MF85 2rs
MF Series Flanged Miniature Bearings
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Part No.
Part No.
MF85 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.42 g
Tolerance class
ABEC1
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
8 mm
Outside diameter tolerance
-0.008mm to 0
Width
2.5 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
9.2 mm
Flange thickness
0.6 mm
Ball & Washer Dimensions
Ball diameter
0.8 mm
Ball quantity
9
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
42 lbf
Radial static load rating
16 lbf
Limiting speed
53 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.002mm to 0.013mm
Radial internal clearance
MC3
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Shield material
Nitrile Rubber
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.32
/ each
In Stock
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MF85 2rs Bearing Product Overview & Core Advantages
The MF85 2RS is a metric miniature deep groove ball bearing designed for compact applications requiring reliable performance. Featuring a single row construction with integral rubber seals (2RS) on both sides, this bearing provides effective protection against contaminants while retaining lubrication. Its primary advantage lies in handling radial loads efficiently within a constrained space envelope, making it ideal for precision instruments and small mechanisms. Manufactured with chrome steel rings and balls and a stainless steel cage, it offers durability and consistent operation across a temperature range of -30°C to 110°C.
MF85 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| MF85 | Basic bearing designation indicating a specific miniature series with a 5mm bore and 8mm outside diameter. |
| 2RS | Bearing is equipped with contact rubber seals on both sides, providing superior protection against dust and moisture, and retaining lubricant effectively for extended service life. |
MF85 2rs Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With dimensions of 5mm (bore) x 8mm (OD) x 2.5mm (width) and a weight of just 0.42g, this bearing is engineered for space-critical applications.
- Robust Sealing: The Nitrile rubber (2RS) seals ensure the bearing is protected from particulate contamination and fluid ingress, making it suitable for environments where cleanliness is a factor.
- Stable Cage Performance: The stainless steel cage provides excellent guidance for the 9 precision chrome steel balls, contributing to smooth operation and reduced wear.
- Precision & Reliability: Manufactured to ABEC1 tolerance class with a controlled radial internal clearance (MC3 group), the bearing delivers consistent performance and low noise levels.
- High-Speed Capability: The optimized design and material selection support a limiting speed of 53,000 rpm, suitable for high-speed miniature spindles and drives.
MF85 2rs Bearing Typical Application Areas
- Small Precision Motors: Used in DC motors, stepper motors, and coreless motors requiring reliable support at high rotational speeds.
- Medical & Dental Handpieces: Ideal for high-speed drills and surgical tools where compact size, low noise, and contamination resistance are critical.
- Office Automation Equipment: Found in scanners, printers, and small fans, providing smooth and quiet rotational motion.
- Instrumentation & Gauges: Supports rotating components in precision measuring devices and optical instruments.
- Small Robotics & Drones: Used in joint actuators, gimbal systems, and miniature gearboxes where light weight and high reliability are essential.
