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Home Product 3x8x3 Precision Needle Roller Bearing - High-Speed for Robotics & Medical Devices
3*8*3 (precision level)

3x8x3 Precision Needle Roller Bearing - High-Speed for Robotics & Medical Devices

3x8x3 precision bearing
3x8x3 high tolerance bearing
3x8x3 precision rated component
3*8*3 (precision level)
3x8x3 precision bearing engineered for high tolerance applications, serving as a precision-rated component in mechanical systems or instruments requiring strict tolerances and reliable performance.
Categories:Power Transmission
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Product Description

The 3x8x3 precision bearing is a high-tolerance component engineered for critical applications demanding exceptional dimensional accuracy and operational stability. With a compact 3mm inner diameter, 8mm outer diameter, and 3mm width, this precision-rated component features chromium steel construction and polyamide cage for optimized load distribution, supporting radial forces up to 890N and axial loads to 440N. Designed for direct integration in micromotors, optical encoders, and precision instrumentation, it operates within -30°C to +120°C with minimal torque variation (±3%). The 3x8x3 high tolerance bearing achieves ABEC-5 equivalent standards, demonstrating axial runout below 0.008mm while maintaining grease-retention integrity through multiple sealing configurations. Its principal advantages include extended service life exceeding 10,000 hours at 8,000 RPM, though requires controlled mounting conditions to preserve micron-level tolerances. Typical applications span medical imaging systems, aerospace actuators, and semiconductor manufacturing equipment where sub-micron positional accuracy is paramount.
Parameter Specification
Model Designation 3x8x3 Precision Bearing
Inner Diameter (ID) 3 mm ±0.0025
Outer Diameter (OD) 8 mm ±0.005
Width 3 mm ±0.1
Radial Clearance C2/Micro (2-6 μm)
Dynamic Load Rating 1200 N
Static Load Rating 450 N
Material Chrome Steel AISI 52100
Accuracy Grade ABEC-7 / ISO P5
Tolerance Class High Tolerance Bearing (JIS Class 0)
Operating Temperature -30°C to +120°C
Lubrication Grease-filled (ISO VG 10)
Sealing Non-contact RS Seal
Vibration Level Z1 (≤15 μm/s)
Application Scope Precision-rated components for micro-motors, instrumentation
question:What payment methods do you accept?
answer:We support TT, Paypal, and other mainstream payment methods.
question:Do you have a professional product selection engineering team?
answer:Yes, our expert team ensures optimal product sourcing and quality control.
question:Can I self-book official couriers to pick up goods?
answer:Yes, you can schedule courier pickups via our logistics platform.
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:What payment methods do you accept?
answer:We support TT, Paypal, and other mainstream payment methods.
question:Do you have a professional product selection engineering team?
answer:Yes, our expert team ensures optimal product sourcing and quality control.
question:Can I self-book official couriers to pick up goods?
answer:Yes, you can schedule courier pickups via our logistics platform.
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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