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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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Hamilton Standard Duty 52 Series Casters w/ Moldon Rubber Wheels · Up to 1,250 lb · 4"–8"

Diameter: 4, 5, 6, 8 inTread: 2 inCapacity: up to 1,250 lb
This 52 series aisle groups plate-mount casters built for finished floors and quiet institutional carts. You will see wheel diameters 4, 5, 6, 8 in, rubber treads, and capacities 1,250 lb across the SKUs listed below. Use kingpinless or heavy plate series when shock loads keep shearing kingpin races. When floors see chemicals or washdowns, prefer sealed bearings and non-absorbent wheel compounds.

Shop by type

4 types

Wheel = wheel diameter · capacity is per caster.

500 lbs
TieredPricing
Hamilton S-528-R Standard Duty Swivel Caster - 8x2 Inch Mold-On Rubber Wheel on Cast Iron, 3/4" Straight Roller Bearing Hamilton
Made to Order · 4-6 Wk
Hamilton S-528-R 8" x 2" Mold-On Rubber Swivel Caster – 500 lb
Part # S-528-R
from $105.00
Volume pricing available
RubberPlate
Load rating
500 lbs
Diameter 8"
Capacity 500 lbs
Wheel Rubber
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 9-1/2"
Bolt Pattern 2-5/8" x 3-5/8" and 3" x 3"
Core Cast Iron
Temp Range -30°F to 160°F
Rig Type Swivel
Brake No Brake
Frame Bright Zinc Plated
Hamilton S-528-R Swivel Caster | 8" x 2" Mold-On Rubber on Cast Iron Wheel...
Shop Product
410 lbs
TieredPricing
Hamilton S-526-R Swivel Caster - 6x2 Inch Mold-On Rubber Wheel on Cast Iron, Ideal for Industrial Use Hamilton
Made to Order · 4-6 Wk
Hamilton S-526-R 6" x 2" Mold-On Rubber Swivel Caster – 410 lb
Part # S-526-R
from $91.00
Volume pricing available
RubberPlate
Load rating
410 lbs
Diameter 6"
Capacity 410 lbs
Wheel Rubber
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 7-1/2"
Bolt Pattern 2-5/8" x 3-5/8" and 3" x 3"
Core Cast Iron
Temp Range -30°F to 160°F
Rig Type Swivel
Brake No Brake
Frame Bright Zinc Plated
Hamilton S-526-R Standard Duty Swivel Caster | 6" x 2" Mold-On Rubber Wheel Hamilton...
Shop Product
350 lbs
TieredPricing
Hamilton S-525-R Swivel Caster - 5x2 Inch Mold-On Rubber on Cast Iron Wheel with Roller Bearing for Reliable Industrial Use Hamilton
Made to Order · 4-6 Wk
Hamilton S-525-R 5" x 2" Mold-On Rubber Swivel Caster – 350 lb
Part # S-525-R
from $109.00
Volume pricing available
RubberPlate
Load rating
350 lbs
Diameter 5"
Capacity 350 lbs
Wheel Rubber
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 6-1/2"
Bolt Pattern 2-5/8" x 3-5/8" and 3" x 3"
Core Cast Iron
Temp Range -30°F to 160°F
Rig Type Swivel
Brake No Brake
Frame Bright Zinc Plated
Hamilton S-525-R Swivel Caster | 5" x 2" Mold-On Rubber Wheel on Cast Iron...
Shop Product
300 lbs
TieredPricing
S-524-R Hamilton 4" x 2" Standard Duty Swivel Caster - Mold-On Rubber on Cast Iron Wheel with 3/4" Roller Bearing Hamilton
Made to Order · 4-6 Wk
Hamilton S-524-R 4" x 2" Mold-On Rubber Swivel Caster – 300 lb
Part # S-524-R
from $95.00
Volume pricing available
RubberPlate
Load rating
300 lbs
Diameter 4"
Capacity 300 lbs
Wheel Rubber
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5-5/8"
Bolt Pattern 2-5/8" x 3-5/8" and 3" x 3"
Core Cast Iron
Temp Range -30°F to 160°F
Rig Type Swivel
Brake No Brake
Frame Bright Zinc Plated
S-524-R Hamilton Standard Duty Swivel Caster 4" x 2" Mold-On Rubber (70A) on Cast...
Shop Product
500 lbs
TieredPricing
Hamilton R-528-R Standard Duty Rigid Caster - 8x2 Inch Mold-On Rubber Wheel on Cast Iron, 3/4" Straight Roller Bearing Hamilton
Made to Order · 4-6 Wk
Hamilton R-528-R 8" x 2" Mold-On Rubber Rigid Caster – 500 lb
Part # R-528-R
from $105.00
Volume pricing available
RubberPlate
Load rating
500 lbs
Diameter 8"
Capacity 500 lbs
Wheel Rubber
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 9-1/2"
Bolt Pattern 2-5/8" x 3-5/8" and 3" x 3"
Core Cast Iron
Temp Range -30°F to 160°F
Rig Type Rigid
Brake No Brake
Frame Bright Zinc Plated
Hamilton S-528-R Swivel Caster | 8" x 2" Mold-On Rubber on Cast Iron Wheel...
Shop Product
410 lbs
TieredPricing
Hamilton R-526-R Rigid Caster - 6x2 Inch Mold-On Rubber Wheel on Cast Iron, Ideal for Industrial Use Hamilton
Made to Order · 4-6 Wk
Hamilton R-526-R 6" x 2" Mold-On Rubber Rigid Caster – 410 lb
Part # R-526-R
from $76.00
Volume pricing available
RubberPlate
Load rating
410 lbs
Diameter 6"
Capacity 410 lbs
Wheel Rubber
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 7-1/2"
Bolt Pattern 2-5/8" x 3-5/8" and 3" x 3"
Core Cast Iron
Temp Range -30°F to 160°F
Rig Type Rigid
Brake No Brake
Frame Bright Zinc Plated
Hamilton S-526-R Standard Duty Swivel Caster | 6" x 2" Mold-On Rubber Wheel Hamilton...
Shop Product
350 lbs
TieredPricing
Hamilton R-525-R Rigid Caster - 5x2 Inch Mold-On Rubber on Cast Iron Wheel with Roller Bearing for Reliable Industrial Use Hamilton
Made to Order · 4-6 Wk
Hamilton R-525-R 5" x 2" Mold-On Rubber Rigid Caster – 350 lb
Part # R-525-R
from $95.00
Volume pricing available
RubberPlate
Load rating
350 lbs
Diameter 5"
Capacity 350 lbs
Wheel Rubber
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 6-1/2"
Bolt Pattern 2-5/8" x 3-5/8" and 3" x 3"
Core Cast Iron
Temp Range -30°F to 160°F
Rig Type Rigid
Brake No Brake
Frame Bright Zinc Plated
Hamilton S-525-R Swivel Caster | 5" x 2" Mold-On Rubber Wheel on Cast Iron...
Shop Product
300 lbs
TieredPricing
R-524-R Hamilton 4" x 2" Standard Duty Rigid Caster - Mold-On Rubber on Cast Iron Wheel with 3/4" Roller Bearing Hamilton
Made to Order · 4-6 Wk
Hamilton R-524-R 4" x 2" Mold-On Rubber Rigid Caster – 300 lb
Part # R-524-R
from $88.00
Volume pricing available
RubberPlate
Load rating
300 lbs
Diameter 4"
Capacity 300 lbs
Wheel Rubber
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5-5/8"
Bolt Pattern 2-5/8" x 3-5/8" and 3" x 3"
Core Cast Iron
Temp Range -30°F to 160°F
Rig Type Rigid
Brake No Brake
Frame Bright Zinc Plated
R-524-R Hamilton Standard Duty Rigid Caster 4" x 2" Mold-On Rubber (70A) on Cast...
Shop Product

Series R Moldon Rubber-Tired Wheels

Capacity Range: 200 – 3,020 lbs

Durable and Long-Lasting Wheels for Industrial Use

Experience the durability of solid cushion rubber tires, permanently molded onto iron wheel centers, ideal for heavy-duty industrial equipment. With a tire thickness of about 1" and hardness of 70 Durometer (± 5, Shore A), these wheels offer rugged, long-lasting performance.

Technical Specifications and Features

Moldon Rubber-Tired Wheels come standard with anti-friction bearings - straight roller in all sizes, and a choice of straight or tapered rollers in most larger sizes. Equipped with pressure lubrication fittings in the hubs (except for specific sizes), these wheels are designed for a wide range of applications. Operating temperatures range from -70° to 160° F.

Specialized Design for Enhanced Performance

The 5" wide wheel options, including sizes 12" x 5", 14" x 5", 16" x 5", 18" x 5", and 20" x 5", feature husky spokes and large hubs for additional strength and durability. These features ensure optimal performance even under demanding industrial conditions.

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