The ST491B Disk Harrow Unit is a heavy-duty agricultural bearing designed for disc harrows and soil preparation equipment operating in harsh environments.
It is engineered as a direct replacement for FD209RB bearing failures, offering superior sealing, durability, and contamination resistance.
Why Standard FD209RB Bearings Fail
- Seal failure leading to contamination ingress
- Poor lubrication retention
- Heavy shock loads from field operation
- Corrosion from fertilizer exposure
ST491B Engineering Solution
- Triple lip sealing system for superior contamination protection
- Pre-lubricated factory grease for immediate use
- Reinforced pressed steel housing for heavy-duty operation
- Optimized corrosion resistance for fertilizer environments
Key Features Of ST491B Disk Harrow Unit
1.Triple Lip Sealing Protection
One-piece shroud cover with three molded contact seals prevents dust, mud, moisture, and chemicals from entering the bearing system.
2.Heavy-Duty Housing
Pressed steel square housing ensures high load capacity and impact resistance.
3.Round Bore Design
Compatible with standard agricultural shafts for easy installation.
4.Pre-Greased System
Factory-filled grease ensures consistent lubrication and reduced maintenance needs.
5.Corrosion Resistance
Designed for fertilizer, moisture, and harsh soil environments.
ST491B vs Standard FD209RB
| Feature | ST491B Disk Harrow Unit | Standard FD209RB |
|---|---|---|
| Seal Type | Triple Lip Seal | Standard Seal |
| Contamination Protection | High | Medium |
| Service Life | Extended | Standard |
| Maintenance | Low | Frequent |
Technical Specifications
| Product Name | ST491B Disk Harrow Unit |
| Bore Type | Round Bore |
| Housing | Pressed Steel Square Housing |
| Seal Type | Triple Lip Seal |
| Lubrication | Pre-Greased |
| Application | Disc Harrows / Soil Equipment |
| Environment | Dust, Mud, Fertilizer |
Cross Reference Replacement
ST491B replaces:
- FD209RB
- DHU1-1/2R-209
- ST3027
- 238813B
- 822-208C
Applications Of ST491B Disk Harrow Unit
- Disc Harrows
- Soil Tillage Equipment
- Field Cultivators
- Rolling Harrows
- Agricultural Machinery
Supply & Quality Assurance
- Stable bulk production capacity
- Strict quality inspection system
- OEM / ODM customization available
- Export to Europe & North America
