The Newport 850G is a motorized linear actuator for precision positioning in optics, photonics, microscopy, and industrial automation. It delivers 2 inches (50.8 mm) of travel with sub-micron repeatability and is fully compatible with Newport’s ESP electronic servo platform controllers. Its compact side-by-side motor and leadscrew configuration minimizes cantilever loads while enabling direct replacement of manual micrometers in existing translation stages.
Technical Specifications
Travel & Motion
• Travel range: Up to 2 inches (50.8 mm); adjustable limits from <1 mm to 50 mm maximum
• Precision-rolled stainless steel leadscrew: 0.8 mm pitch
• Non-rotating plunger tip
• Backlash: Approximately 15 µm (maximum <20 µm before controller compensation)
• Bi-directional repeatability: ±1.0 µm with controller compensation; limit switches repeatable to ~40 µm
• Accuracy: 25 pounds (11 kg); 18 pounds (8 kg) continuous rated
• Load capacity: Up to 8 kg (low-speed version)
Motor & Control
• Low inertia DC motor with ironless rotor for fast response
• Integral 3.5 m cable; adapter cable (P/N 21731-01) required per actuator
• Manual actuation knob for coarse adjustment without power
• Electro-mechanical limit switches (adjustable, movable)
• Mean Time Between Failures: 2,000 hours
• CE certified
– Key Features
• Compact design reduces structural deflection and loading
• Encoder-based closed-loop positioning for repeatable accuracy
• Vacuum-compatible versions available (850GV6 with Teflon cable, unanodized aluminum, modified fasteners)
• Quick manual override capability
• Adjustable travel limits prevent over-travel damage
– Typical Applications
Optical alignment, sample positioning, microscopy stage automation, photonics beam steering, precision industrial automation.
– Compatibility & Integration
Fully compatible with Newport ESP electronic servo platform controllers. Direct retrofit for existing Newport translation stages and opto-mechanical components using manual micrometers.
