9mm OD Bearings | McMaster-Carr

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.

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.

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







				Corrosion-Resistant 440C Stainless Steel

				3	9	3	1	65	50,000	-10	200	Standard	603	4668K107	000000


				4	9	2.5	1	80	46,000	-10	200	Standard	684	4668K113	00000


				Sealed







								Corrosion-Resistant 440C Stainless Steel

								4	9	4	1	80	46,000	-10	200	Standard	684-2RS	4668K337	00000

Ball Bearings

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.

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	Bearing Trade No.		Each
Shielded







				Corrosion-Resistant 440C Stainless Steel

				5	9	3	5	95	60,000	-40	240	Standard	95-2Z	7804K105	00000

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.

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

				5	9	2.5	10.2	0.6	3	90	71,000	-50	300	Standard	95	57155K457	000000




						Corrosion-Resistant 440C Stainless Steel

						4	9	2.5	10.3	0.6	3	120	75,000	-50	300	Standard	684	57155K443	00000


						5	9	2.5	10.2	0.6	3	70	71,000	-50	300	Standard	95	57155K458	00000


						Shielded







										Steel

										3	9	5	10.5	1	3	120	66,000	-50	300	Standard	603-2Z	57155K546	00000


										5	9	3	10.2	0.6	3	90	60,000	-50	300	Standard	95-2Z	57155K643	00000




												Corrosion-Resistant 440C Stainless Steel

												5	9	3	10.2	0.6	5	95	60,000	-20	250	Standard	95-2Z	7804K135	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., 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



		5	9	9	540	440	39,000	Required	8	-40 to 280	DIN 618, ISO 3245	5905K349	00000

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

				4	9	4	1	140	46,000	-40	200	Standard	FDA Compliant 21 CFR 178.3570	684-2RS	4648K312	000000

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.

Stainless Steel—These bearings won't degrade from water or mild chemicals, such as the ammonia in cleaning solutions. However, they're not as strong as steel bearings.

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



	4	9	4	Bronze	160	12,000	-60 to 250	Two Washers	7806K54	00000


	4	9	4.13	Nylon	50	5,000	-40 to 220	Two Washers	6655K47	0000


	Stainless Steel



			4	9	4.13	Nylon	35	5,000	-40 to 220	Two Washers	6655K91	0000

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.

Nylon—The most popular choice, nylon is wear resistant yet economical. Keep in mind, though, that it will swell and weaken when exposed to moisture.

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.

	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	Specs. Met		Each
Nylon



	6	9	6	12	1.5	22 lb. @ 120 rpm	26 lb. @ 120 rpm	White	-20 to 210	—	6389K484	00000


	6	9	10	12	1.5	37 lb. @ 120 rpm	26 lb. @ 120 rpm	White	-20 to 210	—	6389K471	0000
	6	9	12	12	1.5	44 lb. @ 120 rpm	26 lb. @ 120 rpm	White	-20 to 210	—	6389K472	0000
	6	9	16	12	1.5	55 lb. @ 120 rpm	26 lb. @ 120 rpm	White	-20 to 210	—	6389K473	0000


	Ultra-Chemical-Resistant PTFE



			6	9	10	12	1.5	12 lb. @ 120 rpm	8.5 lb. @ 120 rpm	White	-200 to 450	FDA Compliant 21 CFR 177.1550	2706T514	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.

Nylon—The most popular choice, nylon is wear resistant yet economical. Keep in mind, though, that it will swell and weaken when exposed to moisture.

High-Load PEEK—Get the strength of reinforced PTFE without compromising on heat resistance. With no additives, such as polyester fabric, PEEK bearings won’t melt at high temperatures. They’re also nearly as slippery and chemical resistant as plain PTFE.

High-Load Moisture-Resistant Rulon LR—Won’t swell in wet or humid places, similar to acetal, but can support higher loads. These bearings also operate smoothly from cryogenic to oven-like temperatures.

								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
Nylon



		6	9	4	12 lb. @ 120 rpm	Off-White	-10 to 220	6389K706	000000	00000	00000


		6	9	6	18 lb. @ 120 rpm	Off-White	-10 to 220	6389K707	00000	0000	0000
		6	9	10	31 lb. @ 120 rpm	Off-White	-10 to 220	6389K709	00000	0000	0000
		6	9	12	37 lb. @ 120 rpm	Off-White	-10 to 220	6389K71	00000	0000	0000
		6	9	16	50 lb. @ 120 rpm	Off-White	-10 to 220	6389K711	00000	00000	0000


		High-Load PEEK



				6	9	8	140 lb. @ 120 rpm	Gold	-20 to 480	7922N112	00000	00000	00000


				High-Load Moisture-Resistant Rulon LR



						6	9	8	70 lb. @ 120 rpm	Maroon	-400 to 500	7763K712	00000	00000	00000

Clear Ultra-Impact-Resistant Polycarbonate Round Tubes

Comparable to Lexan, Hyzod, Tuffak, and Makrolon, these polycarbonate tubes are half the weight of glass and maintain excellent impact resistance across a wide temperature range. Use them to make instrument gauge covers and display racks.

Metric

Image of Product. Front orientation. Plastic. Clear Ultra-Impact-Resistant Polycarbonate Round Tubes.

									8 ft. Long
	OD, mm	ID, mm	Fabrication	Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Flammability Rating	Food Industry Std.		Each
1.000 mm Thick Wall (-0.130 mm to 0.130 mm Tolerance)



		9	7	Extruded	-40 to 200	8,900 to 9,500	12 to 18	UL 94 HB	FDA Standard	8585K821	00000


		1.500 mm Thick Wall (-0.130 mm to 0.130 mm Tolerance)



				9	6	Extruded	-40 to 200	8,900 to 9,500	12 to 18	UL 94 HB	FDA Standard	8585K825	0000

Dry-Running Thrust 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'll also never rust.

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



	4	9	0.6	8.5 lb. @ 120 rpm	Gray	-40 to 260	8920N23	00000