Medium heavy duty casters support 350–7,200 lbs per caster and are the workhorse choice for warehouses, manufacturing floors, distribution centers, and industrial carts. CasterHQ stocks medium heavy duty casters in polyurethane, phenolic, rubber, nylon, and steel wheels from 4" to 12" — available with top plate, threaded stem, and kingpinless mounts. Most ship same day from our network of over $100 million in U.S. warehouse inventory.
Polyurethane on cast iron casters are the top choice for warehouse concrete floors because they are non-marking, chemical-resistant, and handle heavy rolling loads without flatspotting. For smooth concrete, polyurethane tread provides optimal floor protection. For rough or uneven warehouse floors, phenolic or forged steel wheels roll over debris and expansion joints without damage. CasterHQ stocks medium heavy duty polyurethane casters from 4" to 8" in plate and stem mounts — all ship same day.
The best wheel material depends on your floor and load. Polyurethane is the all-around performer for smooth concrete and warehouse floors. Phenolic handles the heaviest loads at the lowest cost but can damage soft floors. Rubber on iron absorbs shock and vibration on rough terrain. Forged steel is indestructible for extreme loads in foundries and steel mills. Nylon resists chemicals and moisture in food processing. CasterHQ engineers recommend matching wheel hardness to floor type for optimal results.
| Specification | Value |
|---|---|
| Wheel Diameter | 4" – 12" |
| Load Capacity | Up to 7,200 lbs/caster |
| Wheel Materials | Polyurethane, Phenolic, Rubber, Nylon, Steel |
| Tread Width | 1-1/4" – 3" |
| Mount Types | Top Plate, Stem, Kingpinless |
| Plate Sizes | 4"x4-1/2" & 4-1/2"x6-1/4" |
| Bearing Type | Ball, Roller, Precision, Tapered |
| Brake Options | Side Lock, Total Lock, Face Contact |
| Feature | Medium Heavy Duty | Heavy Duty |
|---|---|---|
| Load Range | ⚝ 350–7,200 lbs | Up to 17,500 lbs |
| Wheel Materials | ⚝ Poly, Phenolic, Rubber, Nylon, Steel | Poly, Phenolic, Forged Steel, V-Groove |
| Floor Protection | ⚝ Good to Excellent | Moderate (harder wheels) |
| Noise Level | ⚝ Moderate | Moderate to Loud |
| Mount Options | ⚝ Plate, Stem, Kingpinless | Plate, Kingpinless |
| Best For | ⚝ Carts, shelving, manufacturing | Heavy industrial, towing, foundry |
These calculators apply to any caster application—even if you’re browsing a different category. Use them to estimate load rating per caster, select wheel material, and estimate push/pull force. Expand any tool for full analysis + a share-ready spec line.
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