Up to 350 lbs
Up to 7,000 lbs
Up to 16,000 lbs
Up to 40,000 lbs
Shock absorbing
Outdoor / rough terrain
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All measurements indicate the wheel diameter by the tread width.
The below capacity ranges indicate the working (dynamic) load that each caster will support. A safety factor should be included in your formula to determine your required load rating per caster.
W/(C-1)=R W is total weight needed to move. C is total number of casters required. R is ideal load rating, with safety factor built in. Divide the total load weight by one less caster than you will use to safely determine load rating.
Plate dimensions shown are overall mounting plate size.
When replacing existing casters, select the closest plate size and verify bolt-hole compatibility.
BHP = Bolt Hole Pattern, shown under each plate.

This Kingpinless caster is designed with a 12"x3" Green Poly-on-Iron wheel and features a Poly-Cam Brake, providing reliable and efficient performance for heavy-duty applications.
SKU: 310PY12501SP
Fastening: 6-1/4" x 4-1/2" top plate
Load Capacity: 3500 lb
Mount Height: 13.5 inches
Swivel Radius: 8.69 inches
Note: Ensure compatibility with your application before purchase.
Order processing
In stock. Orders placed before 12pm CT (Mon–Fri) typically ship the same or next business day from our Mansfield, TX warehouse.
Shipping method
Because of its size and weight, this item typically ships LTL freight on a pallet. Smaller add-on items may ship parcel. Freight cost is calculated by destination and shown before payment, or quoted for large orders.
Payment & procurement terms
New to CasterHQ? Open an account or request terms and send your resale or tax-exemption certificate before ordering so it is applied at checkout.
Volume pricing & quotes
Quantity discounts apply automatically — no codes needed. For large, recurring, or custom requirements, request a bulk quote and our team will confirm pricing, lead time, and total landed freight upfront.
Returns & warranty
Stock items carry a 30-day return policy in unused, resalable condition. Made-to-order and custom items are non-returnable once production starts. All products carry the manufacturer's warranty against defects.
Central & Southern U.S.: typically 1–2 business days
East & West Coasts: typically 2–3 business days
Remote areas and freight deliveries may take longer.
For pallet freight, scheduled releases, or blanket purchase orders, contact our team and we'll confirm total landed cost before you commit. Direct line: 844-439-4335.
The Kingpinless 12"x3" Green Poly-on-Iron Caster is engineered for robust performance in demanding industrial environments. Designed with a kingpinless architecture, this caster minimizes failure points, offering enhanced durability and longevity under heavy loads.
This caster is perfect for a range of industrial and commercial applications, including warehouse equipment, material handling carts, and heavy machinery. Its robust design ensures reliable performance in challenging environments, making it an essential component for any heavy-duty operation.
For any questions or assistance, our team of experts is available from 8 am to 5 pm on weekdays. We are committed to helping you find the perfect solution for your project needs.
Note: Always verify product compatibility with your specific application requirements before purchase.
This Albion 310PY12501SP 12"x3" Poly-on-Iron Kingpinless Caster w/ Brake – 3500 lb is rated to 3500 lbs per caster. Size a set by dividing the total load by the number of casters, and for uneven floors assume 3 of 4 casters carry the load. Keep continuous-use loads within about 75-80% of the rating.
This caster uses a top-plate mount with a 4-1/2" x 6-1/4" plate and a 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4" bolt pattern. Measure your existing mounting holes before ordering; if you are replacing casters, match the bolt pattern - most standard patterns interchange across brands.
Rated for -20°F to 180°F. Operating outside the rated range can reduce wheel life and load capacity, so match it to your environment (wash-down, freezer, oven-adjacent, etc.).
The overall height (floor to top of plate or stem) is 13.5". Account for it when checking equipment clearance, dock height, and ergonomic working height.
We accept purchase orders and offer Net 30 on approved accounts, ACH, and all major cards, plus tax-exempt ordering with a resale or exemption certificate. Volume discounts apply automatically; request a bulk quote for large or recurring orders. Stock items carry a 30-day return policy in unused condition (made-to-order items are non-returnable once production starts).
$432.00
| Dimensions & Mounting | |
| Wheel Diameter | 12" |
| Wheel Tread Width | 3" |
| Overall Height | 13.5" |
| Plate Size | 4-1/2" x 6-1/4" |
| Bolt Hole Pattern | 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4" |
| Mount Style | Plate |
| Load & Performance | |
| Wheel Capacity | 3500 lbs |
| Temp Range | -20°F to 180°F |
| Materials & Finish | |
| Frame Material | Zinc Plated Steel |
12" x 3" Phenolic Rigid Kingpinless Caster – 3,500 lb | CasterHQ
12" x 3" · 3500 lbs · Direct fit
$158
12" x 3" Green Polyurethane Rigid Caster – 2,500 lb | CasterHQ
12" x 3" · 2500 lbs · Direct fit
$196
12" x 3" Red Ductile Steel Rigid Caster – 2,500 lb | CasterHQ
12" x 3" · 2500 lbs · Direct fit
$297
View all 12" x 3" casters & wheels · mold-on rubber, polyurethane, pneumatic →
Your selection is highlighted. Every option shares its wheel size and mount; a Direct fit tag means the same mounting plate — a drop-in replacement. Step up or down in load rating, all in-stock.
| Casters (in stock) | Load capacity | Wheel | Type | Overall height | Price | |
|---|---|---|---|---|---|---|
| 2500 lbsLighter duty | 12" × 3"Polyurethane | Swivel | 13-1/2" | $111.00 | View → | |
| 2500 lbsLighter duty | 12" × 3"Polyurethane | Swivel | 13-1/2" | $180.00 | View → | |
| 3500 lbs | 12" × 3" | — | 13.5" | $432.00 | Viewing | |
| 3500 lbsSame capacity | 12" × 3"Phenolic | Rigid | 13-1/2" | $158.00 | View → | |
| 6000 lbsHeavier duty | 12" × 3"Polyurethane | Rigid | 15-1/2" | $599.00 | View → |





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