Overview
The Quicksilver Controls QCI-A34HC-4 is a NEMA 34 I-Grade servo motor featuring integrated encoder feedback for closed-loop motion control. This high-torque motor combines direct-drive capability with precision encoder output, making it suitable for industrial automation, robotics, packaging, and other motion control systems. The motor is part of Quicksilver’s proven A34HC series, offering exceptional performance in demanding applications.
Key Features
- NEMA 34 frame size with integrated 16,000 counts/revolution encoder
- High continuous torque output of 2550 oz-in (18.0 Nm) for sustained operations
- Peak torque of 3250 oz-in (22.95 Nm) for acceleration and dynamic load handling
- Maximum speed of 1500 RPM, optimized for high-torque, low-speed applications
- Single integrated motor interface cable for encoder feedback and power delivery
- Designed for QuickSilver servo controllers (N-series and D2-series compatible)
Technical Specifications
Motor Performance: Continuous torque reaches 2550 oz-in with peak torque of 3250 oz-in. Maximum rated current is 14.5 A, and the motor delivers rated performance up to 1500 RPM maximum speed. The integrated encoder provides 16,000 counts per revolution of feedback resolution for precise position and velocity control.
Typical Applications
- Precision positioning in automated machinery and indexing tables
- Direct-drive applications requiring high holding torque and low backlash
- Robotics and articulated arm joint actuation
- Packaging machinery, converting equipment, and material handling systems
- Test and measurement equipment requiring closed-loop feedback control
- Machine tool feed drives and spindle positioning systems
Compatibility & Replacements
Compatible With
- QuickSilver N3-IX servo controller
- QuickSilver N2-IX servo controller
- QuickSilver D2-series servo controllers
- Systems requiring NEMA 34 direct-drive servo motors with integrated encoder feedback
- Custom motion control platforms using 14-pin round encoder connectors and 6-pin round power connectors
Replaces / Drop-In Replacement For
The QCI-A34HC-4 is the highest-torque variant in the A34HC series. Direct replacements include other A34HC series motors with matching mechanical and electrical interfaces. Verify connector pinout compatibility with your existing system before substituting other NEMA 34 I-Grade models.
Works With
- QuickSilver motion control software and tuning tools
- Integrated encoder feedback for closed-loop servo control
- RS-485/USB network communication via compatible QuickSilver controllers
- Standard DB15HD motor interface connectors and encoder signal protocols








