MR104 Miniature Ball Bearing (MR Bearing), MR series

For a 4 mm shaft and a 10 mm housing bore, the MR104 miniature ball bearing (MR series) is 3 mm wide. Modeled as simplified STEP files.

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

• Also searched as: MR104 bearing
• Model id: bearings-miniature-mr104
• Standard: MR series · size MR104

Files

Part key	Simplified
bearings-miniature-mr104	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Bore diameter		4		4	nominal	L1
D	Outside diameter		10		10	nominal	L1
B	Width		3		3	nominal	L1
r	Chamfer dimension	0.15			0.15	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-BRG-MINI-SZ-MR104.pdf.

The MR104 miniature ball bearing beside the MR84 and the MR85

The MR104 is number 4, 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 MR104 miniature ball bearing, against 4 mm on the MR84 and 5 mm on the MR85.
• Outside diameter (D): 10 mm on the MR104 miniature ball bearing, against 8 mm on the MR84 and 8 mm on the MR85.
• Width (B): 3 mm on the MR104 miniature ball bearing, against 2 mm on the MR84 and 2 mm on the MR85.
• Chamfer dimension (r): at least 0.15 mm on the MR104 miniature ball bearing, against at least 0.1 mm on the MR84 and at least 0.08 mm on the MR85.

The MR104 miniature ball bearing in its other versions

• MR104-2Z Miniature Ball Bearing (MR Bearing), Shielded, MR series: width 4 mm.
• MR104-2RS Miniature Ball Bearing (MR Bearing), Sealed, MR series: width 4 mm.

Other sizes

• One size smaller: MR84 Miniature Ball Bearing (MR Bearing), MR series, 4 mm bore, 8 mm OD, 2 mm wide.
• One size larger: MR85 Miniature Ball Bearing (MR Bearing), MR series, 5 mm bore, 8 mm OD, 2 mm wide.

Documents

• CC-BRG-MINI-DS-MR104.pdf: MR104 datasheet: values with levels, sources
• CC-BRG-MINI-SZ-MR104.pdf: MR104 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.

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