Breadboard Mounting Accessories for 25 mm Rails

Construct 25 mm Rail Assemblies on Top of Breadboards
Options for Horizontal or Vertical Rail Mounting

XE25CL2

Table Clamp with Slot for 1/4"-20 (M6) Cap Screws

XE25A90

Right Angle Bracket with Counterbored Holes for 1/4"-20 (M6) Cap Screws

Bracket Orients Rail Orthogonal
to Plane of Breadboard

AB90H

Right Angle Bracket with Counterbored Slots for 1/4"-20 (M6) Cap Screws

Please Wait

Overview
Feedback

XE25 25 mm Construction Rail Accessories

Rails	Cubes and Brackets	Breadboard Mounting	Rail Joiners	Channel Insert

Construction Tools	T-Nuts and Screws	Enclosures		Enclosure Accessories

Features

Mount 25 mm Construction Rails to Breadboards
Table Clamp Mounts Rails Horizontally
Right-Angle Brackets Orient Rails Vertically

Thorlabs provides options for customers who wish to build a 25 mm rail system on top of an optical table or breadboard. The XE25CL2 Table Clamp secures a rail parallel to the breadboard surface, while the XE25A90 and AB90H Right-Angle Brackets mount a rail in a standing position.

Thorlabs' accessories for assemblies made of 25 mm rails include corner cubes and brackets, T-Nuts, low-profile channel screws, breadboard mounting accessories, rail joiners, and a channel insert. In addition, we offer optical enclosures, enclosure accessories, laser safety fabric panels, and do-it-yourself tools like taps, tap guides, and drill guides for home-built XE25-based constructions.

Posted Comments:

Marina Marina Martinez (posted 2025-11-11 14:34:48.687)

Hello, I have a question regarding the rail clamp XE25CL2. Please could you confirm whether this product is suitable for clamping 25mm rails? It seems like the gap to lock and clamp the rail is 6.4mm, while the rail has a distance of 7.1mm. This would create a large interference that would not allow the clamp to be flat on the breadboard. Please correct me if I have interpreted the design intent incorrectly. Thanks, Marina

jdelia (posted 2025-11-13 08:08:04.0)

Thank you for contacting Thorlabs. The clamp is not meant to lay completely flat on the breadboard. I have reached out to you directly to discuss this further.

Table Clamp for 25 mm Rails

Zoom

Click to Enlarge

Mount 25 mm Rails Horizontally on an Optical Table or Breadboard
1" (25.4 mm) Long Clearance Slot for 1/4"-20 or M6 Screws
Insert Anywhere Along Rail

The XE25CL2 Table Clamp mounts a 25 mm rail horizontally to a 1/4"-20 or M6 tapped surface by using a rail channel. It holds the rail in place using a side-located rail channel, while leaving the top rail channel free to accept enclosure panels or T-Nuts. The clamp features a 1" (25.4 mm) long clearance slot compatible with 1/4"-20 and M6 screws, providing mounting for imperial and metric tables.

Right-Angle Brackets for 25 mm Rails

Zoom

Click to Enlarge
Figure 249B Reinforced Corner

Click to Enlarge
Figure 249A Enclosure Bolted to Optical Table

Brace 25 mm Rail Corners or Mount Rails Vertically
One-Piece Aluminum Construction for Excellent Rigidity
For Use with 1/4"-20 (M6) Cap Screws

The AB90H and XE25A90 Right-Angle Brackets can be used to fasten 25 mm rails to each other using a T-Nut (sold separately) or to an optical table. Both intended for use with 1/4"-20 (M6) cap screws and washers, the AB90H has a total of two 1/4" wide slots of lengths of 1" (25.4 mm) and 0.5" (12.7 mm), allowing for additional flexibility in positioning the rails on a breadboard, while the XE25A90 has two counterbored holes.

These brackets are ideal for fastening our optical enclosures to an optical table or breadboard.