4 1/2" OD Bearings | McMaster-Carr

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 1/4"	4 1/2"	1/8"	16,500 lb. @ 30 rpm	Synthetic Oil	-35 to 300	5906K621	000000


	3"	4 1/2"	1/8"	12,000 lb. @ 30 rpm	Synthetic Oil	-35 to 300	5906K622	00000
	3 1/4"	4 1/2"	1/8"	10,500 lb. @ 30 rpm	Synthetic Oil	-35 to 300	5906K623	00000

Clear Scratch- and UV-Resistant Acrylic Round Tubes

When compared to cast acrylic tubes, these extruded acrylic tubes offer nearly the same performance at a fraction of the cost. Use them for sight gauges and protective covers. This scratch- and UV-resistant material stands up to outdoor use better than polycarbonate and maintains clarity over time.

	Fabrication	Min. Temp., ° F	Max. Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Color	Flammability Rating		Each
Standard Tolerance







	1/8" Thick Wall

	4 1/2"	4 1/4"	6	Extruded	-40	180	9,195 to 11,030	0.04	Clear	UL 94 HB	8532K52	0000000

Ultra-Low-Friction Oil-Embedded Thrust Bearings

Our slipperiest metal thrust bearings glide on machines with frequent starts and stops, such as conveyors. Their oil contains nonstick PTFE particles that reduce wear and heat, extending the life of your equipment. 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.

	OD	Thk.	Dynamic Thrust Load Cap. @ Speed	Base Oil	Lubricant Additive	Temp. Range, ° F	Specs. Met		Each
841 Bearing Bronze



	2 1/4"	4 1/2"	1/8"	16,500 lb. @ 30 rpm	Synthetic Oil	PTFE	-60 to 300	ASTM B438	7421K134	000000


	3"	4 1/2"	1/8"	12,200 lb. @ 30 rpm	Synthetic Oil	PTFE	-60 to 300	ASTM B438	7421K137	00000

Multipurpose 932 Bearing Bronze Round Tubes

Balancing strength, corrosion resistance, and machinability, 932 is everything you want in a bearing bronze. It's most commonly made into thrust bearings and bushings. Also known as SAE 660.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

	ID	Temper Designation	Specs. Met		3" Long	6 1/2" Long	13" Long
1/4" Thick Wall



	4 1/2"	4"	M07	ASTM B505	8911K339	0000000	0000000	0000000


	1/2" Thick Wall



			4 1/2"	3 1/2"	M07	ASTM B505	8911K369	000000	000000	000000


			1" Thick Wall



					4 1/2"	2 1/2"	M07	ASTM B505	8911K399	000000	000000	000000


					1 1/4" Thick Wall



							4 1/2"	2"	M07	ASTM B505	8911K407	000000	000000	000000

Hub-Mount Screw-Clamp Bushings

Transfer torque directly from a shaft to a hub. These bushings install over your hub to mount a sprocket, pulley, or gear to a shaft at the same time. Common in industrial gearbox applications, they can also connect a hollow shaft over a solid shaft. As screw-clamp bushings, they're good for shock loads. When you tighten the included clamping screws, the outer rings compress against a sprocket, pulley, or gear in between them, causing the inner rings to tighten around the shaft.

	OD	Overall Wd.	Max. Torque, in·lbf	Fastener Tightening Torque, in·lbf		Each
Zinc-Plated Steel



	2 5/8"	4 1/2"	1 5/16"	21,100	100	7654N18	0000000

Highly Wear-Resistant Machinable Cast Nylon Round Tubes

The addition of MDS gives these tubes exceptional wear resistance along with a self-lubricating surface. They're made of cast nylon 6, making them easier to machine and better electrical insulators than other MDS-filled nylon tubes. Tubes can be used to fabricate pulleys, bushings, and bearings installed in hard-to-reach areas where adding a lubricant would be difficult. This material is comparable to Nylatron and Nycast.

Oversized Tolerance—Oversized tubes have an oversized OD and an undersized ID for finishing to the sizes listed.

	Fabrication	Min. Temp.	Max. Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Color		Each
Oversized Tolerance







	1/2" Thick Wall

	4 1/2"	3 1/2"	1	Cast	Not Rated	230	10,000	1.4	Black	4363N135	000000


	4 1/2"	3 1/2"	2	Cast	Not Rated	230	10,000	1.4	Black	4363N136	000000




			3/4" Thick Wall

			4 1/2"	3"	1	Cast	Not Rated	230	10,000	1.4	Black	4363N155	00000


			4 1/2"	3"	2	Cast	Not Rated	230	10,000	1.4	Black	4363N156	000000




					1" Thick Wall

					4 1/2"	2 1/2"	1	Cast	Not Rated	230	10,000	1.4	Black	4363N171	000000


					4 1/2"	2 1/2"	2	Cast	Not Rated	230	10,000	1.4	Black	4363N172	000000

Highly Machinable 936 Bearing Bronze Round Tubes

With almost twice as much lead, 936 bearing bronze machines more easily than 932. It's often made into bearings and bushings for oil pumps and gasoline engines. Also known as modified SAE 64.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

	ID	Temper Designation	Specs. Met		6" Long	13" Long
3/4" Thick Wall



	4 1/2"	3"	M07	ASTM B505	8918K155	0000000	0000000

High-Temperature Cast Nylon Round Tubes

A good choice for making sprockets and pulleys, these cast nylon 6 tubes withstand higher temperatures and are easier to machine than standard nylon 6/6 tubes. This material is comparable to Nylatron and Nycast.

Oversized Tolerance—Oversized tubes have an oversized OD and an undersized ID for finishing to the sizes listed.

								1 ft. Long		2 ft. Long
	OD	ID	Fabrication	Max. Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Color		Each		Each
Oversized Tolerance







				1/2" Thick Wall

				4 1/2"	3 1/2"	Cast	250	10,000 to 13,500	1 to 2.5	Blue	8413N191	000000	8413N192	0000000




						3/4" Thick Wall

						4 1/2"	3"	Cast	250	10,000 to 13,500	1 to 2.5	Blue	8413N261	000000	8413N262	000000




								1" Thick Wall

								4 1/2"	2 1/2"	Cast	250	10,000 to 13,500	1 to 2.5	Blue	8413N311	000000	8413N312	000000

Oil-Embedded 841 Bearing Bronze Round Tubes

With a porous surface that releases oil over time, this bronze lubricates itself. Turn it into parts that you can't easily access to relubricate, such as bearings, well pumps, and turbine blades. The oil may burn away if temperatures climb too high, however. For extreme heat up to 700° F, consider graphite-embedded bearing bronze instead.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

	ID	Temper Designation	Specs. Met		3" Long	6 1/2" Long
1" Thick Wall



	4 1/2"	2 1/2"	Not Rated	ASTM B438	8931K581	0000000	0000000

Corrosion-Resistant 954 Bearing Bronze Round Tubes

One of the most corrosion-resistant bearing bronze alloys, 954 withstands everything from sea water to sulfuric acid. It's often turned into bearings and valve bodies for demanding environments such as salt mines. Also known as aluminum bronze. If you need similar corrosion resistance with even greater strength, consider 955 bearing bronze instead.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

	ID	Temper Designation	Specs. Met		6 1/2" Long	13" Long
1" Thick Wall



	4 1/2"	2 1/2"	M07	ASTM B505	8916K106	0000000	0000000