Concentric Bearings | McMaster-Carr

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Shaft Diameter

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Four-Bolt Flange Mount

Tapped Base Mount

Two-Bolt Flange Mount

Bearing Seal Type

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Environment

High-Pressure Washdown

Width

Overall Length

Dynamic Radial Load Capacity

Less than 3,000 lb.

3,000 lb. to 4,999 lb.

5,000 lb. to 5,999 lb.

6,000 lb. to 7,999 lb.

Overall Width

Bearing Trade Number

Mounting Hole Center-to-Center

REACH

RoHS

Export Control Classification Number (ECCN)

1C999

EAR99

DFARS Specialty Metals

For Housing ID

Maximum Temperature

Grease Fitting Included

Material

Rotation Speed

2,000 rpm to 2,999 rpm

3,000 rpm to 3,999 rpm

4,000 rpm to 4,999 rpm

Length

46 Products

Quick-Mount Ball Bearings

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.

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.

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.

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







				Black-Oxide Steel

				3/4"	1 27/32"	5/8"	2.063"	0.047"	Sealed	1	2,600	10,200	-20	220	ER12	0000000	000000


				1"	2 1/16"	3/4"	2.266"	0.047"	Sealed	1	2,800	9,000	-20	220	ER16	0000000	00000
				1 1/4"	2 7/16"	7/8"	2.656"	0.063"	Sealed	1	4,350	7,600	-20	220	ER20	0000000	000000
				1 1/4"	2 27/32"	15/16"	3.078"	0.063"	Sealed	1	5,750	6,500	-20	220	ER20	0000000	000000
				1 7/16"	2 27/32"	15/16"	3.078"	0.063"	Sealed	1	5,750	6,500	-20	220	ER23	0000000	000000
				1 1/2"	3 5/32"	1 3/32"	3.406"	0.063"	Sealed	1	7,300	5,850	-20	220	ER24	0000000	000000
				2"	3 15/16"	1 3/16"	4.188"	0.094"	Sealed	1	9,750	4,500	-20	220	ER32	0000000	000000
				20 mm	47 mm	16 mm	52 mm	1.2 mm	Shielded	1	2,600	6,450	-20	220	ER204	0000000	00000
				25 mm	52 mm	19 mm	58 mm	1.2 mm	Shielded	1	2,800	6,350	-20	220	ER205	0000000	000000
				30 mm	62 mm	22 mm	68 mm	1.6 mm	Shielded	1	4,350	5,450	-20	220	ER206	0000000	000000
				40 mm	80 mm	28 mm	88 mm	1.6 mm	Shielded	1	7,300	4,150	-20	220	ER208	0000000	000000


				45 mm	85 mm	28 mm	91 mm	1.6 mm	Shielded	1	7,900	3,800	-20	220	ER209	0000000	000000

Food-and-Beverage Permanently Lubricated Mounted Ball Bearings with Four-Bolt Flange

Image of Product. Front orientation. Contains Annotated. Mounted Bearings. Food-and-Beverage Permanently Lubricated Mounted Ball Bearings with Four-Bolt Flange.

Reduce upkeep on your food line with bearings that never need lubrication. On startup, an oil-infused solid polymer releases the optimal amount of food-safe, NSF-registered lubricant—never too much or too little. The embedded oil never leaks out, and seals keep dust and contaminants from sneaking in. Install them into conveyors, packaging systems, and other food processing applications where contact with ingredients is rare but possible. The balls roll nearly friction-free within a sturdy housing to support shafts as they turn. The four-bolt flange creates a stronger connection to the mounting surface than two-bolt alternatives.

316 Stainless Steel Housing—The most corrosion-resistant metal we offer, these housings hold up to harsh chemicals and salt water.

Clamp On—Tighten the clamping screw to close the collar around your shaft for a secure, mar-free grip. The collar centers the shaft, decreasing vibration and allowing for higher speeds than set screws. Also known as concentric lock bearings.

Sealmaster—Famous for exceptional sealing, Sealmaster bearings include a signature three-part seal in the inner ring. This design blocks out gritty debris and purges old grease to extend the life of the bearing.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

		Overall
	For Shaft Dia.	Lg.	Wd.	Flange Thk.	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Bearing Material	Bearing Seal Type	Misalignment Capability	Enclosure Rating	Manufacturer		Each
316 Stainless Steel Housing







				Clamp On

				1"	3 3/4"	2 7/16"	17/32"	2,800	2,700	Steel	Sealed	2°	IP69K	Sealmaster	0000000	0000000


				1 1/4"	4 5/8"	2 3/4"	9/16"	5,780	2,000	Steel	Sealed	2°	IP69K	Sealmaster	0000000	000000
				1 7/16"	4 5/8"	2 1/4"	9/16"	5,780	2,000	Steel	Sealed	2°	IP69K	Sealmaster	0000000	000000
				1 1/2"	5 1/8"	3 1/64"	9/16"	7,340	1,750	Steel	Sealed	2°	IP69K	Sealmaster	0000000	000000
				2"	6 3/8"	3 13/32"	13/16"	9,750	1,350	Steel	Sealed	2°	IP69K	Sealmaster	0000000	000000
				2 7/16"	6 7/8"	3 51/64"	13/16"	11,780	1,250	Steel	Sealed	2°	IP69K	Sealmaster	0000000	000000

Food-and-Beverage Permanently Lubricated Tapped-Base Mounted Ball Bearings

Image of Product. Front orientation. Contains Annotated. Mounted Bearings. Food-and-Beverage Permanently Lubricated Tapped-Base Mounted Ball Bearings.

Reduce upkeep on your food line with bearings that never need lubrication. On startup, an oil-infused solid polymer releases the optimal amount of food-safe, NSF-registered lubricant—never too much or too little. The embedded oil never leaks out, and seals keep dust and contaminants from sneaking in. Install them into conveyors, packaging systems, and other food processing applications where contact with ingredients is rare but possible. The balls roll nearly friction-free within a sturdy housing to support shafts as they turn. These bearings mount from the bottom through threaded holes. With a narrow profile, they're a good fit for cramped spots where multiple shafts are mounted close together.

Plastic-Coated Cast Iron Housing—Combines the structural strength of cast iron with the natural rust resistance of plastic.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

			Overall
	For Shaft Dia.	Ctr. Ht.	Lg.	Wd.	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Bearing Material	Bearing Seal Type	Misalignment Capability	Enclosure Rating	Manufacturer		Each
Plastic-Coated Cast Iron Housing







				Clamp On

				1"	1 7/16"	3"	1 1/2"	2,800	2,700	Steel	Sealed	2°	IP69K	Sealmaster	00000000	0000000

Tapped-Base Mounted Ball Bearings

Smoother than smooth—the balls roll nearly friction-free within a sturdy housing to support shafts as they turn. These bearings mount from the bottom through threaded holes. With a narrow profile, they're a good fit for cramped spots where multiple shafts are mounted close together.

Lubricate regularly to keep your bearing in tip-top shape. These bearings come packed with grease and sealed to block out dust and contaminants.

Powder-Coated Cast Iron Housing—A rugged iron base coated in thick powder that protects against water, mild detergents, and oil. However, if the coating is scratched or chipped, the underlying iron may rust.

Set Screw—Turn the screw to lock your shaft in place. A simple, reliable choice, set screws grip tightly, but they can mar shaft surfaces.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

	Mounted Bearings												Replacement Bearings
			Overall
	For Shaft Dia.	Ctr. Ht.	Lg.	Wd.	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Bearing Material	Bearing Seal Type	Misalignment Capability	Manufacturer		Each		Each
Powder-Coated Cast Iron Housing







				Set Screw

				25 mm	36.5 mm	76.2 mm	38.1 mm	2,800	6,350	Steel	Sealed	2°	Sealmaster	00000000	0000000	00000000	0000000




						Clamp On

						1 7/16"	1 7/8"	4 1/4"	1 7/8"	5,780	6,500	Steel	Sealed	2°	Sealmaster	00000000	000000	———	0


						1 15/16"	2 1/4"	5 1/2"	2"	7,880	5,000	Steel	Sealed	2°	Sealmaster	00000000	000000	———	0
						2"	2 1/4"	5 1/2"	2"	7,880	5,000	Steel	Sealed	2°	Sealmaster	00000000	000000	———	0
						30 mm	42.9 mm	101.6 mm	38.1 mm	4,380	5,450	Steel	Sealed	2°	Sealmaster	00000000	000000	———	0

Food-and-Beverage Permanently Lubricated Mounted Ball Bearings with Two-Bolt Flange

Reduce upkeep on your food line with bearings that never need lubrication. On startup, an oil-infused solid polymer releases the optimal amount of food-safe, NSF-registered lubricant—never too much or too little. The embedded oil never leaks out, and seals keep dust and contaminants from sneaking in. Install them into conveyors, packaging systems, and other food processing applications where contact with ingredients is rare but possible. The balls roll nearly friction-free within a sturdy housing to support shafts as they turn. The housing mounts in place with a two-bolt flange, the most common type of flanged bearing.

316 Stainless Steel Housing—The most corrosion-resistant metal we offer, these housings hold up to harsh chemicals and salt water.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

Closed Caps—Mount on the end of the shaft to block out debris and prevent accidental contact with rotating parts.

Open Caps—Install anywhere along the shaft to block out debris and prevent accidental contact with rotating parts.

	Mounted Bearings													Closed Caps		Open Caps
		Overall
	For Shaft Dia.	Lg.	Wd.	Flange Thk.	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Bearing Material	Bearing Seal Type	Misalignment Capability	Enclosure Rating	Manufacturer		Each		Each		Each
316 Stainless Steel Housing







				Clamp On

				3/4"	4 13/32"	2 17/64"	7/16"	2,600	3,000	Steel	Sealed	2°	IP69K	Sealmaster	00000000	0000000	0000000	000000	0000000	000000


				1"	4 7/8"	2 7/16"	17/32"	2,800	2,000	Steel	Sealed	2°	IP69K	Sealmaster	00000000	000000	0000000	00000	0000000	00000
				25 mm	124 mm	61.9 mm	13.5 mm	2,800	2,000	Steel	Sealed	2°	IP69K	Sealmaster	00000000	000000	0000000	00000	0000000	00000
				50 mm	189 mm	78 mm	14 mm	7,850	1,500	Steel	Sealed	2°	IP69K	Sealmaster	00000000	000000	0000000	00000	0000000	00000

Mounted Ball Bearings with Four-Bolt Flange

Smoother than smooth—the balls inside these bearings roll nearly friction-free. The four-bolt flange supports shafts with a stronger connection to the mounting surface than two-bolt alternatives.

Lubricate regularly to keep your bearing in tip-top shape. Bearings with seals keep lubricants in and contaminants out, and come packed with grease. Open bearings require initial lubrication and offer less protection against dust and debris.

Locknut—Tighten the nut for a strong hold that stands up to heavy vibrations without letting go. An adapter sleeve is required and sold separately.

SKF—Manufactured in Europe with a strong focus on precision. The more precise the bearing, the more efficiently it will run.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

	Mounted Bearings												Required Adapter Sleeves
		Overall, mm
	For Shaft Dia., mm	Lg.	Wd.	Flange Thk., mm	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Bearing Material	Bearing Seal Type	Misalignment Capability	Manufacturer		Each		Each
Powder-Coated Cast Iron Housing







				Locknut

				25	108	40.5	13	4,350	6,300	Steel	Sealed	1.5°	SKF	0000000	0000000	00000000	000000


				45	143	53.1	15	7,850	4,000	Steel	Sealed	1.5°	SKF	0000000	000000	00000000	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						Temp. Range, ° F
	For Shaft Dia.	For Housing ID	Wd.	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

				3/4"	1 27/32"	5/8"	2.063"	0.047"	Sealed	1	2,600	3,100	-20	220	IP69K	NSF Registered H1	0000000	0000000


				1"	2 3/64"	3/4"	2.266"	0.047"	Sealed	1	2,800	2,700	-20	220	IP69K	NSF Registered H1	0000000	000000
				1 3/16"	2 7/16"	7/8"	2.656"	0.063"	Sealed	1	4,350	2,300	-20	220	IP69K	NSF Registered H1	0000000	000000
				1 1/4"	2 27/32"	15/16"	3.078"	0.063"	Sealed	1	5,750	2,000	-20	220	IP69K	NSF Registered H1	0000000	000000
				25 mm	52 mm	19.1 mm	57.5 mm	1.2 mm	Sealed	1	2,800	2,700	-20	220	IP69K	NSF Registered H1	0000000	000000
				35 mm	72 mm	23.8 mm	78.2 mm	1.6 mm	Sealed	1	5,750	2,000	-20	220	IP69K	NSF Registered H1	0000000	000000
				40 mm	80 mm	27.8 mm	86.5 mm	1.6 mm	Sealed	1	7,300	1,750	-20	220	IP69K	NSF Registered H1	0000000	000000