Mounting Brackets & Gusset Plates for 50 mm & 75 mm Rails


  • Mount and Support Vertical 50 mm & 75 mm Construction Rails
  • Right-Angle Brackets for Breadboard Mounting and Corners
  • Gusset Plates for Elbows and T-Junctions
  • X- and T-Brackets for 90° Positioning

XE50A90

Right-Angle Bracket
for 50 mm Rails

XE75GP6

Tee Gusset Plate for
50 and 75 mm Rails

XE50GP

Elbow Gusset Plate
for 50 mm Rails

XE75A90

Right-Angle Bracket
for 75 mm Rails

XET1L

Large T-Bracket for
50 mm and 75 mm Rails

Related Items


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50 mm & 75 mm Construction Rail Accessories
50 mm Rails 75 mm Rails Nuts and Screws Mounts Feet Rail Joiners Channel Cover
50 mm Rails 75 mm Rails T-Nuts and
Screws
Right-Angle
Mounting
Mounting Feet Rail Joiners Channel Insert

Features

  • 90° Brackets for Breadboard Mounting and Rail Corners
  • Gusset Plates Reinforce Elbows and Three-Way Junctions
  • X- and T-Shaped Brackets Align Rails at 90°
  • Compatible with 50 mm Square, 50 mm x 75 mm, or 75 mm Square Rails

These accessories enable vertical mounting of optical rails with 50 mm or 75 mm sides. The right-angle brackets can be used as rail corner mounts or for direct mounting to our breadboards and optical tables. Gusset plates are used to reinforce rail construction corners. The X- and T-shaped brackets align two rails at 90° to each other.

Thorlabs' accessories for assemblies made of 50 mm or 75 mm rails include T-nuts, low-profile channel screws, rail joiners, and a plastic channel insert for use as a dust cover, panel holder, or cable router.


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Right-Angle Brackets

XE75A90 as Breadboard Mount
Click to Enlarge

75 mm Square Rail Bolted to Optical Table Using XE75A90 Bracket
XE50A90 as Breadboard Mount
Click to Enlarge

50 mm Square Rail Bolted to Optical Table Using XE50A90 Bracket
  • Brace 50 mm or 75 mm Rail Corners or Mount Rails Vertically
  • One-Piece Aluminum Construction for Excellent Rigidity
  • Universal Slot Spacing for Imperial and Metric Breadboard Compatibility
  • 1.34" (34.0 mm) Long Slots For Use with 1/4"-20 (M6 x 1.0) Cap Screws and Washers

The XE50A90 and XE75A90 Right-Angle Brackets can be used to fasten 50 mm and 75 mm rails, respectively, to each other or to an optical table. Each bracket can be secured to an optical rail by screwing it to T-nuts (not included) inserted into the rail channels. The XE50A90 and XE75A90 brackets have two slots on each leg with 0.99" (25.2 mm) or 1.98" (50.4 mm) spacing, respectively, for compatibility with either imperial or metric breadboards. Either the XE50A90 or the XE75A90 bracket may be used with our 50 mm x 75 mm rails, depending on which side of the rail(s) the bracket is attached to.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
XE50A90 Support Documentation
XE50A90Right-Angle Bracket for 50 mm Rails
$75.76
Today
XE75A90 Support Documentation
XE75A90Right-Angle Bracket for 75 mm Rails
$90.02
Today

Elbow Gusset Plates

Gusset Plate for Construction Rails
Click to Enlarge

XE75GP3 Gusset Plate Connecting a 50 mm Rail to a 75 mm Rail
Item # Rail 1 Rail 2 Recommended
# of Nut &
Screw Setsa
XE50GP2 25 mm 50 mm 5
XE50GP 50 mm 8
XE75GP2 25 mm 75 mm 7
XE75GP3 50 mm 10
XE75GP 75 mm 12
  • Connect Two Rails at a 90° Elbow
  • 1/8" (3.2 mm) Thick Anodized Aluminum
  • For Use with Low-Profile 1/4"-20 (M6 x 1.0) Channel Screws and T-Nuts (Sold Separately; See Table to the Right for Details)

These gusset plates are used to create strong 90° elbows using our 25 mm, 50 mm, and 75 mm rails. They provide reinforcement similar to the right-angle brackets sold above but do not block the inner channels of the elbow joint, instead leaving them open for hardboard or plexiglass panels. Each gusset plate features mounting holes designed for use with low-profile 1/4"-20 (M6 x 1.0) channel screws (10 mm max length) and matched T-nuts (both sold separately). When attaching rails of different sizes, we recommend mounting the smaller rail using multiple holes along the base of the gusset plate to provide additional rigidity, if possible.

To assemble, insert the screws into the gusset plate and loosely thread them into nuts on the back. Then slide the nuts into the rail channels and align the rail ends. With the rails aligned, tighten the channel screws.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
XE50GP2 Support Documentation
XE50GP2Elbow Gusset Plate for XE25 to XE50 Rail
$18.67
Today
XE50GP Support Documentation
XE50GPElbow Gusset Plate for XE50 to XE50 Rail
$23.06
Today
XE75GP2 Support Documentation
XE75GP2Elbow Gusset Plate for XE25 to XE75 Rail
$20.31
Today
XE75GP3 Support Documentation
XE75GP3Elbow Gusset Plate for XE50 to XE75 Rail
$25.26
Today
XE75GP Support Documentation
XE75GPElbow Gusset Plate for XE75 to XE75 Rail
$30.74
Today

Tee Gusset Plates

Gusset Plate for Construction Rails
Click to Enlarge

XE75GP6 Gusset Plate Connecting a 50 mm Rail to a 75 mm Rail
Item # End
Rail(s)
Center
Rail
Recommended
# of Nut &
Screw Setsa
XE50GP4 25 mm 50 mm 6
XE50GP3 50 mm 12
XE75GP5 25 mm 75 mm 8
XE75GP6 50 mm 14
XE75GP4 75 mm 18
  • Connect Two or Three Rails in a Three-Way Junction
  • 1/8" (3.2 mm) Thick Anodized Aluminum
  • For Use with Low-Profile 1/4"-20 (M6 x 1.0) Channel Screws and T-Nuts (Sold Separately; See Table to the Right for Details)

These gusset plates are used to create strong three-way junctions using our 25 mm, 50 mm, and 75 mm rails. They provide reinforcement similar to the elbow gusset plates sold above but with additional mounting holes to form a tee. Each gusset plate features mounting holes designed for use with low-profile 1/4"-20 (M6 x 1.0) channel screws (10 mm max length) and matched T-nuts (both sold separately).

To assemble, insert the screws into the gusset plate and loosely thread them into nuts on the back. Then slide the nuts into the rail channels and align the rail ends. With the rails aligned, tighten the channel screws.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
XE50GP4 Support Documentation
XE50GP4Tee Gusset Plate for XE25 to XE50 Rail
$19.76
Today
XE50GP3 Support Documentation
XE50GP3Tee Gusset Plate for XE50 to XE50 Rail
$26.90
Today
XE75GP5 Support Documentation
XE75GP5Tee Gusset Plate for XE25 to XE75 Rail
$21.41
Today
XE75GP6 Support Documentation
XE75GP6Tee Gusset Plate for XE50 to XE75 Rail
$29.64
Today
XE75GP4 Support Documentation
XE75GP4Tee Gusset Plate for XE75 to XE75 Rail
$36.78
Today

X- and T-Shaped Brackets

Rotating Wave Plate Method
Click to Enlarge
View Imperial Product List
Item #QtyDescription
XET11T-Bracket for XE25 Extrusions
XE50L20250 mm Square Construction Rail, 20" Long, 1/4"-20 Taps
XE50A901Right-Angle Bracket for 50 mm Rails
SH25S05011/4"-20 Stainless Steel Cap Screw, 1/2" Long, 25 Pack
XE25T11Drop-In T-Nut, 1/4"-20 Tapped Hole, 10 Pack
View Metric Product List
Item #QtyDescription
XET11T-Bracket for XE25 Extrusions
XE50L20250 mm Square Construction Rail, 20" Long, 1/4"-20 Taps
XE50A901Right-Angle Bracket for 50 mm Rails
SH6MS121M6 x 1.0 Stainless Steel Cap Screw, 12 mm Long, 25 Pack
XE25T1/M1Drop-In T-Nut, M6 x 1.0 Tapped Hole, 10 Pack
An X-shaped bracket secures two 50 mm rails at 90°.
  • Secure Two 50 mm or 75 mm Rails in a 90° Alignment
  • Raised Guides fit in Rail Channels for Quick Alignment
  • X and T Shapes for Precise Positioning

Thorlabs' X- and T-Shaped Brackets allow 50 mm or 75 mm Rails to be connected in 90° orientations.

Each bracket comes with four pre-installed M4 screws and T-nuts. To mount a bracket on an XE50 or XE75 series rail, first loosen the attached T-nuts until they can rotate freely. Then, insert the T-nuts on one side of the bracket into one of the rail channels. Ensure the T-nuts are rotated so that they will engage with the rail channels and the raised section of the bracket is sitting in the channel to ensure proper alignment. Tighten the M4 screws with a 1/8" (3 mm) hex key or ball driver to secure the bracket in place. Once the bracket is secured to the first rail, the procedure can be repeated for the second rail, using the raised section on the opposite face to align the second rail at 90° to the first.

The X-bracket can be used to position two rails perpendicularly along their length, while the T-bracket's design allows it to be used to position one rail perpendicularly at the end of a second rail, without the bracket extending beyond the setup.

Thorlabs also offers X- and T-shaped brackets for compatibility with our 25 mm rails.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
XEX1L Support Documentation
XEX1LX-Bracket for XE50 and XE75 Extrusions
$100.98
Today
XET1L Support Documentation
XET1LT-Bracket for XE50 and XE75 Extrusions
$100.98
Today