Medium Duty High Temp Casters

This collection holds Medium Duty High Temp Casters with phenolic, metal and forged steel wheels, built for heavy equipment, dies, molds, and plant carts that move very heavy loads. Casters in this collection range from 600 to 7,000 lb per caster. Wheels in this category range from 4 up to 12 inches in diameter with 2 to 3 in tread widths. The collection includes swivel, rigid, and brake models. Kingpinless swivels hold up better under shock and repeat loads. Phenolic rolls easily on smooth floors and handles dry heat, oil, and grease, but it is not made for water or washdown. It suits warehouse carts, toolboxes, and tool carts, and it is loud on rough floors. Metal wheels roll with low effort and handle debris and heat. They are loud and can mark finished floors. Choose swivel casters when the cart must turn in place and rigid casters for straight travel. Phenolic aisle: phenolic casters. Wheel hub: replacement wheels.

Shop by wheel material

3 types

Rubber and polyurethane favor floor protection; phenolic and steel favor heavy capacity. Compare materials →

Medium duty high temperature casters by tread

Tread	Core	Wheel sizes	Rated per caster	Listed temperature	Where it fits
High-temp phenolic	Phenolic	4 to 12 in	600 to 900 lb	Up to 525°F	oven and hot-room carts
Ductile iron	Steel	4 to 12 in	1,500 to 6,000 lb	-20°F to 800°F	heavy loads with better impact strength than cast iron
Semi-steel	Steel	4 to 12 in	700 to 1,400 lb	-45°F to 600°F	rough floors, heat and heavy loads
Nylon		4, 5, 6 and 8 in	1,000 lb	Up to 550°F	low rolling effort on smooth floors, handles wet areas

Ratings are for single casters of medium duty high temperature casters, from product fields [S1].

Wheel sizes

Wheel	Treads	Rated
4 x 2 in	high-temp phenolic, semi-steel and ductile iron	600 to 1,500 lb
5 x 2 in	high-temp phenolic, semi-steel and nylon	750 to 1,500 lb
6 x 2 in	high-temp phenolic, semi-steel and ductile iron	900 to 2,000 lb
6 x 3 in	ductile iron and semi-steel	2,500 to 6,000 lb
8 x 2 in	high-temp phenolic, semi-steel and ductile iron	900 to 2,500 lb
8 x 3 in	ductile iron and high-temp phenolic	1,900 to 6,000 lb
10 x 3 in	ductile iron, semi-steel and high-temp phenolic	2,400 to 7,000 lb
12 x 3 in	ductile iron, semi-steel and high-temp phenolic	2,500 to 7,000 lb

Choosing medium duty high temperature casters

Load: divide the loaded weight by three for a four-caster cart [S2]. A 2,000 lb caster from this page then suits about 6,000 lb, and the strongest at 6,000 lb about 18,000 lb.
Mount: most medium duty high temperature casters use a 4 x 4-1/2 in top plate; 4-1/2 x 6-1/4 in plates are listed too; match the bolt holes on your frame to the plate before ordering.
Floor: on medium duty high temperature casters, high-temp phenolic, ductile iron, semi-steel and nylon suit smooth concrete and heavy loads, but are loud and hard on tile and wood.
Rig: swivel and rigid medium duty high temperature casters are listed, with side lock brake options.
Heat: among medium duty high temperature casters, the highest listed range is -20°F to 800°F on ductile iron; check the temperature field on each listing before oven or hot-room use.

Medium duty high temperature casters questions

How much weight can medium duty high temperature casters carry?

Single medium duty high temperature casters are rated 600 to 6,000 lb; most fall between 900 and 2,000 lb.

What top plate do medium duty high temperature casters use?

Most medium duty high temperature casters use 4 x 4-1/2 in. Others listed: 4-1/2 x 6-1/4 in.

What wheel material is most common on medium duty high temperature casters?

High-temp phenolic leads on medium duty high temperature casters, rated 600 to 900 lb per caster. Ductile iron is next at 1,500 to 6,000 lb.

Are replacement wheels sold for medium duty high temperature casters?

Yes. Wheel-only listings for medium duty high temperature casters are here, sized 4, 5, 6, 8, 10 and 12 in; check the axle diameter and hub length on the old wheel.

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"

View All • 21 Plate Sizes

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