4 inch polyurethane wheel plate casters

Diameter: 4 to 5 inTread: 2 inPlate: 4 x 4-1/2 in (most)Capacity: 700 to 4,000 lb per caster

4 inch polyurethane wheel plate casters with polyurethane, phenolic and ductile iron wheels. Polyurethane on cast iron cores is the most common tread on these 4 inch polyurethane wheel plate casters, rated 700 to 4,000 lb per caster. Ratings by tread: phenolic 800 lb and ductile iron 1,500 lb. Sets of 4 4 inch polyurethane wheel plate casters list 2,800 to 4,000 lb combined.

4 inch polyurethane wheel plate casters by tread

Tread	Core	Wheel sizes	Rated per caster	Listed temperature	Where it fits
Polyurethane	Cast iron	4 in	700 to 4,000 lb	Up to 180°F	quiet, floor-friendly and long wearing
Phenolic		4 in	800 lb	Up to 250°F	hard and easy rolling on smooth, dry floors
Ductile iron	Steel	5 in	1,500 lb	-45°F to 800°F	heavy loads with better impact strength than cast iron

Ratings are for single casters of 4 inch polyurethane wheel plate casters, from product fields [S1].

Wheel sizes

Wheel	Treads	Rated
4 x 2 in	polyurethane and phenolic	700 to 4,000 lb
5 x 2 in	ductile iron	1,500 lb

Choosing 4 inch polyurethane wheel plate casters

Load: divide the loaded weight by three for a four-caster cart [S2]. Among 4 inch polyurethane wheel plate casters, a 1,000 lb caster then suits about 3,000 lb, and the strongest at 4,000 lb about 12,000 lb.
Mount: most 4 inch polyurethane wheel plate casters use a 4 x 4-1/2 in top plate; 4-1/2 x 6-1/4 in plates are listed too; measure bolt hole centers on the old plate and compare.
Floor: on 4 inch polyurethane wheel plate casters, polyurethane is kinder to tile and finished floors; phenolic and ductile iron roll easier under heavy loads on smooth concrete.
Rig: swivel and rigid 4 inch polyurethane wheel plate casters are listed, with total lock brake and side lock brake options.
Heat: among 4 inch polyurethane wheel plate casters, the highest listed range is -45°F to 800°F on ductile iron; check the temperature field on each listing before oven or hot-room use.

Related to 4 inch polyurethane wheel plate casters: industrial casters.

4 inch polyurethane wheel plate casters questions

How much weight can 4 inch polyurethane wheel plate casters carry?

Single 4 inch polyurethane wheel plate casters are rated 700 to 4,000 lb; most fall between 700 and 1,000 lb.

What top plate do 4 inch polyurethane wheel plate casters use?

Most 4 inch polyurethane wheel plate casters use 4 x 4-1/2 in. Other plates on 4 inch polyurethane wheel plate casters: 4-1/2 x 6-1/4 in.

What wheel material is most common on 4 inch polyurethane wheel plate casters?

Polyurethane leads on 4 inch polyurethane wheel plate casters, rated 700 to 4,000 lb per caster. Among 4 inch polyurethane wheel plate casters, phenolic is next at 800 lb.

Jordan Wilson, CasterHQ · reviewed October 20, 2026 · 844-439-4335 · info@casterhq.com

Sources

[S1] CasterHQ product fields (rated load, diameter, width, wheel and core material, temperature range, mount) and product descriptions for the items on this page, pulled October 20, 2026.
[S2] Preferred Equipment casters and wheels quick guide PDF (prefeq.com): load sizing on one less caster, wheel types and floor notes.

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"

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