W 61704-2ZS
W Series Stainless Steel Bearings
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Part No.
Part No.
W 61704-2ZS
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0056 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
27 mm
Outside diameter tolerance
-0.009mm to 0
Width
4 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
132 lbf
Radial static load rating
88 lbf
Limiting speed
26 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 61704-2ZS Bearing Product Overview & Core Advantages
The W 61704-2ZS is a precision miniature ball bearing designed for applications demanding compact size and reliable performance. As a single row deep groove ball bearing, it is optimized to carry primarily radial loads and is constructed entirely from stainless steel for enhanced corrosion resistance. Its key advantages include a shielded design for contaminant protection, pre-lubrication for immediate operation, and a compact cross-section ideal for space-constrained assemblies. This bearing offers a robust solution for high-speed, low-torque applications requiring long-term reliability.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W | Manufacturer's series prefix for stainless steel miniature bearings. |
| 61704 | The bearing series number, defining the bearing dimensions (20mm bore, 27mm OD, 4mm width). |
| 2Z | Indicates the bearing is fitted with shields on both sides. This provides effective protection against contamination while allowing for higher limiting speeds compared to contact seals. |
| S | Specifies that the bearing rings and balls are made of stainless steel. |
W 61704-2ZS Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With a width of only 4 mm and a weight of just 0.0056 kg, this bearing is engineered for applications where space and weight are critical constraints.
- Corrosion Resistance: The all-stainless steel construction (rings, balls, and cage) ensures excellent resistance to rust and corrosion, making it suitable for use in harsh environments and washdown applications.
- Contaminant Protection: The non-contact 2Z shields on both sides protect the internal bearing components from dust and debris, enhancing service life and reliability without significantly increasing rotational torque.
- Ready-to-Use Lubrication: The bearing is pre-lubricated with grease, enabling immediate installation and operation. This contributes to its maintenance-free characteristics in many applications.
- Precision & Speed: Manufactured to P0 tolerance class with a standard CN radial internal clearance, it provides consistent performance and is capable of operating at a limiting speed of 26,000 rpm.
W 61704-2ZS Bearing Typical Application Areas
- Precision Instruments: Optical encoders, measuring devices, and laboratory equipment.
- Small Motors & Gearboxes: Stepper motors, miniature DC motors, and precision gearheads.
- Office Automation & IT Equipment: Printers, scanners, and computer cooling fans.
- Medical Devices: Dental handpieces, small pumps, and diagnostic equipment.
- Robotics & Automation: Small joint actuators, conveyor rollers, and guidance systems.
