Quick Connect Component Positioners for 3" Rails and Stages

  • Fine Adjustment of Platforms Along the Rail Axis
  • Positioner Provides Up to 1.49" (37.8 mm) of Translation
  • Return Positioner Travels Up to 0.29" (7.2 mm)



Application Idea

Fine Tuning the Position of a Translation Stage

Related Items

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XR25N DiagramClick to Enlarge
XR25N Positioner
XR25N1 DiagramClick to Enlarge
XR25N1 Return Positioner


  • Clamps Directly to 3" XR Mating Dovetails
  • Included Dovetail Clamp Screw has a Maximum Torque of 15 in•lbs
  • Fine Positioning of Stages and Carriers Along a 3" Dovetail Rail
  • XR25N(/M) Positioner:
    • 1/4"-80 Adjuster Screw Provides 0.013" (320 µm) of Translation per Revolution
    • Translation Range of 1.49" (37.8 mm)
  • XR25N1(/M) Return Positioner:
    • Spring Loaded Plunger with Travel Range of 0.29" (7.2 mm)
    • Use with XR25N Positioner for Bidirectional Adjustment
  • Quickly Connect Stages and Accessories Using 3" Dovetails
    • See the Quick-Connect Stages Tab for Complete Line of Components

The XR25N(/M) Translation Stage Positioner and XR25N1(/M) Translation Stage Return Positioner are designed to aid in fine alignment of stages or carriers mounted on a 3" dovetail rail. Each positioner includes a 3" mating dovetail that can be locked to the rail using a clamping mechanism (3/16" [5 mm] hex), providing quick and convenient placement along the rail. The end opposite the clamp also offers two 8-32 (M4 x 0.7) mounting holes.

The XR25N(/M) incorporates an F25SS200 1/4"-80 adjuster screw to provide smaller, smoother movement than coarse translation by hand. The screw allows for 1.49" (37.8 mm) of travel before the interior of the bushing is exposed; longer adjuster screws can be installed if desired.

The XR25N1(/M) translation stage return positioner is comprised of a spring-loaded plunger integrated into a 3" mating dovetail clamp. The plunger can travel a maximum range of 0.29" (7.2 mm), and the compression spring tension can also be adjusted with a 5/32" (4.0 mm) hex driver. When used in conjunction, the XR25N(/M) positioner and XR25N1(/M) return positioner provide precision alignment along the axis of the rail. When a carrier or stage is placed between the translation stage positioners, actuating the adjustment screw pushes it toward the XR25N1(/M) return positioner, compressing the spring loaded plunger. Retracting the adjustment screw on the XR25N(/M) positioner causes the spring-loaded plunger on the XR25N1(/M) return positioner to expand, which keeps the carrier or stage in contact with the actuating screw of the XR25N(/M) positioner.

To use, place and lock the positioners along the rail so that they are both in contact with the stage or carrier. Loosen the clamp holding the stage or carriage to the rail, then turn the adjuster screw with a 5/64" (2.0 mm) balldriver to push the platform until the desired amount of translation is achieved.

For our complete selection of 3" dovetail components, see the Quick-Connect Stages tab.

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Build Multi-Axis Configurations

Vertical Rotation Translation Stage
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Z-axis assembly kits allow stages to be mounted in vertical orientations.

Quick-Connect Dovetails

Quick Connect Translation Stages
Click to Enlarge
The female dovetails on the bottom of one stage mate with the male dovetails on another.

XR & XRN Dovetail Stages and Accessories

Our XR series manual stages feature quick-connect dovetails that allow for the construction of multi-axis systems without the need for additional hardware. The common dovetail feature with a single locking clamp makes it quick and simple to swap parts in and out while preserving excellent orthogonality.

Our selection of products with a quick-connect dovetail includes:

  • Linear Translation Stages:
    • Stackable 1-Axis Stages
    • Pre-Assembled 2- and 3-Axis Configurations
  • Rotational Stages:
    • 360° Flat Rotation
    • Tip/Tilt Goniometers
  • Adapters:
    • Z-Axis Assembly Kits
    • Parallel and Perpendicular Mounting between 2" and 3" Dovetails
  • Rail Accessories:
    • Stationary Mounting Platforms
    • Rail Component Positioners
  • Base Plates and Rails

Most items are available in compact (2" dovetail) and full-size (3" dovetail) varieties. Adapters are available to interface between the two sizes. See the tables below for all available options.

Linear Translation Stages
Click Photo to Enlarge XRN Stages XR Stages XRN Stages
Items Compact 25 mm Stages Compact 9 mm Vertical Stage Full-Size 25 mm Stages Full-Size 50 mm Stages 14 mm Vertical Stage
Motion X, Y, Z, XY, XZ, YZ, XYZ Z (Vertical) X, Y, Z, XY, XZ, YZ, XYZ X, Y, Z, XY, XZ, YZ, XYZ Z (Vertical)
Quick-Connect Dovetail 2" Dovetail 3" Dovetail
Additional Features info info info info info


Rotation and Goniometric Stages
Click Photo to Enlarge
Items Compact Rotation Stage Compact Goniometric Stages Full-Size Rotation Stage
Motion 360° Rotation ±8° Tip/Tilt About Fixed Point Above Stage 360° Rotation
Quick-Connect Dovetail 2" Dovetail 3" Dovetail
Additional Features info info info


Dovetail Accessories
Mounting Platforms XRN Platforms XR Platforms
2" Mounting Platforms 3" Mounting Platforms
Rail Positioners Rail Positioner
2" Rail Positioners 3" Rail Positioners

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
XR25N Support Documentation
XR25NTranslation Stage Positioner for Stages with 3" Dovetails, Imperial
XR25N1 Support Documentation
XR25N1Translation Stage Return Positioner for Stages with 3" Dovetails, Imperial
+1 Qty Docs Part Number - Metric Price Available
XR25N/M Support Documentation
XR25N/MTranslation Stage Positioner for Stages with 3" Dovetails, Metric
XR25N1/M Support Documentation
XR25N1/MTranslation Stage Return Positioner for Stages with 3" Dovetails, Metric