37mm OD Bearings | McMaster-Carr

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating	Specifications Met		Each
6301	12mm	37mm	12mm	Steel	2,150	940	28,500	Lubricated	-20° to 230°	ABEC-1	DIN 625-1	00000000	000000
6805	25mm	37mm	7mm	Steel	960	660	18,000	Lubricated	-20° to 230°	ABEC-1	__	00000000	00000
6904	20mm	37mm	9mm	Steel	1,400	830	19,000	Lubricated	-20° to 230°	ABEC-1	__	00000000	00000

Shielded

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating	Specifications Met		Each
6301-2Z	12mm	37mm	12mm	Steel	2,150	940	20,000	Lubricated	-20° to 230°	ABEC-1	DIN 625-1	00000000	000000
6805-2Z	25mm	37mm	7mm	Steel	960	660	18,000	Lubricated	-20° to 230°	ABEC-1	__	00000000	00000
6904-2Z	20mm	37mm	9mm	Steel	1,400	830	19,000	Lubricated	-20° to 230°	ABEC-1	__	00000000	00000

Sealed

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating	Specifications Met		Each
6301-2RS	12mm	37mm	12mm	Steel	2,150	940	13,000	Lubricated	-20° to 230°	ABEC-1	DIN 625-1	0000000	000000
6805-2RS	25mm	37mm	7mm	Steel	960	660	18,000	Lubricated	-20° to 230°	ABEC-1	__	00000000	00000
6904-2RS	20mm	37mm	9mm	Steel	1,400	830	19,000	Lubricated	-20° to 230°	ABEC-1	__	00000000	0000

Permanently Lubricated Ball Bearings

A solid polymer lubricant surrounds the balls, eliminating the need for additional lubrication. Because it's solid, the 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.

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating		Each
Open
6301	12mm	37mm	12mm	Steel	1,700	1,050	12,000	Lubricated	10° to 200°	ABEC-1	00000000	000000
6805	25mm	37mm	7mm	Steel	390	250	9,500	Lubricated	10° to 200°	ABEC-1	00000000	00000
6904	20mm	37mm	9mm	Steel	1,400	820	10,500	Lubricated	10° to 200°	ABEC-1	00000000	00000
Sealed
6301-2RS	12mm	37mm	12mm	Steel	1,700	1,000	12,000	Lubricated	10° to 200°	ABEC-1	00000000	00000
6805-2RS	25mm	37mm	7mm	Steel	850	560	9,600	Lubricated	10° to 200°	ABEC-1	00000000	00000
6904-2RS	20mm	37mm	9mm	Steel	1,430	820	10,500	Lubricated	10° to 200°	ABEC-1	00000000	00000

Precision Ball Bearings

Shielded

Sealed

For greater accuracy and higher speeds, these bearings are made to tighter tolerances than standard ball bearings.

Shielded bearings dissipate heat more efficiently than sealed bearings.

Sealed bearings block out dust and other contaminants better than shielded bearings.

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

					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
Shielded
6301-2Z	12	37	12	Steel	2,250	930	22,000	Lubricated	-20° to 230°	ABEC-3	0000000	000000
Sealed
6301-2RS	12	37	12	Steel	2,250	930	14,000	Lubricated	-30° to 210°	ABEC-3	00000000	00000

Stainless Steel Ball Bearings

Bearings are 440C stainless steel for good corrosion resistance.

Open bearings dissipate heat more efficiently than shielded and sealed 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.

Open

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating		Each
6301	12mm	37mm	12mm	440C Stainless Steel	1,850	750	25,000	Lubricated	-40° to 240°	ABEC-1	00000000	000000

Shielded

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating		Each
6301-2Z	12mm	37mm	12mm	440C Stainless Steel	1,850	750	22,000	Lubricated	-40° to 240°	ABEC-1	00000000	000000

Permanently Lubricated Stainless Steel Ball 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
6706	30	37	4	440C Stainless Steel	250	200	9,000	Lubricated	-10° to 200°	ABEC-1	00000000	000000
6904	20	37	9	440C Stainless Steel	1,400	820	10,000	Lubricated	-10° to 200°	ABEC-1	00000000	00000
Sealed
6301-2RS	12	37	12	440C Stainless Steel	1,700	1,000	12,000	Lubricated	-10° to 200°	ABEC-1	00000000	00000
6706-2RS	30	37	4	440C Stainless Steel	250	200	9,000	Lubricated	-10° to 200°	ABEC-1	00000000	00000
6805-2RS	25	37	7	440C Stainless Steel	960	650	9,000	Lubricated	-10° to 200°	ABEC-1	00000000	00000
6904-2RS	20	37	9	440C Stainless Steel	1,400	820	10,000	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
6301-2RS	12	37	12	440C Stainless Steel	1,850	750	12,000	Lubricated	-40° to 200°	ABEC-1	FDA Compliant 21 CFR 178.3570	0000000	000000
6805-2RS	25	37	7	440C Stainless Steel	820	520	9,000	Lubricated	-40° to 200°	ABEC-1	FDA Compliant 21 CFR 178.3570	00000000	00000
6904-2RS	20	37	9	440C Stainless Steel	1,200	660	10,000	Lubricated	-40° to 200°	ABEC-1	FDA Compliant 21 CFR 178.3570	00000000	00000
6706-2RS	30	37	4	440C Stainless Steel	250	210	5,500	Lubricated	-40° to 200°	ABEC-1	FDA Compliant 21 CFR 178.3570	00000000	00000

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
30	37	4	39	1	250	210	7,000	Lubricated	-50° to 280°	ABEC-1	00000000	000000
Shielded
20	37	9	40	2	1,400	820	19,000	Lubricated	-50° to 300°	ABEC-1	00000000	00000
25	37	7	40	1.5	960	550	18,000	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	37mm	9mm	1,400	820	Not Rated	Not Rated	Not Rated	Not Rated	23,000	Lubricated	-50° to 130°	ABEC-1	00000000	000000
25mm	37mm	7mm	960	650	Not Rated	Not Rated	Not Rated	Not Rated	21,000	Lubricated	-50° to 130°	ABEC-1	00000000	00000
30mm	37mm	4mm	250	210	Not Rated	Not Rated	Not Rated	Not Rated	7,000	Lubricated	-50° to 130°	ABEC-1	00000000	00000
Shielded
20mm	37mm	9mm	1,400	820	Not Rated	Not Rated	Not Rated	Not Rated	21,000	Lubricated	-40° to 150°	ABEC-1	00000000	00000
440 Stainless Steel Ring
Open
30mm	37mm	4mm	250	210	Not Rated	Not Rated	Not Rated	Not Rated	7,000	Lubricated	-50° to 130°	ABEC-1	00000000	00000
Shielded
25mm	37mm	7mm	960	650	Not Rated	Not Rated	Not Rated	Not Rated	18,000	Lubricated	-40° to 150°	ABEC-1	00000000	00000

Angular-Contact Thrust Ball Bearings

Open

Single-row bearings handle thrust loads on one side. For applications with thrust loads on both sides, mount them in pairs.

Open bearings dissipate heat more efficiently than shielded and sealed bearings.

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

					Combined Load Cap., lbs.
Bearing Trade Number	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Contact Angle	Temp. Range, °F	ABEC Rating		Each
Single Row
Open
7301	12	37	12	Steel	2,350	1,100	24,000	Required	40°	-40° to 300°	ABEC-3	0000000	000000

Thrust Ball Bearings

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
20mm	37mm	12mm	Steel	Steel	3,350	5,950	7,500	Required	-40° to 240°	Two Washers	0000000	000000

Combination Ball/Needle-Roller Bearings

A built-in thrust ball bearing reduces wear from adjacent shaft components, while the needle rollers support high radial loads. Install anywhere you would use separate bearings for radial and thrust loads.

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

						Radial Load Cap., lbs.		Thrust Load Cap., lbs.
For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Ball Bearing OD, mm	Ball Bearing Wd., mm	Ring Material	Dynamic	Static	Dynamic	Static	Max. Speed, rpm	Lubrication	For Shaft Surface Smoothness (Ra), microinch	Temp. Range, °F		Each
Open
25	37	30	43	11	Steel	4,250	6,700	4,050	6,670	6,300	Required	8	-20° to 230°	00000000	0000000

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
30mm	37mm	12mm	Steel	2,700	4,100	8,600	Required	8	-40° to 280°	DIN 618, ISO 3245	00000000	000000
30mm	37mm	16mm	Steel	3,850	6,500	8,600	Required	8	-20° to 280°	DIN 618, ISO 3245	00000000	00000
30mm	37mm	20mm	Steel	4,900	8,850	8,600	Required	8	-20° to 280°	DIN 618, ISO 3245	00000000	00000
30mm	37mm	26mm	Steel	6,250	12,100	8,600	Required	8	-20° to 280°	DIN 618, ISO 3245	00000000	00000
30mm	37mm	38mm	Steel	8,400	17,750	8,600	Required	8	-20° to 280°	DIN 618, ISO 3245	00000000	00000
Sealed—One Side
30mm	37mm	18mm	Steel	3,850	6,500	5,200	Lubricated	8	0° to 210°	DIN 618	00000000	00000
Sealed—Both Sides
30mm	37mm	16mm	Steel	2,700	4,050	5,200	Lubricated	8	0° to 210°	DIN 618	00000000	00000
30mm	37mm	20mm	Steel	3,850	6,500	5,200	Lubricated	8	0° to 210°	DIN 618	00000000	00000

One-Way Locking Needle-Roller Bearing Clutches

Triple Row

The needles in these bearings roll freely in one direction, but lock to transmit torque when the rotation of the shaft is reversed. Also known as drawn-cup roller clutches. An arrow on the lip indicates the rotational direction that locks the bearings.

Triple-row bearings support radial loads.

Bearings with 301 stainless steel springs handle higher temperatures than bearings with acetal springs.

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	Max. Torque, ft.-lbs.	Lubrication	For Shaft Surface Smoothness (Ra), microinch	Temp. Range, °F		Each
Triple Row
301 Stainless Steel Springs
30mm	37mm	30mm	Steel	2,550	3,350	7,300	70	Required	16	-20° to 250°	0000000	000000

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.

Splines are alloy steel for high strength and wear resistance. They're hardened only on the outside, so they stand up to repeated motion while keeping their center soft enough to absorb stress from shifting loads. Those with a step-down end have a shoulder near the end to stop gears, sprockets, and bearings.

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

Steel Ball Bearings

For Four Splines

												Groove		Mounting Holes
For Spline Dia., mm	For No. of Splines	Overall Lg., mm	Flange OD, mm	Bolt Circle Dia., mm	OD, mm	Dynamic Load Capacity, lbs.	Static Load Capacity, lbs.	Max. Dynamic Torque, in.-lbs.	Max. Static Torque, in.-lbs.	Max. Temperature, ° F	With Retaining Ring Grooves	Wd., mm	Dia., mm	No. of	Thread Size		Each
23	4	70	60	47	37	2,750	3,600	1,433	2,115	176°	Yes	3.5	36.1	4	M5 × 0.8 mm	00000000	0000000

Steel Splines

Splined End × Step-Down End

Four Splines

					Step
Dia., mm	No. of Splines	Lg., mm	Spline Lg., mm	Root Dia., mm	Dia., mm	Lg., mm	Material		Each
Splined End × Step-Down End
23	4	350	200	20.6	20	150	52100 Alloy Steel	00000000	0000000