MR137 Miniature Ball Bearing (MR Bearing), MR series

For a 7 mm shaft and a 13 mm housing bore, the MR137 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: MR137 bearing
• Model id: bearings-miniature-mr137
• Standard: MR series · size MR137

Files

Part key	Simplified
bearings-miniature-mr137	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Bore diameter		7		7	nominal	L1
D	Outside diameter		13		13	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-MR137.pdf.

The MR137 miniature ball bearing beside the MR117 and the MR128

The MR137 is number 10, counting from the smallest, of the 12 MR series miniature ball bearings published here, from MR63 to MR148.

• Bore diameter (d): 7 mm on the MR137 miniature ball bearing, against 7 mm on the MR117 and 8 mm on the MR128.
• Outside diameter (D): 13 mm on the MR137 miniature ball bearing, against 11 mm on the MR117 and 12 mm on the MR128.
• Width (B): 3 mm on the MR137 miniature ball bearing, against 2.5 mm on the MR117 and 2.5 mm on the MR128.
• Chamfer dimension (r): at least 0.15 mm on the MR137 miniature ball bearing, against at least 0.1 mm on the MR117 and at least 0.1 mm on the MR128.

The MR137 miniature ball bearing in its other versions

• MR137-2Z Miniature Ball Bearing (MR Bearing), Shielded, MR series: width 4 mm.
• MR137-2RS Miniature Ball Bearing (MR Bearing), Sealed, MR series: width 4 mm.

Other sizes

• One size smaller: MR117 Miniature Ball Bearing (MR Bearing), MR series, 7 mm bore, 11 mm OD, 2.5 mm wide.
• One size larger: MR128 Miniature Ball Bearing (MR Bearing), MR series, 8 mm bore, 12 mm OD, 2.5 mm wide.

Documents

• CC-BRG-MINI-DS-MR137.pdf: MR137 datasheet: values with levels, sources
• CC-BRG-MINI-SZ-MR137.pdf: MR137 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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