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The Waterproof Stem Medium Duty Industrial Caster Wheels (3", 4", 5") with Elastic Rubber Single Bearing is built for durability and shock absorption in rough or outdoor industrial settings. Its elastic rubber single bearing is the standout feature—delivering superior vibration reduction and grip on uneven surfaces—making it ideal for agriculture, construction, or outdoor logistics. Designed for medium-duty loads (110–140KGS), this caster includes a waterproof stem and robust wheel materials, ensuring reliable performance in rain, mud, or dusty conditions. The 3”, 4”, and 5” sizes fit utility carts, tool racks, and cleaning equipment, balancing strength with flexibility for harsh environments.
Every part is optimized for shock resistance and weather tolerance, with a focus on elastic rubber’s unique benefits:
Wheel Body Materials: Crafted from PP, PU, TPR, or Elastic Rubber, the wheel body combines abrasion resistance with flexibility. Elastic rubber and TPR options absorb impacts, protecting both the caster and the equipment it carries (e.g., precision tools in aerospace facilities).
Elastic Rubber Single Bearing Structure: The single elastic rubber bearing reduces vibration during rolling, preventing damage to fragile cargo (e.g., lab reagents, electronic parts). Its sealed design blocks water, mud, and dust—critical for outdoor use like agricultural feed transporters.
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: 96*66mm or 75*45mm; hole size: 8.5mm (compatible with heavy-duty screws for outdoor equipment)
Shock Absorption & Grip: Elastic rubber bearing and wheel materials reduce vibration on rough floors (e.g., concrete, gravel) and improve grip in wet conditions—ideal for outdoor carts or construction tool trolleys.
All-Weather Durability: The waterproof stem and sealed elastic rubber bearing resist rain, snow, and UV rays, ensuring performance in agricultural fields, construction sites, or outdoor storage yards.
Quiet Operation: Elastic rubber dampens noise from rolling, making the caster suitable for commercial services (e.g., hotel service carts, office cleaning equipment) where quiet is preferred.
Versatile Load Handling: Supports 110–140KGS, with the 5” size (140KGS) handling heavier outdoor cargo like fertilizer bags or construction materials. The rigid/swivel options fit both fixed-path and flexible-movement needs.
| 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 |
How does the elastic rubber single bearing improve outdoor performance?
Elastic rubber absorbs shocks from uneven terrain (e.g., gravel, potholes) and provides better traction than plastic bearings, preventing the caster from slipping in rain or mud. It also resists UV damage, avoiding cracking in direct sunlight.
Is this caster suitable for hospital equipment, like patient transport carts?
Yes. The elastic rubber bearing’s shock absorption protects patients from jolts, while the waterproof design and easy-to-clean wheel materials (e.g., PP) meet hospital hygiene standards. The quiet operation also avoids disturbing patients.
What is the difference between this caster’s “waterproof stem” and other models’ “waterproof thread stem”?
The waterproof stem uses a seamless rubber seal around the stem base, preventing moisture from seeping into the cart’s frame—critical for outdoor or damp environments. It offers the same protection as thread stem designs but with a simpler, more durable seal.
