MR85-2Z Miniature Ball Bearing (MR Bearing), Shielded, MR series

The MR85-2Z miniature ball bearing (MR series, shielded) has a 5 mm bore, an 8 mm outside diameter and a width of 2.5 mm. Get it as simplified STEP files.

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

• Also searched as: MR85-2Z bearing
• Model id: bearings-miniature-mr85-2z
• Standard: MR series · size MR85

Files

Part key	Simplified
bearings-miniature-mr85-2z	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Bore diameter		5		5	nominal	L1
D	Outside diameter		8		8	nominal	L1
B	Width		2.5		2.5	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-MR85.pdf.

The MR85-2Z miniature ball bearing beside the MR104-2Z and the MR95-2Z

The MR85-2Z is number 5, counting from the smallest, of the 13 MR series miniature ball bearings published here, from MR63-2Z to MR148-2Z.

• Bore diameter (d): 5 mm on the MR85-2Z miniature ball bearing, against 4 mm on the MR104-2Z and 5 mm on the MR95-2Z.
• Outside diameter (D): 8 mm on the MR85-2Z miniature ball bearing, against 10 mm on the MR104-2Z and 9 mm on the MR95-2Z.
• Width (B): 2.5 mm on the MR85-2Z miniature ball bearing, against 4 mm on the MR104-2Z and 3 mm on the MR95-2Z.
• Chamfer dimension (r): at least 0.08 mm on the MR85-2Z miniature ball bearing, against at least 0.15 mm on the MR104-2Z and at least 0.1 mm on the MR95-2Z.

The MR85-2Z miniature ball bearing in its other versions

• MR85 Miniature Ball Bearing (MR Bearing), MR series: width 2 mm.
• MR85-2RS Miniature Ball Bearing (MR Bearing), Sealed, MR series, with the same values.

Other sizes

• One size smaller: MR104-2Z Miniature Ball Bearing (MR Bearing), Shielded, MR series, 4 mm bore, 10 mm OD, 4 mm wide.
• One size larger: MR95-2Z Miniature Ball Bearing (MR Bearing), Shielded, MR series, 5 mm bore, 9 mm OD, 3 mm wide.

Documents

• CC-BRG-MINI-DS-MR85.pdf: MR85 datasheet: values with levels, sources
• CC-BRG-MINI-SZ-MR85.pdf: MR85 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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