Manufactured by CHG Bearing, the MR85 is a precision Metric Miniature Deep Groove Ball Bearings. Key dimensional parameters include a 5 mm bore diameter, a 8 mm outer diameter, and a 2 mm overall width. This component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
MR85 - Metric Miniature Deep Groove Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | MR85 |
| Dimensions | |
| Bore Diameter (d) | 5 mm |
| Width (B) | 2 mm |
| Outer Diameter (D) | 8 mm |
| Open Width B | 2 mm |
| Radius rs min | 0.1 mm |
| Flange Df | 9.2 mm |
| Open Flange Width Bf | 0.6 mm |
| Performance | |
| Dynamic Load Cr (N) | 308 N |
| Static Load C0r (N) | 120 N |
| Grease Speed (x1000 rpm) | 53 x1000 rpm |
| Oil Speed (x1000 rpm) | 63 x1000 rpm |
| Design Configurations | |
| Open Model | MR85 |
| Flanged Open Model | MF85 |
| Shielded Model | - |
| Flanged Shielded Model | - |
| 2RS | - |
| 2RU | - |
| TTS | - |
| Internal Design & Weight | |
| Cage Type | W |
| Ball Qty. Z | 8 |
| Ball Size Dw | 1 mm |
| Open Weight (g) | 0.25 g |
| Flanged Open Weight (g) | 0.33 g |
MR85 8 mm 5 mm 2 mm Frequently Asked Questions about MR85 Metric Miniature Deep Groove Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To safeguard CHG Bearing MR85 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (5 mm x 8 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
As standard production, CHG Bearing subjects MR85 to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
Engineered according to international ISO boundary plans, CHG Bearing supplies MR85 with a precision bore diameter (d) of 5 mm, an outside diameter (D) of 8 mm, and a nominal ring width (B) of 2 mm. This configuration yields an effective cross-sectional wall thickness of 1.5 mm and an envelope ratio (D/d) of 1.6, delivering compact rigidity for OEM machinery housings.
Absolutely. The CHG Bearing MR85 Metric Miniature Deep Groove Ball Bearings is a 1:1 direct interchange for renowned brands, matching part numbers: SKF MR85, FAG MR85, NSK MR85. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
