SKF
Single-Line Lubrication Systems
Single-line lubrication systems are the most common automated lubrication architecture, ideal for small to medium-sized machinery and production lines. A central pump delivers grease or oil through a single supply line to multiple injectors, each serving one lubrication point. The injectors are hydraulically actuated; when the pump pressurises the line, each injector discharges a precisely metered volume. When pressure is relieved, the injectors reset. The system is simple to design and expand, monitoring is straightforward (cycle switch on end-of-line), and it is cost-effective for up to several hundred points. Typical applications include packaging machines, textile machinery, woodworking lines, and machine tools. SKF single-line systems provide reliable, adjustable, and verifiable lubrication that ensures every bearing receives its required lubricant dose at each cycle.
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Trusted by Industry Leaders
Simple, Cost-Effective Architecture
One main line, easy to install and extend.
Precise Metering per Point
Adjustable injector output from 0.01 to 1.0 cm³.
Visual or Electronic Monitoring
Cycle indicator pin or proximity switch confirms delivery.
Compact Components
Slim injectors fit confined machine spaces.
Grease and Oil Compatible
Works with NLGI 000 to 2 greases and fluid oils.
Low Total Cost of Ownership
Reliable, minimal maintenance system architecture.
Designing a Single-Line System for a Packaging Machine
A carton erector might have 40 lubrication points on chains, cams, and bearings. A single-line system with a small electric pump and a 40-outlet injector bank provides automatic greasing during machine operation, eliminating manual downtime for lubrication and extending component life in a high-cycle application.
Monitoring and Troubleshooting Single-Line Systems
The end-of-line pressure switch or cycle switch confirms line pressurisation and reset. If a blockage occurs, pressure rises and the pump can signal an alarm. SKF’s monitoring devices can be integrated to provide real-time feedback to the machine’s PLC, ensuring any lubrication failure triggers an immediate response.