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Home Product W 638/2-2Z Miniature Deep Groove Ball Bearing Double Sealed for Small Motors, Instruments
W 638/2-2Z(OD2,ID5)

W 638/2-2Z Miniature Deep Groove Ball Bearing Double Sealed for Small Motors, Instruments

W638/2-2Z Bearing
2Z Shielded Ball Bearing
Miniature Deep Groove Bearing
W 638/2-2Z
W638/2-2Z Bearing: 2Z shielded miniature deep groove ball bearing designed for compact, high-speed applications with dual dust-resistant shields.
Categories:Power Transmission
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Product Description

The W638/2-2Z Bearing is a high-precision 2Z shielded ball bearing designed for compact machinery and equipment. As a miniature deep groove ball bearing, it features dual metal shields (2Z) to protect against dust and contaminants while retaining grease. Its compact dimensions, including an inner diameter of 8 mm, outer diameter of 19 mm, and width of 6 mm, make it ideal for applications with strict space limitations. Operating within a temperature range of -20°C to +120°C, this bearing supports high-speed rotation (up to 30,000 rpm) and is commonly used in precision instruments, micro-motors, medical devices, and robotics. Advantages include low friction, quiet operation, and extended service life due to hardened steel construction. However, its miniature design limits axial load capacity compared to larger bearings. The shielded design balances protection with minimal torque resistance, ensuring reliable performance in environments requiring contamination resistance without full sealing.
Here's the HTML table format for the product parameters:
Parameter Specification
Bearing Model W638/2-2Z
Bearing Type Deep Groove Ball Bearing
Shielding Type 2Z (Double Shielded)
Inner Diameter 2 mm
Outer Diameter 5 mm
Width 2.3 mm
Material Chrome Steel (Gcr15)
Dynamic Load Rating 75 N
Static Load Rating 28 N
Limiting Speed 43,000 rpm
Application Industries Small Motors, Instrumentation, Precision Equipment
Lubrication Grease or Oil
Operating Temperature -30°C to +110°C
Weight 0.25 g
Mounting Recommendation Press-fit installation with proper tools
Standards Compliance ISO 9001:2015, ABEC-1
question:How is after-sales service handled if a malfunction occurs during use and the product is found to be refurbished?
answer:Support terminates immediately; legal action may follow. Purchase genuine products for full service.
question:Do you provide technical selection services?
answer:Yes, our team offers tailored technical guidance to meet your specific requirements.
question:What is the process for returns or replacements of defective products?
answer:Submit a claim with proof; replacements shipped after verification. Refunds processed within 7 days.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
question:How is after-sales service handled if a malfunction occurs during use and the product is found to be refurbished?
answer:Support terminates immediately; legal action may follow. Purchase genuine products for full service.
question:Do you provide technical selection services?
answer:Yes, our team offers tailored technical guidance to meet your specific requirements.
question:What is the process for returns or replacements of defective products?
answer:Submit a claim with proof; replacements shipped after verification. Refunds processed within 7 days.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
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