28mm ID Bearings | McMaster-Carr

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



		28	35	16	3,650	5,950	9,200	Required	8	-20 to 280	DIN 618, ISO 3245	5905K55	000000


		28	35	20	4,650	8,050	9,200	Required	8	-20 to 280	DIN 618, ISO 3245	5905K551	00000

Dry-Running Flanged Sleeve Bearings

Made of naturally slippery plastic so you’ll never have to add lubricant. They’re ideal for clean environments where you need to prevent oil drips or graphite flakes. Compared to metal bearings, they are lighter and will never rust.

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.

Moisture-Resistant Ultra-Low-Friction Plastic Blend—These bearings won't warp or swell from humidity or direct contact with water. They glide effortlessly for applications with frequent starts and stops, such as conveyor systems.

	For Housing ID, mm	Lg., mm	Flange OD, mm	Flange Thk., mm	Dynamic Radial Load Cap. @ Speed	Dynamic Thrust Load Cap. @ Speed	Color	Temp. Range, ° F		Each
Moisture-Resistant Ultra-Low-Friction Plastic Blend



	28	32	7	35	2	340 lb. @ 30 rpm	480 lb. @ 30 rpm	Yellow	-50 to 190	2705T179	00000

Ready-Mount Bearing Housings with Base Mount

Mount bearings quickly by using these precision housings, which don’t require any machining. They support a shaft that’s parallel to their mounting surface and let you replace the bearings as needed. Made of aluminum, they’re lightweight, durable, and have good corrosion resistance.

	For Bearing, mm			Overall, mm			Mounting
	OD	Wd.	Ctr. Ht., mm	Ht.	Lg.	Wd.	Hole Dia.	Hole Ctr.-to-Ctr., mm		Each
2014 Aluminum Housing



		28	16	19	40	83	16	11/32"	64	3971N119	000000

Dry-Running Sleeve Bearings

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.

Nylon—The most popular choice, nylon is wear resistant yet economical. Keep in mind, though, that it will swell and weaken when exposed to moisture.

								Each
	For Shaft Dia., mm	For Housing ID, mm	Lg., mm	Dynamic Radial Load Cap. @ Speed	Color	Temp. Range, ° F		1-24	25-99	100-Up
Nylon



		28	32	28	350 lb. @ 30 rpm	Off-White	-10 to 220	6389K89	000000	000000	000000


		28	36	30	370 lb. @ 30 rpm	Off-White	-10 to 220	6389K896	00000	00000	00000

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



	28	44	11.11	Nylon	500	5,000	-40 to 220	Two Washers	6655K61	000000

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.

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.

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	Dynamic Radial Load Cap. @ Speed	Temp. Range, ° F		Each
High-Load 932 Bearing Bronze



	28	35	25	4,300 lb. @ 30 rpm	-350 to 450	7811K269	000000


	28	35	40	6,900 lb. @ 30 rpm	-350 to 450	7811K271	00000


	High-Load Chemical-Resistant 954 Bearing Bronze



			28	35	100	19,500 lb. @ 30 rpm	-350 to 500	2867T142	00000

Dry-Running Metal-Reinforced Plastic Thrust Bearings

Combine naturally slippery PTFE with the strength of metal. These bearings don't need lubricant, so there's no oil to maintain, drip off, or attract dust. Backed with steel, they're as strong as other all-metal thrust bearings. However, they're best for dry environments since moisture will cause the steel to rust.

	OD, mm	Thk., mm	Dynamic Thrust Load Cap. @ Speed	Temp. Range, ° F		Each
Steel-Backed PTFE



	28	48	1.5	6,200 lb. @ 30 rpm	-320 to 530	1262N16	000000

Dry-Running Thrust 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'll also never rust.

Moisture-Resistant Plastic Blend—Similar to acetal, these bearings won't warp or swell from water or humidity.

	OD, mm	Thk., mm	Dynamic Thrust Load Cap. @ Speed	Color	Temp. Range, ° F		Each
Moisture-Resistant Plastic Blend



	28	48	1.5	195 lb. @ 30 rpm	Gray	-40 to 260	8920N71	00000

Quick-Disconnect (QD) Bushings


Clamp-On Shaft Mount

The screw connections on these bushings easily mate to compatible quick-disconnect sprockets and pulleys. Bushings fit quick-disconnect (QD) sprockets and pulleys of the same bushing trade number. As you tighten the included screws, the bushing grips the shaft and pulls it into the sprocket or pulley.

		Keyway, mm
	Overall Wd., mm	Wd.	Dp.	Fastener Tightening Torque, in·lbf	Material	Includes	For Shaft Dia., mm		Each
Clamp-On Shaft Mount







				Bushing Trade Number SD

				46	8	3.3	108	Sintered Steel	Clamping Screws	28	2344K33	000000




						Bushing Trade Number SDS

						35	8	3.3	108	Sintered Steel	Clamping Screws	28	2344K23	00000




								Bushing Trade Number SH

								33	8	3.3	108	Sintered Steel	Clamping Screws	28	2344K13	00000




										Bushing Trade Number SK

										49	8	3.3	180	Sintered Steel	Clamping Screws	28	2344K43	00000

Metric Press-Fit Drill Bushings

Also known as jig bushings, these metric drill bushings fit inside fixture plate holes to precisely guide drill bits, counterbores, reamers, and other cutting tools. They improve accuracy so that your drilled holes and cuts are consistent from part to part. Known for their versatility, drill bushings are also used as spacers, shims, and machinery bushings. These bushings are made of hardened, ground steel that holds its shape and resists wear, so they last for many cycles without needing to be replaced.

All bushings have a chamfer on the outside that centers the bushing as you place it into the hole. Press into place with a manual or hydraulic press. Since the bushing is sized slightly larger than the hole for an extremely tight fit, it’ll stay put permanently. These are ANSI Type PM bushings—also known as headless bushings—which means you don’t need to counterbore the hole to mount them flush.

They also have an internal chamfer that makes it easy to insert bits, pins, and punches without damaging the bushing or misaligning tools.

Don't see the size you need? Additional sizes are available.

DIN 179—DIN 179 bushings meet dimensional and material standards that make sure they're compatible with other parts and tools. Although DIN 179 is no longer an active standard, it's still a common reference point for designers.

						Tolerance, mm								Each
	OD, mm	Lg., mm	Internal Chamfer	For Drill Bit Size, mm	For Drill Bit Size Decimal Equiv.	ID	OD	Lg.	Drill Bushing Type	Material	Hardness	Specs. Met		1-5	6-11	12-Up
28 mm ID



		42	25	One End	28	1.1024"	0.02 to 0.041	0.017 to 0.033	-0.2 to 0.2	PM	Steel	Rockwell C61	DIN 179	96990A567	000000	000000	000000


		42	45	One End	28	1.1024"	0.02 to 0.041	0.017 to 0.033	-0.3 to 0.3	PM	Steel	Rockwell C61	DIN 179	96990A568	00000	00000	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

Taper-Lock Bushings

Mount these hubless bushings flush into your sprocket or pulley for a slim profile with no protruding screws. They are for use with taper-lock sprockets of the same bushing trade number. As you tighten the included set screws, the bushing grips the shaft and pulls it into your sprocket or pulley.

			Keyway, mm
	For Shaft Dia., mm	Overall Wd., mm	Wd.	Dp.	Taper	Fastener Tightening Torque, in·lbf	Includes		Each
Steel







				Bushing Trade Number 1210

				28	25	8	3.3	8°	175	Set Screws	57095K456	000000




						Bushing Trade Number 1610

						28	25	8	3.3	8°	175	Set Screws	57095K498	00000




								Bushing Trade Number 1615

								28	38	8	3.3	8°	175	Set Screws	57095K531	00000




										Bushing Trade Number 2012

										28	32	8	3.3	8°	280	Set Screws	57095K553	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 Press-Fit Drill Bushings with Head


Shown in Countersunk Hole	Shown in Standard Hole

Even under extreme drilling pressure, these metric bushings won't press through your jig plate. They’re ANSI Type H bushings, also known as headed bushings. A flanged head acts as a stop, so these bushings won’t move as you push down your drill bit, reamer, or other cutting bit. Use them even in jigs made of thin or soft materials—the head adds support to protect your jig from damage caused by heavy use. Drill bushings ensure accurate, consistent cuts and drilled holes from one part to the next. They’re also used as spacers, shims, and machinery bushings. Made of hardened, ground steel, these bushings hold their shape and resist wear, so they last for many cycles without needing to be replaced.

These bushings meet DIN 172 dimensional standards. This standard is no longer active, but it’s often used as a reference point for making sure parts are compatible with other parts and tools.

To install, fit the bushing into a hole in your jig. In a standard hole, the head will sit above the jig plate; to mount flush, install in a countersunk hole. A chamfered edge on the bottom of the bushing helps center the bushing in the hole. Once it’s centered, press the bushing into the hole with a hydraulic or lever press.

					Head, mm		Tolerance, mm								Each
	OD, mm	Lg., mm	For Drill Bit Size, mm	For Drill Bit Size Decimal Equiv.	OD	Thk.	ID	OD	Lg.	Drill Bushing Type	Material	Hardness	Specs. Met		1-5	6-11	12-Up
28 mm ID



		42	20	28	1.1024"	46	5	0.02 to 0.041	0.017 to 0.033	-0.2 to 0.2	H	Steel	Rockwell C61	DIN 172	96977A588	000000	000000	000000

Split-Tapered Bushings

Steel

Cast Iron

The tapered barrel on these bushings is split on both sides, allowing them to contract more tightly around the shaft than quick-disconnect and taper-lock bushings. They're for use with split-tapered sprockets and pulleys of the same bushing trade number. As you tighten the included screws, the bushing grips the shaft and pulls it into the sprocket or pulley.

Machine Key—Bushings with a machine key fit into a matching keyway on a sprocket or pulley for high-torque applications.

			Keyway, mm
	For Shaft Dia., mm	Overall Wd.	Wd.	Dp.	Taper	Fastener Tightening Torque, in·lbf		Each
Steel







				Bushing Trade Number H with Clamping Screws

				28	1 1/4"	8	3	3°	95	9859T723	000000


				Cast Iron







								Bushing Trade Number P1 with Clamping Screws, Machine Key

								28	1 15/16"	8	3	3°	192	9859T741	00000