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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.

BHP: 1-3/4″ × 2-7/8″, slotted to 3″
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: 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: 2-5/8” 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"
BHP: 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
(3″ Wide Casters), Industry-Standard
(3″ Wide Casters), Industry-Standard
BHP: 3-3/8" x 5-1/4" slotted to 4-1/8" x 6-1/8"
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"
BHP: 4-1/8" x 6" slotted to 4-1/2" x 6-1/8"
View All • 21 Plate Sizes
View All • 21 Plate Sizes
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Caster Wheel Materials & Selection Guide

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Maintenance Free - Ergo Extreme Casters

Diameter: 4 to 8 inTread: 2 inCapacity: 750 to 1,200 lb per casterPlate sizes: 4-1/2 x 6-1/4
This page lists nine polyurethane casters with 4 to 8 in wheels, rated 750 to 1,200 lb each, made by CasterHQ and Hamilton. Most mount on a 4-1/2 x 6-1/4 in plate, and you can pick swivel or rigid and without brakes. You will find a Hamilton Ergo-X2 4 x 2 in Duralast poly swivel caster rated 750 lb and an 8 x 2 in rigid maintenance free caster rated 1,200 lb here.
1200 lbs
TieredPricing
8" x 2" Maintenance Free Swivel Caster - 1,200 lbs Capacity CasterHQ
In Stock · Same/Next Day
8" x 2" Ergo Extreme Swivel Sealed Caster – 1,200 lb
Part # CB-EE82
from $234.00
Volume pricing available
PolyurethanePlate
Load rating
1200 lbs
Size8" x 2"
Capacity1200 lbs
WheelPolyurethane
MountPlate 4-1/2" x 6-1/4"
TypeSwivel
More Details Less Details
Width 2"
Height 10-1/8"
Bolt Pattern 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
Temp Range -40°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
8" x 2" Maintenance Free Swivel Caster - 1,200 lbs CapacityCasterHQ Maintenance Free Ergo...
Shop Product
900 lbs
TieredPricing
5" x 2" Maintenance Free Rigid Caster - 900 lbs Capacity CasterHQ
In Stock · Same/Next Day
5" x 2" Ergo Extreme Rigid Sealed Caster – 900 lb
Part # CB-EE52R
from $93.00
Volume pricing available
PolyurethanePlate
Load rating
900 lbs
Size5" x 2"
Capacity900 lbs
WheelPolyurethane
MountPlate 4-1/2" x 6-1/4"
TypeRigid
More Details Less Details
Width 2"
Height 6-1/2"
Bolt Pattern 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
Temp Range -40°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
5" x 2" Maintenance Free Rigid Caster - 900 lbs CapacityCasterHQ Maintenance Free Ergo...
Shop Product
900 lbs
TieredPricing
4" x 2" Maintenance Free Rigid Caster - 900 lbs Capacity CasterHQ
In Stock · Same/Next Day
4" x 2" Polyurethane Rigid Maintenance Free Caster – 900 lb
Part # CB-EE42R
from $73.00
Volume pricing available
PolyurethanePlate
Load rating
900 lbs
Size4" x 2"
Capacity900 lbs
WheelPolyurethane
MountPlate 4-1/2" x 6-1/4"
TypeRigid
More Details Less Details
Width 2"
Height 5-1/8"
Bolt Pattern 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
Temp Range -40°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
4" x 2" Maintenance Free Rigid Caster - 900 lbs CapacityCasterHQ Maintenance Free Ergo...
Shop Product
900 lbs
TieredPricing
4" x 2" Maintenance Free Swivel Caster - 900 lbs Capacity CasterHQ
In Stock · Same/Next Day
4" x 2" Polyurethane Swivel Maintenance Free Caster – 900 lb
Part # CB-EE42
from $152.00
Volume pricing available
PolyurethanePlate
Load rating
900 lbs
Size4" x 2"
Capacity900 lbs
WheelPolyurethane
MountPlate 4-1/2" x 6-1/4"
TypeSwivel
More Details Less Details
Width 2"
Height 5-1/8"
Bolt Pattern 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
Temp Range -40°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
4" x 2" Maintenance Free Swivel Caster - 900 lbs CapacityCasterHQ Maintenance Free Ergo...
Shop Product
750 lbs
TieredPricing
Hamilton Ergo-X2 Swivel Caster with 4" x 2" Duralast Polyurethane (95A) on Cast Iron Wheel - 750 lbs Capacity Hamilton
Made to Order · 4-6 Wk
Hamilton Ergo-X2 4" x 2" Duralast Poly Swivel Caster – 750 lb
Part # S-ERGO-4DB
from $642.00
Volume pricing available
PolyurethanePlate
Load rating
750 lbs
Size4" x 2"
Capacity750 lbs
WheelPolyurethane
MountPlate 4-1/2" x 6-1/2"
TypeSwivel
More Details Less Details
Width 2"
Height 5.625"
Bolt Pattern 2-7/16" x 4-15/16"
Core Cast Iron
Temp Range -5°F to 160°F
Rig Type Swivel
Brake No Brake
Frame Crimson Powder
Hamilton Ergo-X2 Swivel Caster with 4" x 2" Duralast Poly on Cast Iron Wheel...
Shop Product
1200 lbs
TieredPricing
8" x 2" Maintenance Free Rigid Caster - 1,200 lbs Capacity CasterHQ
In Stock · Same/Next Day
8" x 2" Rigid Maintenance Free Caster – 1,200 lb
Part # CB-EE82R
from $154.00
Volume pricing available
PolyurethanePlate
Load rating
1200 lbs
Size8" x 2"
Capacity1200 lbs
WheelPolyurethane
MountPlate 4-1/2" x 6-1/4"
TypeRigid
More Details Less Details
Width 2"
Height 10-1/8"
Bolt Pattern 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
Temp Range -40°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
8" x 2" Maintenance Free Rigid Caster - 1,200 lbs CapacityCasterHQ Maintenance Free Ergo...
Shop Product
1000 lbs
TieredPricing
6" x 2" Maintenance Free Rigid Caster - 1,000 lbs Capacity CasterHQ
In Stock · Same/Next Day
6" x 2" Ergo Extreme Rigid Maintenance Free Caster – 1,000 lb
Part # CB-EE62R
from $113.00
Volume pricing available
PolyurethanePlate
Load rating
1000 lbs
Size6" x 2"
Capacity1000 lbs
WheelPolyurethane
MountPlate 4-1/2" x 6-1/4"
TypeRigid
More Details Less Details
Width 2"
Height 7-1/2"
Bolt Pattern 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
Temp Range -40°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
6" x 2" Maintenance Free Rigid Caster - 1,000 lbs CapacityCasterHQ Maintenance Free Ergo...
Shop Product
1000 lbs
TieredPricing
6" x 2" Maintenance Free Swivel Caster - 1,000 lbs Capacity CasterHQ
In Stock · Same/Next Day
6" x 2" Ergo Extreme Swivel Caster – 1,000 lb
Part # CB-EE62
from $193.00
Volume pricing available
PolyurethanePlate
Load rating
1000 lbs
Size6" x 2"
Capacity1000 lbs
WheelPolyurethane
MountPlate 4-1/2" x 6-1/4"
TypeSwivel
More Details Less Details
Width 2"
Height 7-1/2"
Bolt Pattern 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
Temp Range -40°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
6" x 2" Maintenance Free Swivel Caster - 1,000 lbs CapacityCasterHQ Maintenance Free Ergo...
Shop Product
900 lbs
TieredPricing
5" x 2" Maintenance Free Swivel Caster - 900 lbs Capacity CasterHQ
In Stock · Same/Next Day
5" x 2" Ergo Extreme Swivel Sealed Caster – 900 lb
Part # CB-EE52
from $172.00
Volume pricing available
PolyurethanePlate
Load rating
900 lbs
Size5" x 2"
Capacity900 lbs
WheelPolyurethane
MountPlate 4-1/2" x 6-1/4"
TypeSwivel
More Details Less Details
Width 2"
Height 6-1/2"
Bolt Pattern 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
Temp Range -40°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
5" x 2" Maintenance Free Swivel Caster - 900 lbs CapacityCasterHQ Maintenance Free Ergo...
Shop Product

Maintenance Free | Ergo Extreme Casters

The Ergo Extreme maintenance-free swivel caster rig is available through Caster Barn, blowing the competition away! Unlike kingpin or kingpinless rigs, this maintenance-free swivel caster rig’s construction allows for even dispersion of load, in return, provides an incredibly dramatic effect in reducing push-pull force compared to any other Caster Rigs in existence!

The CB Ergo Extreme is ideal for industrial applications (such as automotive manufacturing) that require low manual push-pull force.

Some of our Customers that have switched to our Maintenance Free EE-Casters after extensive testing include; General Electric, Toyota, Ford, General Motors, Honda, Boeing, Lockheed Martin, and many more major Manufacturing plants where ergonomics is key in everyday operations.

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