Mounting Platforms for 34 mm Rails

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XT34D2-50 Mechanical Drawing

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XT34D2-30 Mechanical Drawing

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Mounting Platform Cross Section

• Includes One or Three 1/4" (M6) Counterbored Holes
• Fastened to Rail with Dovetail Clamps
• Ideal for Attaching Posts, Post Holders, or Pedestal Posts
  to a 34 mm Rail

XT34 Mounting Platforms come in either 30 mm or 50 mm lengths. The 30 mm version (XT34D2-30) holds a single mechanical component, and is perfectly sized to match our XT34C2 Double Dovetail Clamp. In contrast, the 50 mm version (XT34D2-50) can hold up to three mechanical components, and is ideal for situations where optomechanics must be placed in close proximity.

Because the platforms have minimal height, the caps of standard 1/4"-20 or M6 cap screws protrude from the dovetail if they are installed. Thorlabs therefore recommends that low-profile cap screws, which feature a reduced cap height, are used instead. These are offered in both 1/4"-20 and M6 varieties below.

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View Imperial Product List

Item #	Qty	Description
Imperial Product List
LMR1	1	Lens Mount with Retaining Ring for Ø1" Optics, 8-32 Tap
PH2	1	Ø1/2" Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L = 2"
TR3	1	Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
SH25S038	1	1/4"-20 Stainless Steel Cap Screw, 3/8" Long, Pack of 25
XT34HP	1	Dovetail Mounting Clamp for 34 mm Rails
XT34-200	1	34 mm Construction Rail, L = 200 mm
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View Metric Product List

Item #	Qty	Description
Metric Product List
LMR1/M	1	Lens Mount with Retaining Ring for Ø1" Optics, M4 Tap
PH50/M	1	Ø12.7 mm Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L=50 mm
TR75/M	1	Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
SH6MS10	1	M6 x 1.0 Stainless Steel Cap Screw, 10 mm Long, Pack of 25
XT34HP/M	1	Dovetail Mounting Clamp for 34 mm Rails, Metric
XT34-200	1	34 mm Construction Rail, L = 200 mm
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XT34HP Fastens to a Rail without Additional Clamps

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The XT34HP Mounting Clamp can be used to secure a rail to a breadboard or optical table.

• Two Counterbored Holes for 1/4"-20 (M6) Cap Screws
• Ideal for Attaching Posts, Post Holders, or Pedestal Posts to a 34 mm Rail
• Slide Along Rail Prior to Lockdown
• Mount 34 mm Rails to Any Breadboard with 1/4"-20 or M6 Taps
• 1/4"-20 (M6) Tapped Hole Provides Side Mounting

Our XT34HP Mounting Clamp has a built-in dovetail clamp for direct compatibility with 34 mm rails. It contains two 1/4" (M6) counterbored holes that can be used to mount posts, pedestal posts, or post holders to the top or side of a 34 mm rail, as shown in the image to the right. The counterbores in this part accept standard and low-profile cap screws.

When flipped, the clamp can also be used to secure a 34 mm rail to a breadboard. The spacing between the counterbores, which is either 1" (25.4 mm) or 25 mm, is specifically designed for direct compatibility with either imperial or metric breadboards.

These 1/4"-20 (M6) screws are used to attach optomechanical components to our XT34 mounting platforms. The low-profile head provides the clearance needed to fasten the mounting platform to an XT34 rail clamp.