3 5/8" OD 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



		2 3/4"	3 5/8"	1/8"	Steel	10,700	4,600	0 to 240	00000000	000000	1/32"	00000000	00000	1/16"	00000000	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
2 3/4"	3 5/8"	1/32"	Steel	00000000	00000
2 3/4"	3 5/8"	1/16"	Steel	00000000	00000

Flange-Mount Linear Bearing Housings

For 1 Bearing

Slide up to two linear ball or sleeve bearings into these housings and secure them with the included internal retaining rings.

			Overall					Mounting Holes
	For Bearing OD	For Max. Bearing Lg.	Lg.	Wd.	Ht.	Flange Thk.	OD	No. of	Dia.		Each
6061 Aluminum







				For 1 Bearing

				2 3/8"	3"	4"	4"	4"	3/4"	3 5/8"	4	13/32"	0000000	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	Thk.	Dynamic Thrust Load Cap. @ Speed	Base Oil	Temp. Range, ° F		Each
841 Bearing Bronze



	2"	3 5/8"	3/16"	12,450 lb. @ 30 rpm	Synthetic Oil	-35 to 300	00000000	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.

Carbon Steel—All carbon steel locknuts are strong and resist wear, though they don’t stand up to corrosion as well as 303 stainless steel locknuts.

303 Stainless Steel—303 stainless steel locknuts resist corrosion better than carbon steel locknuts but aren’t as strong. They withstand washdowns and chemicals.

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.

	Locknuts										Sockets
	Thread						Carbon Steel		303 Stainless Steel
	Size	Spacing	OD	Wd.	Insert Max. Temp., ° F	Specs. Met		Each		Each		Each
Chamfered Face



		2.751"-18	Extra Fine	3 5/8"	5/8"	160	ANSI/ABMA 8.2	0000000	000000	0000000	0000000	00000000	0000000

Bearing Nuts


Carbon Steel Chamfered Face	303 Stainless Steel, Chamfered 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.

303 Stainless Steel—303 stainless steel bearing nuts resist corrosion better than carbon steel. They also withstand washdowns and chemicals.

Chamfered Face—Chamfered-face bearing nuts weigh less and produce less heat than stepped-face nuts.

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		Sockets
	Thread
	Size	Spacing	OD	Wd.	Specs. Met	For Lock Washer Specs. Met		Each		Each		Each
Carbon Steel







				Chamfered Face

				2.751"-18	Extra Fine	3 5/8"	9/16"	ANSI/ABMA 8.2	ANSI/ABMA 8.2	00000000	000000	000000000	00000	00000000	0000000


				303 Stainless Steel







								Chamfered Face

								2.751"-18	Extra Fine	3 5/8"	9/16"	ANSI/ABMA 8.2	ANSI/ABMA 8.2	0000000	000000	000000000	00000	00000000	000000