50mm Spacers | McMaster-Carr

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	System of Measurement System of Measurement

Metric

	For Shaft Diameter For Shaft Diameter

40mm

45mm

	Plain Bearing Type Plain Bearing Type


Sleeve	Flanged

	OD OD

	ID ID

	Length Length

	For Housing ID For Housing ID	Show

50mm

	For Housing ID For Housing ID	Hide

	Material Material

863 Iron-Copper

Bronze

Plastic

	Bearing Type Bearing Type

	Plain

	Lubrication Lubrication

Not Required

Lubricated

Required

	For Load Direction For Load Direction


Radial	Combined Radial and Thrust

	Dynamic Radial Load Capacity Dynamic Radial Load Capacity

	Shaft Mount Type Shaft Mount Type

	Slip Fit

	For Shaft Type For Shaft Type

	Round

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

DFARS Specialty Metals
COTS-Exempt

	Minimum Temperature Minimum Temperature

	Maximum Temperature Maximum Temperature

Less than 250° F

300° to 499° F

500° to 999° F

	Color Color

	Blue		Gray
	Off-White		Yellow

	Lubrication Method Lubrication Method

Embedded

Grooved

	Flange OD Flange OD

58mm

60mm

	Flange Thickness Flange Thickness

2mm

5mm

	Lubricant Lubricant

	Dynamic Thrust Load Capacity Dynamic Thrust Load Capacity

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49 Products

About Plain 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 40mm Shaft Dia.
50mm	25mm	310 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	000000
50mm	30mm	370 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000
50mm	35mm	430 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000
50mm	40mm	500 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000
50mm	50mm	620 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000
50mm	60mm	750 lbs. @ 30 rpm	Off-White	-10° to 220°	00000000	00000

High-Temperature Dry-Running Sleeve Bearings

Graphite provides a layer of dry lubrication that operates in high-temperature environments.

954 aluminum-bronze bearings have high strength and excellent corrosion resistance, making them suitable for use in marine and mining applications.

Grooved bearings have a graphite-filled groove on the inside of the bearing that distributes lubricant evenly along 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.

Grooved

Metric 954 Aluminum-Bronze Bearings
For Housing ID	Lg.	Dynamic Radial Load Capacity	Lubrication Method	Temperature Range, °F		Each
For 45mm Shaft Dia.
50mm	40mm	10,850 lbs. @ 30 rpm	Grooved	-350° to 500°	00000000	000000
50mm	50mm	13,600 lbs. @ 30 rpm	Grooved	-350° to 500°	00000000	00000

Food Industry Dry-Running Sleeve Bearings

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

Acetal bearings are FDA compliant for direct contact with food. They’re also bright blue, making them easy to spot if they fall into your line.

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 Acetal Plastic Bearings
For Housing ID	Lg.	Dynamic Radial Load Capacity	Color	Temperature Range, °F	Specifications Met		Each
For 45mm Shaft Dia.
50mm	20mm	43 lbs. @ 30 rpm	Blue	-50° to 190°	FDA Compliant 21 CFR 177.1550	00000000	00000
50mm	40mm	43 lbs. @ 30 rpm	Blue	-50° to 190°	FDA Compliant 21 CFR 177.1550	00000000	0000

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 40mm Shaft Dia.
50mm	30mm	13,500 lbs. @ 10 rpm	Gray	-145° to 320°	00000000	000000
50mm	40mm	18,000 lbs. @ 10 rpm	Gray	-145° to 320°	00000000	00000
50mm	60mm	27,050 lbs. @ 10 rpm	Gray	-145° to 320°	00000000	00000

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 40 mm Shaft Dia.
For Housing ID, mm	Lg., mm	Dynamic Radial Load Capacity	Lubrication	Lubricant	Temperature Range, °F		Each
50	25	3,000 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	000000
50	30	3,700 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	00000
50	35	4,200 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	00000
50	40	4,950 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	00000
50	50	6,000 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	00000
50	60	7,400 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 40mm Shaft Dia.
For Housing ID	Lg.	Dynamic Radial Load Capacity	Lubrication	Lubricant	Temperature Range, °F		Each
50mm	30mm	5,250 lbs. @ 30 rpm	Lubricated	SAE 90 Oil	-15° to 300°	00000000	000000
50mm	40mm	7,000 lbs. @ 30 rpm	Lubricated	SAE 90 Oil	-15° to 300°	00000000	00000
50mm	60mm	10,500 lbs. @ 30 rpm	Lubricated	SAE 90 Oil	-15° to 300°	00000000	00000

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 40mm Shaft Dia.
For Housing ID, mm	Lg., mm	Dynamic Radial Load Capacity	Lubrication	Lubricant	Temperature Range, °F		Each
50	30	3,700 lbs. @ 30 rpm	Lubricated	SAE 20 Oil with PTFE	-60° to 300°	00000000	000000
50	40	4,950 lbs. @ 30 rpm	Lubricated	SAE 20 Oil with PTFE	-60° to 300°	00000000	00000
50	60	7,400 lbs. @ 30 rpm	Lubricated	SAE 20 Oil with PTFE	-60° to 300°	00000000	00000

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 40 mm Shaft Dia.
50	30	5,250 lbs. @ 30 rpm	Lubricated	SAE 20 Oil with PTFE	-60° to 300°	00000000	000000
50	40	7,000 lbs. @ 30 rpm	Lubricated	SAE 20 Oil with PTFE	-60° to 300°	00000000	00000
50	60	10,500 lbs. @ 30 rpm	Lubricated	SAE 20 Oil with PTFE	-60° to 300°	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 40mm Shaft Dia.
50mm	50mm	12,400 lbs. @ 30 rpm	Required	-350° to 450°	00000000	000000
50mm	65mm	16,100 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000
50mm	75mm	18,600 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000
50mm	100mm	24,800 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000
For 45mm Shaft Dia.
50mm	40mm	11,150 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000
50mm	50mm	13,950 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000
50mm	100mm	27,900 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000

Multipurpose Sleeve Bearings with Groove

A figure-8-shaped groove provides a flow path for lubricant, distributing it evenly along the bearing’s surface. Bearings are cast bronze, making them strong, wear resistant, and excellent at handling shock loads. 660 leaded bronze is sometimes called 932 bronze.

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 40mm Shaft Dia.
50mm	50mm	14,000 lbs. @ 30 rpm	Required	-350° to 450°	00000000	000000
50mm	65mm	18,200 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000
50mm	75mm	21,000 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000
50mm	100mm	28,000 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000
For 45mm Shaft Dia.
50mm	75mm	21,000 lbs. @ 30 rpm	Required	-350° to 450°	00000000	00000

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 45mm Shaft Dia.
50mm	20mm	58mm	2mm	970 lbs. @ 30 rpm	880 lbs. @ 30 rpm	Yellow	-50° to 190°	00000000	00000
50mm	50mm	58mm	2mm	2,400 lbs. @ 30 rpm	880 lbs. @ 30 rpm	Yellow	-50° to 190°	00000000	0000

Food Industry Dry-Running Flanged Sleeve Bearings

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

Acetal bearings are FDA compliant for direct contact with food. They’re commonly used on machines in food plants and manufacturing plants for packaging and healthcare equipment. These bearings are bright blue, so they’re easy to spot in your line in case of breakage.

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.

Acetal Plastic Bearings
For Housing ID	Lg.	Flange OD	Flange Thick.	Dynamic Radial Load Capacity	Dynamic Thrust Load Capacity	Color	Temperature Range, °F	Specifications Met		Each
For 45mm Shaft Dia.
50mm	50mm	58mm	2mm	2,150 lbs. @ 30 rpm	1,700 lbs. @ 30 rpm	Blue	-50° to 190°	FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 178.3297	000000000	00000

Multipurpose Dry-Running Flanged Sleeve Bearings

Reinforced with polyester fabric, these plastic bearings have load and speed capabilities comparable to metal bearings. Bearings resist corrosion in outdoor and saltwater environments.

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 Polyester Fabric-Reinforced PTFE Plastic Bearings
For Housing ID	Lg.	Flange OD	Flange Thick.	Dynamic Radial Load Capacity	Dynamic Thrust Load Capacity	Color	Temperature Range, °F		Each
For 40mm Shaft Dia.
50mm	30mm	60mm	5mm	3,750 lbs. @ 30 rpm	3,250 lbs. @ 30 rpm	Blue	-40° to 150°	0000000	000000

High-Load Dry-Running Flanged Sleeve Bearings

An aluminum shell adds strength. Made of Frelon, a PTFE composite, these bearings are both slippery and chemically inert.

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.

Frelon Plastic Bearings with 6061 Aluminum Shell
For Housing ID	Lg.	Flange OD	Flange Thick.	Dynamic Radial Load Capacity	Dynamic Thrust Load Capacity	Temperature Range, °F		Each
For 40mm Shaft Dia.
50mm	40mm	60mm	5mm	4,000 lbs. @ 30 rpm	2,600 lbs. @ 30 rpm	-400° to 400°	00000000	0000000

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	PV Max.		Each
For 40mm Shaft Dia.
50mm	25mm	60mm	5mm	6,200 lbs. @ 30 rpm	9,700 lbs. @ 30 rpm	Required	-350° to 450°	__	00000000	000000
50mm	30mm	60mm	5mm	7,400 lbs. @ 30 rpm	9,700 lbs. @ 30 rpm	Required	-350° to 450°	75,000	0000000	00000
50mm	35mm	60mm	5mm	8,650 lbs. @ 30 rpm	9,700 lbs. @ 30 rpm	Required	-350° to 450°	__	00000000	00000
50mm	40mm	60mm	5mm	9,900 lbs. @ 30 rpm	9,700 lbs. @ 30 rpm	Required	-350° to 450°	__	00000000	00000

About Plain Bearings

Light Duty Dry-Running Sleeve Bearings

High-Temperature Dry-Running Sleeve Bearings

Food Industry Dry-Running Sleeve Bearings

Chemical-Resistant Dry-Running Sleeve Bearings

Oil-Embedded Sleeve Bearings

High-Load Oil-Embedded Sleeve Bearings

Ultra-Low-Friction Oil-Embedded Sleeve Bearings

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

Multipurpose Sleeve Bearings

Multipurpose Sleeve Bearings with Groove

Light Duty Dry-Running Flanged Sleeve Bearings

Food Industry Dry-Running Flanged Sleeve Bearings

Multipurpose Dry-Running Flanged Sleeve Bearings

High-Load Dry-Running Flanged Sleeve Bearings

Multipurpose Flanged Sleeve Bearings