52mm OD Bearings | McMaster-Carr

Smoother than smooth—the balls inside these bearings roll nearly friction-free. You’ll often find them on rapidly rotating parts, from the whirring chuck on a power drill to the spinning shaft on an electric motor.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

Corrosion-Resistant 440C Stainless Steel—Combine the strength of steel with the corrosion resistance of stainless steel. These bearings won't degrade from water or mild chemicals, such as the ammonia in cleaning solutions. However, they'll weaken when exposed to salt water and harsh chemicals, such as bleach.

Highly Corrosion-Resistant 316 Stainless Steel—The most corrosion-resistant metal bearings we offer. They won't pit or weaken from salt water or harsh chemicals, such as bleach and chlorine found in cleaning solutions.

ABEC Rating—Bearings with an ABEC rating meet industry tolerance standards established by the Annular Bearing Engineers Committee (ABEC). They're rated on a scale from 1 to 9. The higher the rating, the tighter the tolerance. Bearings rated ABEC 1 or 3 are precise enough for most applications. If your application consistently runs at high speeds or requires high accuracy, consider bearings rated ABEC 5 or higher, since they generate less friction and heat.

							Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Inner Ring Type	Bearing Trade No.		Each
Open







				Steel

				20	52	15	1	3,550	19,800	-20	230	Standard	6304	00000000	000000


				25	52	15	1	3,100	17,000	-20	230	Standard	6205	00000000	00000
				40	52	7	1	1,100	14,000	-50	130	Standard	6808	00000000	00000




						Corrosion-Resistant 440C Stainless Steel

						25	52	15	1	2,100	13,000	-40	240	Standard	6205	00000000	00000




								Highly Corrosion-Resistant 316 Stainless Steel

								20	52	15	Not Rated	270	720	-40	140	Standard	6304	00000000	00000


								Shielded







												Steel

												20	52	15	1	3,550	14,000	-20	230	Standard	6304-2Z	00000000	00000


												20	52	15	3	3,750	15,000	-20	230	Standard	6304-2Z	0000000	00000
												25	52	15	1	3,100	14,000	-20	230	Standard	6205-2Z	00000000	00000
												25	52	15	3	3,300	14,000	-20	230	Standard	6205-2Z	0000000	00000
												40	52	7	1	1,100	12,000	-40	150	Standard	6808-2Z	00000000	00000




														Corrosion-Resistant 440C Stainless Steel

														20	52	15	1	3,000	15,000	-40	240	Standard	6304-2Z	00000000	000000


														25	52	15	1	2,100	13,000	-40	240	Standard	6205-2Z	0000000	00000


														Sealed







																Steel

		20														52	15	1	4,150	14,000	-20	230	Standard	6304-2RS	00000000	00000


		20	52													15	3	3,750	9,500	-30	210	Standard	6304-2RS	00000000	00000
		25	52													15	1	3,100	8,000	-20	230	Standard	6205-2RS	0000000	00000
		25	52													15	3	3,300	8,500	-30	210	Standard	6205-2RS	00000000	00000




																Corrosion-Resistant 440C Stainless Steel

				25	52											15	1	2,650	13,000	-40	240	Standard	6205-2RS	0000000	00000

Permanently Lubricated Ball Bearings

Install and forget these self-lubricating bearings. Their lubricant is a solid material that fills the space between the balls and releases oil over time, so you'll never need to add more.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

							Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Inner Ring Type	Bearing Trade No.		Each
Open







				Steel

				20	52	15	1	2,750	8,300	10	200	Standard	6304	00000000	000000


				25	52	15	1	2,650	7,700	10	200	Standard	6205	00000000	00000




						Corrosion-Resistant 440C Stainless Steel

						20	52	15	1	2,750	8,000	-10	200	Standard	6304	00000000	000000


						25	52	15	1	2,400	8,000	-10	200	Standard	6205	00000000	00000
						40	52	7	1	1,100	6,000	-10	200	Standard	6808	00000000	00000


						Sealed







										Steel

										20	52	15	1	2,750	8,300	10	200	Standard	6304-2RS	00000000	00000


										25	52	15	1	2,650	7,700	10	200	Standard	6205-2RS	00000000	00000




												Corrosion-Resistant 440C Stainless Steel

												20	52	15	1	2,750	8,000	-10	200	Standard	6304-2RS	00000000	000000


												25	52	15	1	2,400	8,000	-10	200	Standard	6205-2RS	00000000	00000
												40	52	7	1	1,100	6,000	-10	200	Standard	6808-2RS	00000000	000000

Angular Contact Ball Bearings


Single Row Open	Single Row Sealed	Double Row Open	Double Row Shielded	Double Row Sealed

Support radial and thrust loads at the same time. These bearings are often found inside equipment such as gearboxes and pumps. For example, a bearing inside a gearbox withstands a radial load when the gear is engaged and a momentary thrust load when you shift to a new one. While they don't handle as much force from radial loads as standard bearings, you can pair them with a cylindrical roller bearing to increase their load capacity.

Single Row—Single-row bearings withstand thrust loads from one direction.

Double Row—Double-row bearings handle thrust loads from both directions.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

										Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Material	Dynamic Combined Load Cap., lbf	Max. Rotation Speed, rpm	Lubrication	Contact Angle	Min.	Max.	Bearing Trade No.		Each
Single Row







				Open

				20	52	15	3	Steel	3,900	16,000	Required	40°	-40	300	7304	0000000	0000000


				25	52	15	3	Steel	3,300	15,000	Required	40°	-40	300	7205	0000000	00000




						Sealed

						20	52	15	1	Steel	4,550	8,500	Lubricated	40°	-20	230	7304-2RS	0000000	000000


						25	52	15	1	Steel	3,400	8,000	Lubricated	40°	-20	230	7205-2RS	0000000	000000


						Double Row







										Open

										20	52	22.2	3	Steel	5,300	13,000	Required	30°	-40	250	3304	00000000	000000


										25	52	20.6	3	Steel	4,850	12,000	Required	30°	-40	250	3205	00000000	00000




												Shielded

												20	52	22.2	3	Steel	5,300	13,000	Lubricated	30°	-40	300	3304-2Z	00000000	000000


												25	52	20.6	3	Steel	4,850	12,000	Lubricated	30°	-40	300	3205-2Z	00000000	000000




														Sealed

														20	52	22.2	3	Steel	5,300	9,000	Lubricated	30°	-40	210	3304-2RS	00000000	000000


														25	52	20.6	3	Steel	4,850	8,500	Lubricated	30°	-40	210	3205-2RS	00000000	000000

Self-Aligning Ball Bearings

Open

Sealed

Misalignments correct themselves on the fly in these bearings. Two rows of balls have separate raceways in the inner ring and a shared raceway in the outer ring, so the balls rock back and forth to compensate for misalignment. This construction also reduces noise and vibration.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

								Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Misalignment Capability	Min.	Max.	Inner Ring Type	Bearing Trade No.		Each
Open







				Steel

				20	52	15	1	2,800	12,000	4°	Not Rated	210	Standard	1304	00000000	000000


				20	52	21	1	4,050	19,000	3°	-30	210	Standard	2304	0000000	000000
				25	52	15	1	3,200	18,000	2.5°	-30	210	Standard	1205	0000000	00000
				25	52	18	1	3,750	18,000	2.5°	-30	210	Standard	2205	0000000	000000


				Sealed







								Steel

								20	52	21	1	3,200	9,000	1.5°	-30	210	Standard	2304-2RS	0000000	000000


								25	52	18	1	3,200	9,000	1.5°	-30	210	Standard	2205-2RS	0000000	000000

Tapered-Roller Bearings

Found anywhere from machine tool spindles to conveyor rollers, these bearings have a two-piece design that allows for adjustment.

					Radial Load Cap., lb.		Thrust Load Cap., lb.
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Bearing Trade No.	Dynamic	Static	Dynamic	Static	Max. Rotation Speed, rpm	Lubrication	Temp. Range, ° F		Each
For Combined Radial and Thrust Load—Open with Steel Ring



		20	52	13	30304	2,050	7,750	1,050	6,750	4,500	Required	-60 to 200	0000000	000000


		20	52	13	30304	10,000	10,400	5,100	Not Rated	7,500	Required	-50 to 300	0000000	00000
		25	52	13	30205	1,800	8,600	1,150	9,400	4,100	Required	-60 to 200	0000000	00000
		25	52	13	30205	6,600	5,050	4,050	Not Rated	7,500	Required	-50 to 300	0000000	00000

Cylindrical Roller Bearings

With cylindrical rollers to distribute load over a large surface area, these bearings are often used to support heavy loads at high speeds in applications such as power generation and metal recycling. A cage prevents the rollers from touching each other, reducing friction for high-speed use. All of these bearings have an inner ring that's flanged on one side, so they only allow heat expansion in one direction. The bearings can be taken apart, so you can install them with precision and quickly dismantle them for maintenance or replacement.

				Radial Load Cap., lb.		Thrust Load Cap.
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Dynamic	Static	Dynamic	Static	Max. Rotation Speed, rpm	Lubrication	For Shaft Surface Smoothness, Ra, μm	Temp. Range, ° F	Specs. Met		Each
For Combined Radial and Thrust Load—Open with Steel Ring



		25	52	15	7,750	6,150	Not Rated	Not Rated	17,200	Required	0.8	-20 to 245	DIN 5412-1	00000000	000000

Spherical-Roller Bearings

Two rows of rollers give these bearings dynamic radial load capacities over five times higher than comparably sized tapered-roller bearings. Also known as rock crusher bearings, they handle heavy shock loads and are used for metal milling machinery, mining and oil field equipment, and in paper mills.

						Combined Load Cap., lbf
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Bearing Trade No.	Ring Material	Dynamic	Static	Max. Rotation Speed, rpm	Lubrication	Max. Temp., ° F		Each
Open Bearing



		25	52	18	22205	Steel	8,400	8,300	7,100	Required	390	000000	0000000

One-Way-Locking Ball Bearings

Shielded

Sealed

Prevent shafts from reversing direction. These bearings have internal components (sprags) that lock against the outer ring to transmit torque one way but spin freely in the other. They're often found in backstopping, indexing, and overrunning applications. For example, they're used to prevent conveyors from reversing.

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

								Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Max. Torque, ft·lbf	Min.	Max.	Inner Ring Type	Bearing Trade No.		Each
Shielded







				Steel

				25	52	15	1	1,620	5,600	70	-40	170	Standard	FZ 6205	0000000	0000000


				Sealed







								Steel

								25	52	20	1	1,620	5,200	70	-40	170	Standard	FZ 6205 2RS	0000000	000000

High-Load Dry-Running Ball Bearings

Double the balls for double the load capacity—these bearings carry twice as much weight as standard dry-running ball bearings. Made of naturally slippery plastic, there's no lubricant to maintain. No lubricant means no oil that could drip off, wash out, or collect dust, so they're ideal for spic-and-span spaces. They stand up to thorough cleanings since they won't rust or warp from moisture.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, reducing wear and extending the life of the bearing.

Acetal—The most common choice for plastic bearings, acetal is economical yet still stands up to daily wear and tear.

316 Stainless Steel Balls—Won't corrode from salt water or harsh chemicals, such as bleach and chlorine found in cleaning solutions.

						Temp. Range, ° F				316 Stainless Steel Balls
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	ABEC Rating	Bearing Trade No.		Each
Open







				Acetal

				25	52	21	125	500	-40	180	Not Rated	A5205-6	00000000	000000

Ball Bearings with Retaining Ring

Shielded

Sealed

No need for complicated tools—install these bearings by hand inside a housing. The ring stops the bearing from being jostled out of place when it experiences sudden forces parallel to the shaft (thrust loads).

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

				Retaining Ring, mm					Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	OD	Thk.	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Inner Ring Type	Bearing Trade No.		Each
Shielded







				Steel

				20	52	15	57.9	1.12	1	3,750	15,000	-20	230	Standard	6304-2Z	0000000	000000


				25	52	15	57.8	1.12	1	3,300	14,000	-20	230	Standard	6205-2Z	0000000	00000


				Sealed







								Steel

								20	52	15	57.9	1.12	1	3,750	9,500	-40	210	Standard	6304-2RS	0000000	00000


								25	52	15	57.9	1.12	1	3,300	8,500	-40	210	Standard	6205-2RS	0000000	00000

Electrically Insulating Ball Bearings

Shielded

Sealed

Protect bearings from stray currents. The ceramic balls insulate bearings from electrical charges in electric motors and power generators that can damage the inner ring over time. The balls also generate less heat than metal ones, so you don’t have to lubricate them as often to keep bearings running smoothly.

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

							Temp. Range, ° F			Ceramic Balls
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Bearing Trade No.		Each
Shielded







				Steel

				25	52	15	1	3,100	19,500	-20	250	6205-2Z	0000000	0000000


				Sealed







								Steel

								25	52	15	1	3,300	15,000	-40	210	6205-2RS	0000000	000000

Quick-Mount Ball Bearings

Set-Screw

Shaft Mount

Clamp-On Shaft

Mount

Slip onto a shaft and secure with the turn of a screw. You don't need any special tools to mount these bearings.

Set-Screw Shaft Mount—Tighten the screws against the shaft to hold the bearing in place. For high-speed applications, consider clamp-on shaft mounts, which are less likely to slip.

Clamp-On Shaft Mount—The clamp tightens around the shaft for a strong 360° grip. These mounts attach more securely than set screws to reduce vibration. Plus, there aren't any screws pressing into the shaft, so it stays free from damage. Also known as a concentric lock.

Black-Oxide Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

				Retaining Ring, mm						Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	OD	Thk.	Bearing Seal Type	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Bearing Trade No.		Each
Set-Screw Shaft Mount







				Black-Oxide Steel

				25	52	19.1	57.5	1.2	Sealed	1	2,800	6,350	-20	220	ER205	0000000	0000000


				Clamp-On Shaft Mount







								Black-Oxide Steel

								25	52	19	58	1.2	Shielded	1	2,800	6,350	-20	220	ER205	0000000	000000

High-Load Face-Mount Crossed-Roller Bearings

With thicker inner and outer raceways, these bearings can handle heavier loads than thin-profile crossed roller bearings. Mounting holes on the inner and outer rings allow for fastening onto hollow joints and shafts. The rollers face in alternating directions to allow for rigid, accurate motion under any combination of radial, thrust, and moment (twisting) loads. Use in applications where highly accurate motion is necessary, such as machine tools and industrial robots.

Open Bearing—Open bearings dissipate heat more efficiently than sealed bearings.

Sealed Bearing—Sealed bearings block out dust and other contaminants better than open bearings, but retain more heat.

				Combined Load Cap., lbf
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Dynamic	Static	Max. Rotation Speed, rpm	Lubrication	Temp. Range, ° F	Features		Each
For Combined Radial, Thrust, and Moment Load—Open with Steel Ring



		10	52	8	650	540	2,400	Required	0 to 230	Lubrication Groove, Two Lubrication Holes	0000000	0000000


		For Combined Radial, Thrust, and Moment Load—Sealed with Steel Ring



				10	52	8	650	540	1,900	Lubricated	0 to 210	Lubrication Groove, Two Lubrication Holes	0000000	000000

Tapered-Bore Ball Bearings

Mount these bearings on tapered shafts. Or, pair with an adapter sleeve to install them on round shafts without needing to press fit. The two rows of balls have separate raceways in the inner ring and a shared raceway in the outer ring, so the balls rock back and forth to compensate for misalignment. This construction also reduces noise and vibration.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

	Bearings														Adapter Sleeves
									Temp. Range
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Misalignment Capability	Rate of Taper	Min.	Max., ° F	Inner Ring Type	Bearing Trade No.		Each	For Shaft Dia., mm		Each
Open







				Steel

				20	52	15	1	2,800	12,000	4°	1:12	Not Rated	240	Standard	1304K	0000000	000000	—	———	0


				25	52	15	1	2,700	12,000	4°	1:12	Not Rated	240	Standard	1205K	0000000	00000	—	———	0
				25	52	18	1	2,750	12,000	4°	1:12	Not Rated	240	Standard	2205K	0000000	00000	20	0000000	000000

Thrust Ball Bearings

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	52	18	Steel	7,900	4,600	-40 to 250	Two Washers	00000000	000000


	30	52	16	Nylon	6,500	4,900	-40 to 250	Two Washers	00000000	00000
	35	52	12	Nylon	4,500	5,600	-40 to 250	Two Washers	00000000	00000

Ball Bearings for Food and Beverage

Sealed

Food production rolls along smoothly on these bearings. Greased with FDA-compliant lubricant, they’re safe to install on food-processing equipment, such as conveyor belts, so long as they don’t directly touch the food. The lubricant is a solid material that fills the space between the balls and releases oil over time, so you'll never need to add more.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

							Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Inner Ring Type	Food Industry Std.	Bearing Trade No.		Each
Sealed







				Corrosion-Resistant 440C Stainless Steel

				20	52	15	1	3,000	8,000	-40	200	Standard	FDA Compliant 21 CFR 178.3570	6304-2RS	00000000	000000


				25	52	15	1	2,650	8,000	-40	200	Standard	FDA Compliant 21 CFR 178.3570	6205-2RS	00000000	00000

High-Temperature Graphite-Lubricated Ball Bearings

Keep parts spinning in industrial ovens and other places as hot as 660° F. Greased with graphite lubricant, these bearings stay slippery where oil would burn off or solidify. You can install and forget them since the lubricant lasts forever.

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

							Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Inner Ring Type	Bearing Trade No.		Each
Shielded







				Steel

				25	52	15	1	3,300	200	-70	660	Standard	6205-2Z	0000000	0000000

Needle-Roller Bearings

Also known as drawn-cup roller bearings, these are our thinnest roller bearings. The outer ring is drawn out to form a lip that holds the bearing together. Bearings take on the shape of their housing and may be oblong prior to installation.

Open Bearing—Open bearings dissipate heat more efficiently than sealed bearings.

				Radial Load Cap., lb.
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Dynamic	Static	Max. Rotation Speed, rpm	Lubrication	For Shaft Surface Smoothness, Ra, μin	Temp. Range, ° F	Specs. Met		Each
For Radial Load—Open with Steel Ring



		45	52	12	3,300	6,150	5,900	Required	8	-20 to 280	DIN 618, ISO 3245	0000000	000000


		45	52	16	4,750	9,650	5,900	Required	8	-20 to 280	DIN 618, ISO 3245	00000000	00000
		45	52	20	6,050	13,250	5,900	Required	8	-20 to 280	DIN 618, ISO 3245	00000000	00000

High-Precision Angular Contact Ball Bearings

Open

Our most precise bearings for tackling radial and thrust loads at once, with tolerances tighter than a speck of dust. Rated ABEC 7 out of 9, they meet strict tolerance standards established by the Annular Bearing Engineers Committee (ABEC). Choose them for equipment that requires both high speed and pinpoint accuracy, such as machine tool spindles. For example, a bearing on a spindle withstands a radial load as it spins at high speeds and a thrust load when the cutting tool touches the workpiece. These bearings don’t handle as much force from radial loads as standard ones, but you can pair them with a cylindrical roller bearing to increase their load capacity.

Single Row—Single-row bearings withstand thrust loads from one direction.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

										Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Material	Dynamic Combined Load Cap., lbf	Max. Rotation Speed, rpm	Lubrication	Contact Angle	Min.	Max.	Bearing Trade No.		Each
Single Row







				Open

				25	52	15	7	Steel	3,900	29,900	Required	15°	-40	245	7205	0000000	0000000

Combination Ball/Needle-Roller Bearings

A built-in thrust ball bearing reduces wear from adjacent shaft components, while the needle rollers support high radial loads. Install anywhere you would use separate bearings for radial and thrust loads.

						Radial Load Cap., lb.		Thrust Load Cap., lb.
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Ball Bearing OD, mm	Ball Bearing Wd., mm	Dynamic	Static	Dynamic	Static	Max. Rotation Speed, rpm	Lubrication	For Shaft Surface Smoothness, Ra, μin	Temp. Range, ° F	Features		Each
For Combined Radial and Thrust Load—Open with Steel Ring



		40	52	32	61	13	5,350	10,600	6,045	11,240	4,500	Required	8	-20 to 230	Lubrication Groove, Lubrication Hole	00000000	0000000

Needle-Roller Thrust Bearings


Bearings	Washers

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



		35	52	2	Steel	4,000	6,500	0 to 240	DIN 5405-2	0000000	00000	1	0000000	00000	3.5	0000000	000000

High-Load Cylindrical-Roller Thrust Bearings

Thick, pop-can-shaped rollers balance strength and speed. These bearings reduce friction and support heavier loads than ball or needle-roller thrust bearings.

They come as three separate pieces—one cage and two washers. The cage holds the rollers in place, while the washers create a surface for the rollers to run 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



	35	52	12	Nylon	8,750	6,600	-25 to 245	Two Washers	0000000	0000000

Dry-Running Ball Bearings

Made of naturally slippery plastic so there's no lubricant to maintain or make a mess. These bearings are ideal for spic-and-span spaces since oil won't drip off, wash out, or collect dust over time. They won't rust or warp from moisture, so they stand up to thorough cleanings.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, reducing wear and extending the life of the bearing.

Acetal—The most common choice for plastic bearings, acetal is economical yet still stands up to daily wear and tear.

316 Stainless Steel Balls—Won't corrode from salt water or harsh chemicals, such as bleach and chlorine found in cleaning solutions.

Glass Balls—Nonmagnetic, so they won't interfere with sensors and other sensitive electronics.

						Temp. Range, ° F				316 Stainless Steel Balls		Glass Balls
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	ABEC Rating	Bearing Trade No.		Each		Each
Open







				Acetal

				20	52	15	90	700	-40	180	Not Rated	6304	———	0	00000000	000000


				25	52	15	90	700	-40	180	Not Rated	6205	00000000	000000	———	0

Washers for Needle-Roller Thrust Bearings

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

For Shaft Dia., mm	OD, mm	Thk., mm	Washer Material	Specs. Met		Each
35	52	1	Steel	DIN 5405-3, ISO 303	0000000	00000
35	52	3.5	Steel	—	0000000	00000

Quick-Mount Ball Bearings for Food and Beverage

Clamp-On Shaft

Mount

You don't need any special tools to install these bearings in food production areas. Slip them onto a shaft and secure with the turn of a screw for easy mounting. Greased with NSF-registered H1 lubricant, these bearings are safe to install on food-processing equipment, such as conveyor belts, so long as they don’t directly touch the food. They're IP69K rated, so they'll stand up to the hot water from a pressure washer when cleaning your facility at the end of the day.

Corrosion-Resistant Nickel-Plated Steel—These bearings resist mild chemicals, such as the ammonia in cleaning solutions, while maintaining the strength of steel. The nickel coating can wear or chip over time, though. If it does, the steel beneath will rust quickly.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

				Retaining Ring, mm						Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	OD	Thk.	Bearing Seal Type	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Enclosure Rating	Food Industry Std.		Each
Clamp-On Shaft Mount







				Corrosion-Resistant Nickel-Plated Steel

				25	52	19.1	57.5	1.2	Sealed	1	2,800	2,700	-20	220	IP69K	NSF Registered H1	0000000	0000000

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



		M35 × 1.5 mm	Extra Fine	52	12	160	ISO 2982-2	0000000	000000	0000000	000000	00000000	0000000

Linear Ball Bearings

Bearings are for use with round end-supported shafts. To install, slide bearings into a housing (not included).

Fixed Alignment


With Retaining Ring Grooves

Fixed-alignment bearings are for use where shaft misalignment is unlikely.

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

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

	Linear 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	Min.	Max.	For Shaft Material		Each	Pkg. Qty.		Pkg.
Steel Bearings with Steel Balls



		35	70	52	52.000 mm to 52.030 mm	Yes	49.5	Yes	375	705	-4	176	Stainless Steel, Steel	00000000	0000000	1	0000000	00000

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

				M35 × 1.5 mm	Extra Fine	52	8	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	00000	00000000	0000000




						Stepped Face

						M32 × 1.5 mm	Extra Fine	52	11	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0