Lubricant for Conveyor Chains
Lubricant selection for conveyor system chains including accumulating conveyors, overhead conveyors, and heavy-duty material handling chains.
Conveyor chains operate under different conditions than power transmission chains—typically slower speeds but longer continuous operation with varied environmental exposure. Lubricant selection depends heavily on the specific conveyor application.
Application Categories
Accumulating Conveyors
Chains under constant load with frequent starts/stops require lubricants with good boundary lubrication properties and wear protection.
Overhead Conveyors
Critical requirement: non-drip lubricants that stay on the chain without contaminating products below. Grease or high-viscosity tackified oils are common.
Oven Conveyors
High-temperature synthetic lubricants required. Standard mineral oils oxidize rapidly above 120°C.
Washdown Environments
Water-resistant lubricants needed. Consider NSF H1 products if food contact is possible.
Temperature Considerations
| Temperature Range | Lubricant Type |
|---|---|
| -30°C to +40°C | Mineral oil with pour point depressant |
| +40°C to +120°C | Mineral oil or PAO synthetic |
| +120°C to +200°C | PAO or ester synthetic |
| +200°C to +300°C | PFPE synthetic |
Automatic Lubrication
Many conveyor systems use automatic lubrication to ensure consistent application. System types include:
- Single-point lubricators on critical joints
- Centralized systems with programmable delivery
- Brush or felt applicators at fixed points
Chain Elongation Monitoring
Proper lubrication directly affects chain elongation (wear). Monitor chain length and correlate with lubrication practices to optimize intervals.
Operating Conditions
| Operating Parameter | Typical Range/Value |
|---|---|
| Operating Speed | Typically <100 ft/min (slow compared to drive chains) |
| Operating Temperature | Ambient to +200°C for oven conveyors |
| Chain Types | Accumulating, overhead trolley, drag, apron |
| Environment | May include dust, moisture, product contamination |
| Load | Continuous loads, often with impact from product loading |
Required Lubricant Properties
| Required Property | Specification |
|---|---|
| Viscosity | ISO VG 150-680 depending on temperature and environment |
| Penetration | Must reach wearing surfaces |
| Drip Resistance | Critical where product contamination is a concern |
| Temperature Range | Must cover operating range including warm-up |
| Oxidation Stability | Important for high-temperature applications |
| Cleanliness | May need to resist dust accumulation |
Compatibility Warnings
- -Oven conveyor chains require high-temperature synthetic lubricants
- -Food conveyors require NSF H1 lubricants in incidental contact zones
- -Overhead conveyors must use non-drip lubricants to prevent product contamination
Availability
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Sources
- Rexnord Conveyor Chain Engineering Manual
- Webster Industries Chain Lubrication Guide
- ISO 606 - Short-pitch transmission precision roller chains
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