Compact Quick Connect Component Positioners for 2" Rails and Stages

  • Fine Adjustment of Platforms Along the Rail Axis
  • Positioner Provides Up to 0.40" (10.2 mm) of Translation
  • Return Positioner Travels Up to 0.17" (4.3 mm)




Return Positioner

Application Idea

Fine Tuning the Position of a Translation Stage

Related Items

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XRNN Positioner
XXXClick to Enlarge
XRNN1 Return Positioner


  • Clamps Directly to 2" XRN Mating Dovetails
    • See the Quick-Connect Stages Tab for Complete Line of Compatible Components
  • Included Dovetail Clamp Screw has a Maximum Torque of 15 in•lbs
  • Fine Positioning of Stages and Carriers Along a 2" Dovetail Rail
  • XRNN(/M) Positioner:
    • 1/4"-80 Adjuster Screw Provides 0.013" (320 µm) of Translation per Revolution
    • Translation Range of 0.40" (10.2 mm)
  • XRNN1(/M) Return Positioner:
    • Spring Loaded Plunger with Travel Range of 0.17" (4.3 mm)
    • Use with XRNN(/M) Positioner for Bidirectional Adjustment

The XRNN(/M) Translation Stage Positioner and XRNN1(/M) Translation Stage Return Positioner are designed to aid in fine alignment of stages or carriers mounted on a 2" dovetail rail. Each positioner includes a 2" mating dovetail that can be locked to a 2" dovetail rail using a clamping mechanism (3/16" [5.0 mm] hex), providing quick and convenient placement along the rail.

The XRNN(/M) incorporates an F25SS100 1/4"-80 adjuster screw to provide smaller, smoother movement than coarse translation by hand. The screw allows for 0.4" (10.2 mm) of travel before the interior of the bushing is exposed; longer adjuster screws can be installed if desired.

The XRNN1(/M) translation stage return positioner is comprised of a spring-loaded plunger integrated into a 2" mating dovetail clamp. The plunger can travel a maximum range of 0.17" (4.3 mm), and the compression spring tension can also be adjusted with a 5/32" (4.0 mm) hex driver. When used in conjunction, the XRNN(/M) positioner and XRNN1(/M) return positioner provide precision alignment along the axis of a rail. When a carrier or stage is placed between the translation stage positioners, actuating the adjustment screw pushes it toward the XRNN1(/M) return positioner, compressing the spring loaded plunger. Retracting the adjustment screw on the XRNN(/M) positioner causes the spring-loaded plunger on the XRNN1(/M) return positioner to expand, which keeps the carrier or stage in contact with the actuating screw of the XRNN(/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 2" 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
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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
XRNN Support Documentation
XRNNTranslation Stage Positioner for Stages with 2" Dovetails, Imperial
XRNN1 Support Documentation
XRNN1Translation Stage Return Positioner for Stages with 2" Dovetails, Imperial
+1 Qty Docs Part Number - Metric Price Available
XRNN/M Support Documentation
XRNN/MTranslation Stage Positioner for Stages with 2" Dovetails, Metric
XRNN1/M Support Documentation
XRNN1/MTranslation Stage Return Positioner for Stages with 2" Dovetails, Metric