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Custom made to order. All sales final.
Each Hamilton product is custom manufactured for your order and ships in about 4-6 weeks. Please confirm all specs before checkout, since made-to-order items aren't eligible for returns, exchanges or refunds. Need help? Call 844-439-4335 or email info@casterhq.com and we'll verify fit for you.
The Hamilton Spinfinity S-ZFHS-6SWC85 Swivel Caster brings together unmatched durability and optimal mobility. Part of Hamilton's renowned ZFHS series, this swivel caster is maintenance-free and kingpinless, making it ideal for heavy-duty industrial applications.
Our S-ZFHS-6SWC85 caster boasts a 6" x 2" UltraGlide (85A) Twin Wheel with a distinctive blue tread. The wheel is set on an aluminum core, providing it with incredible sturdiness. This wheel's unique tread composition offers superior maneuverability and weight distribution, ensuring smooth, quiet operation even under demanding loads.
The caster's pivot system features 3/4" sealed precision ball bearings. These provide excellent rollability and longevity, ensuring your caster operates at peak performance for longer. Coupled with the kingpinless design, this results in a swivel caster that offers ease of movement, reliable performance, and high resilience.
Choose the Hamilton Spinfinity S-ZFHS-6SWC85 Swivel Caster for a robust and efficient solution to your industrial mobility needs.
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 S-ZFHS-6SWC85 Hamilton Spinfinity Maintenance-Free Kingpinless ZFHS Series Swivel Caster is an innovative product designed for superior performance in various industrial applications. This swivel caster from Hamilton's Spinfinity series stands out due to its robust and reliable design that can handle heavy loads without any difficulty.
One of the key features of this caster is its maintenance-free design. You don't need to worry about continuous upkeep; this product promises longevity and hassle-free operation. The kingpinless construction of this caster also deserves special mention as it significantly enhances the strength of the unit while also improving its resistance to shock and impact.
The swivel caster boasts a 6" x 2" UltraGlide (85A) Twin Wheel that offers smooth, quiet operation on different types of surfaces. The blue tread on the aluminum core not only gives it an attractive appearance but also ensures excellent traction and extended wear.
With 3/4" sealed precision ball bearings, this swivel caster guarantees effortless movement and easy turning. This feature reduces the manual effort required to move heavy loads and enhances the maneuverability of the caster. Belonging to the well-regarded Spinfinity ZFHS Series from Hamilton, this caster assures you of its superior durability and performance.
The high load capacity of this unit makes it suitable for a wide variety of commercial and industrial applications. The caster's effortless swivel action ensures precise steering and easy motion. Furthermore, the high performance cast nylon wheel it is equipped with offers exceptional load-bearing capabilities and resistance to wear and tear.
In conclusion, the S-ZFHS-6SWC85 Hamilton Spinfinity Maintenance-Free Kingpinless ZFHS Series Swivel Caster with its robust construction is an excellent choice for those seeking longevity, reliability, and superior performance in high-demand environments.
This Hamilton S-ZFHS-6SWC85 6" x 2" UltraGlide Swivel Kingpinless Caster is rated to 1200 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 Polyurethane wheel with a 2" tread width. Polyurethane protects finished floors, rolls quietly, and resists most chemicals while carrying heavy loads.
This caster uses a top-plate mount with a 4-1/2" x 6-1/2" plate and a 2-7/16" x 4-15/16" and 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.
This is a Swivel caster. Swivel casters rotate 360 degrees for full maneuverability. For most mobile equipment we recommend 2 swivel + 2 rigid, or 4 swivel with at least 2 brakes.
The Polyurethane wheel performs best on smooth to semi-smooth floors including sealed concrete, tile, and epoxy. For non-marking or clean-environment needs, ask us about matching tread options.
The overall height (floor to top of plate or stem) is 7-3/4". 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.
$444.00
| Identification | |
|---|---|
| Part Number / SKU | S-ZFHS-6SWC85 |
| Replacement Wheel Part No | W-620-SWC85-1/2 |
| Core | |
| Load Capacity | 1200 lbs |
| Wheel Diameter | 6" |
| Wheel Width | 2" |
| Floor to top of mounting plate (or stem shoulder).Overall Height (OAH)Floor to top of mounting plate (or stem shoulder). | 7-3/4" |
| Rig Type | Swivel |
| Brake | No Brake |
| 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. | 2" |
| Swivel Construction | Kingpinless |
| Mounting | |
| Mount Style | Plate |
| Plate Size | 4-1/2" x 6-1/2" |
| 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" and 3-3/8" x 5-1/4" |
| Recommended Mounting Bolt | 1/2" |
| Wheel | |
| Wheel Material | Polyurethane |
| Wheel Core Material | Aluminum |
| Wheel Color | Blue Tread on Alum Center |
| Bearing Type | Precision Sealed Ball Bearing |
| Construction | |
| Frame / Finish | Crimson Powder |
| Unit Weight | 14 lbs |
| Compliance | |
| Buy American | Yes |
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 | |
|---|---|---|---|---|---|---|
| 900 lbsLighter duty | 6" × 2"Polyurethane | Rigid | 7-1/2" | $23.00 | View → | |
| 1000 lbsLighter duty | 6" × 2"Blue Solid Polyurethane | — | 7-1/2" | $182.00 | View → | |
| 1200 lbs | 6" × 2"Polyurethane | Swivel | 7-3/4" | $444.00 | Viewing | |
| 1200 lbsSame capacity | 6" × 2"Semi-Steel | Rigid | 7-1/2" | $40.00 | View → | |
| 1200 lbsSame capacity | 6" × 2"Polyurethane | Rigid | 7-1/2" | $65.00 | View → |
