78mm Housing ID Bearings | McMaster-Carr

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Product Family

System of Measurement

Shaft Diameter

OD

Width

Bearing Seal Type

ID

Bearing Type

Bearing Trade Number

Material

Lubrication

Bearing Construction

For Load Direction

Rotation Speed

Less than 10,000 rpm

Ball Bearing Profile

Cage Material

For Housing ID

0.3124" to 0.3130"

0.3749" to 0.3755"

0.3750" to 0.3755"

0.3755" to 0.3764"

0.3760" to 0.3770"

0.4999" to 0.5005"

0.5000" to 0.5005"

0.5000" to 0.5007"

0.5000" to 0.5010"

0.5006" to 0.5017"

0.6250" to 0.6255"

0.6250" to 0.6257"

0.6256" to 0.6267"

0.8740" to 0.8760"

0.8750" to 0.8755"

0.8750" to 0.8758"

0.8758" to 0.8771"

1.1250" to 1.1255"

1.1250" to 1.1258"

1.1258" to 1.1271"

1.2490" to 1.2510"

1.2500" to 1.2505"

1.2500" to 1.2510"

1.2510" to 1.2525"

1.5615" to 1.5635"

1.5625" to 1.5630"

1.5625" to 1.5635"

1.5635" to 1.5650"

2.0000" to 2.0008"

2.0000" to 2.0010"

2.0000" to 2.0012"

2.0012" to 2.0030"

2.3750" to 2.3760"

2.3750" to 2.3762"

2.3762" to 2.3780"

3.0000" to 3.0010"

3.0000" to 3.0012"

3.0012" to 3.0030"

3.7500" to 3.7510"

7.000 mm to 7.015 mm

8.000 mm to 8.015 mm

10.000 mm to 10.018 mm

12.000 mm to 12.018 mm

12.016 mm to 12.043 mm

15.000 mm to 15.018 mm

16.000 mm to 16.015 mm

16.000 mm to 16.018 mm

16.000 mm to 16.035 mm

16.016 mm to 16.043 mm

17.000 mm to 17.018 mm

19.000 mm to 19.021 mm

21.000 mm to 21.021 mm

22.000 mm to 22.021 mm

22.000 mm to 22.018 mm

22.000 mm to 22.026 mm

22.020 mm to 22.053 mm

23.000 mm to 23.021 mm

24.000 mm to 24.021 mm

26.000 mm to 26.021 mm

26.000 mm to 26.018 mm

26.000 mm to 26.026 mm

26.003 mm to 26.033 mm

26.020 mm to 26.053 mm

28.000 mm to 28.021 mm

32.000 mm to 32.025 mm

32.000 mm to 32.030 mm

32.004 mm to 32.037 mm

32.025 mm to 32.064 mm

35.000 mm to 35.025 mm

40.000 mm to 40.025 mm

40.000 mm to 40.021 mm

40.000 mm to 40.030 mm

40.004 mm to 40.037 mm

40.025 mm to 40.064 mm

45.000 mm to 45.025 mm

47.000 mm to 47.021 mm

47.000 mm to 47.025 mm

47.000 mm to 47.030 mm

47.004 mm to 47.037 mm

47.025 mm to 47.064 mm

52.000 mm to 52.030 mm

60.000 mm to 60.030 mm

62.000 mm to 62.023 mm

62.000 mm to 62.025 mm

62.000 mm to 62.030 mm

62.005 mm to 62.044 mm

75.000 mm to 75.030 mm

90.000 mm to 90.035 mm

Maximum Rotation Speed

Shaft Type

Maximum Temperature

Less than 250° F

Minimum Temperature

-99° F to -1° F

Radial Clearance

0.005 mm to 0.013 mm

REACH

RoHS

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

DFARS Specialty Metals

Export Control Classification Number (ECCN)

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About Ball Bearings

Select bearings by load direction, seal type, capacity, and speed ratings to limit wear and keep your equipment running.

Ball Bearings

Image of Product. Front orientation. Ball Bearings. Ball Bearings, Open.

Open

Image of Product. Front orientation. Ball Bearings. Ball Bearings, Shielded.

Shielded

Smoother than smooth—the balls inside these bearings roll nearly friction-free. You’ll often find them on rapidly rotating parts, from the whirring chuck on a power drill to the spinning shaft on an electric motor.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

ABEC Rating—Bearings with an ABEC rating meet industry tolerance standards established by the Annular Bearing Engineers Committee (ABEC). They're rated on a scale from 1 to 9. The higher the rating, the tighter the tolerance. Bearings rated ABEC 1 or 3 are precise enough for most applications. If your application consistently runs at high speeds or requires high accuracy, consider bearings rated ABEC 5 or higher, since they generate less friction and heat.

							Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Inner Ring Type	Bearing Trade No.		Each
Open







				Steel

				60	78	10	1	2,550	9,400	-50	130	Standard	6812	6656K148	000000


				Shielded







								Steel

								60	78	10	1	2,550	8,000	-40	150	Standard	6812-2Z	6656K236	00000

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