50 mm 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.

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
Sealed







				Corrosion-Resistant 440C Stainless Steel

				40	50	6	1	560	6,000	-10	200	Standard	6708-2RS	4668K261	0000000

Ball Bearings

Open

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.

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

				40	50	6	1	560	5,000	-50	130	Standard	6708	6656K129	000000

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



	35	50	43	5,950	2298K74	0000000

Grooved Sleeve Bearings

A figure-8-shaped groove provides a flow path for lubricant and distributes it evenly inside the bearing’s surface. A refill hole on the outside lets you inject your lubricant straight into the groove. 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.

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.

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	Dynamic Radial Load Cap. @ Speed	Temp. Range, ° F		Each
High-Load 932 Bearing Bronze



	40	50	50	10,850 lb. @ 30 rpm	-350 to 450	7965K853	000000


	40	50	65	14,100 lb. @ 30 rpm	-350 to 450	7965K854	00000
	40	50	75	16,250 lb. @ 30 rpm	-350 to 450	7965K855	00000
	40	50	100	21,700 lb. @ 30 rpm	-350 to 450	7965K856	00000
	45	50	75	18,300 lb. @ 30 rpm	-350 to 450	7965K858	00000

Swivel Joints


Open Bearing

Also known as spherical bearings, swivel joints support angular misalignment. Press them into a hole or housing where a ball joint rod end won’t fit. They need to be lubricated when first installed and periodically after that. Apply any type of bearing grease to the ball, and rotate it to work it into the races.

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



	22	50	28	20	30°	70,850	Alloy Steel	4158N14	000000

Bearing Locknuts

Carbon Steel

With a nylon insert that grips your threaded shaft or spindle without damaging its threads, these locknuts—also called shaft nuts—hold bearings, bushings, gears, and pulleys prone to vibration tightly in place. They come as one piece, so you can easily clamp them onto your shaft or spindle. But, since they aren’t made entirely of metal, they don’t stand up to heat as well as all-metal locknuts. Slots in their sides mean you can tighten and loosen them with a spanner wrench or spanner socket. Their face is also chamfered to help keep the size and weight of your assembly at a minimum. All meet international standards for bearing locknut dimensions.

Zinc-Plated Carbon Steel—Zinc-plated carbon steel locknuts resist rusting from some moisture, but you shouldn’t use them with salt water or chemicals. They are strong and resist wear, though they don’t stand up to corrosion as well as 303 stainless steel locknuts.

Thread Spacing—When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.

	Thread					Zinc-Plated Carbon Steel
	Size	Spacing	OD, mm	Wd., mm	Insert Max. Temp., ° F		Each
Chamfered Face



		M32 × 1.5 mm	Extra Fine	50	11	210	3552N36	000000


		M34 × 1.5 mm	Extra Fine	50	11	210	3552N37	00000
		M35 × 1.5 mm	Extra Fine	50	11	210	3552N38	00000

Dry-Running Flanged 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.

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 Plastic Blend—Similar to UHMW, these bearings will keep their shape after washdowns but won’t hold up to steam cleaning. They're bright blue so they are easy to spot if they fall into your production line.

	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	Food Industry Std.		Each
Moisture-Resistant Plastic Blend



	45	50	50	58	2	500 lb. @ 30 rpm	235 lb. @ 30 rpm	Blue	-50 to 190	FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 178.3297	57785K353	000000

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.

Moisture-Resistant Ultra-Low-Friction Plastic Blend—These bearings won't warp or swell from humidity or direct contact with water. They 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 Ultra-Low-Friction Plastic Blend



	45	50	20	58	2	970 lb. @ 30 rpm	880 lb. @ 30 rpm	Yellow	-50 to 190	2705T188	00000

High-Temperature Graphite-Lubricated Thrust Bearings

Keep parts spinning in temperatures as hot as 750° F. Lubricated with graphite, these bearings stay slippery where oil would burn off or solidify. You can install and forget them since the lubricant lasts forever. All are fabricated, lubricated, and inspected in the U.S.

High-Load 932 Bearing Bronze—Cast from an alloy of leaded tin bronze for uniform rigidity and strength. Also known as 660 leaded bronze.

	OD, mm	Thk., mm	Dynamic Thrust Load Cap. @ Speed	Temp. Range, ° F		Each
High-Load 932 Bearing Bronze



	25	50	3	4,100 lb. @ 60 rpm	-350 to 450	2855T118	000000


	30	50	3	6,800 lb. @ 30 rpm	-350 to 450	2855T119	00000

Thrust Bearings

With no moving parts, these bearings are the plainest way to support thrust loads while reducing friction. They don't come with lubricant, so you can choose the oil that's best for your application. Make sure to mount them where they're easy to access, since you'll need to replenish the oil frequently. All are fabricated and inspected in the U.S.

High-Load 932 Bearing Bronze—Cast from an alloy of leaded tin bronze for uniform rigidity and strength. Also known as 660 leaded bronze.

High-Load Chemical-Resistant 954 Bearing Bronze—The addition of iron and aluminum makes these bearings strong and exceptionally chemical resistant. You'll find them in demanding environments, such as salt mines. Also known as aluminum bronze.

	OD, mm	Thk., mm	Dynamic Thrust Load Cap. @ Speed	Temp. Range, ° F		Each
High-Load 932 Bearing Bronze



	25	50	3	Not Rated	-350 to 450	7814K46	00000


	High-Load Chemical-Resistant 954 Bearing Bronze



			30	50	3	Not Rated	-350 to 500	2872T65	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.

								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



		40	50	25	310 lb. @ 30 rpm	Off-White	-10 to 220	6389K942	000000	000000	000000


		40	50	50	620 lb. @ 30 rpm	Off-White	-10 to 220	6389K946	00000	00000	00000

Corrosion-Resistant Flush-Mount Screw-Clamp Bushings

Insert these nickel-plated steel bushings into the bore of your sprocket for flush or recessed mounting in wet environments. When you tighten the included clamping screws on these bushings, their inner sleeve contracts onto the shaft and their outer sleeve expands to hold your sprocket, pulley, or gear. This keeps bushings from slipping during sudden starts and stops.

	OD, mm	Overall Wd., mm	Max. Torque, in·lbf	Fastener Tightening Torque, in·lbf	Includes		Each
Nickel-Plated Steel



	25	50	26	3,750	150	Clamping Screws	5515N11	0000000

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.

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 if the bearing heats up.

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



	25	50	3	3,650 lb. @ 60 rpm	Synthetic Oil	-35 to 300	2011N129	00000


	25	50	4	3,650 lb. @ 60 rpm	Synthetic Oil	-35 to 300	2011N131	00000

Ultra-Low-Friction Oil-Embedded Thrust Bearings

Our slipperiest metal thrust bearings glide on machines with frequent starts and stops, such as conveyors. Their oil contains nonstick PTFE particles that reduce wear and heat, extending the life of your equipment. 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.

High-Load 863 Iron Copper—Iron makes these bearings harder, stronger, and more resistant to sudden starts and stops than 841 bearing bronze. However, they run at slower speeds. The increased iron content also makes them appear silver.

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



	25	50	3	3,650 lb. @ 60 rpm	Synthetic Oil	PTFE	-60 to 300	ASTM B438	7421K61	00000


	25	50	4	3,650 lb. @ 60 rpm	Synthetic Oil	PTFE	-60 to 300	ASTM B438	7421K62	00000


	High-Load 863 Iron Copper



			25	50	4	2,550 lb. @ 60 rpm	Synthetic Oil	PTFE	-60 to 300	—	7380N31	00000

Corrosion-Resistant Flanged Screw-Clamp Bushings

Made from stainless steel or plated with nickel, these bushings resist corrosion. A mounting flange prevents movement during tightening. As screw-clamp bushings, they're good for shock loads. When you tighten the clamping screws, the bushing's inner sleeve tightens onto the shaft and the outer sleeve expands to hold your sprocket, pulley, or gear.

Nickel-Plated Steel—Nickel-plated steel bushings have good corrosion resistance in wet environments. However, the plating may begin to flake with long-term use.

Stainless Steel—Stainless steel bushings have excellent corrosion resistance and can withstand prolonged exposure to moisture.

	OD, mm	Overall Wd., mm	Max. Torque, in·lbf	Fastener Tightening Torque, in·lbf	Includes		Each
Nickel-Plated Steel



	25	50	38	2,100	70	Clamping Screws	5530N25	0000000


	Stainless Steel



			25	50	38	1,700	60	Clamping Screws	5530N111	000000

Thin-Profile Bearing Nuts

Used in pairs or with another bearing nut, these thin-profile nuts—often called shaft nuts—hold bearings, bushings, pulleys, and gears in place on your threaded shaft or spindle. Threading two nuts tightly against each other makes it harder for vibration to loosen your assembly than if you used only one nut. For the nut closer to the bearing, position the stepped face towards the bearing. These thin-profile nuts have holes on the side, so you can tighten and loosen them with a pin spanner wrench. All meet DIN 1816, an international standard for bearing locknut dimensions.

Carbon Steel—Carbon steel bearing nuts are strong and resist wear.

Thread Spacing—When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.

	Thread
	Size	Spacing	OD, mm	Wd., mm	Specs. Met		Each
Carbon Steel







				Stepped Face

				M28 × 1.5 mm	Extra Fine	50	10	DIN 1816	3549N21	000000


				M30 × 1.5 mm	Extra Fine	50	10	DIN 1816	3549N22	00000

Bearing Nuts

Carbon Steel

Stepped Face

Often paired with spring lock washers to strengthen their hold, these bearing nuts—also known as shaft nuts—keep vibration from shifting bearings, bushings, pulleys, and gears on your threaded shaft or spindle. They have slotted sides, so you can tighten and loosen them with a spanner wrench or spanner socket.

Carbon Steel—Carbon steel bearing nuts are strong and resist wear.

Stepped Face—Use stepped-face bearing nuts with DIN 462 spring lock washers. You can also use them in pairs or with other bearing nuts. For the nut closer to the bearing, position the stepped face towards the bearing. All meet DIN standards for bearing lockout dimensions.

Thread Spacing—When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.

	Nuts								Bearing Lock Washers
	Thread
	Size	Spacing	OD, mm	Wd., mm	Specs. Met	For Lock Washer Specs. Met		Each		Each
Carbon Steel







				Stepped Face

				M28 × 1.5 mm	Extra Fine	50	10	DIN 1804	DIN 462	3564N19	000000	90407A123	00000


				M30 × 1.5 mm	Extra Fine	50	10	DIN 1804	DIN 462	3564N21	00000	90407A124	0000

Metric Press-Fit Drill Bushings

Also known as jig bushings, these metric drill bushings fit inside fixture plate holes to precisely guide drill bits, counterbores, reamers, and other cutting tools. They improve accuracy so that your drilled holes and cuts are consistent from part to part. Known for their versatility, drill bushings are also used as spacers, shims, and machinery bushings. These bushings are made of hardened, ground steel that holds its shape and resists wear, so they last for many cycles without needing to be replaced.

All bushings have a chamfer on the outside that centers the bushing as you place it into the hole. Press into place with a manual or hydraulic press. Since the bushing is sized slightly larger than the hole for an extremely tight fit, it’ll stay put permanently. These are ANSI Type PM bushings—also known as headless bushings—which means you don’t need to counterbore the hole to mount them flush.

They also have an internal chamfer that makes it easy to insert bits, pins, and punches without damaging the bushing or misaligning tools.

Don't see the size you need? Additional sizes are available.

DIN 179—DIN 179 bushings meet dimensional and material standards that make sure they're compatible with other parts and tools. Although DIN 179 is no longer an active standard, it's still a common reference point for designers.

						Tolerance, mm								Each
	OD, mm	Lg., mm	Internal Chamfer	For Drill Bit Size, mm	For Drill Bit Size Decimal Equiv.	ID	OD	Lg.	Drill Bushing Type	Material	Hardness	Specs. Met		1-5	6-11	12-Up
35 mm ID



		50	19	One End	35	1.378"	0.025 to 0.05	0.017 to 0.033	-0.2 to 0.2	PM	Steel	Rockwell C61	DIN 179	96990A480	000000	000000	000000


		40 mm ID



				50	19	One End	40	1.5748"	0.025 to 0.05	0.017 to 0.033	-0.2 to 0.2	PM	Steel	Rockwell C61	DIN 179	96990A510	00000	00000	00000

Oil-Embedded Thrust Bearings for Food and Beverage

Infused with food-grade oil, these bearings are safe for incidental contact with food. The oil is odorless, colorless, and tasteless, so they're common on food production and packaging lines. You can install and forget them since their porous surface releases oil over time. All are fabricated, lubricated, and inspected in the U.S.

If you need a bearing rated for direct contact with food, consider dry-running thrust bearings for food and beverage.

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	Specs. Met		Each
841 Bearing Bronze



	25	50	3	3,650 lb. @ 60 rpm	Synthetic Oil	-75 to 300	FDA Compliant 21 CFR 178.3570, NSF Registered H1	5429T229	000000


	High-Load 863 Iron Copper



			25	50	3	2,550 lb. @ 60 rpm	Synthetic Oil	-75 to 300	FDA Compliant 21 CFR 178.3570, NSF Registered H1	5371N129	00000

Shims

With thickness tolerances as fine as a strand of hair, these shims precisely align, space, and level components on shafts, arbors, and machinery.

You can stack multiple shims to achieve your exact thickness, but stacking more than four may cause them to shift. Remember, fewer shims are better, so a couple of thicker shims are more stable than a bunch of thin shims.

18-8 Stainless Steel—The choice for wet and outdoor environments, these shims resist rust. However, they’ll corrode or pit when exposed to salt water and chemicals.

Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these shims won't degrade when exposed to harsh weather, salt water, and most chemicals.

Carbon Steel—Best for dry environments since moisture will cause these shims to rust.

Stress-Resistant Spring Steel—These shims are harder and hold their shape better than carbon steel. Use them for high-stress applications, such as leveling heavy machinery. They're best for dry environments since moisture will cause them to rust.

Brass—With a warm, polished look, these shims are often chosen for their appearance. Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments.

	Thk., mm	Thk. Tolerance, mm	ID Tolerance, mm	OD Tolerance, mm	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				40 mm ID × 50 mm OD

				0.1	-0.013 to 0.013	-0.29 to 0.31	-0.04 to 0.06	Rockwell B70	—	10	98089A248	000000


				0.2	-0.023 to 0.023	-0.29 to 0.31	-0.04 to 0.06	Rockwell B70	—	10	98089A288	00000
				0.3	-0.055 to 0.055	-0.29 to 0.31	-0.04 to 0.06	Rockwell B70	—	10	98089A329	00000
				0.5	-0.064 to 0.064	-0.3 to 0.3	-0.05 to 0.05	Rockwell B70	—	10	98089A372	00000
				1	-0.105 to 0.105	-0.3 to 0.3	-0.05 to 0.05	Rockwell B70	—	5	98089A416	00000
				2	-0.2 to 0.2	0 to 0.28	-0.28 to 0.28	Rockwell B70	ASTM A240	1	98089A181	0000


				Highly Corrosion-Resistant 316 Stainless Steel







								40 mm ID × 50 mm OD

								1	-0.105 to 0.105	-0.3 to 0.3	-0.5 to 0.5	Rockwell B70	ASTM A240	5	90214A164	00000


								Carbon Steel







												40 mm ID × 50 mm OD

												0.1	-0.013 to 0.013	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	1	3088A015	0000


												0.2	-0.045 to 0.045	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	1	3088A035	0000
												0.3	-0.072 to 0.072	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	1	3088A055	0000
												0.5	-0.064 to 0.064	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	25	3088A075	0000
												1	-0.105 to 0.105	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	25	3088A095	00000
												1.5	-0.14 to 0.14	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	10	3088A115	0000
												2	-0.21 to 0.21	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	10	3088A307	0000


												Stress-Resistant Spring Steel







																40 mm ID × 50 mm OD

																0.1	-0.03 to 0	0.03 to 0.4	-0.47 to -0.04	Rockwell B85	DIN 988	10	98055A357	0000


0.2	-0.04 to 0															0.03 to 0.4	-0.47 to -0.04	Rockwell B85	DIN 988	10	98055A358	0000
0.3	-0.05 to 0															0.03 to 0.4	-0.47 to -0.04	Rockwell B85	DIN 988	10	98055A359	0000
0.5	-0.05 to 0															0.03 to 0.4	-0.47 to -0.04	Rockwell B85	DIN 988	10	98055A362	0000
1	-0.05 to 0	0.03 to 0.4														-0.47 to -0.04	Rockwell B85	DIN 988	10	98055A363	0000
2	-0.5 to 0.5	-0.3 to 0.3	-0.5 to 0.5													Rockwell C40	—	5	98055A142	00000


Brass







																40 mm ID × 50 mm OD

																0.2	-0.045 to 0.045	-0.3 to 0.3	-0.5 to 0.5	Rockwell B14	ASTM B36	1	92678A619	0000


				0.5	-0.064 to 0.064											-0.3 to 0.3	-0.5 to 0.5	Rockwell B14	ASTM B36	5	92678A639	0000
				2	-0.21 to 0.21											-0.3 to 0.3	-0.5 to 0.5	Rockwell B14	ASTM B36	1	92678A669	0000