The threaded stem configuration provides a compact mounting solution for carts, frames, workstations and mobile equipment.
Compared with a larger plate-mounted caster, a threaded stem can be useful where the mounting area is limited or where the equipment is specifically designed with a threaded caster connection.
The actual stem diameter, thread pitch and stem length should be matched to the equipment before ordering.
This caster series is designed for applications where wheels may be exposed to moisture during normal industrial use.
The waterproof configuration improves suitability for damp working areas, utility equipment and carts that may undergo routine cleaning.
For continuous washdown, chemical exposure, salt water or highly corrosive environments, the complete caster material and mounting structure should be confirmed according to the actual operating conditions.
Medium-Duty Load Capacity
The series provides rated load capacities of:
| Wheel Size | Wheel Diameter | Tread Width | Load Height | Load Capacity |
| 3" | 75 mm | 32 mm | 105 mm | 110 kg |
| 4" | 100 mm | 32 mm | 130 mm | 125 kg |
| 5" | 125 mm | 32 mm | 158 mm | 140 kg |
The 3-inch version is suitable where lower installation height is important, while the 5-inch model provides greater load capacity and easier rolling over floor joints and small obstacles.
Available Materials, Colors and Sizes
| Specification | Options |
| Product Type | Waterproof Thread Stem Industrial Caster |
| Wheel Material | Rubber / PU / PVC / PP |
| Color | Orange / Red / Black / Green / White |
| Wheel Size | 3" / 4" / 5" |
| Wheel Diameter | 75 / 100 / 125 mm |
| Tread Width | 32 mm |
| Load Capacity | 110 / 125 / 140 kg |
| Mounting Type | Thread Stem |
| Duty Class | Medium Duty |
| Application | Carts, Trolleys & Mobile Industrial Equipment |
Material and color combinations can be selected according to the equipment design and operating environment. Please confirm availability when requesting a quotation.
Wheel Material Options
Different wheel materials provide different performance characteristics, so the material should be selected according to the floor, load and working environment.
Rubber
Rubber is suitable when cushioning, grip and quieter rolling are important.
PU
PU is commonly selected when buyers require a balance between rolling performance, durability and load handling.
PVC
PVC can be used for general-purpose equipment and trolley applications depending on the actual environment.
PP
PP provides a harder rolling surface and can be suitable for equipment operating mainly on smooth industrial floors.
If you are unsure which material is most appropriate, provide the floor type, equipment load and operating environment for selection support.
Choosing the Right Wheel Size
3 Inch
The 3-inch caster has a 75 mm wheel diameter and a rated load capacity of 110 kg.
Its lower load height makes it suitable for compact equipment and carts where overall installation height needs to remain limited.
4 Inch
The 4-inch caster provides a 100 mm wheel diameter and a rated load capacity of 125 kg.
It offers a practical balance between load capacity, maneuverability and installation height for general industrial equipment.
5 Inch
The 5-inch caster has a 125 mm wheel diameter and supports up to 140 kg per caster.
The larger wheel diameter generally makes it easier to move equipment across floor joints, thresholds and minor surface irregularities.
Where Thread Stem Casters Work Best
Thread stem casters are suitable for equipment designed with a compatible threaded connection.
Typical applications include industrial trolleys, mobile workstations, equipment stands, utility carts, storage equipment, workshop carts and other mobile frames.
Before ordering, the threaded mounting specification should be checked carefully. A caster with the correct wheel size but the wrong thread diameter or pitch cannot be installed correctly.
Important Thread Stem Information
For a threaded stem caster, wheel diameter and load capacity are only part of the specification.
The mounting thread should also be confirmed before production.
Recommended information includes:
| Mounting Detail | Information to Confirm |
| Stem Diameter | According to equipment mounting hole |
| Thread Pitch | Must match the equipment thread |
| Stem Length | According to mounting depth |
| Installation Space | Check surrounding clearance |
| Brake Requirement | Swivel / brake option if required |
| Equipment Load | Include equipment and payload |
If replacing an existing caster, customers can provide the original caster sample, drawing or stem dimensions.
Selecting Casters by Total Equipment Load
The load capacity of a complete cart should not be calculated only by multiplying the rated capacity of one caster by the number of wheels.
In real use, loads may shift and floors may not be perfectly level, meaning that all casters do not always carry exactly the same load.
When selecting the caster, consider the total equipment weight, maximum payload, number of casters, floor condition, moving frequency and dynamic impacts.
A suitable safety margin should be included for equipment that moves frequently or operates on uneven floors.
Waterproof Caster Selection
The term waterproof should be considered together with the complete working environment.
For general damp environments and normal cleaning exposure, this series provides a practical industrial option.
However, applications involving aggressive chemicals, high-pressure washing, continuous immersion, high temperature or corrosive liquids may require different bracket, bearing or wheel materials.
Providing the actual operating environment before ordering allows the caster configuration to be selected more accurately.
OEM and Custom Caster Options
Langyi supports standard and customized caster requirements for equipment manufacturers and material handling projects.
Customization can include wheel material, color, wheel size, threaded stem specification, mounting structure and brake configuration.
For OEM projects, customers can provide an equipment drawing, existing caster sample or detailed mounting dimensions.
Why Choose Langyi Thread Stem Industrial Casters?
Langyi specializes in caster, trolley and material handling equipment manufacturing.
The company supports multiple wheel materials, caster sizes and mounting configurations for industrial and OEM applications.
For threaded stem caster projects, Langyi can help match wheel size, load capacity, wheel material and mounting specifications to the actual equipment rather than relying on a single standard configuration.
FAQ
What sizes are available?
This waterproof thread stem caster series is available in 3", 4" and 5" wheel sizes, corresponding to wheel diameters of 75 mm, 100 mm and 125 mm.
What materials are available?
Current wheel material options include Rubber, PU, PVC and PP.
The appropriate material depends on the floor surface, load, operating environment and required rolling characteristics.
What colors are available?
Available colors include Orange, Red, Black, Green and White. Specific material and color combinations should be confirmed before ordering.
What is the maximum load capacity?
The current rated capacities are 110 kg for the 3-inch model, 125 kg for the 4-inch model and 140 kg for the 5-inch model.
What thread size should I order?
The thread diameter, pitch and stem length must match your equipment. If replacing an existing caster, provide the original caster dimensions or sample for confirmation.
When should I choose a thread stem caster instead of a plate caster?
Thread stem casters are particularly useful when the equipment has a dedicated threaded mounting point or limited mounting space. Plate casters are generally more appropriate when the equipment frame is designed around a bolted mounting plate.
Can Langyi customize the stem?
Threaded stem specifications can be discussed according to OEM and equipment requirements. Please provide the required thread diameter, pitch and stem length.
Request a Quote
For an accurate quotation, please provide the required wheel size, wheel material, color, total equipment weight, maximum payload, thread diameter, thread pitch, stem length and operating environment.
Langyi can recommend a suitable 3–5 Inch Waterproof Thread Stem Industrial Caster configuration for your equipment and material handling application.
