55.05mm OD Bearings | McMaster-Carr

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.

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	Temp. Range, ° F		Each
841 Bearing Bronze



	45	55	35	4,850 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6658K316	000000


	45	55	45	6,250 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6658K771	00000
	45	55	55	7,650 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6658K772	00000
	45	55	60	8,350 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6658K317	00000


	High-Load 863 Iron Copper



			45	55	45	7,850 lb. @ 30 rpm	Synthetic Oil	-15 to 300	2868T409	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.

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	Lubricant Additive	Temp. Range, ° F	Specs. Met		Each
841 Bearing Bronze



	45	55	55	7,650 lb. @ 30 rpm	Synthetic Oil	PTFE	-60 to 300	ASTM B438	1688K221	000000


	High-Load 863 Iron Copper



			45	55	45	7,850 lb. @ 30 rpm	Synthetic Oil	PTFE	-60 to 300	—	7460N229	00000


			45	55	55	9,600 lb. @ 30 rpm	Synthetic Oil	PTFE	-60 to 300	—	7460N231	00000