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95 mm Optical Construction Rails
Side-Located T-Slots Accept
95 mm Rail End Plate
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95 mm Optical Rails with XT95EC1 End Plates (Sold Separately)
Thorlabs' XT95 Optical Rails are our largest and most rigid construction rails. They consist of extruded lengths of aluminum, and each rail side features a linear mounting surface with two T-slots and two outer wings that span the rail length. Their precision construction allows large-scale optical assemblies to be translated along the rail axis with excellent mechanical stability. Originally designed for vacuum-tight flight paths, these optical rails are ideal building blocks for three-dimensional, load bearing structures; large-scale optical instrumentation setups; or modular, expandable assemblies that require the highest degree of support. The outer wings, which provide additional stability against longitudinal and torsional pressures, are tapped with eight M6-threaded holes.
The standard four-sided rails measure 95 mm to a side and are available in six stock lengths, ranging from 250 to 2000 mm. Precision rails, which have a ±10 arcmin parallelism tolerance on the rail ends, are available in lengths ranging from 66 to 600 mm. Upon request, we can ship the finished standard four-sided rails in any length from 50 to 2000 mm, or we can provide the raw rail extrusion in lengths up to 3.048 m (10'). Precision rails can also be customized up to 2000 mm in length. Finished standard rails feature a durable, clear-anodized coating, while the precision rails feature a black-anodized coating.
Our standard one-sided rails include clearance slots for securing the rails horizontally to an optical table. They are available in either 500 mm or 1000 mm lengths with a durable, clear-anodized coating or in 250 mm, 500 mm, or 750 mm lengths with a black-anodized coating. The one-sided black-anodized rails feature an engraved scale in 1 mm increments for precise and repeatable positioning along the length of the rail. Custom one-sided clear-anodized rails from 50 mm to 2000 mm lengths and custom black-anodized rails from 50 mm to 750 mm lengths can be ordered by contacting Tech Support.
Thorlabs' product family for 95 mm rails includes angle adapters, leveling feet, and breadboard mounting adapters. In addition, we manufacture mounting platforms and T-nuts that provide compatibility with standard optomechanics. Together with size adapters that incorporate 66 mm rails into an XT95 setup, these tools provide a complete family of rigid, versatile building blocks suited for virtually any optomechanical setup.
An end plate is available below for our 95 mm Construction Rails and 95 mm Precision Construction Rails. The end plate covers the entire end of the rail, decreasing the risk of harm due to sharp edges.
Our standard 95 mm Construction Rails have outer wings along their edges that form four effective dovetails (see image to the right). In addition, each rail side features two parallel T-slots spaced 1.81" (46.0 mm) apart. These features allow standard optomechanical components to be mounted directly to the rails, using rail carriages, rail plates, or T-nuts.
In addition, the outer wings are M6-tapped in eight locations. These tapped holes are positioned for direct mechanical compatibility with our leveling feet and base plate, which are designed to mount rail assemblies on flat surfaces.
The standard, four-sided rails are offered from stock in six lengths ranging from 250 to 2000 mm. If our pre-cut lengths do not suit your application, custom lengths from 50 mm to 2000 mm can be ordered by using the XT95-CUSTRAIL field in the price box below. Unanodized rails of custom lengths up to 3.048 m (10') can also be ordered by contacting Technical Support.
These construction rails are also offered as a rough-cut, unanodized extrusion (see below) for our customers who prefer to machine and finish the rails themselves. We also offer precision construction rails below which have a ±10 arcmin angular deviation tolerance.
These 95 mm Precision Construction Rails are similar to the rails sold above, but are designed to a higher angular tolerance for sensitive experimental setups. Precision 95 mm rails are used in the construction of our Cerna® Microscope Bodies. Each rail side features two parallel T-slots spaced 1.81" (46.0 mm) apart. These features allow standard optomechanical components to be mounted directly to the rails, using rail carriages, rail plates, or T-nuts.
The outer wings are M6-tapped in eight locations. These tapped holes are positioned for direct mechanical compatibility with our leveling feet and base plate, which are designed to mount rail assemblies on flat surfaces. Precision rails additionally feature four Ø3.0 mm holes on each wing for use with alignment pins on Cerna components or custom setups.
The standard, four-sided rails are offered from stock in six lengths ranging from 66 to 600 mm. If other lengths up to 2000 mm are needed, please contact Tech Support with inquiries.
The XT95RL2 is an unanodized, rough-cut extrusion for customers who prefer to machine and finish their own rails. Their aluminum construction makes it easy to machine them in your own machine shop.
Upon request, we can provide this extrusion in lengths up to 3.048 m (10'). Please contact Technical Support for a quote.
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Common Single-Sided 95 mm Rail Dimensions
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HeNe Laser on Rail Plate Can be Repositioned for Use in Multiple Setups
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The black-anodized rails feature engraved scales with lines at 1 mm increments.
Our One-Sided 95 mm Construction Rails feature the same mounting surface as our standard four-sided rails. Each side of the rail contains several 2.00" (50.8 mm) long clearance slots that are designed to accept 1/4"-20 (M6) cap screws, and the bottom features a relief cut that stabilizes the rail against the surface to which it is mounted. This compact, versatile design allows XT95-based assemblies to be easily built on top of an optical table or breadboard.
The XT95SP-500 and XT95SP-1000 rails are 500 mm and 1000 mm long, respectively, and have a durable clear-anodized finish. The XT95SD rails range from 250 mm to 750 mm in length and have a black-anodized finish. Each rail in the XT95SD series also includes an engraved scale in 1 mm increments for precise and repeatable positioning along the length of the rail, which can be seen in the image to the right. Custom XT95SP rails from 50 mm to 2000 mm and custom XT95SD rails from 50 mm to 750 mm can be ordered by contacting Tech Support.
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End Plate Mounted onto a 95 mm Construction Rail
The XT95EC1 end plate is designed for use with our XT95 and XT95B construction rails, sold above. This end plate covers the end of the construction rail, giving the rail a clean finish and preventing potential injury due to sharp edges. Using the four included M6 cap screws, the end plate mounts onto the counterbored holes located on each corner of the construction rail. Please note that using the XT95EC1 end plate with the XT95B Precision Construction Rails will cover up the four Ø3.0 mm dowel pin alignment holes.
This end plate is not compatible with our XT95RL2 or XT95SP rails.