3/32" Bearings | McMaster-Carr

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23 Products

Ball Bearings

Open

Shielded

Smoother than smooth—the balls inside these bearings roll nearly friction-free. You’ll often find them on rapidly rotating parts, from the whirring chuck on a power drill to the spinning shaft on an electric motor.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

Corrosion-Resistant 440C Stainless Steel—Combine the strength of steel with the corrosion resistance of stainless steel. These bearings won't degrade from water or mild chemicals, such as the ammonia in cleaning solutions. However, they'll weaken when exposed to salt water and harsh chemicals, such as bleach.

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 Dia.	For Housing ID	Wd.	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Inner Ring Type	Bearing Trade No.		Each
Open







				Corrosion-Resistant 440C Stainless Steel

				3/32"	3/16"	1/16"	5	40	95,000	-40	240	Standard	R133	57155K344	00000


				3/32"	5/16"	7/64"	5	120	71,000	-40	240	Standard	R1-5	57155K345	0000


				Shielded







								Corrosion-Resistant 440C Stainless Steel

								3/32"	3/16"	3/32"	5	30	95,000	-40	240	Standard	R133-2Z	57155K363	0000


								3/32"	3/16"	3/32"	5	30	95,000	-40	240	Extended	R133-2Z	57155K13	00000
								3/32"	5/16"	9/64"	5	120	71,000	-40	240	Standard	R1-5-2Z	57155K364	0000
								3/32"	5/16"	9/64"	5	120	71,000	-40	240	Extended	R1-5-2Z	57155K381	0000

Flanged Ball Bearings

Open

Shielded

Install these bearings inside a housing and they won't budge. The flange presses against the housing wall, so vibration and other sudden forces parallel to the shaft (thrust loads) won't knock them off-kilter.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

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







				Corrosion-Resistant 440C Stainless Steel

				3/32"	3/16"	1/16"	0.234"	0.02"	5	40	95,000	-65	250	Standard	R133	57155K203	00000


				3/32"	5/16"	7/64"	0.359"	0.02"	5	120	71,000	-65	250	Standard	R1-5	57155K204	0000


				Shielded







								Corrosion-Resistant 440C Stainless Steel

								3/32"	3/16"	3/32"	0.234"	0.03"	5	30	95,000	-65	250	Standard	R133-2Z	57155K311	0000


								3/32"	3/16"	3/32"	0.234"	0.03"	5	30	95,000	-65	250	Extended	R133-2Z	57155K327	00000
								3/32"	5/16"	9/64"	0.359"	0.03"	5	120	71,000	-65	250	Standard	R1-5-2Z	57155K312	00000
								3/32"	5/16"	9/64"	0.359"	0.03"	5	120	71,000	-65	250	Extended	R1-5-2Z	57155K328	00000

High-Precision Ball Bearings

Open

Shielded

The most precise bearings we offer, with tolerances tighter than a speck of dust. Rated ABEC 7 out of 9, they meet strict tolerance standards established by the Annular Bearing Engineers Committee (ABEC). You'll find them in equipment that requires both high speed and pinpoint accuracy, such as gyroscopes.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

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







				Corrosion-Resistant 440C Stainless Steel

				3/32"	3/16"	1/16"	7	20	100,000	-10	240	Standard	R133	3826T5	000000


				3/32"	5/16"	7/64"	7	75	74,000	-10	240	Standard	R1-5	3826T6	00000


				Shielded







								Corrosion-Resistant 440C Stainless Steel

								3/32"	3/16"	3/32"	7	15	34,000	-10	240	Standard	R133-2Z	3759T44	00000


								3/32"	5/16"	9/64"	7	60	34,000	-10	240	Standard	R1-5-2Z	3759T45	00000

Oil-Embedded Sleeve Bearings

Install and forget these self-lubricating bearings. All are made from porous metal and saturated with oil to reduce maintenance and downtime. A good all-around choice, they are used in everything from palm-sized fans in electronics to tire-sized pulleys. Although these bearings will work in most conditions, oil may drip away if temperatures get too high. Consider a graphite-lubricated bearing for higher temperatures or places where you can’t afford the mess. All are fabricated, lubricated, and inspected in the U.S.

With no moving parts, sleeve bearings are the simplest way to support the load of a rotating shaft while reducing friction. Also known as plain bearings.

841 Bearing Bronze—A classic choice for a starter pick. Also known as SAE 841 bearings.

Synthetic Oil Base—A high-quality lubricant makes all the difference. Synthetic oil is less sensitive to temperature changes than mineral oil, so it won't get runny and leak away at higher temperatures.

	For Housing ID	Lg.	Dynamic Radial Load Cap. @ Speed	Base Oil	Temp. Range, ° F		Each
841 Bearing Bronze



	3/32"	1/4"	1/4"	46 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6391K484	000000

Mounted Ball Bearings

Smoother than smooth—the balls inside these bearings roll nearly friction-free. The sturdy housing bolts down to support shafts as they turn.

Lubricate regularly to keep your bearing in tip-top shape. Bearings with seals and shields keep lubricants in and contaminants out, and come packed with grease. Open bearings require initial lubrication and offer less protection against dust and debris.

Aluminum Housing—One-third the weight of cast iron but not as strong. Aluminum also resists corrosion.

Press Fit—For a tight connection to the shaft, install with a press or by heating and then cooling the bearing. Also known as an interference fit.

			Overall
	For Shaft Dia.	Ctr. Ht.	Lg.	Wd.	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Bearing Material	Bearing Seal Type	Manufacturer		Each
Aluminum Housing







				Press Fit

				3/32"	3/8"	1 29/64"	13/64"	95	60,000	440C Stainless Steel	Shielded	McMaster-Carr Approved	8600N101	000000

High-Precision Flanged Ball Bearings

Open

Shielded

Our most precise flanged ball bearings, with tolerances tighter than a speck of dust. Rated ABEC 7 out of 9, they meet strict tolerance standards established by the Annular Bearing Engineers Committee (ABEC). Choose them for high-speed equipment that requires pinpoint accuracy, such as gyroscopes. Their flange presses against the housing wall, so vibration and other sudden forces parallel to the shaft (thrust loads) won't knock them off-kilter.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

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







				Corrosion-Resistant 440C Stainless Steel

				3/32"	3/16"	1/16"	0.234"	0.02"	7	20	100,000	-10	240	Standard	R133	4259T4	000000


				3/32"	5/16"	7/64"	0.359"	0.02"	7	75	74,000	-10	240	Standard	R1-5	4259T5	00000


				Shielded







								Corrosion-Resistant 440C Stainless Steel

								3/32"	3/16"	3/32"	0.234"	0.03"	7	15	34,000	-60	250	Standard	R133-2Z	4262T24	00000


								3/32"	5/16"	9/64"	0.359"	0.03"	7	60	34,000	-60	250	Standard	R1-5-2Z	4262T25	00000

Oil-Embedded Flanged Sleeve Bearings

Flanged sleeve bearings combine a sleeve and thrust bearing in one. The flange supports thrust loads and prevents the bearing from being pushed out of place. The sleeve is the simplest way to support the load of a rotating shaft while reducing friction. Also known as plain bearings.

841 Bearing Bronze—A classic choice for a starter pick. Also known as SAE 841 bearings.

	For Housing ID	Lg.	Flange OD	Flange Thk.	Dynamic Radial Load Cap. @ Speed	Dynamic Thrust Load Cap. @ Speed	Base Oil	Temp. Range, ° F		Each
841 Bearing Bronze



	3/32"	1/4"	1/4"	3/8"	1/16"	46 lb. @ 120 rpm	205 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6338K324	000000