MR63 Miniature Ball Bearing (MR Bearing), MR series

The MR63 miniature ball bearing (MR series) has a 3 mm bore, a 6 mm outside diameter and a width of 2 mm. Get it as simplified STEP files.

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

• Also searched as: MR63 bearing
• Model id: bearings-miniature-mr63
• Standard: MR series · size MR63

Files

Part key	Simplified
bearings-miniature-mr63	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Bore diameter		3		3	nominal	L1
D	Outside diameter		6		6	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-MR63.pdf.

The MR63 miniature ball bearing beside the MR74

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

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

The MR63 miniature ball bearing in its other versions

• MR63-2Z Miniature Ball Bearing (MR Bearing), Shielded, MR series: width 2.5 mm.
• MR63-2RS Miniature Ball Bearing (MR Bearing), Sealed, MR series: width 2.5 mm.

Other sizes

• One size larger: MR74 Miniature Ball Bearing (MR Bearing), MR series, 4 mm bore, 7 mm OD, 2 mm wide.

Documents

• CC-BRG-MINI-DS-MR63.pdf: MR63 datasheet: values with levels, sources
• CC-BRG-MINI-SZ-MR63.pdf: MR63 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

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

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