High Load Low Noise Bearings 6804ZZ 20x32x7 Bearing For Machinery
6804ZZ Deep Groove Ball Bearing: Compact, High-Load & Low Noise For Machinery
Product Overview
The 6804ZZ deep groove ball bearing is a key model in the deep groove ball bearing series, playing a core role in numerous mechanical transmission systems. With dimensions of 20mm inner diameter, 32mm outer diameter, and 7mm thickness, it features a compact structure that perfectly fits various devices with limited space, providing solid support for efficient and stable equipment operation.
This bearing serves as an important basic component in industries including industrial automation equipment, precision instruments, small motor manufacturing, medical device research, and office equipment production.
Structural Design
Rolling Elements and Raceways
High-precision steel balls undergo multiple precision grinding processes, featuring extremely low surface roughness and strictly controlled dimensional tolerances. Both inner and outer rings feature carefully designed deep groove raceways optimized for perfect fit with steel balls.
During equipment operation, steel balls roll in raceways with evenly distributed contact areas, efficiently dispersing radial loads while providing axial load-carrying capacity. Multi-point contact ensures smooth force transmission, reducing local wear and ensuring stable, low-noise operation.
Sealing Structure
The "ZZ" designation indicates double-sided metal dust cover sealing. Made from high-quality thin metal sheets through precision stamping, these covers fit closely on both bearing sides, effectively blocking dust, impurities, water vapor, and other foreign objects.
This structure protects pre-filled high-performance grease from loss and deterioration, extending lubrication cycles and service life while reducing equipment maintenance costs.
Performance Characteristics
High-Speed Adaptability
Advanced manufacturing processes and high-quality materials result in an extremely low friction coefficient, enabling stable operation under high-speed conditions. In small high-speed motors, it easily copes with rotor high-speed rotation, generates minimal heat, and reduces equipment failure risks.
Reliable Load-Carrying Capacity
Despite compact size, reasonable structural design and high-strength materials provide excellent radial load-carrying capacity and bidirectional axial load-carrying capacity. In small and medium-sized transmission mechanisms, it stably supports shaft rotation while resisting operational axial forces.
Low Noise and Low Vibration
Precision processing technology achieves high-precision coordination between components. Steel balls follow stable, orderly rolling trajectories in raceways, significantly reducing vibration and noise. Essential for precision instruments requiring quiet operation environments.
Application Fields
- Industrial Automation Equipment: Small transmission devices in automated production lines, drive shaft support for precision conveyors, and small robotic arm joints
- Precision Instrument Industry: Microscopes, laser measuring instruments, small sensors requiring high precision and low noise
- Small Motor Field: Rotor support for small water pump motors, fan motors, and precision instrument drive motors
- Medical Device Field: Portable blood pressure monitors, micro infusion pumps requiring stable operation and low noise
- Office Equipment Scenarios: Transmission components in printers, rotating mechanisms in copiers and other office equipment
Dimensions and Specification Parameters
| Dimension Type |
Value |
| Inner Diameter (d) |
20mm |
| Outer Diameter (D) |
32mm |
| Thickness (B) |
7mm |
Maintenance Points
Lubrication Management
Pre-filled with high-performance grease at factory; no frequent addition needed in normal environments. In harsh conditions (high temperature, high humidity, heavy dust), regularly check grease state. Replace if dry, discolored, or contaminated with appropriate grease type and quantity.
Regular Inspection
Establish regular inspection system for visual checks of dust cover integrity and signs of damage, deformation, or loosening. Monitor vibration and temperature during operation using professional instruments. Stop immediately if abnormal vibration increase or temperature exceeds normal range (typically 10-20℃ above ambient temperature).
Installation Notes
Ensure clean installation environment to prevent foreign object entry. Use appropriate tools and follow correct installation methods to ensure matching accuracy between bearing, shaft, and bearing seat. Avoid impact damage during installation for normal operation and optimal performance.
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