42mm Bearings | McMaster-Carr

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Dynamic Thrust Load Capacity @ Speed

7,700 lb. @ 30 rpm

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9 Products

Dry-Running Metal-Reinforced Plastic Thrust Bearings

Combine naturally slippery PTFE with the strength of metal. These bearings don't need lubricant, so there's no oil to maintain, drip off, or attract dust. Backed with steel, they're as strong as other all-metal thrust bearings. However, they're best for dry environments since moisture will cause the steel to rust.

	OD, mm	Thk., mm	Dynamic Thrust Load Cap. @ Speed	Temp. Range, ° F		Each
Steel-Backed PTFE



	42	66	1.5	7,700 lb. @ 30 rpm	-320 to 530	1262N19	000000

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



	42	48	50	6,500 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6658K315	000000

Dry-Running Sleeve Bearings

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



		42	48	50	620 lb. @ 30 rpm	Off-White	-10 to 220	6389K949	000000	000000	000000

Quick-Disconnect (QD) Bushings


Clamp-On Shaft Mount	Machinable Shaft Mount

The screw connections on these bushings easily mate to compatible quick-disconnect sprockets and pulleys. Bushings fit quick-disconnect (QD) sprockets and pulleys of the same bushing trade number. As you tighten the included screws, the bushing grips the shaft and pulls it into the sprocket or pulley.

304 Stainless Steel—304 stainless steel bushings resist corrosion from washdowns and humidity, so they’re common in food-processing plants and other frequently-cleaned areas. You can machine the center of these bushings to fit the exact dimensions of your shaft.

			Keyway, mm
	For Max. Shaft Dia., mm	Overall Wd., mm	Wd.	Dp.	Fastener Tightening Torque, in·lbf	Material	Includes	For Shaft Dia., mm		Each
Clamp-On Shaft Mount







				Bushing Trade Number SD

				—	46	12	3.3	108	Cast Iron	Clamping Screws	42	2344K39	000000




						Bushing Trade Number SDS

						—	35	12	3.3	108	Cast Iron	Clamping Screws	42	2344K29	00000




								Bushing Trade Number SK

								—	49	12	3.3	180	Sintered Steel	Clamping Screws	42	2344K72	00000


								Machinable Shaft Mount







												Bushing Trade Number SH

												42	36	—	—	108	304 Stainless Steel	Clamping Screws	13	2344K76	000000

Taper-Lock Bushings

Mount these hubless bushings flush into your sprocket or pulley for a slim profile with no protruding screws. They are for use with taper-lock sprockets of the same bushing trade number. As you tighten the included set screws, the bushing grips the shaft and pulls it into your sprocket or pulley.

			Keyway, mm
	For Shaft Dia., mm	Overall Wd., mm	Wd.	Dp.	Taper	Fastener Tightening Torque, in·lbf	Includes		Each
Steel







				Bushing Trade Number 2012

				42	32	12	3.3	8°	280	Set Screws	57095K559	000000




						Bushing Trade Number 2517

						42	44	12	3.3	8°	430	Set Screws	57095K587	00000