Brass Cage Bearings | McMaster-Carr

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System of Measurement

Shaft Diameter

Bearing Seal Type

Width

Bearing Type

Shaft Mount Type

For Load Direction

Combined Radial, Thrust, and Moment

Ball Bearing Profile

Material

Maximum Rotation Speed

Bearing Construction

Inner Ring Type

Dynamic Radial Load Capacity

Less than 10,000 lb.

10,000 lb. to 19,999 lb.

Shaft Type

Bearing Trade Number

Static Radial Load Capacity

Less than 10,000 lb.

10,000 lb. to 99,999 lb.

Cage Material

ABEC Rating

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

RoHS

Compliant

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

51 Products

Ball Bearing Profile

Standard

The most common profile for reducing friction between rotating parts

15 products

With Retaining Ring

Install without complicated tools

36 products

Ball Bearing Type

Four-Point Contact

Support complex movement in multiple directions

15 products

Performance

Quick Mount

Slip onto a shaft and secure with the turn of a screw

36 products

Four-Point Angular Contact Ball Bearings

Support complex movement in multiple directions with a single compact bearing. The balls distribute weight at four points, so these bearings handle radial, thrust, and moment loads all at once. For example, you’ll often find them in robot arms, which rotate, extend, and twist while supporting an object’s weight. Thinner than two standard angular contact ball bearings paired together, these bearings squeeze into tight spaces. They’re commonly paired with large hollow shafts to run electrical wire and other lines.

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.

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.

					Dynamic Load Cap.					Temp. Range, ° F
	For Shaft Dia.	For Housing ID	Wd.	ABEC Rating	Radial, lb.	Thrust, lb.	Moment, ft·lbf	Max. Rotation Speed, rpm	Contact Angle	Min.	Max.	Inner Ring Type		Each
Open







				Steel

				2"	2 1/2"	1/4"	1F	510	790	35	1,500	30°	-60	250	Standard	6656K11	0000000


				2"	2 5/8"	5/16"	1F	750	1,100	50	1,500	30°	-60	250	Standard	6656K19	000000
				2 1/2"	3"	1/4"	1F	580	910	50	1,200	30°	-60	250	Standard	6656K12	000000
				2 1/2"	3 1/8"	5/16"	1F	840	1,250	70	1,200	30°	-60	250	Standard	6656K21	000000
				3"	3 1/2"	1/4"	1F	640	1,000	65	800	30°	-60	250	Standard	6656K13	000000
				3"	3 5/8"	5/16"	1F	930	1,400	95	1,000	30°	-60	250	Standard	6656K22	000000
				3 1/2"	4"	1/4"	1F	700	1,100	80	700	30°	-60	250	Standard	6656K14	000000
				3 1/2"	4 1/8"	5/16"	1F	1,000	1,550	120	700	30°	-60	250	Standard	6656K23	000000
				4"	4 1/2"	1/4"	1F	750	1,200	100	600	30°	-60	250	Standard	6656K15	000000
				4"	4 5/8"	5/16"	1F	1,050	1,700	140	600	30°	-60	250	Standard	6656K24	000000
				5"	5 1/2"	1/4"	1F	850	1,400	130	500	30°	-60	250	Standard	6656K16	00000000


				5"	5 5/8"	5/16"	1F	1,200	1,950	200	500	30°	-60	250	Standard	6656K25	00000000
				6"	6 1/2"	1/4"	1F	950	1,550	180	300	30°	-60	250	Standard	6656K17	00000000
				6"	6 5/8"	5/16"	1F	1,350	2,200	260	400	30°	-60	250	Standard	6656K26	00000000
				7"	7 1/2"	1/4"	1F	1,000	1,700	230	200	30°	-60	250	Standard	6656K18	00000000

Quick-Mount Ball Bearings

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						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
Set-Screw Shaft Mount







				Black-Oxide Steel

				15/16"	2 3/64"	3/4"	2.266"	0.047"	Sealed	1	2,800	6,350	-20	220	ER15	8090T27	0000000


				1 1/16"	2 7/16"	7/8"	2.656"	0.063"	Sealed	1	4,350	5,450	-20	220	ER17	8090T28	000000
				1 5/8"	3 11/32"	1 3/32"	3 19/32"	0.063"	Sealed	1	7,900	3,800	-20	220	ER26	8090T34	000000
				1 11/16"	3 11/32"	1 3/32"	3 19/32"	0.063"	Sealed	1	7,900	3,800	-20	220	ER27	8090T35	000000
				2 3/16"	3 15/16"	1 3/16"	4 3/16"	0.094"	Sealed	1	9,750	3,250	-20	220	ER35	8090T39	000000
				2 1/4"	4 21/64"	1 1/4"	4 37/64"	0.094"	Sealed	1	11,750	3,000	-20	220	ER36	8090T41	000000
				2 3/8"	4 21/64"	1 1/4"	4 37/64"	0.094"	Sealed	1	11,750	3,000	-20	220	ER38	8090T42	000000
				2 7/16"	4 21/64"	1 1/4"	4 37/64"	0.094"	Sealed	1	11,750	3,000	-20	220	ER39	8090T43	000000
				2 1/2"	4 59/64"	1 3/8"	5 9/32"	0.109"	Sealed	1	13,950	2,500	-20	220	ER40	8090T44	000000
				3"	5 33/64"	1 11/16"	5 13/16"	0.109"	Sealed	1	17,400	2,250	-20	220	ER48	8090T48	000000
				20 mm	47 mm	15.9 mm	52.4 mm	1.2 mm	Sealed	1	2,600	7,300	-20	220	ER204	5629N11	000000


				25 mm	52 mm	19.1 mm	57.5 mm	1.2 mm	Sealed	1	2,800	6,350	-20	220	ER205	5629N12	000000
				30 mm	62 mm	22.2 mm	67.5 mm	1.6 mm	Sealed	1	4,350	5,450	-20	220	ER206	5629N13	000000
				35 mm	72 mm	23.8 mm	78.2 mm	1.6 mm	Sealed	1	5,750	4,650	-20	220	ER207	5629N14	000000
				40 mm	80 mm	27.8 mm	86.5 mm	1.6 mm	Sealed	1	7,300	4,150	-20	220	ER208	5629N15	000000
				50 mm	90 mm	28.6 mm	96 mm	2.4 mm	Sealed	1	7,850	3,550	-20	220	ER210	5629N17	000000
				70 mm	125 mm	34.9 mm	134.1 mm	2.8 mm	Sealed	1	13,950	2,500	-20	220	ER214	5629N21	000000


				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	6821N11	00000


								1"	2 1/16"	3/4"	2.266"	0.047"	Sealed	1	2,800	9,000	-20	220	ER16	6821N12	00000
								1 1/4"	2 7/16"	7/8"	2.656"	0.063"	Sealed	1	4,350	7,600	-20	220	ER20	6821N15	000000
								1 1/4"	2 27/32"	15/16"	3.078"	0.063"	Sealed	1	5,750	6,500	-20	220	ER20	6821N16	000000
								1 7/16"	2 27/32"	15/16"	3.078"	0.063"	Sealed	1	5,750	6,500	-20	220	ER23	6821N18	000000
								1 1/2"	3 5/32"	1 3/32"	3.406"	0.063"	Sealed	1	7,300	5,850	-20	220	ER24	6821N19	000000
								2"	3 15/16"	1 3/16"	4.188"	0.094"	Sealed	1	9,750	4,500	-20	220	ER32	6821N25	000000
								20 mm	47 mm	16 mm	52 mm	1.2 mm	Shielded	1	2,600	6,450	-20	220	ER204	6821N51	000000
								25 mm	52 mm	19 mm	58 mm	1.2 mm	Shielded	1	2,800	6,350	-20	220	ER205	6821N52	000000
								30 mm	62 mm	22 mm	68 mm	1.6 mm	Shielded	1	4,350	5,450	-20	220	ER206	6821N53	000000
								40 mm	80 mm	28 mm	88 mm	1.6 mm	Shielded	1	7,300	4,150	-20	220	ER208	6821N55	000000


								45 mm	85 mm	28 mm	91 mm	1.6 mm	Shielded	1	7,900	3,800	-20	220	ER209	6821N56	000000

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	7177N11	0000000


				1"	2 3/64"	3/4"	2.266"	0.047"	Sealed	1	2,800	2,700	-20	220	IP69K	NSF Registered H1	7177N12	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	7177N14	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	7177N16	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	7177N26	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	7177N28	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	7177N29	000000