9mm Bearings | McMaster-Carr

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60 Products

Ball Bearings

Open

Shielded

Sealed

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.

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.

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.

Highly Corrosion-Resistant 316 Stainless Steel—The most corrosion-resistant metal bearings we offer. They won't pit or weaken from salt water or harsh chemicals, such as bleach and chlorine found in cleaning solutions.

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., 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
Open







				Steel

				9	26	8	1	1,000	34,000	-20	230	Standard	629	5972K93	00000




						Corrosion-Resistant 440C Stainless Steel

						9	24	7	3	600	32,000	-40	240	Standard	609	6153K112	00000


						9	26	8	3	820	34,000	-40	240	Standard	629	6153K115	00000




								Highly Corrosion-Resistant 316 Stainless Steel

								9	26	8	Not Rated	120	1,600	-40	140	Standard	629	5908K731	00000


								Shielded







												Steel

												9	24	7	3	880	34,000	-20	230	Standard	609-2Z	4481N012	00000


												9	26	8	1	1,000	28,000	-20	230	Standard	629-2Z	5972K321	0000
												9	26	8	3	1,050	30,000	-20	230	Standard	629-2Z	4481N36	00000




														Corrosion-Resistant 440C Stainless Steel

														9	17	5	5	290	43,000	-40	240	Standard	689-2Z	7804K118	0000


														9	24	7	3	600	32,000	-40	240	Standard	609-2Z	6153K12	00000
														9	26	8	3	820	28,000	-40	240	Standard	629-2Z	6153K53	00000


														Sealed







	Steel

	9																26	8	1	1,000	19,000	-20	230	Standard	629-2RS	5972K231	0000




			Corrosion-Resistant 440C Stainless Steel

			9														24	7	3	600	32,000	-40	240	Standard	609-2RS	6153K68	00000


			9														26	8	3	820	28,000	-40	240	Standard	629-2RS	6153K73	00000

Permanently Lubricated Ball Bearings

Install and forget these self-lubricating bearings. Their lubricant is a solid material that fills the space between the balls and releases oil over time, so you'll never need to add more.

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

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.

							Temp. Range, ° F
	For Shaft Dia., 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
Open







				Steel

				9	26	8	1	790	17,000	10	200	Standard	629	2349K702	000000




						Corrosion-Resistant 440C Stainless Steel

						9	14	3	1	200	26,000	-10	200	Standard	679	4668K136	00000


						9	17	4	1	220	23,000	-10	200	Standard	689	4668K137	00000
						9	20	6	1	320	20,000	-10	200	Standard	699	4668K138	00000


						Sealed







										Steel

										9	26	8	1	790	17,000	10	200	Standard	629-2RS	2349K747	00000




												Corrosion-Resistant 440C Stainless Steel

												9	17	5	1	220	23,000	-10	200	Standard	689-2RS	4668K247	00000


												9	20	6	1	320	20,000	-10	200	Standard	699-2RS	4668K248	00000
												9	24	7	1	580	18,000	-10	200	Standard	609-2RS	4668K249	00000
												9	26	8	1	790	17,000	-10	200	Standard	629-2RS	4668K251	00000

Flanged Ball Bearings

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.

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

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







				Steel

				9	20	6	23	1.5	3	550	42,000	-50	300	Standard	699	57155K516	000000


				9	24	7	27	1.5	3	750	36,000	-50	300	Standard	609	57155K518	00000




						Corrosion-Resistant 440C Stainless Steel

						9	17	4	19	1	3	230	44,000	-50	300	Standard	689	57155K515	00000


						Shielded







										Steel

										9	20	6	23	1.5	3	550	35,000	-50	300	Standard	699-2Z	57155K634	00000


										9	24	7	27	1.5	3	750	30,000	-50	300	Standard	609-2Z	57155K636	00000




												Corrosion-Resistant 440C Stainless Steel

												9	17	5	19	1.1	3	230	37,000	-50	300	Standard	689-2Z	57155K633	00000


												9	17	5	19	1.1	5	290	43,000	-65	250	Standard	689-2Z	7804K148	00000
												9	20	6	23	1.5	3	440	35,000	-50	300	Standard	699-2Z	57155K635	00000

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., mm	For Housing ID, mm	Wd., mm	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



		9	13	8	750	800	26,500	Required	8	-20 to 280	DIN 618, ISO 3245	5905K526	00000


		9	13	10	960	1,050	26,500	Required	8	-40 to 280	DIN 618, ISO 3245	5905K353	0000
		9	13	12	1,150	1,400	26,500	Required	8	-20 to 280	DIN 618, ISO 3245	5905K527	0000

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., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Inner Ring Type		Each
Open







				Corrosion-Resistant 440C Stainless Steel

				9	17	4	7	235	31,000	-30	280	Standard	7487N38	000000


				Shielded







								Corrosion-Resistant 440C Stainless Steel

								9	17	6	7	235	31,000	-30	280	Standard	7487N67	00000

Dry-Running Flanged Sleeve Bearings

Made of naturally slippery plastic so you’ll never have to add lubricant. They’re ideal for clean environments where you need to prevent oil drips or graphite flakes. Compared to metal bearings, they are lighter and will never rust.

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.

Moisture-Resistant Acetal—These bearings won’t warp or swell from humidity or direct contact with water, unlike nylon.

High-Load Ultra-Chemical-Resistant Polyester Fabric-Reinforced PTFE—Woven polyester resin reinforces these PTFE bearings to support loads and speeds comparable to metal bearings. Similar to other PTFE options, they are unaffected by the harsh fluids that other plastics can't handle, including all strong acids and bases.

Ultra-Low-Friction Rulon J—These bearings glide effortlessly for applications with frequent starts and stops, such as conveyor systems.

	For Housing ID, mm	Lg., mm	Flange OD, mm	Flange Thk., mm	Dynamic Radial Load Cap. @ Speed	Dynamic Thrust Load Cap. @ Speed	Color	Temp. Range, ° F		Each
Moisture-Resistant Acetal



	9	12	14	16	2	47 lb. @ 120 rpm	29 lb. @ 120 rpm	White	-40 to 180	2705T88	00000


	High-Load Ultra-Chemical-Resistant Polyester Fabric-Reinforced PTFE



			9	14	10	19	2.5	310 lb. @ 120 rpm	360 lb. @ 120 rpm	Blue	-40 to 150	1523N43	00000


			Ultra-Low-Friction Rulon J



					9	13	10	17	2	90 lb. @ 120 rpm	85 lb. @ 120 rpm	Gold	-400 to 500	6377K317	00000

Thrust Ball Bearings

For silky-smooth motion, the balls inside these bearings roll nearly friction-free. You'll often find them at the end of a shaft or between a stationary and rotating surface, such as on a propeller or rotary table.

These bearings come as three separate pieces—one cage and two washers. The cage holds the balls in place, while the washers create a surface for the balls to roll on. This design is easy to lubricate, but the oil will attract dust and grime since it's exposed.

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

	OD, mm	Thk., mm	Cage Material	Dynamic Thrust Load Cap., lb.	Max. Rotation Speed, rpm	Temp. Range, ° F	Includes		Each
Steel



	9	17	5	Bronze	570	9,000	-60 to 250	Two Washers	7806K64	00000


	9	20	7	Bronze	520	8,000	-60 to 250	Two Washers	7806K65	0000

Ball Bearings for Food and Beverage

Sealed

Food production rolls along smoothly on these bearings. Greased with FDA-compliant lubricant, they’re safe to install on food-processing equipment, such as conveyor belts, so long as they don’t directly touch the food. The lubricant is a solid material that fills the space between the balls and releases oil over time, so you'll never need to add more.

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.

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







				Corrosion-Resistant 440C Stainless Steel

				9	17	5	1	290	23,000	-40	200	Standard	FDA Compliant 21 CFR 178.3570	689-2RS	4648K316	000000

Shaft Liners for Precision Needle-Roller Bearings

Adapt high-precision needle-roller bearings to use on unhardened, unground shafts. The liner fits between the roller and the shaft.

For Shaft Dia., mm	OD, mm	Wd., mm	Ring Material	Lubrication	Specs. Met		Each
9	12	16	Steel	Required	DIN 620	2423K43	00000

Dry-Running Sleeve Bearings for Food and Beverage

Made of plastics permitted by the US FDA for contact with food, these bearings won’t release harmful, smelly, and distasteful impurities into your food or beverage production line. These self-lubricating plastics eliminate the need for oil, resulting in less maintenance and improved hygiene. You’ll find them inside food-processing equipment such as mixers, conveyors, and fillers.

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.

Moisture-Resistant UHMW Polyethylene—Virtually nonabsorbent, these bearings will keep their shape after washdowns. However, they aren’t suitable for high-temperature treatments such as steam cleaning.

	For Housing ID, mm	Lg., mm	Dynamic Radial Load Cap. @ Speed	Color	Temp. Range, ° F	Specs. Met		Each
Moisture-Resistant UHMW Polyethylene



	9	12	14	35 lb. @ 120 rpm	White	-200 to 180	FDA Compliant 21 CFR 177.1520	6657K12	00000

Dry-Running Sleeve Bearings

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.

Moisture-Resistant Acetal—These bearings won’t warp or swell from humidity or direct contact with water, unlike nylon.

Ultra-Chemical-Resistant PTFE—The most chemical-resistant bearings we offer. PTFE is unaffected by the harsh fluids that other plastics can't handle, including all strong acids and bases. PTFE also reduces friction better than nylon but is not as strong.

Ultra-Low-Friction Rulon J—These bearings glide effortlessly for applications with frequent starts and stops, such as conveyor systems.

								Each
	For Shaft Dia., mm	For Housing ID, mm	Lg., mm	Dynamic Radial Load Cap. @ Speed	Color	Temp. Range, ° F		1-24	25-99	100-Up
Moisture-Resistant Acetal



		9	12	14	47 lb. @ 120 rpm	White	-20 to 180	2640T12	00000	00000	00000


		Ultra-Chemical-Resistant PTFE



				9	12	14	17 lb. @ 120 rpm	White	-350 to 500	2685T12	0000	0000	0000


				Ultra-Low-Friction Rulon J



						9	13	10	90 lb. @ 120 rpm	Gold	-400 to 550	6377K517	00000	00000	00000

Flanged Sleeve Bearings

These bearings don’t come with a lubricant, so you can select the oil that meets the needs of your application. You’ll need to refill the oil, so make sure the bearing is located where you can access it. All are fabricated and inspected in the U.S.

High-Load 932 Bearing Bronze—These bearings are strong enough for sudden starts and stops, plus they resist wear and tear. They are cast from an alloy of leaded tin bronze for uniform rigidity and strength. Also known as 660 leaded bronze bearings.

	For Housing ID, mm	Lg., mm	Flange OD, mm	Flange Thk., mm	Dynamic Radial Load Cap. @ Speed	Dynamic Thrust Load Cap. @ Speed	Temp. Range, ° F		Each
High-Load 932 Bearing Bronze



	9	14	6	19	2.5	330 lb. @ 120 rpm	1,050 lb. @ 120 rpm	-350 to 450	5448T508	00000


	9	14	10	19	2.5	550 lb. @ 120 rpm	1,050 lb. @ 120 rpm	-350 to 450	5448T4	0000
	9	14	14	19	2.5	780 lb. @ 120 rpm	1,050 lb. @ 120 rpm	-350 to 450	5448T509	0000

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.

Mineral Oil Base—Mineral oil consistently lubricates at most temperatures but doesn’t last as long as synthetic oil.

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



	9	12	10	270 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6658K141	00000


	9	12	14	390 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6658K142	0000
	9	14	10	270 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6658K143	0000
	9	14	14	390 lb. @ 120 rpm	Mineral Oil	10 to 220	6658K413	0000
	9	14	16	440 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6658K144	0000

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







				Press Fit

				9	9/16"	2 9/32"	25/64"	440	17,000	440C Stainless Steel	Sealed	McMaster-Carr Approved	4491N34	000000


				9	9/16"	2 9/32"	25/64"	440	34,000	440C Stainless Steel	Shielded	McMaster-Carr Approved	8600N115	00000

Dry-Running Ball Bearings

Made of naturally slippery plastic so there's no lubricant to maintain or make a mess. These bearings are ideal for spic-and-span spaces since oil won't drip off, wash out, or collect dust over time. They won't rust or warp from moisture, so they stand up to thorough cleanings.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, reducing wear and extending the life of the bearing.

Acetal—The most common choice for plastic bearings, acetal is economical yet still stands up to daily wear and tear.

316 Stainless Steel Balls—Won't corrode from salt water or harsh chemicals, such as bleach and chlorine found in cleaning solutions.

						Temp. Range, ° F				316 Stainless Steel Balls
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	ABEC Rating	Bearing Trade No.		Each
Open







				Acetal

				9	26	8	40	1,600	-40	180	Not Rated	629	6455K95	000000

Oil-Embedded Thrust Bearings

Our simplest-to-use thrust bearings, with no moving parts and no need to lubricate. Their porous surface releases oil over time, so you can install and forget them. While they run in most conditions, oil may drip away if temperatures climb too high. For extremely hot environments, consider graphite-lubricated bearings. All are fabricated, lubricated, and inspected in the U.S.

841 Bearing Bronze—A balance of strength and speed makes these bearings a good choice for most applications. Also known as SAE 841 bearing bronze.

	OD, mm	Thk., mm	Dynamic Thrust Load Cap. @ Speed	Base Oil	Temp. Range, ° F		Each
841 Bearing Bronze



	9	18	1.5	650 lb. @ 120 rpm	Synthetic Oil	-35 to 300	2011N141	00000

Dry-Running Thrust Bearings

Moisture-Resistant Plastic Blend—Similar to acetal, these bearings won't warp or swell from water or humidity.

	OD, mm	Thk., mm	Dynamic Thrust Load Cap. @ Speed	Color	Temp. Range, ° F		Each
Moisture-Resistant Plastic Blend



	9	18	1.5	31 lb. @ 120 rpm	Gray	-40 to 260	8920N41	00000

Quick-Grip Screw-Clamp Bushings

Also known as Trantorque bushings, these tighten with a twist of the collar nut—no screws needed. As you tighten the collar nut, the inner sleeve contracts onto the shaft and the outer sleeve expands to hold your sprocket, pulley, or gear.

	OD, mm	Overall Wd., mm	Max. Torque, in·lbf		Each
Steel



	9	20	22	450	2298K55	000000