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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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Colson Medical Casters by Wheel Bearing · Delrin Bearing · Up to 1,250 lb · 4"–8" · Polyurethane

Plate sizes: 4 x 4-1/2Bolt holes: 2-5/8 x 3-3/8 slotted to 3 x 3; 3 x 3Diameter: 4, 5, 6, 8 inTread: 2 inCapacity: up to 1,250 lb
Match a 4 x 4-1/2 top plate when bolting casters under medical carts and lab benches. You will see wheel diameters 4, 5, 6, 8 in, polyurethane and stainless treads, and capacities 600 to 1,250 lb across the SKUs listed below. Size capacity from the heaviest corner load with shock margin, and keep overall height consistent across the set. Confirm stem length and thread pitch on stem mounts so the shoulder seats flush in the boss.
700 lbs
TieredPricing
Colson Casters Stainless 4" x 2" K Solid Polyurethane Delrin Bearing Caster - 4" x 4.5" Plate - SKU: D4.04109.931 KW SS | Durable, High-Performance Caster for Industrial and Medical Use colson-header
Ships in 1-3 Business Days
Colson D4.04109.931 KW SS 4" x 2" Polyurethane Stainless Caster
Part # D4.04109.931-KW-SS
from $166.00
Volume pricing available
Solid PolyurethanePlate
Load rating
700 lbs
Diameter 4"
Capacity 700 lbs
Wheel Solid Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -40°F to 600°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Colson Casters | Stainless 4" x 2" K Solid Polyurethane Delrin Bearing Caster with...
Shop Product
700 lbs
TieredPricing
Colson Casters Stainless 4" x 2" K Solid Polyurethane Delrin Bearing Side-Lock Caster - 4" x 4.5" Plate - SKU: D4.04109.931 KW BRK7 SS | Heavy-Duty Industrial Wheel for Enhanced Maneuverability and Safety colson-header
Ships in 1-3 Business Days
Colson D4.04109.931 4" x 2" Polyurethane Stainless Side-Lock Caster
Part # D4.04109.931-KW-BRK7-SS
from $220.00
Volume pricing available
Solid PolyurethanePlate
Load rating
700 lbs
Diameter 4"
Capacity 700 lbs
Wheel Solid Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5-5/8"
Bolt Pattern 3" x 3"
Temp Range -40°F to 600°F
Rig Type Swivel with Brake
Brake Side Lock Brake
Frame Stainless Steel
Colson Casters | Stainless 4" x 2" K Solid Polyurethane Delrin Bearing Side-Lock Caster...
Shop Product
700 lbs
TieredPricing
Colson Casters Stainless 4" x 2" K Solid Polyurethane Caster with Delrin Bearing, Total Lock & 4" x 4.5" Plate - SKU: D4.04109.931 KW BRK4 SS colson-header
Ships in 1-3 Business Days
Colson D4.04109.931 4" x 2" Polyurethane Stainless Total Lock Caster
Part # D4.04109.931-KW-BRK4-SS
from $214.00
Volume pricing available
Solid PolyurethanePlate
Load rating
700 lbs
Diameter 4"
Capacity 700 lbs
Wheel Solid Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -40°F to 600°F
Rig Type Swivel with Total Lock Brake
Brake Total Lock Brake
Frame Stainless Steel
Colson Casters | Stainless 4" x 2" K Solid Polyurethane Delrin Bearing Caster with...
Shop Product
600 lbs
TieredPricing
Colson Casters Stainless 4" x 2" HI-TECH Polyurethane Delrin Bearing Caster - 4" x 4.5" Plate - Heavy-Duty Caster for Industrial Use - SKU: D4.04109.921 SS colson-header
Ships in 1-3 Business Days
Colson D4.04109.921 SS 4" x 2" Polyurethane Stainless Caster – CasterHQ
Part # D4.04109.921-SS
from $159.00
Volume pricing available
PolyurethanePlate
Load rating
600 lbs
Diameter 4"
Capacity 600 lbs
Wheel Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -20°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Colson Casters | Stainless 4" x 2" HI-TECH Polyurethane Delrin Bearing Caster Product Features...
Shop Product
600 lbs
TieredPricing
Colson Casters Stainless 4" x 2" Eagle Polyurethane Delrin Bearing Caster with 4" x 4.5" Plate - Heavy-Duty, Durable, Ideal for Industrial & Medical Use - SKU: D4.04109.921 EG SS colson-header
Ships in 1-3 Business Days
Colson D4.04109.921 EG SS 4"x2" Polyurethane Stainless Caster – CasterHQ
Part # D4.04109.921-EG-SS
from $153.00
Volume pricing available
PolyurethanePlate
Load rating
600 lbs
Diameter 4"
Capacity 600 lbs
Wheel Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -40°F to 600°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Colson Casters | Stainless 4" x 2" Eagle Polyurethane Delrin Bearing Caster Key Features...
Shop Product
600 lbs
TieredPricing
Colson Casters Stainless 4" x 2" Eagle Polyurethane Delrin Bearing Top-Lock Caster with 4" x 4.5" Plate - SKU: D4.04109.921 EG BRK7 SS | Durable, Secure, and Versatile Caster for Industrial Applications colson-header
Ships in 1-3 Business Days
Colson D4.04109.921 EG 4" x 2" Poly Stainless Caster with Brake
Part # D4.04109.921-EG-BRK7-SS
from $206.00
Volume pricing available
PolyurethanePlate
Load rating
600 lbs
Diameter 4"
Capacity 600 lbs
Wheel Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5-5/8"
Bolt Pattern 3" x 3"
Temp Range -40°F to 600°F
Rig Type Swivel with Brake
Brake Side Lock Brake
Frame Stainless Steel
Colson Casters | Stainless 4" x 2" Eagle Polyurethane Delrin Bearing Top-Lock Caster Key...
Shop Product
600 lbs
TieredPricing
Colson Casters Stainless 4" x 2" Eagle Polyurethane Delrin Bearing Caster with Total Lock - 4" x 4.5" Plate - SKU: D4.04109.921 EG BRK4 SS colson-header
Ships in 1-3 Business Days
Colson D4.04109.921 EG 4" x 2" Poly Stainless Total Lock Caster
Part # D4.04109.921-EG-BRK4-SS
from $200.00
Volume pricing available
PolyurethanePlate
Load rating
600 lbs
Diameter 4"
Capacity 600 lbs
Wheel Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -40°F to 600°F
Rig Type Swivel with Total Lock Brake
Brake Total Lock Brake
Frame Zinc Plated Steel
Colson Casters | Stainless 4" x 2" Eagle Polyurethane Delrin Bearing Caster Product Features...
Shop Product
600 lbs
TieredPricing
Colson Casters Stainless 4" x 2" HI-TECH Polyurethane Delrin Bearing Top-Lock Caster with 4" x 4.5" Plate - SKU: D4.04109.921 BRK7 SS | Durable and Reliable Solution for Industrial and Medical Applications colson-header
Ships in 1-3 Business Days
Colson D4.04109.921 BRK7 SS 4" x 2" Polyurethane Stainless Caster with Brake
Part # D4.04109.921-BRK7-SS
from $213.00
Volume pricing available
PolyurethanePlate
Load rating
600 lbs
Diameter 4"
Capacity 600 lbs
Wheel Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5-5/8"
Bolt Pattern 3" x 3"
Temp Range -40°F to 600°F
Rig Type Swivel with Brake
Brake Side Lock Brake
Frame Stainless Steel
Colson Casters | Stainless 4" x 2" HI-TECH Polyurethane Delrin Bearing Top-Lock Caster Product...
Shop Product
600 lbs
TieredPricing
Colson Casters Stainless 4" x 2" HI-TECH Polyurethane Delrin Bearing Caster with Total Lock and 4" x 4.5" Plate - SKU: D4.04109.921 BRK4 SS | Durable & Versatile Mobility Solution for Industrial and Medical Use colson-header
Ships in 1-3 Business Days
Colson D4.04109.921 BRK4 SS 4" x 2" Poly Stainless Total Lock Caster
Part # D4.04109.921-BRK4-SS
from $207.00
Volume pricing available
PolyurethanePlate
Load rating
600 lbs
Diameter 4"
Capacity 600 lbs
Wheel Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -40°F to 600°F
Rig Type Swivel with Total Lock Brake
Brake Total Lock Brake
Frame Zinc Plated Steel
Colson Casters | Stainless 4" x 2" HI-TECH Polyurethane Delrin Bearing Caster Product Features...
Shop Product
1000 lbs
TieredPricing
Colson Casters Stainless 4" x 2" Solid Elastomer Delrin Bearing Caster with 4" x 4.5" Plate - SKU: D4.04109.831 EN SS | Durable and Versatile Solution for Industrial and Medical Applications colson-header
Ships in 1-3 Business Days
Colson D4.04109.831 EN SS 4" x 2" Solid Elastomer Stainless Caster
Part # D4.04109.831-EN-SS
from $215.00
Volume pricing available
Solid ElastomerPlate
Load rating
1000 lbs
Diameter 4"
Capacity 1000 lbs
Wheel Solid Elastomer
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -45°F to 230°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Colson Casters | Stainless 4" x 2" Solid Elastomer Delrin Bearing Caster Key Features...
Shop Product
1000 lbs
TieredPricing
Colson Casters 4" x 2" Solid Elastomer Delrin Bearing Side-Lock Caster with 4" x 4.5" Plate - Durable Stainless Steel - SKU: D4.04109.831 EN BRK7 SS colson-header
Ships in 1-3 Business Days
Colson D4.04109.831 4" x 2" Solid Elastomer Side Lock Caster
Part # D4.04109.831-EN-BRK7-SS
from $268.00
Volume pricing available
Solid ElastomerPlate
Load rating
1000 lbs
Diameter 4"
Capacity 1000 lbs
Wheel Solid Elastomer
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5-5/8"
Bolt Pattern 3" x 3"
Temp Range -45°F to 230°F
Rig Type Swivel with Brake
Brake Side Lock Brake
Frame Stainless Steel
Colson Casters | Stainless 4" x 2" Solid Elastomer Delrin Bearing Side-Lock Caster Key...
Shop Product
1000 lbs
TieredPricing
Colson Casters Stainless 4" x 2" Solid Elastomer Delrin Bearing Caster with Total Lock - 4" x 4.5" Plate - SKU: D4.04109.831 EN BRK4 SS | Durable, High-Performance Mobility Solution for Industrial and Medical Applications colson-header
Ships in 1-3 Business Days
Colson D4.04109.831 EN BRK4 SS 4"x2" Elastomer Stainless Caster – CasterHQ
Part # D4.04109.831-EN-BRK4-SS
from $263.00
Volume pricing available
Solid ElastomerPlate
Load rating
1000 lbs
Diameter 4"
Capacity 1000 lbs
Wheel Solid Elastomer
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -45°F to 230°F
Rig Type Swivel with Total Lock Brake
Brake Total Lock Brake
Frame Zinc Plated Steel
Colson Casters | Stainless 4" x 2" Solid Elastomer Delrin Bearing Caster with Total...
Shop Product
700 lbs
TieredPricing
Colson Casters Stainless 4" x 2" K Solid Polyurethane Delrin Bearing Rigid Caster - 4" x 4.5" Plate - SKU: D4.04108.931 KW SS | Heavy-Duty Mobility Solution for Industrial and Medical Applications colson-header
Ships in 1-3 Business Days
Colson D4.04108.931 KW SS 4" x 2" Polyurethane Stainless Caster
Part # D4.04108.931-KW-SS
from $125.00
Volume pricing available
Solid PolyurethanePlate
Load rating
700 lbs
Diameter 4"
Capacity 700 lbs
Wheel Solid Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -20°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Colson Casters | Stainless 4" x 2" K Solid Polyurethane Delrin Bearing Rigid Caster...
Shop Product
600 lbs
TieredPricing
Colson Casters Stainless 4" x 2" HI-TECH Polyurethane Delrin Bearing Rigid Caster with 4" x 4.5" Plate - SKU: D4.04108.921 SS | Durable, High-Performance Solution for Industrial and Medical Applications colson-header
Ships in 1-3 Business Days
Colson D4.04108.921 SS 4" x 2" Poly Rigid Stainless Caster
Part # D4.04108.921-SS
from $118.00
Volume pricing available
PolyurethanePlate
Load rating
600 lbs
Diameter 4"
Capacity 600 lbs
Wheel Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -20°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Colson Casters | Stainless 4" x 2" HI-TECH Polyurethane Delrin Bearing Rigid Caster Product...
Shop Product
600 lbs
TieredPricing
Colson Casters Stainless Steel 4" x 2" Eagle Polyurethane Rigid Caster with Delrin Bearing, 4" x 4.5" Plate - SKU: D4.04108.921 EG SS colson-header
Ships in 1-3 Business Days
Colson D4.04108.921 EG SS 4" x 2" Polyurethane Rigid Stainless Caster
Part # D4.04108.921-EG-SS
from $112.00
Volume pricing available
PolyurethanePlate
Load rating
600 lbs
Diameter 4"
Capacity 600 lbs
Wheel Polyurethane
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -20°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Colson Casters | Stainless 4" x 2" Eagle Polyurethane Delrin Bearing Rigid Caster with...
Shop Product
1000 lbs
TieredPricing
Colson Casters Stainless 4" x 2" Solid Elastomer Rigid Caster with Delrin Bearing - 4" x 4.5" Plate - SKU: D4.04108.831 EN SS | Durable & High-Performance Mobility Solution for Industrial Applications colson-header
Ships in 1-3 Business Days
Colson D4.04108.831 EN SS 4" x 2" Solid Elastomer Rigid Stainless Caster
Part # D4.04108.831-EN-SS
from $174.00
Volume pricing available
Solid ElastomerPlate
Load rating
1000 lbs
Diameter 4"
Capacity 1000 lbs
Wheel Solid Elastomer
Mount Plate
Plate Size 4" x 4-1/2"
More Details Less Details
Width 2"
Height 5.63"
Bolt Pattern 3" x 3"
Temp Range -45°F to 230°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Colson Casters | Stainless 4" x 2" Solid Elastomer Delrin Bearing Rigid Caster Key...
Shop Product

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