Am I in this tier? — the comparison that decides it
676-1,250 lb vs. the tier below and the tier above
| Factor |
351-675 lb (below) |
676-1,250 lb (here) |
1,251-2,000 lb (above) |
| Typical equipment |
Service & utility carts |
Industrial carts, racks, benches |
Machinery bases, die carts |
| Hand-pushable (4-caster set) |
Easily |
Yes, with effort at the top end |
Marginal — often needs a tug |
| Wheel core |
Polyolefin or aluminum |
Cast iron or forged steel core |
Forged steel, often kingpinless |
| Bearing |
Precision ball |
Precision ball or roller |
Roller or tapered roller |
| Swivel construction |
Standard kingpin |
Kingpin (heavier kingpins start here) |
Kingpinless becomes worth it |
Why so much equipment calculates into this band
Two reasons. First, the math: a great many industrial carts carry 2,000–4,000 lb total across four casters, and once you apply a 2× safety factor the per-caster number lands squarely in 676-1,250 lb. Second, the ergonomics: this is the heaviest tier a four-caster set still rolls reliably by hand on a decent floor. Above it, you start needing a tugger or a powered assist, which changes the whole equipment design. So buyers tend to design carts to land in this tier on purpose — it’s the heaviest “still a hand cart” rating.
What changes in caster construction at this tier
This is where wheel cores go to cast iron or forged steel as standard — a polyolefin core can’t carry 1,000+ lb without flexing. Bearings move from purely precision-ball toward roller bearings at the top of the band. Kingpins get thicker. And kingpinless construction starts to make economic sense near the 1,250 lb ceiling — not mandatory yet, but the failure-resistance math begins to favor it if the application sees impact or heavy cycling.
The CasterHQ load-rating ladder — per caster
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Under 350 lb · Light duty — Office, display, AV, healthcare carts
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351-675 lb · Light-medium — Service carts, tool carts, utility trolleys
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676-1,250 lb · Medium duty — Industrial carts, racks, workbenches (you are here)
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1,251-2,000 lb · Medium-heavy — Machinery bases, die carts, equipment
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2,001-4,000 lb · Heavy duty — Large machinery, transfer carts, tooling
676-1,250 lb tier FAQs
Can a four-caster set in this tier still be pushed by hand?Yes, through about 4,000 lb total on a smooth floor — with real effort at the top of the range. Past that, or on rough floors, plan a tugger or powered assist.
Do I need kingpinless casters at this tier?Not mandatory. It becomes worth considering near the 1,250 lb ceiling if the application sees impact, drop loading, or heavy daily cycling. Below ~1,000 lb, a heavy-kingpin caster is usually the better value.
Cast iron core or forged steel core?Cast iron core is the standard and the value pick. Forged steel core resists impact and shock better — choose it if the cart crosses thresholds, dock plates, or debris regularly.
What wheel diameter should I use here?6″ and 8″ dominate this tier. Bigger diameter rolls easier and crosses gaps better; smaller keeps the deck low. 8″ is the safe default if you have the height clearance.
My math lands at 1,300 lb — step up?Yes. Above 1,250 lb you’re in the next tier, where kingpinless construction and roller bearings become the norm. Don’t run a 1,250 lb caster at 1,300 lb.
Confirm you’re in the right tier
Send the load math and whether the cart is hand-pushed or towed. We’ll confirm the tier and the construction you need.
Call 844-439-4335
