28mm Bearings | McMaster-Carr

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	System of Measurement System of Measurement

Metric

	For Shaft Diameter For Shaft Diameter	Show

28mm

	For Shaft Diameter For Shaft Diameter	Hide

	OD OD

	ID ID

	Bearing Type Bearing Type


Ball	Plain

Roller

	For Shaft Type For Shaft Type


Round	Spline

	For Load Direction For Load Direction

	Radial
	Combined Radial and Thrust
	Thrust

	For Housing ID For Housing ID

	Plain Bearing Type Plain Bearing Type


Sleeve	Flanged

Thrust

	Ball Material Ball Material

Steel

Stainless Steel

	Length Length

	Dynamic Radial Load Capacity Dynamic Radial Load Capacity

	Lubrication Lubrication

Lubricated

Required

Not Required

	Minimum Temperature Minimum Temperature

	Maximum Temperature Maximum Temperature

Less than 250° F

250° to 499° F

500° to 999° F

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Material Material

863 Iron-Copper

Bronze

Plastic

	Cage Material Cage Material

Steel

Plastic

	Width Width

15mm

16 mm

20 mm

	Thickness Thickness

0.8mm

1.500mm

11.11mm

	Dynamic Thrust Load Capacity Dynamic Thrust Load Capacity

	Washer Material Washer Material

Steel

Stainless Steel

	Shaft Mount Type Shaft Mount Type

Press Fit

Slip Fit

Clamp On

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About Linear Bearings

About Plain Bearings

About Ball and Roller Bearings

About Shaft Collars

Shaft collars are useful for holding and positioning components on a shaft. They can also serve as mechanical stops and stroke limiters.

Steel balls and washers allow these bearings to handle higher loads than bearings with stainless steel components. With an open design, they dissipate heat more efficiently than one-piece thrust ball bearings.

For technical drawings and 3-D models, click on a part number.

					Thrust Load Cap., lbs.
For Shaft Dia.	OD	Thick.	Cage Material	Washer Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	Includes		Each
Open
28mm	44mm	11.11mm	Nylon Plastic	Steel	50	500	5,000	Required	-40° to 220°	Two Washers	0000000	00000

Corrosion-Resistant Thrust Ball Bearings

A combination of stainless steel and nylon components provide increased corrosion resistance over standard thrust ball bearings. With an open design, they dissipate heat more efficiently than one-piece thrust ball bearings.

For technical drawings and 3-D models, click on a part number.

					Thrust Load Cap., lbs.
For Shaft Dia.	OD	Thick.	Cage Material	Washer Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	Includes		Each
Open
28mm	44mm	11.11mm	Nylon Plastic	410 Stainless Steel	50	350	5,000	Required	-40° to 220°	Two Washers	0000000	000000

Oil-Embedded Sleeve Bearings

Startup friction causes these porous bronze bearings to release a thin layer of oil on the bearing’s surface. They are also known as Oilite® bearings.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Metric 841 Bronze Bearings

For 28 mm Shaft Dia.
For Housing ID, mm	Lg., mm	Dynamic Radial Load Capacity	Lubrication	Lubricant	Temperature Range, °F		Each
32	22	1,900 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	00000
32	28	2,400 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	0000
33	20	1,700 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	0000
33	30	2,550 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	0000
36	20	1,700 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	0000
36	22	1,900 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	0000
36	25	2,100 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	0000
36	30	2,550 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	0000
36	40	3,400 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	00000

High-Load Oil-Embedded Sleeve Bearings

Increased iron content makes these bearings stronger and more resistant to shock loads than standard oil-embedded bearings; however they operate at lower speeds. Startup friction causes them to release a thin layer of oil on the bearing’s surface. Color is silver because of the iron. These bearings are also magnetic due to the high iron content.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

863 Iron-Copper Bearings

For 28mm Shaft Dia.
For Housing ID	Lg.	Dynamic Radial Load Capacity	Lubrication	Lubricant	Temperature Range, °F		Each
32mm	22mm	3,800 lbs. @ 30 rpm	Lubricated	SAE 90 Oil	-15° to 300°	00000000	000000

Ultra-Low-Friction Oil-Embedded Sleeve Bearings

For applications with frequent starts and stops, the oil in these bearings contains particles of slippery PTFE that lubricate the bearing during startup.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Metric 841 Bronze Bearings

For 28mm Shaft Dia.
For Housing ID, mm	Lg., mm	Dynamic Radial Load Capacity	Lubrication	Lubricant	Temperature Range, °F		Each
32	22	1,900 lbs. @ 30 rpm	Lubricated	SAE 20 Oil with PTFE	-60° to 300°	00000000	00000

Food Industry Oil-Embedded Sleeve Bearings

The oil in these bearings is suitable for incidental contact with food. Startup friction produces a thin layer of oil on the bearing’s surface.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

841 Bronze Bearings

For 28mm Shaft Dia.
For Housing ID	Lg.	Dynamic Radial Load Capacity	Lubrication	Lubricant	Temperature Range, °F		Each
32mm	22mm	1,900 lbs. @ 30 rpm	Lubricated	SAE 20 Oil	-75° to 300°	00000000	000000

High-Load Food Industry Oil-Embedded Sleeve Bearings

Embedded with oil that is safe for incidental contact with food, these bearings are suitable for use in high-load applications such as bottling and filling lines in food processing plants. They are also known as Super Oilite® bearings. Startup friction releases the embedded oil onto their surface in a thin layer. Bearings are made of 863 iron-copper, which makes these bearings strong and resistant to shock loads.

Bearings with NSF H1 registered lubrication comply with NSF standards for incidental contact with food.

For technical drawings and 3-D models, click on a part number.

863 Iron-Copper
For Housing ID	Length	Dynamic Radial Load Capacity	Lubrication	Lubricant	Temperature Range, °F	Specifications Met		Each
For 28mm Shaft Dia.
32mm	22mm	3,800 lbs. @ 30 rpm	Lubricated	SAE 20 Oil	-75° to 300°	ASTM B439, NSF Registered H1	00000000	000000

High-Load Ultra-Low-Friction Oil-Embedded Sleeve Bearings

Use these bearings for frequent starts and stops in high-load applications. Startup friction causes these bearings to release a thin layer of oil that contains PTFE to lubricate the bearing’s surface. All have more iron content than standard oil-embedded bearings to handle heavier loads and higher shock loads, but operate at lower speeds.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

863 Bearing Bronze
For Housing ID, mm	Length, mm	Dynamic Radial Load Capacity	Lubrication	Lubricant	Temperature Range, °F		Each
For 28 mm Shaft Dia.
32	22	3,800 lbs. @ 30 rpm	Lubricated	SAE 20 Oil with PTFE	-60° to 300°	00000000	000000

Light Duty Dry-Running Sleeve Bearings

Use where high loads and speeds are not required.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Metric Nylon Bearings
For Housing ID	Lg.	Dynamic Radial Load Capacity	Color	Temperature Range, °F		Each
For 28mm Shaft Dia.
32mm	22mm	270 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	000000
32mm	28mm	350 lbs. @ 30 rpm	Off-White	-10° to 220°	0000000	00000
33mm	20mm	250 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000
33mm	30mm	370 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000
36mm	20mm	250 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000
36mm	22mm	270 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000
36mm	25mm	310 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000
36mm	30mm	370 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000
36mm	40mm	500 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000

Chemical-Resistant Dry-Running Sleeve Bearings

Fiberglass-Backed PTFE Plastic

These bearings stand up to a wider range of chemicals than other dry-running sleeve bearings.

Fiberglass-backed PTFE are strong and vibration resistant. A layer of PTFE on the ID of the bearing reduces friction.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

Metric Fiberglass-Backed PTFE Plastic Bearings
For Housing ID	Lg.	Dynamic Radial Load Cap.	Color	Temp. Range, °F		Each
For 28mm Shaft Dia.
38mm	20mm	9,000 lbs. @ 10 rpm	Gray	-145° to 320°	00000000	000000
38mm	30mm	13,500 lbs. @ 10 rpm	Gray	-145° to 320°	00000000	00000
38mm	40mm	18,000 lbs. @ 10 rpm	Gray	-145° to 320°	00000000	00000

Multipurpose Sleeve Bearings

These 660 leaded bronze bearings are strong, wear resistant, and excellent at handling shock loads. They’re sometimes called 932 bronze bearings.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Metric 660 Leaded Bronze Bearings
For Housing ID	Lg.	Dynamic Radial Load Capacity	Lubrication	Temperature Range, °F		Each
For 28mm Shaft Dia.
35mm	25mm	4,300 lbs. @ 30 rpm	Required	-350° to 450°	00000000	000000
35mm	40mm	6,900 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000

Corrosion-Resistant Sleeve Bearings

The addition of iron and aluminum gives these bearings high strength and excellent corrosion resistance—making them suitable for use in marine and mining applications.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Metric 954 Aluminum-Bronze Bearings
For Housing ID	Lg.	Dynamic Radial Load Capacity	Lubrication	Temperature Range, °F		Each
For 28mm Shaft Dia.
35mm	100mm	62,650 lbs. @ 30 rpm	Required	-350° to 500°	00000000	000000

Light Duty Dry-Running Flanged Sleeve Bearings

Use where high loads and speeds are not required.

Thermoplastic-blend bearings have low moisture absorption and create very low friction in applications with light loads, and frequent starts and stops.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Thermoplastic-Blend Bearings
For Housing ID	Lg.	Flange OD	Flange Thick.	Dynamic Radial Load Capacity	Dynamic Thrust Load Capacity	Color	Temperature Range, °F		Each
For 28mm Shaft Dia.
32mm	7mm	35mm	2mm	340 lbs. @ 30 rpm	480 lbs. @ 30 rpm	Yellow	-50° to 190°	00000000	00000

Multipurpose Flanged Sleeve Bearings

These leaded bronze bearings are strong, wear resistant, and excellent at handling shock loads. They’re sometimes called 932 bronze bearings.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Metric 660 Leaded Bronze Bearings
For Housing ID	Lg.	Flange OD	Flange Thick.	Dynamic Radial Load Capacity	Dynamic Thrust Load Capacity	Lubrication	Temperature Range, °F		Each
For 28mm Shaft Dia.
33mm	20mm	40mm	4mm	3,450 lbs. @ 30 rpm	3,950 lbs. @ 30 rpm	Required	-350° to 450°	00000000	000000
33mm	25mm	40mm	4mm	4,300 lbs. @ 30 rpm	3,950 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000
33mm	32mm	40mm	4mm	5,550 lbs. @ 30 rpm	3,950 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000
36mm	20mm	44mm	4mm	3,450 lbs. @ 30 rpm	5,600 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000
36mm	25mm	44mm	4mm	4,300 lbs. @ 30 rpm	5,600 lbs. @ 30 rpm	Required	-350° to 450°	0000000	00000
36mm	32mm	44mm	4mm	5,550 lbs. @ 30 rpm	5,600 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000

Light Duty Dry-Running Thrust Bearings

Use where high loads and speeds are not required.

Thermoplastic bearings are fiber reinforced and lubricant infused for good wear resistance and low friction with light and medium loads.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Thermoplastic Blend Bearings
OD	Thick.	Dynamic Thrust Load Capacity	Color	Temperature Range, °F		Each
For 28 mm Shaft Dia.
48mm	1.5mm	220 lbs. @ 30 rpm	Gray	-40° to 260°	0000000	00000

Ultra-Low-Friction Dry-Running Thrust Bearings

Use these bearings in applications with frequent starts and stops because they operate with very little friction.

PTFE bearings have good chemical resistance.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

PTFE Plastic Bearings
OD	Thick.	Dynamic Thrust Load Capacity	Color	Temperature Range, °F		Each
For 28mm Shaft Dia.
47.5mm	1.5mm	32 lbs. @ 30 rpm	White	-450° to 500°	0000000	000000

Food Industry Dry-Running Thrust Bearings

Made of FDA listed materials for use in food applications, these bearings also withstand caustic and washdown environments.

Rulon 641 bearings are stronger than UHMW bearings and withstand a wider range of temperatures.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Metric Rulon 641 Plastic Bearings

For 28 mm Shaft Dia.
OD, mm	Thick., mm	Dynamic Thrust Load Capacity	Color	Temperature Range, °F	Specifications Met		Each
47.5	1.5	1,200 lbs. @ 30 rpm	White	-400° to 550°	FDA Compliant 21 CFR 177.1550, USP Class VI	0000000	000000
54.4	0.8	1,550 lbs. @ 30 rpm	White	-400° to 550°	FDA Compliant 21 CFR 177.1550, USP Class VI	0000000	00000

High-Load Dry-Running Thrust Bearings

A steel backing adds strength to these slippery PTFE bearings.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Steel-Backed PTFE Plastic Bearings
OD, mm	Thick., mm	Dynamic Thrust Load Capacity	Temperature Range, °F		Each
For 28 mm Shaft Dia.
48	1.5	6,200 lbs. @ 30 rpm	-320° to 530°	0000000	000000

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 bearings dissipate heat more efficiently than sealed bearings.

Sealed bearings block out dust better than open bearings, but retain more heat.

For technical drawings and 3-D models, click on a part number.

				Radial Load Cap., lbs.
For Shaft Dia.	For Housing ID	Wd.	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	For Shaft Surface Smoothness (Ra), microinch	Temp. Range, °F	Specifications Met		Each
Open
28mm	35mm	16mm	Steel	3,650	5,950	9,200	Required	8	-20° to 280°	DIN 618, ISO 3245	0000000	000000
28mm	35mm	20mm	Steel	4,650	8,050	9,200	Required	8	-20° to 280°	DIN 618, ISO 3245	00000000	00000
Sealed—Both Sides
28mm	35mm	20mm	Steel	3,650	5,950	5,500	Lubricated	8	0° to 210°	DIN 618	00000000	00000

Linear Bearings for Spline Shafts

With a grooved inner diameter, these bearings are designed to work with splined shafts. Together, they transmit rotary power while allowing the bearing to move freely along the length of the shaft. All are for use where shaft misalignment is unlikely.

Also known as ball splines, ball bearings run with less friction than plain bearings, so they're smoother and more precise, even at high speeds. However, they don't transmit as much torque as plain bearings. They're commonly used for robotic systems and other automated applications that require complex, fast movements.

For technical drawings and 3-D models, click on a part number.

Steel Ball Bearings

Ball Bearing with Steel Balls

For Four Splines

Fixed Alignment
For No. of Splines	For Shaft Dia., mm	Overall Lg., mm	OD, mm	Max. Torque, in.-lbs.	Max. Temperature, °F		Each
4	28	80	45	2,557	176°	00000000	0000000

Steel Spline Shafts

Splined End × Step-Down End

Four Splines

				Step
Dia., mm	Lg., mm	Spline Lg., mm	End Type	Dia., mm	Lg., mm		Each
4 Splines
28	450	300	Splined End × Step-Down End	25	150	00000000	0000000

Mounted Linear Bearings for Spline Shafts

A flanged housing with mounting holes connects these bearings directly to your system. They have a grooved inner diameter that's designed to work with spline shafts. Together, they transmit rotary power while allowing the bearing to move freely along the length of the shaft. Wide and flat, the flange is especially useful for lifting and lowering loads on vertical shafts. All are for use where shaft misalignment is unlikely.

For technical drawings and 3-D models, click on a part number.

Steel Ball Bearings with Steel Housing

Steel Ball Bearing with Steel Housing

For Four Splines

								Mounting Holes
For No. of Splines	For Shaft Dia., mm	Overall Lg., mm	Flange OD, mm	Bolt Circle Dia., mm	OD, mm	Max. Torque, in.-lbs.	Max. Temperature, ° F	No. of	Thread Size		Each
Fixed Alignment
4	28	80	70	54	45	2,557	176°	4	M6 × 1	00000000	0000000

Steel Spline Shafts

Splined End × Step-Down End

Four Splines

				Step
Dia., mm	Lg., mm	Spline Lg., mm	End Type	Dia., mm	Lg., mm		Each
4 Splines
28	450	300	Splined End × Step-Down End	25	150	00000000	0000000

Washdown Clamping Shaft Collars

Suitable for use in washdown applications, these plastic collars also offer good chemical resistance. They clamp evenly around the shaft to create a strong, mar-free hold. To use, slide onto your shaft and tighten the clamping screw to secure.

Acetal collars have a naturally slippery surface and resist swelling when exposed to moisture.

For technical drawings and 3-D models, click on a part number.

Metric

			Clamping Screw		White Acetal Plastic
For Shaft Dia., mm	OD, mm	Wd., mm	Type	No. Included		Each
28	48	15	Socket Head Screw	1	00000000	000000