The heavy duty tunnel access push-pull linear motion feedthrough from MDC enables linear displacement of heavy in-vacuum components while also allowing instrumentation leads—such as thermocouples or low-voltage wiring—to pass through the hollow actuator shaft.

Each unit features a removable 1-1/3" (33.8 mm) MDC CF mini flange on the vacuum nose piece, which can be blanked, modified, or fitted with electrical feedthroughs as needed. Though the system provides no position readout, the integral position lock ensures samples remain securely held once manually adjusted.

These feedthroughs are built with reentrant welded bellows and larger diameter shafts to manage heavier mechanical loads. Available with 2", 4", or 6" (50.8, 101.6, or 152.4 mm) travel, they mount using industry-standard 2-3/4" Conflat® CF flanges for seamless integration in UHV environments.

Industry Applications

Ideal for vacuum systems requiring both mechanical and electrical access, these feedthroughs are commonly used in thermal analysis, sample heating experiments, cryogenics, and sensor-equipped manipulations. Their hollow shaft design allows simultaneous positioning and data acquisition, making them essential in materials science, plasma research, and semiconductor development.