W 61905 R-2Z
W Series Stainless Steel Flanged Bearings
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Part No.
Part No.
W 61905 R-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.046 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.011mm to 0
Width
9 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Flange outer diameter
45 mm
Flange thickness
2 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
1360 lbf
Radial static load rating
1012 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Grease
Radial internal clearance
CN
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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W 61905 R-2Z Bearing Product Overview & Core Advantages
The W 61905 R-2Z is a single row deep groove ball bearing designed for precision applications requiring high reliability and maintenance-free operation. This metric bearing features stainless steel construction throughout and integrated shielded seals, making it ideal for applications demanding corrosion resistance and contamination protection. Its compact flanged design (45 mm outer diameter) facilitates secure mounting and positioning within housings. Engineered to handle primarily radial loads with a dynamic rating of 1360 lbf, it offers a high limiting speed of 17,000 rpm and stable performance across a wide temperature range (-30° to 120 °C).
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W | Designates a stainless steel bearing series, providing excellent corrosion resistance. |
| 61905 | The basic bearing designation. "6" indicates a single row deep groove ball bearing. "1905" specifies the dimensional series (1) and bore diameter (05 x 5 = 25 mm). |
| R | Signifies the bearing has a flange on the outer ring for simplified mounting and axial location. |
| 2Z | Indicates the bearing is shielded on both sides. This provides effective protection against contaminant ingress while minimizing friction, contributing to the high limiting speed. |
W 61905 R-2Z Bearing Structural Features & Performance Benefits
- Corrosion-Resistant Construction: The use of stainless steel for the rings, balls, and cage ensures reliable performance in humid or corrosive environments, enhancing bearing service life.
- Flanged Outer Ring: The integral flange (45 mm OD, 2 mm thick) provides a positive locating surface, simplifying assembly and improving positional accuracy in the housing.
- Shielded Design: The non-contact 2Z shields retain the factory-applied grease and effectively exclude contaminants, making the bearing maintenance-free and suitable for clean or sealed applications.
- Precision & High-Speed Capability: Manufactured to P0 tolerance class with a CN radial internal clearance, this bearing ensures smooth, quiet, and low-vibration operation, supporting its high limiting speed of 17,000 rpm.
- Pre-Lubricated: Filled with a high-quality grease suitable for the specified temperature range, the bearing is ready for immediate use upon installation.
W 61905 R-2Z Bearing Typical Application Areas
This versatile and robust bearing is commonly specified in:
- Food and Beverage Processing Equipment (conveyors, mixers)
- Medical and Laboratory Devices (small pumps, analyzers)
- Low-Torque Precision Mechanisms (optical instruments, encoders)
- Chemical and Pharmaceutical Machinery (where corrosion resistance is critical)
- Various Electric Motors and Small Gearboxes
