Precision Sealed Ball Bearings

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.

Bearing	ID	OD
3/8 in or 15 mm bore	3/8 in or 15 mm	35 mm
1/2 in or 17 mm bore	1/2 in or 17 mm	40 mm
1/2 in or 20 mm bore	1/2 in or 20 mm	47 mm
3/4 in or 25 mm bore	3/4 in or 25 mm	52 mm

Bearing

3/8 in or 15 mm bore

3/8 in or 15 mm

35 mm

1/2 in or 17 mm bore

1/2 in or 17 mm

40 mm

1/2 in or 20 mm bore

1/2 in or 20 mm

47 mm

3/4 in or 25 mm bore

3/4 in or 25 mm

52 mm

Sealed bearing questions

What sizes of sealed bearing are listed?

35, 40, 47 and 52 mm OD, for 3/8 to 3/4 in axles.

Why are two bore sizes listed for each bearing?

Each is listed with an inch axle size and its metric bore.

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.

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

Plate Casters

Stem Casters

Stainless Casters

Ergonomic Casters

Leveling Casters

Precision Sealed Ball Bearings

Bearings by size

Before you order

Sealed bearing questions

Sources