MR74 Miniature Ball Bearing (MR Bearing), MR series

For a 4 mm shaft and a 7 mm housing bore, the MR74 miniature ball bearing (MR series) is 2 mm wide. Modeled as simplified STEP files.

How these parts are made, and what the levels mean: read the method

• Also searched as: MR74 bearing
• Model id: bearings-miniature-mr74
• Standard: MR series · size MR74

Files

Part key	Simplified
bearings-miniature-mr74	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Bore diameter		4		4	nominal	L1
D	Outside diameter		7		7	nominal	L1
B	Width		2		2	nominal	L1
r	Chamfer dimension	0.08			0.08	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-BRG-MINI-SZ-MR74.pdf.

The MR74 miniature ball bearing beside the MR63 and the MR84

The MR74 is number 2, counting from the smallest, of the 12 MR series miniature ball bearings published here, from MR63 to MR148.

• Bore diameter (d): 4 mm on the MR74 miniature ball bearing, against 3 mm on the MR63 and 4 mm on the MR84.
• Outside diameter (D): 7 mm on the MR74 miniature ball bearing, against 6 mm on the MR63 and 8 mm on the MR84.
• Width (B): 2 mm on the MR74 miniature ball bearing, the same on the MR63 and the MR84.
• Chamfer dimension (r): at least 0.08 mm on the MR74 miniature ball bearing, against at least 0.08 mm on the MR63 and at least 0.1 mm on the MR84.

The MR74 miniature ball bearing in its other versions

• MR74-2Z Miniature Ball Bearing (MR Bearing), Shielded, MR series: width 2.5 mm.
• MR74-2RS Miniature Ball Bearing (MR Bearing), Sealed, MR series: width 2.5 mm.

Other sizes

• One size smaller: MR63 Miniature Ball Bearing (MR Bearing), MR series, 3 mm bore, 6 mm OD, 2 mm wide.
• One size larger: MR84 Miniature Ball Bearing (MR Bearing), MR series, 4 mm bore, 8 mm OD, 2 mm wide.

Documents

• CC-BRG-MINI-DS-MR74.pdf: MR74 datasheet: values with levels, sources
• CC-BRG-MINI-SZ-MR74.pdf: MR74 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

nmb-miniature, nsk-miniature. Full citations: the method page and this size's datasheet.

Found an error? Use the feedback section on this page.