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.

Kingpinless Casters (Swivel & Rigid) — 4"–8" Wheels, Up to 2,000 lb Capacity

Q: What wheel sizes are available?

4 inches through 8 inches wheel diameters in this category.

Q: What mounting plate size is used here?

4 inches by 4-1/2 inches top plate in this category.

Mounting plate: 4" × 4-1/2" • Built for shock loads and abusive industrial service.

Shock-load capable
ASTM 1045 hot-forged steel
3/8" HRC45 steel balls
Sealed, hardened raceway
Double-welded legs

Why Kingpinless Casters Outlast Standard Swivel Casters

Kingpinless casters are the highest-duty swivel caster design used in industrial material handling. Standard swivel casters rely on a kingpin (nut and bolt) to retain the raceway. Under repeated shock loading and impacts, that kingpin can loosen or shear, leading to raceway separation, bearing loss, and eventual loss of swivel.

CasterHQ kingpinless casters eliminate the kingpin failure mode using an enclosed, welded raceway with an integrally hot-forged top plate and inner raceway. The result is a caster designed for severe service, higher impact tolerance, reduced downtime, and longer replacement intervals (when used within rated limits).

Quick spec snapshot: Up to 2,000 lb per caster • 4"–8" wheel diameters • 4" × 4-1/2" mounting plate

Where kingpinless casters are used

Manufacturing and assembly plants
Automotive and heavy equipment facilities
Large distribution centers and warehouses
Ground support and aerospace equipment
Military and government applications
Waste handling and processing plants
Construction and fabrication environments

Key construction features

Hot-forged ASTM 1045 steel construction
Kingpinless design eliminates kingpin loosening/shear
Integrally forged top plate and inner raceway
Precision-machined, sealed, induction-hardened raceway
3/8" diameter HRC45 hardened steel ball bearings
Double-welded legs for maximum structural integrity
Rigid versions manufactured from 8 mm thick steel
1/2" diameter zerk axle with lock nut

Selection guidance (avoid failures)

Confirm dynamic load and shock factors (not just static weight).
Match wheel material to floor type, debris, temperature, and chemicals.
Verify plate bolt pattern and clearance before ordering.
For impacts, add capacity headroom and consider larger diameter wheels.

Kingpinless Caster FAQs

What is a kingpinless caster?

A kingpinless caster is a heavy-duty swivel caster that does not use a kingpin (nut and bolt) to retain the raceway. The raceway is enclosed and welded for durability under shock load.

Why do standard kingpin casters fail?

Repeated impacts and side loads can loosen or shear the kingpin, which may lead to raceway separation and bearing loss, stopping swiveling and forcing replacement.

What capacity do these support?

Up to 2,000 lbs per caster when used within rated limits and proper application guidelines.

What wheel sizes are available?

4" through 8" wheel diameters in this category.

Is this good for shock loading?

Yes. Kingpinless designs are chosen specifically for shock-load and abusive service environments.

Do they require maintenance?

Less than standard swivel casters, but regular inspection and lubrication (where applicable) are recommended for maximum service life.

What mounting plate size is used here?

4" × 4-1/2" top plate in this category.

Swivel vs rigid — what should I choose?

Swivel provides maneuverability; rigid improves tracking and load stability. Many carts use a mix depending on handling needs.

Durastar Heavy Duty 40 Series - 8" x 2" Ductile Steel Swivel Caster - 2000 lb Capacity, Choose between Top Plate Size and bearing from $55.00 USD

Diameter: 8"

Width: 2"

Capacity: 2000

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 8" x 2" Phenolic Swivel Caster - 1400 lb Capacity, Choose between Top Plate Size and bearing from $55.00 USD

Diameter: 8"

Width: 2"

Capacity: 1400

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 6" x 2" Polyurethane on Steel Swivel Caster - 1200 lb Capacity, Choose between Top Plate Size and bearing from $54.00 USD

Diameter: 6"

Width: 2"

Capacity: 1200

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 6" x 2" Phenolic Swivel Caster - 1200 lb Capacity, Choose between Top Plate Size and bearing from $54.00 USD

Diameter: 6"

Width: 2"

Capacity: 1200

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 6" x 2" Ductile Steel Swivel Caster - 2000 lb Capacity, Choose between Top Plate Size and bearing from $54.00 USD

Diameter: 6"

Width: 2"

Capacity: 2000

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 5" x 2" Phenolic Swivel Caster - 1000 lb Capacity, Choose between Top Plate Size and bearing from $51.00 USD

Diameter: 5"

Width: 2"

Capacity: 1000

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Medium Heavy Duty 34 Series - 8" x 2" Solid Blue Polyurethane Rigid Caster - 1250 lb Capacity, & 4" x 4-1/2" Top Plate $40.00 USD

Diameter: 8"

Width: 2"

Capacity: 1250

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Medium Heavy Duty 34 Series - 8" x 2" Glass-filled Nylon Rigid Caster - 1250 lb Capacity, & 4" x 4-1/2" Top Plate $40.00 USD

Diameter: 8"

Width: 2"

Capacity: 1400

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 8" x 2" Semi-Steel Swivel Caster - 1400 lb Capacity, Choose between Top Plate Size and bearing from $55.00 USD

Diameter: 8"

Width: 2"

Capacity: 1400

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 8" x 2" Solid Polyurethane Swivel Caster - 1400 lb Capacity, Choose between Top Plate Size and bearing from $55.00 USD

Diameter: 8"

Width: 2"

Capacity: 1400

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 8" x 2" Polyurethane on Steel Swivel Caster - 1400 lb Capacity, Choose between Top Plate Size and bearing from $55.00 USD

Diameter: 8"

Width: 2"

Capacity: 1400

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 8" x 2" DURATOUGH Polyurethane on Polyolefin Swivel Caster - 1000 lb Capacity, Choose between Top Plate Size and bearing from $55.00 USD

Diameter: 8"

Width: 2"

Capacity: 1000

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 8" x 2" Duratek High Tech Rubber Swivel Caster - 675 lb Capacity, Choose between Top Plate Size and bearing from $55.00 USD

Diameter: 8"

Width: 2"

Capacity: 675

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 8" x 2" Glass-filled Nylon Swivel Caster - 1400 lb Capacity, Choose between Top Plate Size and bearing from $55.00 USD

Diameter: 8"

Width: 2"

Capacity: 1400

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 6" x 2" Solid Polyurethane Swivel Caster - 1200 lb Capacity, Choose between Top Plate Size and bearing from $54.00 USD

Diameter: 6"

Width: 2"

Capacity: 1200

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 6" x 2" DURATOUGH Polyurethane on Polyolefin Swivel Caster - 900 lb Capacity, Choose between Top Plate Size and bearing from $54.00 USD

Diameter: 6"

Width: 2"

Capacity: 900

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 6" x 2" Duratek High Tech Rubber Swivel Caster - 600 lb Capacity, Choose between Top Plate Size and bearing from $54.00 USD

Diameter: 6"

Width: 2"

Capacity: 600

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 6" x 2" Glass-filled Nylon Swivel Caster - 1200 lb Capacity, Choose between Top Plate Size and bearing from $54.00 USD

Diameter: 6"

Width: 2"

Capacity: 1200

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 5" x 2" Semi-Steel Swivel Caster - 1000 lb Capacity, Choose between Top Plate Size and bearing from $51.00 USD

Diameter: 5"

Width: 2"

Capacity: 1000

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 5" x 2" Solid Polyurethane Swivel Caster - 1000 lb Capacity, Choose between Top Plate Size and bearing from $51.00 USD

Diameter: 5"

Width: 2"

Capacity: 1000

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 5" x 2" Polyurethane on Steel Swivel Caster - 1000 lb Capacity, Choose between Top Plate Size and bearing from $51.00 USD

Diameter: 5"

Width: 2"

Capacity: 1000

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 5" x 2" DURATOUGH Polyurethane on Polyolefin Swivel Caster - 750 lb Capacity, Choose between Top Plate Size and bearing from $51.00 USD

Diameter: 5"

Width: 2"

Capacity: 750

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 5" x 2" Duratek High Tech Rubber Swivel Caster - 500 lb Capacity, Choose between Top Plate Size and bearing from $51.00 USD

Diameter: 5"

Width: 2"

Capacity: 500

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 5" x 2" Glass-filled Nylon Swivel Caster - 1000 lb Capacity, Choose between Top Plate Size and bearing from $51.00 USD

Diameter: 5"

Width: 2"

Capacity: 1000

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 5" x 2" SIRIUS Polyurethane on Aluminum Swivel Caster - 1200 lb Capacity, Choose between Top Plate Size and bearing from $88.00 USD

Diameter: 5"

Width: 2"

Capacity: 1200

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 5" x 2" Ductile Steel Swivel Caster - 1500 lb Capacity, Choose between Top Plate Size and bearing from $51.00 USD

Diameter: 5"

Width: 2"

Capacity: 1500

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 4" x 2" Semi-Steel Swivel Caster - 700 lb Capacity, Choose between Top Plate Size and bearing from $50.00 USD

Diameter: 4"

Width: 2"

Capacity: 700

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 4" x 2" Solid Polyurethane Swivel Caster - 800 lb Capacity, Choose between Top Plate Size and bearing from $50.00 USD

Diameter: 4"

Width: 2"

Capacity: 800

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 4" x 2" Polyurethane on Steel Swivel Caster - 700 lb Capacity, Choose between Top Plate Size and bearing from $50.00 USD

Diameter: 4"

Width: 2"

Capacity: 700

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 4" x 2" Phenolic Swivel Caster - 800 lb Capacity, Choose between Top Plate Size and bearing from $50.00 USD

Diameter: 4"

Width: 2"

Capacity: 800

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Durastar Heavy Duty 40 Series - 4" x 2" Ductile Steel Swivel Caster - 1500 lb Capacity, Choose between Top Plate Size and bearing from $50.00 USD

Diameter: 4"

Width: 2"

Capacity: 1500

Mount Style: Plate

Plate Size: 4" x 4-1/2"

Designed for engineers, manufacturers, and material handling professionals

BHP: 1-3/4″ × 2-7/8″, slotted to 3″

BHP: 1-3/4″ × 2-15/16″ slotted to 2-3/8″ × 3-3/8″

BHP: 2-5/8” X 3-5/8” (Slotted to 3” x 3”)

BHP: 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"

(3″ Wide Casters) — Industry-Standard

BHP: 3-3/8" x 5-1/4" slotted to 4-1/8" x 6-1/8"

BHP: 4-1/8" x 6" slotted to 4-1/2" x 6-1/8"

View All • 21 Plate Sizes

Plate Casters

Stem Casters

Stainless Casters

Ergonomic Casters

Leveling Casters

Kingpinless Casters (Swivel & Rigid) — 4"–8" Wheels, Up to 2,000 lb Capacity

Why Kingpinless Casters Outlast Standard Swivel Casters

Kingpinless Caster FAQs

Caster Engineering Tools

Available Configurations

Industrial and Commercial Engineered Casters

BHP: 1-3/4″ × 2-7/8″, slotted to 3″

BHP: 1-3/4″ × 2-15/16″ slotted to 2-3/8″ × 3-3/8″

BHP: 2-5/8” X 3-5/8” (Slotted to 3” x 3”)

BHP: 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"

(3″ Wide Casters) — Industry-Standard

BHP: 3-3/8" x 5-1/4" slotted to 4-1/8" x 6-1/8"

BHP: 4-1/8" x 6" slotted to 4-1/2" x 6-1/8"

View All • 21 Plate Sizes

Plate Casters

Stem Casters

Stainless Casters

Ergonomic Casters

Leveling Casters

Kingpinless Casters (Swivel & Rigid) — 4"–8" Wheels, Up to 2,000 lb Capacity

Why Kingpinless Casters Outlast Standard Swivel Casters

Kingpinless Caster FAQs

Caster Engineering Tools

Available Configurations

Industrial and Commercial Engineered Casters

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