27mm OD Bearings | McMaster-Carr

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About Ball and Roller Bearings

About Plain Bearings

A solid polymer lubricant surrounds the balls, eliminating the need for additional lubrication. The solid lubricant blocks out water and dust, extending the life of the bearing.

Sealed bearings have even better resistance to dust and contaminants than open bearings.

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

Metric Bearings

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating		Each
Open
6704	20	27	4	440C Stainless Steel	310	160	12,000	Lubricated	-10° to 200°	ABEC-1	00000000	000000
Sealed
6704-2RS	20	27	4	440C Stainless Steel	310	160	12,000	Lubricated	-10° to 200°	ABEC-1	00000000	00000

Food Industry Permanently Lubricated Stainless Steel Ball Bearings

Good for applications with incidental food contact, these 440C stainless steel bearings have a food-grade, solid polymer lubricant between the balls and ring that eliminates the need for additional lubrication. The solid lubricant blocks out water and dust, extending the life of the bearing.

Sealed bearings have even better resistance to dust and contaminants than open bearings.

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

Metric Bearings

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating	Specifications Met		Each
Sealed
6704-2RS	20	27	4	440C Stainless Steel	225	160	8,500	Lubricated	-40° to 200°	ABEC-1	FDA Compliant 21 CFR 178.3570	00000000	000000

Flanged Ultra-Thin Ball Bearings

Open

Shielded

Flanged Bearing

Flanged and creating twice as many contact points as angular-contact ball bearings, these bearings ensure correct positioning within a tube or housing and resist radial loads.

Open bearings dissipate heat more efficiently than shielded bearings.

Shielded bearings block out dust and other contaminants, but do not dissipate heat as efficiently as open bearings.

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

			Flange		Radial Load Cap., lbs.
For Shaft Diameter, mm	For Housing ID, mm	Width, mm	OD, mm	Thickness, mm	Dynamic	Static	Max. Speed, rpm	Lubrication	Temperature Range, °F	ABEC Rating		Each
Steel Ring
Open
20	27	4	28.5	0.8	225	160	10,000	Lubricated	-50° to 280°	ABEC-1	00000000	000000
Shielded
20	27	4	28.5	0.8	225	160	8,500	Lubricated	-50° to 300°	ABEC-1	00000000	00000

Ultra-Thin Ball Bearings

Open

Shielded

These bearings have twice as many contact points as angular-contact ball bearings. Fit onto large-diameter hollow shafts to run air and hydraulic lines, electrical wiring, and other components through moving parts in assemblies such as index and rotary tables, packaging equipment, and robotics.

440 stainless steel bearings are more corrosion resistant than steel bearings.

Open bearings dissipate heat more efficiently than shielded bearings.

Shielded bearings block out dust and other contaminants, but do not dissipate heat as efficiently as open bearings.

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

			Radial Load Cap., lbs.		Thrust Load Cap., lbs.		Moment Load Cap., ft.-lbs.
For Shaft Dia.	For Housing ID	Wd.	Dynamic	Static	Dynamic	Static	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating		Each
Steel Ring
Open
20mm	27mm	4mm	310	160	Not Rated	Not Rated	Not Rated	Not Rated	10,000	Lubricated	-50° to 130°	ABEC-1	00000000	000000
Shielded
20mm	27mm	4mm	310	160	Not Rated	Not Rated	Not Rated	Not Rated	8,500	Lubricated	-40° to 150°	ABEC-1	00000000	00000
440 Stainless Steel Ring
Open
20mm	27mm	4mm	310	160	Not Rated	Not Rated	Not Rated	Not Rated	10,000	Lubricated	-50° to 130°	ABEC-1	00000000	00000

Water-Resistant Dry-Running Sleeve Bearings

Good for underwater applications, these bearings won’t swell or warp when wet.

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.

Rulon LR Plastic Bearings
ID	For Housing ID	Lg.	Dynamic Radial Load Capacity	Color	Temperature Range, °F		Each
For 22mm Shaft Dia.
22.1mm	27mm	22mm	550 lbs. @ 60 rpm	Maroon	-400° to 550°	0000000	000000

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	Temp. Range, °F		Each
For 11 mm Shaft Dia.
27mm	0.5mm	75 lbs. @ 120 rpm	Gray	-40° to 260°	0000000	00000