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The Waterproof Thread Stem Medium Duty Industrial Caster Wheels (3", 4", 5") with PP Single Bearing is a streamlined, hygiene-focused solution for medium-duty industrial needs (110–140KGS). Its core advantage lies in the PP single bearing—lightweight, easy to clean, and food-grade—making it perfect for environments where sanitation and simplicity are priorities, such as food processing plants, hospitals, and laboratories. Available in 3”, 4”, and 5” sizes, this caster features a waterproof thread stem and durable wheel materials, balancing efficiency with low maintenance for daily use on carts, benches, or display racks.
This caster prioritizes hygiene and practicality, with materials tailored to cleanroom or food-safe settings:
Wheel Body Materials: Made from PP, PU, TPR, or Nylon, the wheel body is non-porous, resistant to stains, and easy to wipe down. PP and TPR options are antibacterial, preventing mold or bacteria growth in moist areas (e.g., hospital supply carts).
PP Single Bearing Structure: The single PP bearing reduces complexity while maintaining smooth rolling. Unlike double-bearing designs, it has fewer crevices for dirt buildup—critical for sterile environments. The sealed housing also blocks water and dust, eliminating lubrication needs.
Dimensional Specifications:
Wheel diameter: 75mm (3”), 100mm (4”), 125mm (5”)
Tread width: 32mm (all sizes)
Load height: 105mm (3”), 130mm (4”), 158mm (5”)
Mounting plate: 9666mm or 7545mm; hole size: 8.5mm (fits standard screws for quick installation)
Hygiene-First Design: PP single bearing and non-porous wheel materials are easy to sanitize with disinfectants, meeting medical or food safety standards (e.g., HACCP for food processing).
Lightweight & Efficient: The single-bearing structure reduces the caster’s overall weight, making it easier to attach to lightweight carts (e.g., retail display stands, lab reagent trolleys) without sacrificing load capacity.
Waterproof & Low-Upkeep: The sealed bearing and waterproof thread stem prevent moisture damage, so no regular lubrication or disassembly is needed—saving time for staff in busy facilities.
Stable Load Support: Despite its single bearing, the caster handles 110–140KGS (3”: 110KGS, 4”: 125KGS, 5”: 140KGS), suitable for medium-duty tasks like moving assembly parts or hospital linens.
| Wheel Material | Wheel Dia | Tread Width | Load Height | Plate Size | Plate Size | Hole Size | Load Capacity |
| TPR/PU/PVC/PP | 75 (3") | 32 | 105 | 96*66 | 75*45 | 8.5 | 110 |
| 100 (4") | 32 | 130 | 96*66 | 75*45 | 8.5 | 125 | |
| 125 (5") | 32 | 158 | 96*66 | 75*45 | 8.5 | 140 |
Why a single bearing instead of double bearings—does it affect stability?
The PP single bearing is engineered for medium-duty loads (110–140KGS), so stability is not compromised. It offers simpler maintenance and fewer dirt traps, making it better for sterile environments (e.g., labs) where double bearings might require more frequent cleaning.
Can this caster be used on uneven floors, like in agricultural barns?
Yes. The TPR or PU wheel materials have slight elasticity, absorbing small bumps on uneven floors. The 5” size (140KGS load) is especially suitable for agricultural utility carts, as its larger diameter eases rolling over gravel or dirt.
Is the PP bearing resistant to high temperatures?
PP bearings tolerate temperatures up to 80°C (176°F), making them safe for use near food ovens or industrial heaters (e.g., bakery production lines). For temperatures above 80°C, opt for the PU wheel body material for extra heat resistance.
