50mm Spacers | McMaster-Carr

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.

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	00000000	000000	000000	000000


		40	50	50	620 lb. @ 30 rpm	Off-White	-10 to 220	00000000	00000	00000	00000

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.

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	12,400 lb. @ 30 rpm	-350 to 450	00000000	000000


	40	50	65	16,100 lb. @ 30 rpm	-350 to 450	00000000	00000
	40	50	75	18,600 lb. @ 30 rpm	-350 to 450	00000000	00000
	40	50	100	24,800 lb. @ 30 rpm	-350 to 450	00000000	00000
	45	50	40	11,150 lb. @ 30 rpm	-350 to 450	00000000	00000
	45	50	50	13,950 lb. @ 30 rpm	-350 to 450	00000000	00000
	45	50	100	27,900 lb. @ 30 rpm	-350 to 450	00000000	00000

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.

	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	00000000	000000


	40	50	65	14,100 lb. @ 30 rpm	-350 to 450	00000000	00000
	40	50	75	16,250 lb. @ 30 rpm	-350 to 450	00000000	00000
	40	50	100	21,700 lb. @ 30 rpm	-350 to 450	00000000	00000
	45	50	75	18,300 lb. @ 30 rpm	-350 to 450	00000000	00000

Dry-Running 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.

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.

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



	40	50	30	60	5	3,750 lb. @ 30 rpm	3,250 lb. @ 30 rpm	Blue	-40 to 150	0000000	000000


	Moisture-Resistant Ultra-Low-Friction Plastic Blend



			45	50	20	58	2	970 lb. @ 30 rpm	880 lb. @ 30 rpm	Yellow	-50 to 190	00000000	0000

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.

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	Specs. Met		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	000000000	000000

Flanged Sleeve 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



	40	50	30	60	5	7,400 lb. @ 30 rpm	9,700 lb. @ 30 rpm	-350 to 450	0000000	000000


	40	50	40	60	5	9,900 lb. @ 30 rpm	9,700 lb. @ 30 rpm	-350 to 450	00000000	00000

Ultra-Low-Friction Oil-Embedded Sleeve Bearings

Our slipperiest metal bearings, these are ideal for machinery with frequent starts and stops, such as conveyors. With nonstick PTFE particles added to the oil, they reduce friction to minimize wear and heat, so equipment runs more efficiently and lasts longer. 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.

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 operate at slower speeds. The increased iron content makes these bearings appear silver.

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	Lubricant Additive	Temp. Range, ° F		Each
High-Load 863 Iron Copper



	40	50	30	5,250 lb. @ 30 rpm	Synthetic Oil	PTFE	-60 to 300	00000000	000000


	40	50	40	7,000 lb. @ 30 rpm	Synthetic Oil	PTFE	-60 to 300	00000000	00000
	40	50	60	10,500 lb. @ 30 rpm	Synthetic Oil	PTFE	-60 to 300	00000000	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.

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



	40	50	25	3,100 lb. @ 30 rpm	Synthetic Oil	-35 to 300	00000000	000000


	40	50	30	3,700 lb. @ 30 rpm	Synthetic Oil	-35 to 300	00000000	00000
	40	50	35	4,300 lb. @ 30 rpm	Synthetic Oil	-35 to 300	00000000	00000
	40	50	40	4,950 lb. @ 30 rpm	Synthetic Oil	-35 to 300	00000000	00000
	40	50	50	6,200 lb. @ 30 rpm	Synthetic Oil	-35 to 300	00000000	00000
	40	50	60	7,400 lb. @ 30 rpm	Synthetic Oil	-35 to 300	00000000	00000


	High-Load 863 Iron Copper



			40	50	30	5,250 lb. @ 30 rpm	Synthetic Oil	-15 to 300	00000000	00000


			40	50	40	7,000 lb. @ 30 rpm	Synthetic Oil	-15 to 300	00000000	00000
			40	50	60	10,500 lb. @ 30 rpm	Synthetic Oil	-15 to 300	00000000	00000

Dry-Running Sleeve Bearings for Food and Beverage

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.

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



	45	50	20	870 lb. @ 30 rpm	Blue	-50 to 190	FDA Compliant 21 CFR 177.1550	00000000	00000


	45	50	40	1,750 lb. @ 30 rpm	Blue	-50 to 190	FDA Compliant 21 CFR 177.1550	00000000	0000