5/32" ID Bearings | McMaster-Carr

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

				5/32"	5/16"	7/64"	5	80	63,000	-40	240	Standard	R155	57155K351	00000


				Shielded







								Corrosion-Resistant 440C Stainless Steel

								5/32"	5/16"	1/8"	5	80	63,000	-40	240	Standard	R155-2Z	57155K371	0000


								5/32"	5/16"	1/8"	5	80	63,000	-40	240	Extended	R155-2Z	57155K15	0000

Needle-Roller Bearings

Also known as drawn-cup roller bearings, these are our thinnest roller bearings. The outer ring is drawn out to form a lip that holds the bearing together. Bearings take on the shape of their housing and may be oblong prior to installation.

Open Bearing—Open bearings dissipate heat more efficiently than sealed bearings.

				Radial Load Cap., lb.
	For Shaft Dia.	For Housing ID	Wd.	Dynamic	Static	Max. Rotation Speed, rpm	Lubrication	For Shaft Surface Smoothness, Ra, μin	Temp. Range, ° F	Specs. Met		Each
For Radial Load—Open with Steel Ring



		5/32"	9/32"	1/4"	280	210	44,000	Required	8	-20 to 280	ISO 281, ISO 76	5905K491	000000

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

				5/32"	5/16"	7/64"	0.359"	0.02"	5	80	63,000	-65	250	Standard	R155	57155K208	00000


				Shielded







								Corrosion-Resistant 440C Stainless Steel

								5/32"	5/16"	1/8"	0.359"	0.04"	5	80	63,000	-65	250	Standard	R155-2Z	57155K317	0000


								5/32"	5/16"	1/8"	0.359"	0.04"	5	80	63,000	-65	250	Extended	R155-2Z	57155K2	00000

Corrosion-Resistant Swivel Joints

Ball is heat treated for strength. Also known as spherical bearings, they support angular misalignment. Press them into a hole or housing where a ball joint rod end won’t fit. They don't come lubricated, so you'll need to lubricate during installation and on an ongoing basis.

303 Stainless Steel—Stronger than plastic models, these stainless steel swivel joints are also more corrosion resistant than steel joints.

OD	Overall Thk.	Housing Thk.	Max. Ball Swivel	Static Radial Load Cap., lb.	Material		Each



5/32"	15/32"	1/4"	3/16"	18°	3,200	303 Stainless Steel	63215K22	000000

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

				5/32"	5/16"	7/64"	7	55	68,000	-10	240	Standard	R155	3826T11	000000


				Shielded







								Corrosion-Resistant 440C Stainless Steel

								5/32"	5/16"	1/8"	7	40	20,000	-10	240	Standard	R155-2Z	3759T52	00000

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

				5/32"	3/8"	1 29/64"	13/64"	65	26,500	440C Stainless Steel	Sealed	McMaster-Carr Approved	4491N12	000000


				5/32"	3/8"	1 29/64"	13/64"	65	53,000	440C Stainless Steel	Shielded	McMaster-Carr Approved	8600N102	00000

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

				5/32"	5/16"	7/64"	0.359"	0.02"	7	55	68,000	-10	240	Standard	R155	4259T9	000000


				Shielded







								Corrosion-Resistant 440C Stainless Steel

								5/32"	5/16"	1/8"	0.359"	0.04"	7	40	20,000	-60	250	Standard	R155-2Z	4262T31	00000

Corrosion-Resistant Fully Threaded Rod End Bolts

Brass

303 Stainless Steel

Black-Oxide 303

Stainless Steel

17-4 PH Stainless

Steel

316 Stainless Steel

Image of Attribute. Front orientation. Contains Annotated, MultipleImages. Corrosion-Resistant Fully Threaded Rod End Bolts.

These rod end bolts are good for wet and corrosive environments—for maximum mounting flexibility, cut the fully threaded shaft to whatever length you need. Also known as swing bolts and eyebolts, rod end bolts have no moving parts. They're designed to make pivoting or hinge movements in applications that don't need to compensate for misalignment.

Brass—Brass rod end bolts resist corrosion in humid and wet environments, but not as well as stainless steel bolts. They're also not as strong. Often, brass bolts are chosen for their look, or to match other components, such as hinges.

303 Stainless Steel—303 and 304 stainless steel rod end bolts won't rust in humid, wet, and washdown environments. They're stronger than brass bolts and nearly as strong as steel. They will rust when exposed to salt water and chemicals, however.

Black-Oxide 303 Stainless Steel—Black-oxide 303 stainless steel rod end bolts have a matte-black finish that adds some corrosion resistance but is mostly chosen for its looks.

17-4 PH Stainless Steel—17-4 PH stainless steel rod end bolts have the most tensile strength—a similar amount to high-strength alloy steel. They also won’t rust in humid, wet, and washdown environments. Even at high temperatures, they maintain their excellent strength and corrosion resistance, so they’re often used in automotive drive trains and heat exchangers. However, they’ll rust when exposed to salt water and chemicals.

316 Stainless Steel—316 stainless steel rod end bolts are our most corrosion resistant, and they're nearly as strong as steel rod end bolts. Use them in areas with salt water, chlorine, and chemicals without worrying about rust.

ASTM A276, ASTM A564, ASTM A582, and ASTM B16—ASTM rod end bolts meet a standard for material.

	Shank
	Thread Size	Ctr. Lg.	Thread Lg.	ID	Overall Wd.	Shank Threading	Overall Thk.	Tensile Strength, psi	Specs. Met		Each
Right-Hand Shank Thread







				Brass

				8-32	1"	3/4"	5/32"	5/16"	Fully Threaded	3/16"	55,000	ASTM B16	2434K671	00000


				8-32	1 1/2"	1 1/4"	5/32"	5/16"	Fully Threaded	3/16"	55,000	ASTM B16	2434K672	0000




						303 Stainless Steel

						8-32	1"	3/4"	5/32"	5/16"	Fully Threaded	3/16"	90,000	ASTM A582	2434K484	0000


						8-32	1 1/2"	1 1/4"	5/32"	5/16"	Fully Threaded	3/16"	90,000	ASTM A582	2434K485	0000
						8-32	2"	1 3/4"	5/32"	5/16"	Fully Threaded	3/16"	90,000	ASTM A582	2434K486	0000




								Black-Oxide 303 Stainless Steel

								8-32	1"	3/4"	5/32"	5/16"	Fully Threaded	3/16"	90,000	ASTM A582	2434K747	0000


								8-32	1 1/2"	1 1/4"	5/32"	5/16"	Fully Threaded	3/16"	90,000	ASTM A582	2434K748	0000




										17-4 PH Stainless Steel

										8-32	1 1/2"	1 1/4"	5/32"	5/16"	Fully Threaded	3/16"	160,000	ASTM A564	2434K595	0000




												316 Stainless Steel

												8-32	1"	3/4"	5/32"	5/16"	Fully Threaded	3/16"	75,000	ASTM A276	2434K527	0000


												8-32	1 1/2"	1 1/4"	5/32"	5/16"	Fully Threaded	3/16"	75,000	ASTM A276	2434K528	0000

Ball Joint Rod Ends

Made of steel, these rod ends generally handle higher loads than stainless steel, aluminum, and nylon rod ends. They don’t come lubricated, so you’ll need to lubricate during installation and on an ongoing basis.

	Shank
	Thread Size	Ctr. Lg.	Thread Lg.	ID	Max. Ball Swivel	Overall Wd.	Overall Thk.	Static Radial Load Cap.	Material	Shank Thread Direction		Each
Ball Joints



		8-32	1"	9/16"	5/32"	30°	7/16"	1/4"	Not Rated	Carbon Steel	Right Hand	60645K98	00000

Internally Threaded Ball Joint Rod Ends

Made of steel, these rod ends generally handle higher loads than stainless steel, aluminum, and nylon rod ends. They don’t come lubricated, so you’ll need to lubricate them during installation and on an ongoing basis.

	Shank
	Thread Size	Ctr. Lg.	Thread Lg.	ID	Max. Ball Swivel	Overall Wd.	Overall Thk.	Static Radial Load Cap.	Material	Shank Thread Direction		Each
Ball Joints



		8-32	7/8"	3/8"	5/32"	30°	7/16"	5/16"	Not Rated	Carbon Steel	Right Hand	60645K97	00000

Ultra-Precision Ball Joint Rod Ends

Made to extremely tight tolerances, these rod ends are for applications that require positioning accuracy, such as accelerators and other types of control linkages. Rod ends are steel and generally handle higher loads than stainless steel, aluminum, and nylon rod ends. They have a heat-treated steel ball for added strength and a brass insert for smooth operation. They come lubricated, so you won't need to lubricate them at installation.

Cadmium-Plated Carbon Steel—Zinc- and cadmium-plated rod ends provide moderate corrosion resistance.

	Shank
	Thread Size	Ctr. Lg.	Thread Lg.	ID	Max. Ball Swivel	Overall Wd.	Overall Thk.	Static Radial Load Cap., lb.	Material	Shank Thread Direction		Each
Ball Joints



		8-32	1 1/8"	5/8"	5/32"	12°	9/16"	9/32"	650	Cadmium-Plated Carbon Steel	Right Hand	6130K11	0000000

Internally Threaded Ultra-Precision Ball Joint Rod Ends

Cadmium-Plated Carbon Steel—Zinc- and cadmium-plated rod ends provide moderate corrosion resistance.

	Shank
	Thread Size	Ctr. Lg.	Thread Lg.	ID	Max. Ball Swivel	Overall Wd.	Overall Thk.	Static Radial Load Cap., lb.	Material	Shank Thread Direction		Each
Ball Joints



		8-32	7/8"	3/8"	5/32"	12°	9/16"	9/32"	1,700	Cadmium-Plated Carbon Steel	Right Hand	6130K31	000000

High-Strength Fully Threaded Rod End Bolts

These alloy steel rod end bolts have the highest tensile strength of any steel fully threaded rod end bolt we offer. For maximum mounting flexibility, cut the fully threaded shaft to whatever length you need. Also known as swing bolts and eyebolts, rod end bolts have no moving parts. They're designed to make pivoting or hinge movements in applications that don't need to compensate for misalignment.

	Shank
	Thread Size	Ctr. Lg.	Thread Lg.	ID	Overall Wd.	Shank Threading	Overall Thk.	Tensile Strength, psi	Specs. Met	Fastener Strength Grade/Class		Each
Right-Hand Shank Thread







				Black-Oxide Alloy Steel

				8-32	1 1/2"	1 1/4"	5/32"	5/16"	Fully Threaded	3/16"	125,000	ASTM A193	ASTM Grade B7	2440K62	00000