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The Kingpinless Heavy Duty 40 Series 4" x 2" Semi-Steel Swivel Caster is engineered for superior durability and reliable performance in tough environments. With a 700 lb load capacity, this caster is perfect for industrial carts, warehouse equipment, and other heavy-duty applications that require both strength and maneuverability.
Constructed with high-quality semi-steel, this caster is built to last under rigorous use, ensuring a long service life even in demanding conditions. The 360-degree swivel design allows for smooth, effortless turning, enhancing productivity and reducing user strain during operation.
Choose between various top plate sizes and bearing options to tailor the caster to your specific needs. Whether you require a robust caster for heavy machinery or a versatile solution for multiple applications, the Kingpinless Heavy Duty 40 Series offers the reliability and flexibility you need.
Perfect for a range of settings, from factories to warehouses, this caster combines strength, flexibility, and smooth movement to improve operational efficiency. Trust the Kingpinless name for your mobility solutions.
Enhance your heavy-duty equipment with the Kingpinless Heavy Duty 40 Series Semi-Steel Swivel Caster. Experience unmatched durability, smooth operation, and customizable options designed for high-performance applications.
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 Durastar Heavy Duty 40 Series 4" x 2" Semi-Steel Swivel Caster is a robust and highly durable caster solution designed to meet the demanding needs of industrial, commercial, and heavy-duty applications. With a 700 lb load capacity, this caster is ideal for transporting heavy machinery, equipment, and goods in environments where durability and performance are essential.
Designed for heavy-duty use, the Durastar Heavy Duty 40 Series caster can withstand challenging environments, making it ideal for industrial operations, factories, warehouses, and medical settings. Its high weight capacity, combined with the semi-steel material, ensures a long service life, even in high-traffic or abrasive conditions.
Whether you need to move heavy machinery or large containers, the caster's smooth 360-degree swivel action allows for easy maneuverability. The customizable bearing options allow you to choose the most suitable type for your needs, optimizing the caster's performance depending on the application, load, and environment.
When you choose the Durastar Heavy Duty 40 Series, you’re investing in a caster that delivers top-tier performance and reliability. With its exceptional load capacity, high-quality construction, and customizable options, this caster is an ideal solution for both industrial and commercial needs. It provides enhanced maneuverability, superior durability, and the flexibility to handle a wide range of applications, making it an essential component of your mobility solutions.
Upgrade your operations with the Durastar Heavy Duty 40 Series 4" x 2" Semi-Steel Swivel Caster. Experience superior durability, enhanced maneuverability, and tailored solutions for all your heavy-duty mobility needs. Trust in Durastar's commitment to quality and performance to keep your operations running smoothly and efficiently.
This 4" x 2" Semi-Steel Swivel Kingpinless Caster – 700 lb is rated to 700 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 Semi-Steel wheel with a 2" 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" x 4-1/2", 4-1/2" x 6-1/4" plate. 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.
Rated for -45°F to 600°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 Semi-Steel 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 5-5/8". 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.
$60.00
| Identification | |
|---|---|
| Part Number / SKU | 40-S-420-SS |
| Product Series | Durastar 40 Series |
| Core | |
| Load Capacity | 700 lbs |
| Wheel Diameter | 4" |
| Wheel Width | 2" |
| Floor to top of mounting plate (or stem shoulder).Overall Height (OAH)Floor to top of mounting plate (or stem shoulder). | 5-5/8" |
| Rig Type | Swivel |
| Brake | No Brake |
| 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. | 3-1/8" |
| Swivel Construction | Kingpinless |
| Mounting | |
| Mount Style | Plate |
| Plate Size | 4" x 4-1/2", 4-1/2" x 6-1/4" |
| Wheel | |
| Wheel Material | Semi-Steel |
| Wheel Color | Gray |
| Construction | |
| Frame / Finish | Zinc Plated Steel |
| Temperature Range | -45°F to 600°F |
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 2" tread plate caster family.
Series geometry, reference only. Verify critical dims against the spec table.
Free for design use. Redistribution or resale prohibited.
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 2" 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 | |
|---|---|---|---|---|---|---|
| 400 lbsLighter duty | 4" × 2"Rubber | Swivel | 5-5/8" | $24.00 | View → | |
| 600 lbsLighter duty | 4" × 2"High Temp Phenolic | Swivel with Brake + brake | 5-5/8" | $265.00 | View → | |
| 700 lbs | 4" × 2"Semi-Steel | Swivel | 5-5/8" | $60.00 | Viewing | |
| 700 lbsSame capacity | 4" × 2"Semi-Steel | Rigid | 5-5/8" | $38.00 | View → | |
| 700 lbsSame capacity | 4" × 2"Polyurethane | Swivel | 5-5/8" | $70.00 | View → |
