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![Top plate bolt pattern drawing, ["4-1/2\" x 6-1/4\""] plate, slotted bolt holes](http://casterhq.com/cdn/shop/files/casterhq-c8g-633-top-plate-drawing_100x.png?v=1792280003)
Upgrade your equipment with the Albion Casters 6" x 3" Kingpinless Top Lock Polyurethane-on-Iron Wheel Caster. Proudly made in the USA, this caster combines durability with high performance. The 6-1/4" x 4-1/2" top plate and kingpinless design provide enhanced strength and stability, while the polyurethane-on-iron wheel ensures smooth and quiet operation even under heavy loads. The top lock mechanism secures the caster firmly in place, making it ideal for demanding industrial applications. Choose this caster for reliable performance and superior load handling in your operations.
Experience unmatched durability and smooth performance with the Albion Casters Kingpinless Top Lock Polyurethane-on-Iron Wheel Caster. Ideal for high-demand environments, this caster offers secure mounting and superior load capacity.
Made in the USA by Albion.
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
Smaller orders ship parcel (UPS/FedEx Ground). Heavy or bulk quantities consolidate to LTL freight. The method and final cost are shown before payment, so there are no post-checkout adjustments.
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 Albion Casters 6" x 3" Kingpinless Top Lock Polyurethane-on-Iron Wheel Caster is engineered for durability and high performance in industrial settings. This USA-made caster features a robust 6-1/4" x 4-1/2" top plate and a kingpinless design that enhances its load-bearing capabilities and extends its lifespan. With its polyurethane-on-iron wheel, it delivers smooth and quiet operation, making it ideal for demanding environments where performance and reliability are crucial.
This Albion caster is specifically designed to meet the rigorous demands of industrial environments. The kingpinless design enhances its reliability and reduces maintenance, while the polyurethane-on-iron wheel ensures a quiet and smooth operation even under heavy loads. The top lock mechanism secures the caster firmly, providing stability and reducing the risk of accidents or equipment movement. With its robust construction and high load capacity, this caster is a top choice for those seeking durable and high-performing solutions for their equipment.
Ideal for use in manufacturing plants, warehouses, and other heavy-duty environments, this caster is perfect for equipment such as industrial carts, workbenches, and mobile platforms. Its ability to handle substantial loads while providing smooth, quiet mobility makes it a versatile choice for a wide range of applications.
This Albion 310PY06501SFBB 6" x 3" Poly-on-Iron Kingpinless Caster – CasterHQ is rated to 2000 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 runs a Cast Iron wheel with a 3" tread width. Steel / iron wheels give maximum capacity and durability on smooth, hard industrial floors and tolerate heat.
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 -40°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 Cast Iron wheel performs best on smooth, hard industrial floors. For non-marking or clean-environment needs, ask us about matching tread options.
The overall height (floor to top of plate or stem) is 7.5". 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).
Application guidance for load margin, wheel materials, and swivel construction. Confirm ratings against your duty cycle, floor, and temperature before final spec.
Start with total system weight (payload + structure + fixtures), divide by casters that actually share the load, and keep continuous working load per caster at or below roughly 75% of catalog capacity (~25% margin). Heavy-duty kingpinless frames are often used on uneven floors, docks, and towed trains where dynamic load transfer is common — do not assume perfect four-caster share. If impact, drop-offs, or shock loading is expected, treat the margin as a floor, not a stretch goal, and confirm capacity at the wheel diameter and tread you select on this PDP. Dynamic and side loads are separate from static catalog ratings; call out towing or AGV duty when you quote so we can sanity-check the configuration.
Stay with polyurethane when floors are relatively smooth, temperatures stay inside the PU service window, and you want floor protection plus rollability. Move to phenolic, glass-filled nylon, or other high-temp / high-hardness options when heat, certain chemicals, or very high point loads push past what standard PU can sustain. Kingpinless construction solves swivel durability under thrust; it does not raise the wheel’s temperature or chemical limit. Use the wheel material and temperature fields on this product (and sibling SKUs) to match the environment — heat duty and side-thrust duty are independent selection axes.
Kingpin swivels concentrate clamping and much of the axial stack through one pin. Towing hitches, AGV corrections, and side scrub introduce lateral and moment loads that work that pin and the race faces harder than hand-pushed carts. Typical early wear modes include kingpin stretch or hole elongation, race brinelling, and increasing swivel play. Kingpinless designs replace that single-pin stack with a machined or forged raceway that carries thrust through the race path, which is why they are the usual spec for powered towing and higher side-load industrial carts. Pair kingpinless swivels with a wheel and bearing package rated for the same duty — the swivel upgrade alone does not fix an undersized tread or bearing.
$294.00
| Identification | |
|---|---|
| Part Number / SKU | 310PY06501SFBB |
| Core | |
| Load Capacity | 2000 lbs |
| Wheel Diameter | 6" |
| Wheel Width | 3" |
| Floor to top of mounting plate (or stem shoulder).Overall Height (OAH)Floor to top of mounting plate (or stem shoulder). | 7.5" |
| Distance from swivel centerline to the outer edge of the wheel when turned.Swivel RadiusDistance from swivel centerline to the outer edge of the wheel when turned. | 8-1/2" |
| Horizontal distance from the swivel centerline (kingpin) to the wheel axle.Swivel Lead (Offset)Horizontal distance from the swivel centerline (kingpin) to the wheel axle. | 1-3/8" |
| Swivel Construction | Kingpinless |
| Mounting | |
| Mount Style | Plate |
| Plate Size | 4-1/2" x 6-1/4" |
| Center-to-center spacing of the top-plate mounting holes.Bolt Hole Pattern (BHP)Center-to-center spacing of the top-plate mounting holes. | 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4" |
| Recommended Mounting Bolt | 1/2" |
| Wheel | |
| Wheel Material | Cast Iron |
| Wheel Core Material | Cast Iron |
| Wheel tread hardness. Shore D is hard; Shore A is softer.Durometer (Shore)Wheel tread hardness. Shore D is hard; Shore A is softer. | 95 Shore A |
| Wheel Color | Green Tread on Black Cast Iron Core |
| Bearing Type | Roller Bearing |
| Thread Guard | None |
| Construction | |
| Frame / Finish | Zinc Plated Steel |
| Temperature Range | -40°F to 180°F |
| Warranty | 3 Years |
| Compliance | |
| Country of Origin | United States |
| Buy American | Yes |
Drag to rotate. Select a label (OAH, Plate, BHP, Dia, Width) for its dimensioned drawing view; Esc or Back to 3D returns. Double-click or Reset view to recenter. Values from manufacturer specs; series geometry for the 3" tread plate caster family.
Series geometry, reference only. Verify critical dims against the spec table.
Free for design use. Redistribution or resale prohibited.
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 within the same duty class, all in stock.
| Casters (in stock) | Load capacity | Wheel | Type | Overall height | Price | |
|---|---|---|---|---|---|---|
| 1800 lbsLighter duty | 6" × 3"Polyurethane | Rigid | 7-1/2" | $306.00 | View → | |
| 2000 lbs | 6" × 3"Cast Iron | — | 7.5" | $294.00 | Viewing | |
| 2000 lbsSame capacity | 6" × 3"Polyurethane | Swivel | 8" | $131.00 | View → | |
| 2000 lbsSame capacity | 6" × 3"Polyurethane | Rigid | 7-1/2" | $100.00 | View → | |
| 2000 lbsSame capacity | 6" × 3"Polyurethane | Swivel | 7-1/2" | $173.00 | View → |
![Top plate bolt pattern drawing, ["4-1/2\" x 6-1/4\""] plate, slotted bolt holes](http://casterhq.com/cdn/shop/files/casterhq-c8g-633-top-plate-drawing_1000x.png?v=1792280003)