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Rail Joiner for 34 mm Rails
Metric ID Mark
XT34J Mounted on
The XT34J(/M) Rail Joiner adapts two standard 34 mm rails together at their ends, allowing the construction of long rail sections from smaller segments of rail. Eight M3 cap screws are provided with the rail joiner, which can be threaded into the tapped holes on the rail ends with a 2.5 mm balldriver (not included). To maintain a straight edge along both the X and Y axes, Thorlabs recommends that the rails are held against a hard corner while the rail joiner is tightened.
The Ø25 mm bore can be used as a beam path in conjunction with our XT34-to-SM1 adapter. Though this aperture is slightly smaller than the Ø29 mm bore of a standard 34 mm rail, it is nearly the same as that of a Ø1" lens tube.
Please note that when the rail joiner is installed, the dovetail profile along the side of the 34 mm rail is interrupted, which prevents dovetail components from being clamped to that section of the rail.
Thorlabs offers a wide and growing complement of accessories for 34 mm rails, including clamps and angle brackets, breadboard mounts, rail carriers, mounting platforms, lens tube adapters, and rail joiners. Together with size adapters that incorporate 66 mm and 95 mm rails into an XT34 setup, these tools provide a complete family of rigid, versatile building blocks suited for virtually any optomechanical setup.