50.04mm 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-Strength 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. Also known as Oilite® 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	6658K311	000000
	40	50	30	3,700 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6658K767	00000
	40	50	35	4,300 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6658K312	00000
	40	50	40	4,950 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6658K768	00000
	40	50	50	6,200 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6658K313	00000
	40	50	60	7,400 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6658K769	00000


	High-Strength 863 Iron Copper



			40	50	30	5,250 lb. @ 30 rpm	Synthetic Oil	-15 to 300	2868T406	00000
			40	50	40	7,000 lb. @ 30 rpm	Synthetic Oil	-15 to 300	2868T407	00000
			40	50	60	10,500 lb. @ 30 rpm	Synthetic Oil	-15 to 300	2868T408	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.

	For Housing ID, mm	Lg., mm	Dynamic Radial Load Cap. @ Speed	Base Oil	Lubricant Additive	Temp. Range, ° F		Each
High-Strength 863 Iron Copper



	40	50	30	5,250 lb. @ 30 rpm	Synthetic Oil	PTFE	-60 to 300	7460N226	000000
	40	50	40	7,000 lb. @ 30 rpm	Synthetic Oil	PTFE	-60 to 300	7460N227	00000
	40	50	60	10,500 lb. @ 30 rpm	Synthetic Oil	PTFE	-60 to 300	7460N228	00000