3.002" ID Bearings | McMaster-Carr

Small but mighty, our thinnest rolling thrust bearings slot into tight spaces and spin at whirring speeds. Their long, slender rollers support thrust loads and reduce friction in everything from machine tool spindles to gearboxes.

A cage holds the rollers in place. You can install these bearings without washers between hardened, ground surfaces for the thinnest profile. If you’re working with unhardened, unground surfaces, you’ll need two washers for the rollers to run on. This three-piece 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.

	Thrust Bearings									Thin Washers			Thick Washers
	For Shaft Dia.	OD	Thk.	Cage Material	Dynamic Thrust Load Cap., lb.	Max. Rotation Speed, rpm	Temp. Range, ° F		Each	Thk.		Each	Thk.		Each
Steel



		3"	3 3/4"	5/64"	Steel	6,600	2,800	0 to 240	5909K28	000000	0.032"	5909K281	000000	0.126"	5909K282	000000

Washers for Needle-Roller Thrust Bearings

Adapt needle-roller thrust bearings to use on unhardened, unground surfaces.

For Shaft Dia.	OD	Thk.	Washer Material		Each
3"	3 3/4"	0.032"	Steel	5909K281	000000
3"	3 3/4"	0.126"	Steel	5909K282	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.

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



	3"	3 1/2"	2 1/2"	15,000 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6391K854	000000


	3"	3 1/2"	3"	18,000 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6391K695	000000
	3"	3 1/2"	4"	24,000 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6391K471	000000