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Langyi Waterproof Thread Stem Industrial Casters with PU Bearings are designed for medium-duty carts, trolleys and mobile equipment used in industrial and material handling environments.
Available in 3-inch, 4-inch and 5-inch sizes, the series combines a compact threaded stem mounting structure with a PU bearing configuration for smooth caster movement and reliable daily operation.
Depending on wheel size, the rated load capacity ranges from 110 kg to 140 kg per caster. Multiple wheel materials and colors are available to meet different equipment, floor and OEM requirements.
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This model belongs to Langyi's waterproof medium-duty caster series, but its key difference from the standard thread stem version is the PU bearing configuration.
For buyers comparing similar caster models, it is important to distinguish between:
Wheel material
Bearing or internal rolling structure
Thread stem mounting
Waterproof configuration
Wheel diameter
Load capacity
These features affect different aspects of caster performance and should not be treated as the same specification.
The PU bearing configuration is designed for smooth movement while helping reduce direct exposure of the internal rolling area to moisture and contaminants during normal industrial use.
This makes the caster suitable for applications where equipment may be used in damp working areas or subject to routine cleaning.
The bearing configuration can provide practical advantages such as:
Smooth swivel movement
Reduced maintenance requirements under normal use
Better suitability for damp environments
Stable operation for frequently moved equipment
For applications involving continuous water immersion, aggressive chemicals, high-pressure washing or corrosive liquids, the complete caster specification should be reviewed before selection.
The threaded stem provides a compact mounting solution for equipment designed with a compatible threaded connection.
It is suitable for carts and mobile equipment where a large top plate is unnecessary or where installation space is limited.
Before ordering, buyers should confirm:
Stem diameter
Thread pitch
Stem length
Installation depth
Available mounting clearance
The threaded stem must match the equipment connection accurately to ensure correct installation.
For replacement projects, customers can provide an existing caster sample, drawing or mounting dimensions.
| Specification | Options / Data |
|---|---|
| Product Type | Waterproof Thread Stem Industrial Caster |
| Key Configuration | PU Bearing |
| Wheel Material | TPR / PU / PVC / PP |
| Available Colors | Orange / Red / Black / Green / White |
| Wheel Size | 3" / 4" / 5" |
| Wheel Diameter | 75 / 100 / 125 mm |
| Tread Width | 32 mm |
| Load Height | 105 / 130 / 158 mm |
| Load Capacity | 110 / 125 / 140 kg |
| Mounting Type | Thread Stem |
| Duty Class | Medium Duty |
| Swivel Structure | Double Ball Bearing / Double Track |
| Application | Carts, Trolleys & Mobile Equipment |
| Customization | Size / Material / Color / Stem Specification |
Final specifications should be confirmed according to the selected wheel material and mounting requirements.
The series is available in three wheel diameters for different equipment heights and load requirements.
| Wheel Diameter | Tread Width | Load Height | Load Capacity |
|---|---|---|---|
| 75 mm / 3" | 32 mm | 105 mm | 110 kg |
| 100 mm / 4" | 32 mm | 130 mm | 125 kg |
| 125 mm / 5" | 32 mm | 158 mm | 140 kg |
The 3-inch version provides a compact load height and supports up to 110 kg per caster.
It is suitable for smaller carts, mobile stands and equipment where installation height needs to remain limited.
The 4-inch version supports up to 125 kg per caster and provides a practical balance between maneuverability, load capacity and overall equipment height.
The 5-inch version supports up to 140 kg per caster.
Its larger wheel diameter generally makes it easier to move equipment across floor joints, small thresholds and minor surface irregularities.
This caster series can be configured with different wheel materials according to the operating environment.
TPR can be considered where quieter movement and improved floor protection are important.
PU wheels provide a useful balance between wear resistance, rolling performance and load handling for industrial carts and equipment.
PVC is suitable for selected general-purpose trolley and mobile equipment applications.
PP provides a harder wheel surface and is often suitable for smooth industrial floors where easier rolling and low deformation are priorities.
The best wheel material should be selected according to the floor, load, movement frequency and working environment.
Available colors include:
Orange
Red
Black
Green
White
Different colors can be used to match equipment design, OEM requirements or product identification systems.
Specific material and color combinations should be confirmed before ordering.
