Square-Bore Bearings | McMaster-Carr

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Shaft Type

Round with Support Rail

System of Measurement

Shaft Width

Bearing Seal Type

Width

Ball Bearing Profile

Bearing Trade Number

Square Width

Inner Ring OD

For Load Direction

Bearing Type

Maximum Rotation Speed

Inner Ring Type

Inner Ring Width

Lubrication

Material

Dynamic Radial Load Capacity

Less than 10,000 lb.

10,000 lb. to 19,999 lb.

Bearing Construction

Single Row

Shaft Mount Type

Slip Fit

Maximum Temperature

Less than 250° F

Radial Clearance Trade Number

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

RoHS

4 Products

Square-Bore Ball Bearings

The inside corners of these bearings grip square shafts as they turn, so you don't need set screws to hold them in place. They're a good choice when your setup needs to come apart frequently, since there aren't extra mounting steps.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

Extended Inner Ring—Connect to mating parts without the need for a spacer. The inner ring juts out farther than the outer ring, so shaft collars and other objects won't touch the bearing's moving parts.

ABEC Rating—Bearings with an ABEC rating meet industry tolerance standards established by the Annular Bearing Engineers Committee (ABEC). They're rated on a scale from 1 to 9. The higher the rating, the tighter the tolerance. Bearings rated ABEC 1 or 3 are precise enough for most applications. If your application consistently runs at high speeds or requires high accuracy, consider bearings rated ABEC 5 or higher, since they generate less friction and heat.

							Temp. Range, ° F
	For Shaft Wd., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Inner Ring Type	Bearing Trade No.		Each
Sealed







				Steel

				26	80	18	1	7,300	500	-20	200	Extended	W208PP6	0000000	000000


				29.5	80	18	1	7,300	500	-20	200	Extended	W208PP5	0000000	00000
				38.5	100	33.3	1	9,750	500	-20	200	Extended	GW211PP17	0000000	00000
				45	110	38.2	1	11,800	500	-20	200	Extended	GW212PP50	0000000	000000