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The W 638/4-2Z is a compact stainless steel deep groove ball bearing, measuring just 4mm by 9mm by 4mm. Its shielded design keeps out dust while allowing smooth rotation at speeds up to 70,000 RPM.
Made entirely from stainless steel, it resists corrosion and handles radial loads up to 82 lbf. The pre-greased design means it’s ready to use straight away, with a temperature range from -30°C to 120°C.
This single row bearing is interchangeable with SKF models, making replacements easy. Its small size makes it ideal for precision instruments, small motors or medical devices where space is limited.
Weighing under 1 gram, it’s lightweight yet durable. Compliant with RoHS and REACH standards for safe use in various applications.
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Why Choose W 638/4-2Z Bearing for Precision Tasks?
W 638/4-2Z Bearing is crafted with stainless steel rings and balls, offering excellent corrosion resistance and durability.
Its shielded design protects against contaminants, ensuring smooth operation in various environments.
With a dynamic radial load capacity of 82 lbf, it handles precise radial loads efficiently.
The high-speed capability of 70,000 rpm makes it suitable for demanding applications.
W 638/4-2Z Bearing’s compact size of 4 mm×9 mm×4 mm allows for easy integration into small spaces.
Its grease lubrication ensures long-lasting performance with minimal maintenance.
Common Applications of W 638/4-2Z Bearing
W 638/4-2Z Bearing is widely used in small electric motors, such as those found in cooling fans or miniature appliances, due to its compact size and reliable performance. The shielded design helps keep contaminants out, extending its lifespan in everyday use.
In medical devices like dental handpieces or lab equipment, W 638/4-2Z Bearing offers smooth operation with minimal maintenance. Its stainless steel construction ensures compatibility with sterilisation processes.
For precision instruments such as optical encoders or small gauges, W 638/4-2Z Bearing provides consistent radial support. The grease lubrication allows for quiet operation, essential in sensitive environments.
Automation systems often incorporate W 638/4-2Z Bearing in compact robotic joints or conveyor guides. Its metric sizing makes it easy to integrate into various European-designed machinery.
In consumer electronics like printers or small power tools, W 638/4-2Z Bearing handles moderate loads while maintaining energy efficiency. The P0 tolerance class ensures reliable performance across different operating conditions.
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