*66 | 75*45 | 8.5 | 120 |
| 301ZN-022-125-333-2G | ESD/ AS TPR | 125(5") | 32 | 158 | 96*66 | 75*45 | 8.5 | 140 |
Electrical resistance requirements should be confirmed according to the customer's ESD control plan and applicable test standard.
| Wheel Size | Diameter | Tread Width | Load Height | Load Capacity |
|---|---|---|---|---|
| 2.5" | 63 mm | 32 mm | 92 mm | 80 kg |
| 3" | 75 mm | 32 mm | 105 mm | 100 kg |
| 4" | 100 mm | 32 mm | 130 mm | 120 kg |
| 5" | 125 mm | 32 mm | 158 mm | 140 kg |
The compact 2.5-inch model is suitable for lower mobile equipment and lighter ESD-sensitive carts.
Rated capacity: 80 kg per caster.
The 3-inch version provides a balance between compact installation height and medium-duty capacity.
Rated capacity: 100 kg per caster.
The 4-inch model supports higher equipment loads while maintaining good maneuverability.
Rated capacity: 120 kg per caster.
The 5-inch model provides the highest capacity in this series and easier movement across floor joints and minor surface irregularities.
Rated capacity: 140 kg per caster.
When ordinary caster wheels roll across a floor, movement and contact between materials can contribute to static charge buildup.
For equipment carrying sensitive electronics, uncontrolled discharge may affect components or interfere with ESD protection procedures.
An ESD caster provides a controlled path for charge dissipation as part of the complete equipment grounding system.
However, the caster should not be treated as an isolated ESD solution.
Effective electrostatic control also depends on:
Equipment frame conductivity
Caster mounting connection
Floor conductivity
Grounding system
Wheel cleanliness
Environmental conditions
For this reason, completed mobile equipment should be tested according to the user's ESD management requirements after caster installation.
The TPR tread provides a practical combination of mobility and floor-friendly performance for indoor industrial applications.
Compared with harder wheel materials, TPR can help provide:
Lower rolling noise
Reduced floor marking
Better cushioning
Smooth movement on epoxy and other finished floors
Comfortable manual operation
This makes the caster particularly suitable for electronics production areas, laboratories and precision equipment environments where both ESD performance and controlled mobility are important.
Suitable for mobile carts, workstations and racks used to move electronic parts and assemblies between production processes.
Can be used on carts carrying printed circuit boards and related components within an ESD-controlled production environment.
Suitable for mobile equipment used where electrostatic discharge control forms part of the facility's handling procedure.
Total-lock functionality allows measuring instruments and test systems to be moved into position and then stabilized during use.
Thread stem mounting makes the caster suitable for compatible workstation frames and equipment bases where compact installation is required.
The grey TPR tread and total-lock structure can also suit compatible mobile laboratory and technical equipment where ESD control is required.
Langyi offers both thread stem and plate-mounted ESD caster configurations.
Equipment already has threaded mounting holes
Installation space is limited
A compact mounting structure is preferred
The caster needs to attach directly to a frame or leg
Equipment has a flat mounting base
Bolt-on installation is preferred
A larger mounting surface is available
The mounting style should be selected according to the equipment structure rather than only the caster load capacity.
A swivel caster improves maneuverability, but mobile equipment also needs stability when parked.
A total-lock caster provides greater positioning control than a simple wheel brake because both the wheel and swivel function are locked.
This is useful when operators need to:
Assemble components on a mobile workstation
Use sensitive measuring equipment
Perform inspection tasks
Load or unload parts
Keep equipment stationary during operation
The lock should always be engaged only after the equipment has stopped moving.
The load rating shown for each caster is the individual caster capacity.
When calculating a complete cart or equipment system, avoid simply multiplying the caster rating by the number of wheels.
Actual load distribution can change because of:
Uneven floors
Equipment weight distribution
Turning
Dynamic movement
Floor joints
Impacts
A suitable safety margin should therefore be included.
For selection support, provide:
Equipment weight
Maximum payload
Number of casters
Floor type
Required wheel size
Movement frequency
ESD wheel performance can be affected by dirt, dust and contamination on the tread surface.
For equipment operating in ESD-controlled areas:
Keep wheel surfaces clean
Avoid coating the tread with insulating substances
Inspect the mounting connection regularly
Check the total-lock function
Include caster resistance in periodic equipment ESD verification where required
Cleaning materials should also be selected according to the TPR material and facility requirements.
Langyi supports customized caster requirements for equipment manufacturers and industrial projects.
Available customization can include:
Thread stem diameter
Thread pitch
Stem length
Wheel size
ESD / anti-static requirement
Brake configuration
Caster combination
OEM labeling and packaging
For customized projects, customers can provide an equipment drawing, existing caster sample or technical specification for review.
For faster product selection, please provide:
Wheel Size: 2.5", 3", 4" or 5"
Required Load Capacity: per caster or complete equipment
Stem Diameter: according to equipment
Thread Pitch: metric or other requirement
Stem Length: required installation length
Equipment Type: cart, workstation, rack or instrument
ESD Requirement: applicable resistance or facility standard
Floor Type: epoxy, PVC, concrete or other
Required Quantity: project or OEM volume
If a specific resistance requirement applies, please include the relevant test standard or customer specification.
Langyi manufactures casters, trolleys and material handling equipment for industrial and commercial applications.
For ESD-sensitive equipment, Langyi provides different caster sizes, mounting structures and locking configurations to match customer equipment requirements.
The combination of TPR tread, threaded mounting and total lock makes this series particularly suitable for mobile equipment that requires both electrostatic control and stable positioning.
An ESD caster is designed to provide an electrical discharge path through the wheel rather than allowing static charge to accumulate on mobile equipment.
The complete equipment system must still provide continuous conductivity to achieve the required ESD performance.
According to the current product specification, the series includes 2.5", 3", 4" and 5" wheel options.
Total lock means the brake secures both wheel rotation and swivel movement, helping keep the equipment stationary after positioning.
They can be considered for ESD-sensitive equipment, but suitability for a specific Electrostatic Protected Area depends on the required resistance range, test method and complete equipment system.
Customers should verify the finished assembly according to their ESD control requirements.
Stem diameter, pitch and length should be selected according to the equipment mounting interface. Please provide your required dimensions when requesting a quotation.
Yes. Dust or insulating contamination on the wheel surface can affect conductivity. Regular cleaning and periodic ESD testing are recommended where required by the facility's control program.
For ESD-sensitive carts, workstations, racks or mobile testing equipment, provide Langyi with your required wheel size, load, thread specification and ESD requirements.
Langyi can recommend a suitable 2.5" & 5" ESD TPR Thread Stem Casters with Total Lock for your equipment.
