45 mm OD Bearings | McMaster-Carr

For silky-smooth motion, the balls inside these bearings roll nearly friction-free. You'll often find them at the end of a shaft or between a stationary and rotating surface, such as on a propeller or rotary table.

These bearings come as three separate pieces—one cage and two washers. The cage holds the balls in place, while the washers create a surface for the balls to roll on. This 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.

	OD, mm	Thk., mm	Cage Material	Dynamic Thrust Load Cap., lb.	Max. Rotation Speed, rpm	Temp. Range, ° F	Includes		Each
Steel



	25	45	14	Steel	5,000	5,500	-40 to 240	Two Washers	6681K16	000000

Quick-Grip Screw-Clamp Bushings

Also known as Trantorque bushings, these tighten with a twist of the collar nut—no screws needed. As you tighten the collar nut, the inner sleeve contracts onto the shaft and the outer sleeve expands to hold your sprocket, pulley, or gear.

	OD, mm	Overall Wd., mm	Max. Torque, in·lbf		Each
Steel



	30	45	41	5,100	2298K72	0000000


	Zinc-Plated Steel



			20	45	48	2,550	2298K57	000000


			22	45	48	2,850	2298K21	000000
			25	45	48	3,200	2298K58	000000

Flanged Sleeve Bearings

These bearings don’t come with a lubricant, so you can select the oil that meets the needs of your application. You’ll need to refill the oil, so make sure the bearing is located where you can access it. All are fabricated and inspected in the U.S.

Flanged sleeve bearings combine a sleeve and thrust bearing in one. The flange supports thrust loads and prevents the bearing from being pushed out of place. The sleeve is the simplest way to support the load of a rotating shaft while reducing friction. Also known as plain bearings.

High-Load Chemical-Resistant 954 Bearing Bronze—The strongest of our bronze bearings. The addition of iron and aluminum makes them exceptionally strong and resistant to chemicals. They’re often used in the most demanding environments, such as salt mines. Also known as aluminum bronze.

	For Housing ID, mm	Lg., mm	Flange OD, mm	Flange Thk., mm	Dynamic Radial Load Cap. @ Speed	Dynamic Thrust Load Cap. @ Speed	Temp. Range, ° F		Each
High-Load Chemical-Resistant 954 Bearing Bronze



	40	45	40	50	2.5	11,150 lb. @ 30 rpm	4,900 lb. @ 30 rpm	-350 to 500	2934T167	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, mm	Wd., mm	Insert Max. Temp., ° F	Specs. Met		Each		Each		Each
Chamfered Face



		M30 × 1.5 mm	Extra Fine	45	11.5	160	ISO 2982-2	6343K38	000000	6343K68	000000	5510N153	0000000

High-Temperature Graphite-Lubricated Sleeve Bearings

Made of a graphite and metal alloy, these bearings stay slippery at high temperatures where oil burns off and other bearings fail. With no need for refills, they require little to no maintenance. You’ll find them in pumps, propellers, and mixers that spin near steam or inside ovens. However, graphite may eventually flake off, dropping flecks and leaving smudges. If you need a spic-and-span space, consider dry-running bearings made of slippery plastic instead. 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.

High-Load 932 Bearing Bronze—These bearings are strong enough for sudden starts and stops, plus they resist wear and tear. They are cast from an alloy of leaded tin bronze for uniform rigidity and strength. Also known as 660 leaded bronze bearings.

	For Housing ID, mm	Lg., mm	Dynamic Radial Load Cap. @ Speed	Temp. Range, ° F		Each
High-Load 932 Bearing Bronze



	40	45	25	5,400 lb. @ 30 rpm	-350 to 450	6405K437	000000


	40	45	45	9,750 lb. @ 30 rpm	-350 to 450	6405K442	00000

Corrosion-Resistant Flange-Mounted Linear Ball Bearings

The bearing, housing, and balls of these mounted bearings are stainless steel for excellent corrosion resistance. The flanged housing is good for vertical linear motion applications. All bearings are for use with round end-supported shafts and have a fixed-alignment design for use where shaft misalignment is unlikely. End seals keep lubricant in and dirt out.

Fixed Alignment

Image of Product. Front orientation. Contains Annotated, MultipleImages. Linear Bearings. Corrosion-Resistant Flange-Mounted Linear Ball Bearings , Fixed Alignment, Round Flange.

Round Flange

		Overall, mm			Flange, mm				Load Capacity, lb.				Mounting Holes
	For Shaft Dia., mm	Lg.	Wd.	Ht.	Thk.	OD	Bolt Circle Dia., mm	OD, mm	Dynamic	Static	Temp. Range, ° F	For Shaft Material	No. of	Dia., mm		Each
440C Stainless Steel Bearings with Round Flange



		30	64	74	74	10	74	60	45	350	610	-4 to 248	Stainless Steel, Steel	4	6.6	5931K19	0000000

Bearing Nuts

Carbon Steel

Chamfered Face

Carbon Steel

Stepped 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.

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

Stepped Face—Use stepped-face bearing nuts with DIN 462 spring lock washers. You can also use them in pairs or with other bearing nuts. For the nut closer to the bearing, position the stepped face towards the bearing. All meet DIN standards for bearing lockout dimensions.

ISO 2982— Some chamfered-face bearing nuts meet ISO 2982 (formerly DIN 981), an international standard for bearing locknut dimensions. Their sizes correspond to SKF KM series. Use them with DIN 5406 spring lock washers.

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, mm	Wd., mm	Specs. Met	For Lock Washer Specs. Met		Each		Each		Each
Carbon Steel







				Chamfered Face

				M30 × 1.5 mm	Extra Fine	45	7	DIN 981, ISO 2982	DIN 5406	3554N17	00000	90391A117	00000	5510N182	0000000




						Stepped Face

						M26 × 1.5 mm	Extra Fine	45	10	DIN 1804	DIN 462	3564N18	00000	———	0	———	0

Thrust Bearings

With no moving parts, these bearings are the plainest way to support thrust loads while reducing friction. They don't come with lubricant, so you can choose the oil that's best for your application. Make sure to mount them where they're easy to access, since you'll need to replenish the oil frequently. All are fabricated and inspected in the U.S.

High-Load Chemical-Resistant 954 Bearing Bronze—The addition of iron and aluminum makes these bearings strong and exceptionally chemical resistant. You'll find them in demanding environments, such as salt mines. Also known as aluminum bronze.

	OD, mm	Thk., mm	Dynamic Thrust Load Cap. @ Speed	Temp. Range, ° F		Each
High-Load Chemical-Resistant 954 Bearing Bronze



	20	45	3	Not Rated	-350 to 500	2872T57	000000

Rotary and Linear Ball Bearings


	Fixed Alignment With End Seals

Engineered for simultaneous linear and rotary motion, these bearings are used with round end-supported shafts. The fixed-alignment design is for use where shaft misalignment is unlikely. To install, slide bearings into a housing (not included) and secure with two retaining rings (sold individually).

With End Seals—Bearings with end seals keep lubricant in and dust out.

	Bearings												Retaining Rings
	For Shaft Dia., mm	Overall Lg., mm	For Housing ID, mm	Retaining Ring Groove End-to-End Lg., mm	Dynamic Load Cap., lb.	Dynamic Rotary Load Cap. @ Speed	Max. Rotation Speed, rpm	Max. Temp., ° F	Max. Stroke Lg., mm	For Shaft Material		Each	Pkg. Qty.		Pkg.
Fixed Alignment







				Steel Bearings with End Seals

				30	65	45.0000 to 45.0250	50.1	670	278 lb. @ 500 rpm	5,000	200	68	Stainless Steel, Steel	6485K28	000000	1	9968K58	00000

High-Temperature Linear Ball Bearings for Support Rail Shafts

The choice for low-friction motion in high-temperature environments. Mount these bearings on a support rail shaft for applications requiring maximum rigidity. They have a fixed-alignment design for applications where shaft misalignment is unlikely. To install, slide bearings into a housing (not included) and secure in place with two retaining rings (sold separately).

Fixed Alignment

Image of Product. Front orientation. Contains Annotated. Linear Bearings. High-Temperature Linear Ball Bearings for Support Rail Shafts .

	Bearings															Retaining Rings
									Load Capacity, lb.		Temp., ° F
	For Shaft Dia., mm	Overall Lg., mm	OD, mm	Wd., mm	For Housing ID	With Retaining Ring Grooves	Retaining Ring Groove End-to-End Lg., mm	With End Seals	Dynamic	Static	Min.	Max.	For Shaft Material		Each	Pkg. Qty.		Pkg.
Steel Bearings with Steel Balls



		30	64	45	15	45.000 mm to 45.025 mm	Yes	44.5	No	350	615	-4	230	Stainless Steel, Steel	63255K75	0000000	1	9968K58	00000

High-Temperature Graphite-Lubricated Thrust Bearings

Keep parts spinning in temperatures as hot as 750° F. Lubricated with graphite, these bearings stay slippery where oil would burn off or solidify. You can install and forget them since the lubricant lasts forever. All are fabricated, lubricated, and inspected in the U.S.

High-Load 932 Bearing Bronze—Cast from an alloy of leaded tin bronze for uniform rigidity and strength. Also known as 660 leaded bronze.

	OD, mm	Thk., mm	Dynamic Thrust Load Cap. @ Speed	Temp. Range, ° F		Each
High-Load 932 Bearing Bronze



	20	45	3	3,950 lb. @ 60 rpm	-350 to 450	2855T116	000000

Grooved Sleeve Bearings

A figure-8-shaped groove provides a flow path for lubricant and distributes it evenly inside the bearing’s surface. A refill hole on the outside lets you inject your lubricant straight into the groove. These bearings don’t come with a lubricant, so you can select the oil that meets the needs of your application. You’ll need to refill the oil, so make sure the bearing is located where you can access it. All are fabricated 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	Temp. Range, ° F		Each
High-Load 932 Bearing Bronze



	40	45	25	5,400 lb. @ 30 rpm	-350 to 450	7965K848	000000


	40	45	45	9,750 lb. @ 30 rpm	-350 to 450	7965K849	00000

Linear Bearings for Ball Splines

Combine these bearings with a ball spline to create a compact linear and rotary motion system for applications with fast, complex movements, such as robotics. These bearings move smoothly and precisely even at high speeds along ball splines while grooves on the ball spline transmit rotary power. Clip a retaining ring into the groove on these bearings to position them in your system. Use the keyway and included machine key for attaching your load.

Steel Bearings


	For 4 Splines

										Groove, mm			Keyway, mm
For Spline Dia., mm	For No. of Splines	Overall Lg., mm	OD, mm	Dynamic Load Cap., lb.	Static Load Cap., lb.	Max. Dynamic Torque, in·lbf	Max. Static Torque, in·lbf	Max. Temp., ° F	With Retaining Ring Grooves	Wd.	Dia.	Includes	Lg.	Wd.	Dp.		Each



	28	4	80	45	4,150	5,200	2,557	3,646	176	Yes	4.15	42.6	Machine Key	41	7	4	61145K38	0000000

High-Temperature Linear Ball Bearings

The choice for low-friction motion in high-temperature environments. Bearings are for use with round end-supported shafts and have a fixed-alignment design for applications where shaft misalignment is unlikely. To install, slide bearings into a housing (not included).

Fixed Alignment


With Retaining Ring Grooves

With Retaining Ring Grooves—For bearings with retaining ring grooves, secure with two retaining rings (sold individually).

	Bearings															Retaining Rings
								Load Capacity, lb.			Temp., ° F
	For Shaft Dia., mm	Overall Lg., mm	OD, mm	For Housing ID	With Retaining Ring Grooves	Retaining Ring Groove End-to-End Lg., mm	With End Seals	Dynamic	Static	Dynamic Load Cap. @ Temp.	Min.	Max.	For Shaft Material		Each	Pkg. Qty.		Pkg.
Steel Bearings with Steel Balls



		30	64	45	45.000 mm to 45.025 mm	Yes	44.5	No	350	615	350 lb. @ 230° F	-4	230	Stainless Steel, Steel	63255K52	000000	1	9968K58	00000

Mounted Linear Bearings for Ball Splines

A flange with mounting holes makes it easy to attach a load to these bearings. Create a compact linear and rotary motion system for robots and other applications requiring complex, fast movements, by combining them with ball splines. These bearings move smoothly and precisely even at high speeds along ball splines while grooves on the ball spline transmit rotary power. Clip a retaining ring (not included) into the groove on these bearings to position them in your system.

Steel Bearings


		For 4 Splines

												Groove, mm
For Spline Dia., mm	For No. of Splines	Overall Lg., mm	Flange OD, mm	Bolt Circle Dia., mm	OD, mm	Dynamic Load Cap., lb.	Static Load Cap., lb.	Max. Dynamic Torque, in·lbf	Max. Static Torque, in·lbf	Max. Temp., ° F	With Retaining Ring Grooves	Wd.	Dia.	No. of Mounting Holes		Each



	28	4	80	70	54	45	4,150	5,200	2,557	3,646	176	Yes	4	43.9	4	61145K48	0000000

Metric Clamping Lead Screw Collars

Thread these one-piece collars onto a metric lead screw to separate and position components, or use them as an end stop to limit travel. Made of black-oxide steel, they have mild corrosion resistance. Tighten the clamping screws to secure.

To ensure compatibility, please select a collar that has the same thread type, direction, size, pitch, and number of thread starts as your lead screw.

	No. of Thread Starts	Hardness		Each
Right-Hand Thread







	Black-Oxide 1215 Carbon Steel

	M24 × 5 mm	45	15	1	Brinell 167	2198N103	000000

Thin-Profile Bearing Nuts

Used in pairs or with another bearing nut, these thin-profile nuts—often called shaft nuts—hold bearings, bushings, pulleys, and gears in place on your threaded shaft or spindle. Threading two nuts tightly against each other makes it harder for vibration to loosen your assembly than if you used only one nut. For the nut closer to the bearing, position the stepped face towards the bearing. These thin-profile nuts have holes on the side, so you can tighten and loosen them with a pin spanner wrench. All meet DIN 1816, an international standard for bearing locknut dimensions.

Carbon Steel—Carbon steel bearing nuts are strong and resist wear.

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.

	Thread
	Size	Spacing	OD, mm	Wd., mm	Specs. Met		Each
Carbon Steel







				Stepped Face

				M26 × 1.5 mm	Extra Fine	45	10	DIN 1816	3549N19	000000

Shims

With thickness tolerances as fine as a strand of hair, these shims precisely align, space, and level components on shafts, arbors, and machinery.

You can stack multiple shims to achieve your exact thickness, but stacking more than four may cause them to shift. Remember, fewer shims are better, so a couple of thicker shims are more stable than a bunch of thin shims.

18-8 Stainless Steel—The choice for wet and outdoor environments, these shims resist rust. However, they’ll corrode or pit when exposed to salt water and chemicals.

Carbon Steel—Best for dry environments since moisture will cause these shims to rust.

Stress-Resistant Spring Steel—These shims are harder and hold their shape better than carbon steel. Use them for high-stress applications, such as leveling heavy machinery. They're best for dry environments since moisture will cause them to rust.

	OD Tolerance, mm	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	35 mm ID × 45 mm OD

	0.1	-0.013 to 0.013	-0.3 to 0.3	-0.04 to 0.06	Rockwell B70	—	10	98089A244	000000


	0.2	-0.023 to 0.023	-0.3 to 0.3	-0.04 to 0.06	Rockwell B70	—	10	98089A284	00000
	0.3	-0.055 to 0.055	-0.3 to 0.3	-0.04 to 0.06	Rockwell B70	—	10	98089A325	00000
	0.5	-0.064 to 0.064	-0.3 to 0.3	-0.05 to 0.05	Rockwell B70	—	10	98089A368	00000
	1	-0.105 to 0.105	-0.3 to 0.3	-0.05 to 0.05	Rockwell B70	—	5	98089A412	00000
	2	-0.21 to 0.21	-0.3 to 0.3	-0.13 to 0.13	Rockwell B70	ASTM A240	1	98089A183	0000


	Carbon Steel







					35 mm ID × 45 mm OD

					0.2	-0.045 to 0.045	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	5	3088A998	0000


					0.5	-0.064 to 0.064	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	25	3088A074	0000
					1	-0.105 to 0.105	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	25	3088A094	00000
					1.5	-0.14 to 0.14	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	10	3088A114	0000
					2	-0.21 to 0.21	-0.3 to 0.3	-0.5 to 0.5	Rockwell B40	—	10	3088A306	0000


					Stress-Resistant Spring Steel







									32 mm ID × 45 mm OD

									2	-0.05 to 0	0.03 to 0.4	-0.47 to -0.04	Rockwell B85	DIN 988	10	98055A576	00000




											35 mm ID × 45 mm OD

											0.1	-0.03 to 0	0.03 to 0.4	-0.47 to -0.04	Rockwell B85	DIN 988	10	98055A342	0000


											0.2	-0.04 to 0	0.03 to 0.4	-0.47 to -0.04	Rockwell B85	DIN 988	10	98055A343	0000
											0.3	-0.05 to 0	0.03 to 0.4	-0.47 to -0.04	Rockwell B85	DIN 988	10	98055A344	0000
											0.5	-0.05 to 0	0.03 to 0.4	-0.47 to -0.04	Rockwell B85	DIN 988	10	98055A345	0000
											1	-0.05 to 0	0.03 to 0.4	-0.47 to -0.04	Rockwell B85	DIN 988	10	98055A346	0000