Up to 350 lbs
Up to 7,000 lbs
Up to 16,000 lbs
Up to 40,000 lbs
Shock absorbing
Outdoor / rough terrain
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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.





| Tread | Core | Wheel sizes | Rated per caster | Listed temperature | Where it fits |
|---|---|---|---|---|---|
| Semi-steel | 3, 4 and 5 in | 300 to 350 lb | -45°F to 180°F | rough floors, heat and heavy loads | |
| Cast iron | 3-1/2 in | 300 lb | heat, chips and heavy loads on rough floors |
Ratings are for single casters of 1/2-13 threaded stem casters with steel wheels, from product fields [S1].
| Wheel | Treads | Rated |
|---|---|---|
| 3 x 1-1/4 in | semi-steel | 300 to 350 lb |
| 3-1/2 x 1-1/4 in | cast iron | 300 lb |
| 4 x 1-1/4 in | semi-steel | 300 lb |
| 5 x 1-1/4 in | semi-steel | 300 lb |
Related: caster wheels.
Single 1/2-13 threaded stem casters with steel wheels are rated 300 to 350 lb.
Most 1/2-13 threaded stem casters with steel wheels list 1/2-13 x 1-1/2 in.
Semi-steel leads on 1/2-13 threaded stem casters with steel wheels, rated 300 to 350 lb per caster. Cast iron is next at 300 lb.
Jordan Wilson, CasterHQ · reviewed October 20, 2026 · 844-439-4335 · info@casterhq.com
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