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Compact Rotation Stage with Crossed-Roller Bearing


  • Continuous 360° Manual Rotation with ±5° Fine Adjustment
  • Vernier Scale Provides 5 arcmin Resolution
  • Low Axial Wobble and High Load Capacity
  • Integrated 2" Wide Dovetails for Quick-Connect Construction

Fine Adjuster

Rotation Locking Screw

Fine Adjuster Engagement Screw

Dovetail Locking Screw

Application Idea

The XRNR1 Rotation Stage is directly compatible with our XRN Series Stages. Here it is shown mounted on an XRN25P stage with a dispersing prism and a PM3 Clamping Arm.

XRNR1

Compact Rotation Stage

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Specifications
Item # XRNR1(/M)
Coarse Rotation Range 360°, Continuous
Fine Adjustment Range ±5°
Fine Adjustment
Resolution (Nominal)
8.33 mrad/rev (0.477°/rev)
Axial Wobble <500 µrad (0.028°)
Horizontal
Load Capacity
Overall: 30 lbs (13.6 kg)
Fine Adjustment: 10 lbs (4.54 kg)
Vertical Torque Capacitya 5 lb-in (0.56 N·m)
Platform Size Ø2.21" (Ø56.0 mm)
Platform Mounting
Holes
1/4"-20 (M6) (13 Places)
8-32 (M4) (4 Places)
6-32 (M4) (4 Places)
Mounted
Platform Height
On Breadboard: 0.91" (23.0 mm)b
Dovetail Stacked: 0.83" (21.0 mm)
Base Dimensions 3.35" x 2.52" (85.0 mm x 63.9 mm)
Base Mounting Features 2" Wide Quick Connect Dovetails
Mounting Slot for 1/4"-20 (M6)
Cap Screws (4 Places)
  • The maximum torque about an axis orthogonal to the rotation axis, commonly encountered when the stage's base is mounted on a vertical surface. The center of mass should be as close as possible to the center of rotation.
  • The stage profile is higher when it is mounted using the screw slots rather than stacked on another stage or accessory with 3" dovetails.

Click to Enlarge

The 2" wide female dovetails on the bottom of the stage mate with the male dovetails on another stage to form multi-axis configurations. The left female dovetail is on a retractable clamping arm, allowing stages to be dropped into place.

The XRNR1(/M) Rotation Stage provides 360° of coarse rotation
and ±5° of fine rotation. Each stage features 2" dovetails on the top and bottom plate that allow for quick construction of multi-axis systems. The top stage can be locked at any location along the dovetail, allowing for coarse positioning. The base of the stage also has counterbores for mounting directly to optical breadboards.

Features

  • 360° of Continuous Coarse Rotation and ±5° Fine Adjustment
  • Vernier Scale Provides 5 arcmin Resolution
  • Radial Crossed-Roller Bearing for High Load Capacity and Low Axial Wobble
  • Circumference is Laser Engraved at 1° Increments
  • Quickly Connect XRN25 Series Compact Translation Stages and Accessories Using 2" Wide Dovetails
  • Tapped Holes for Standard Optomechanics and Clamping Arms
  • Optional Accessories Provide Additional Functionality:
    • Vertical Assembly Kits: Mount Stages Orthogonally to Breadboard
    • Rail Carriers: Removable Plates with Additional Mounting Options
    • Mounting Adapters: Mount 2" Dovetail Stages to 3" Dovetail Stages or Extended Baseplates
    • Baseplates: Coarse Alignment of Stage with Table Hole Matrix
    • Clamping Arms: Provide Clamping Force for Prisms or Other Components

Thorlabs' XRNR1(/M) Rotation Stage provides 360° of continuous manual rotation and features a side-mounted screw for fine adjustment. It also incorporates a radial crossed-roller bearing design for high load capacity and low axial wobble. This dedicated, zero-clearance bearing mechanism also provides an axial constraint for the rotating world, resulting in superior stiffness compared to other bearing types. The top and bottom plates are machined from cast tool and jig aluminum for minimal internal stress and improved stability. The rotating world features an array of mounting holes and 2" wide male dovetails for compatibility with our XRN25 compact translation stages and the accessories sold below. We also offer the XRR1 Rotation Stage with 3" wide male dovetails.

When the fine adjustment is disengaged, the stage can be smoothly and continuously rotated by hand through a full 360°, measured by the 1° graduation marks on the circumference of the stage. When the fine adjustment is engaged, the fine adjuster screw provides ±5° of fine adjustment, measured with 5 arcmin resolution by the vernier scale. The end of the adjuster screw incorporates a 5/64" (2.0 mm) hex allowing it to be actuated in space-constrained environments. The adjuster knob can also be removed using a hex key, as illustrated in the video on our kinematic mirror mounts page. The rotating platform is lockable using the 5/64" (2.0 mm) hex screw on the end of the base. The top plate of each stage is tapped with an array of mounting holes. The base can be attached to an optical table or breadboard using the four 1/4" (M6) counterbored clearance slots.

Each stage features 2" wide mating female dovetails on the bottom plate and male dovetails on the top plate (as shown in the image above) that allow for quick construction of multi-axis systems using no additional hardware. Refer to the photos in the vertical assembly kits section below to see how multi-axis systems can be quickly constructed using this novel design. The 2" dovetails on our XRNR1(/M) rotation stage are directly compatible with the dovetails on our XRN25 series compact translation stages. Additional functionality is provided by a complete line of accessories that include multi-axis assembly kits, rail carriers, baseplates, and stage positioners. An adapter plate for mounting to our larger XR25 and XR50 Series Stages with integrated 3" wide dovetails is also available. For more information about a specific accessory, please click on the link in the table below.

Figure 1: Vernier scale measuring 76.0
Click to Enlarge

Figure 1: An example of how to read a vernier scale. The red arrow indicates what is known as the pointer. Since the tick mark labeled 10 on the vernier scale aligns with one of the tick marks on the main scale, this vernier scale is reading 75.60 (in whatever units the tool measures).

Reading a Vernier Scale

Vernier scales are typically used to add precision to standard, evenly divided scales (such as the scale on Thorlabs’ rotation mounts). A vernier scale has found common use in many precision measurement tools, the most common being calipers and micrometers. The direct vernier scale uses two scales side-by-side: the main scale and the vernier scale. The vernier scale has a slightly smaller spacing between its tick marks (10% smaller than the main). Hence, the lines on the main scale will not line up with all the lines on the vernier scale. Only one line from the vernier scale will match well with one line of the main scale, and that is the trick to reading a vernier scale.

Figures 1 through 3 show a vernier scale system for three different situations. In each case, the scale on the left is the main scale, while the small scale on the right is the vernier scale. When reading a vernier scale, the main scale is used for the gross number, and the vernier scale gives the precision value. In this manner, a standard ruler or micrometer can become a precision tool.

The 0 on the vernier scale is the “pointer” (marked by a red arrow in Figs. 1 – 3) and will indicate the main scale reading. In Figure 1 we see the pointer is lined up directly with the 75.6 line. Notice that the only other vernier scale tick mark that lines up well with the main scale is 10. Since the vernier 0 lines up with the main scale’s 75.6, the reading from Figure 1 is 75.60 (in whatever units the tool measures in).

That is essentially all there is to reading a vernier scale. It's a very straightforward way of increasing the precision of a measurement tool. To expound, let’s look at Figure 2. Here we see that the pointer is no longer aligned with a scale line, instead it is slightly above 75.6, but below 75.7; thus the gross measurement is 75.6. The first vernier line that coincides with a main scale line is the 5, shown with a blue arrow. The vernier scale gives the final digit of precision; since the 5 is aligned to the main scale, the precision measurement for Figure 2 is 75.65.

Since the vernier scale is 10% smaller than the main scale, moving 1/10 of the main scale will align the next vernier marking. This asks the obvious question: what if the measurement is within the 1/10 precision of the vernier scale? Figure 3 shows just this. Again, the pointer line is in between 75.6 and 75.7, yielding the gross measurement of 75.6. If we look closely, we see that the vernier 7 (marked with a blue arrow) is very closely aligned to the main scale, giving a precision measurement of 75.67. However, the vernier 7 is very slightly above the main scale mark, and we can see that the vernier 8 (directly above 7) is slightly below its corresponding main scale mark. Hence, the scale on Figure 3 could be read as 75.673 ± 0.002. A reading error of about 0.002 would be appropriate for this tool.

As we've seen here, vernier sclaes add precision to a standard scale measurement. While it takes a bit of getting used to, with a little practice, reading these scales is fairly straightforward. All vernier scales, direct or retrograde, are read in the same fashion.

Figure 1: Vernier scale measuring 76.0
Click to Enlarge

Figure 2: An Example of a vernier scale. The red arrow indicates the pointer and the blue arrow indicates the vernier line that matches the main scale. This scale reads 75.65.
Figure 1: Vernier scale measuring 76.0
Click to Enlarge

Figure 3: An Example of a vernier scale. The red arrow indicates the pointer and the blue arrow indicates the vernier line that matches the main scale. This scale reads 75.67, but can be accurately read as 75.673 ± 0.002.

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Rotation Mount and Stage Selection Guide

Thorlabs offers a wide variety of manual and motorized rotation mounts and stages. Rotation mounts are designed with an inner bore to mount a Ø1/2", Ø1", or Ø2" optic, while rotation stages are designed with mounting taps to attach a variety of components or systems. Motorized options are powered by a DC Servo motor, 2 phase stepper motor, or an Elliptec™ resonant piezo motor. Each offers 360° of continuous rotation.

Manual Rotation Mounts

Rotation Mounts for Ø1/2" Optics
Item # MRM05(/M) RSP05(/M) CRM05 PRM05(/M)a SRM05 KS05RS CT104
Click Photo
to Enlarge
Features Mini Series Standard External SM1
(1.035"-40) Threads
Micrometer 16 mm Cage-Compatible ±4° Kinematic Tip/Tilt Adjustment Plus Rotation Compatible with CT1 Cage Translator Stage and 1/4" Translation Stagesb
Additional Details
  • This mount is available in the PRM05GL5 bundle, which includes the PRM05 rotation mount with the SM05PM5 polarizing prism mount.
  • The CT104 is complatible with the 1/4" translation stages using our MS103(/M) adapter plate.
  • The CT104 is compatible with the CT1 cage translation stage, which is designed for use with 30 mm cage systems.

Rotation Mounts for Ø1" Optics
Item # RSP1(/M) LRM1 RSP1D(/M) DLM1(/M) CLR1(/M) RSP1X15(/M) RSP1X225(/M) PRM1(/M)a
Click Photo
to Enlarge
LRM1
Features Standard External SM1
(1.035"-40) Threads
Adjustable Zero Two Independently Rotating Carriages Rotates Optic Within
Fixed Lens Tube System
Continuous 360° Rotation
or 15° Increments
Continuous 360° Rotation
or 22.5° Increments
Micrometer
Additional Details
  • This mount is available in the PRM1GL10 bundle, which includes the PRM1 rotation mount with the SM1PM10 polarizing prism mount.

Rotation Mounts for Ø1" Optics
Item # LM1-A &
LM1-B(/M)
CRM1(/M) CRM1L(/M) CRM1P KS1RS K6XS
Click Photo
to Enlarge
Features Optic Carriage Rotates Within Mounting Ring 30 mm Cage-Compatiblea 30 mm Cage-Compatible
for Thick Opticsa
30 mm Cage-Compatible
with Micrometera
±4° Kinematic Tip/Tilt Adjustment Plus Rotation Six-Axis
Kinematic Mounta
Additional Details
  • This mount also features four 4-40 (M3) holes on the rotation dial for use with the K6A1(/M) prism platform.

Rotation Mounts for Ø2" Optics
Item # RSP2(/M) RSP2D(/M) PRM2(/M) LM2-A &
LM2-B(/M)
LCRM2(/M) KS2RS K6X2
Click Photo to Enlarge
Features Standard Adjustable
Zero
Micrometer Optic Carriage Rotates Within Mounting Ring 60 mm Cage-Compatible ±4° Kinematic Tip/Tilt Adjustment Plus Rotation Six-Axis Kinematic Mount
Additional Details

Manual Rotation Stages

Manual Rotation Stages
Item # RP005(/M) PR005(/M) MSRP01(/M) RP01(/M) RP03(/M) QRP02(/M)
Click Photo
to Enlarge
Continuous Rotation Mount
Features Standard Two Hard Stops
Additional Details

 

Manual Rotation Stages
Item # XRR1(/M) PR01(/M) CR1(/M) XYR1(/M) OCT-XYR1(/M)
Click Photo
to Enlarge
Features Fine Rotation Adjuster and
3" Wide Dovetail Quick Connect
Fine Rotation Adjuster and
SM1-Threaded Central Aperture
Fine Pitch Worm Gear Rotation and 1/2" Linear XY Translation
Additional Details
  • The stage profile is higher when it is mounted using the screw slots rather than stacked on another stage or accessory with 3" dovetails.
  • The OCT-XYR1(/M) stage includes the XYR1A solid sample plate. This plate can be detached from the stage to reveal the same mounting features present on the XYR1(/M) stage.

Motorized Rotation Mounts and Stages

Motorized Rotation Mounts and Stages
Item # DDR25(/M) K10CR1(/M) PRM1Z8(/M)a PRMTZ8(/M)b DDR100(/M) HDR50(/M) ELL18(/M)c
Click Photo
to Enlarge
Features Compatible with
SM05 Lens Tubes,
16 mm Cage System,
30 mm Cage System
Compatible with SM1 Lens Tubes and
30 mm Cage System
Tapped Mounting Platform for Mounting Prisms or Other Optics Compatible with
SM1 Lens Tubes,
16 mm Cage System,
30 mm Cage System
Compatible with
SM2 Lens Tubes
Tapped Mounting Platform, Open Frame Design for OEM Applications
Additional Details
  • This stage is available in the KPRMTE(/M), which includes the PRMTZ8(/M) Motorized Rotation Stage with the KDC101 K-Cube DC Servo Motor Controller.
  • This stage is available in the KPRM1E(/M), which includes the PRMT1Z8(/M) Motorized Rotation Stage with the KDC101 K-Cube DC Servo Motor Controller.
  • This stage is available in the ELL18K(/M), which includes an interface board, mounting brackets, and connectors for PC control.

Compact Rotation Stage with Crossed-Roller Bearing and 2" Dovetail Mounting


Click for Details

XRNR1/M Rotating World Features

Click for Details

XRNR1 Rotating World Features
  • Coarse Manual Rotation and ±5° Fine Adjustment
  • Rotation Locking Screw with 5/64" (2.0 mm) Hex
  • Four Slots for Breadboard Mounting with 1/4"-20 (M6) Screws
  • Directly Compatible with XRN25 Series Compact Translation Stages Using 2" Wide Mating Dovetail
    • Do Not Exceed 15 in•lbs of Torque when Tightening Clamping Arm
  • XRN-A1 Adapter (Sold Separately) Enables Compatibility with XR25 and XR50 Series Translation Stages

The XRNR1(/M) Compact Rotation Stage provides 360° of continuous manual rotation and features a side-mounted fine adjuster screw which rotates the platform 8.33 mrad (0.477°) per revolution. The top plate of each stage is tapped with an array of mounting holes as illustrated in the diagrams on the right.

This stage and our other compact stages with integrated 2" wide mating dovetails can be easily stacked and secured to one another. The stages are secured by a single dovetail locking mechanism with a 3/16" (5 mm) hex. The mating dovetail also allows this stage to be used with the variety of accessories below.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
XRNR1 Support Documentation
XRNR1Ø2.21" Compact Rotation Stage with 2" Dovetail Mounting, Imperial
$437.75
Today
+1 Qty Docs Part Number - Metric Price Available
XRNR1/M Support Documentation
XRNR1/MØ56.0 mm Compact Rotation Stage with 2" Dovetail Mounting, Metric
$437.75
Today

Vertical Stage Assembly Kits

Vertical Rotation Translation Stage
Click for Details

XRNR1 Rotation Stage Mounted on XRN25P Translation Stage Using XRN-YZ Kit
Vertical Rotation Translation Stage
Click for Details

XRNR1 Rotation Stage Mounted on XRN25P Translation Stage Using XRN-XZ Kit
Vertical Rotation Stage
Click for Details

XRNR1 Rotation Stage Mounted Vertically Using XRN-XZ Kit
and XRN-B1 Baseplate
  • Kits Consist of Angle Bracket and Mounting Plate
  • Support Vertical Mounting Configurations
  • Compatible with 3" Wide Mating Dovetail Stages
    • Dovetail Clamp Screw has a Max Torque of 15 in•lbs

The XRN-XZ(/M) and XRN-YZ(/M) Assembly Kits enable vertical mounting of an XRNR1(/M) Rotation Stage. These assembly kits can be directly mounted onto a baseplate or onto our XRN25 Series Compact Translation Stages, as illustrated in the photos to the right. When used to mount the rotation stage vertically on a linear translation stage, the XRN-XZ kit positions the surface of the rotation stage parallel to the direction of linear motion, while the XRN-YZ kit would orient the rotation stage platform perpendicular to the direction of motion.

Each kit includes an angle bracket and a mounting plate. The female dovetail on the rotation stage attaches to one of the mounting plate's male dovetails. The mounting plate's other male dovetail is then mated to an arm of the angle bracket. The other arm of the angle bracket attaches to the baseplate or translation stage.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
XRN-XZ Support Documentation
XRN-XZXZ Stage Assembly Kit for Stages with 2" Wide Dovetails, 1/4"-20 Taps
$189.43
Today
XRN-YZ Support Documentation
XRN-YZYZ Stage Assembly Kit for Stages with 2" Wide Dovetails, 1/4"-20 Taps
$192.10
Lead Time
+1 Qty Docs Part Number - Metric Price Available
XRN-XZ/M Support Documentation
XRN-XZ/MXZ Stage Assembly Kit for Stages with 2" Wide Dovetails, M6 Taps
$188.91
Today
XRN-YZ/M Support Documentation
XRN-YZ/MYZ Stage Assembly Kit for Stages with 2" Wide Dovetails, M6 Taps
$192.10
Today

Rail Carriers

  • Carriers Are Removable and Provide Alternative Mounting Features
  • Compatible with 2" Wide Mating Dovetail Stages
    • Included Dovetail Clamp Screw has a Maximum Torque of 15 in•lbs

These three rail carriers expand the XRNR1(M) stage's threading options for optomechanical assemblies. A female dovetail allows each rail carrier to slide onto the XRNR1(/M) stage and connect to the stage's male dovetail. The position of the carrier can then be locked into place using a clamping mechanism [3/16" (5 mm) hex] located on one end of the carrier. This simple procedure allows the user to seamlessly swap and install different carriers on a stage in a matter of seconds.

XR25-RC3 Rail Carrier
Click to Enlarge
View Imperial Product List
Item #QtyDescription
XRNR11Ø2.21" Compact Rotation Stage with 2" Dovetail Mounting, Imperial
XRN25-RC31Fixed Stop Rail Carrier for Stages with 2" Wide Dovetails, 8-32 Taps and 1/4" Counterbored Slot
PLS-P11Ø1" Post for Polaris Mirror Mounts, One 8-32 Tap, L = 1.00"
POLARIS-K1S51Polaris® Ø1" Mirror Mount, 3 Hex Adjusters with Side Holes, Monolithic Optic Retention
KGM401Kinematic Grating Mount Adapter (Grating Height: 20-40 mm)
GR25-12041Ruled Reflective Diffraction Grating, 1200/mm, 400 nm Blaze, 25 x 25 x 6 mm
View Metric Product List
Item #QtyDescription
XRNR1/M1Ø56.0 mm Compact Rotation Stage with 2" Dovetail Mounting, Metric
XRN25-RC3/M1Fixed Stop Rail Carrier for Stages with 2" Wide Dovetails, M4 Taps and M6 Counterbored Slot
PLS-P246/M1Ø25 mm Post for Polaris Mirror Mounts, One M4 Tap, L = 24.6 mm
POLARIS-K1S51Polaris® Ø1" Mirror Mount, 3 Hex Adjusters with Side Holes, Monolithic Optic Retention
KGM401Kinematic Grating Mount Adapter (Grating Height: 20-40 mm)
GR25-12041Ruled Reflective Diffraction Grating, 1200/mm, 400 nm Blaze, 25 x 25 x 6 mm
Reflective Grating in a Polaris Mount on an XRN25-RC3 Rail Carrier Attached to an XRNR1 Stage

Note that the contact pads and steel balls embedded on the sides of the carriers do not provide additional functionality when used with the XRNR1(/M) Rotation Stage since the male dovetails on the rotation stage are less than 1" long. This prohibits multiple rail carriers from being installed on a single rotating platform. These extra features are designed for use with our XRN25 series compact translation stages.

Item # XRN25-RC1(/M) XRN25-RC2(/M) XRN25-RC3(/M)
Click Image to Enlarge XRN25 Stage Rail Carrier XRN25 Stage Rail Carrier XRN25 Stage Rail Carrier
Mounting Features #8 (M4) Counterbores (x6)
8-32 (M4) Taps (x7)
1/4" (M6) Counterbore (x1)
1/4" (M6) Counterbored Slot (x1)
8-32 (M4) Taps (x8)
1/4" (M6) Counterbored Slot (x1)
8-32 (M4) Taps (x4)
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
XRN25-RC1 Support Documentation
XRN25-RC1Rail Carrier for Stages with 2" Wide Dovetails, 8-32 Taps and #8 Counterbores
$61.53
Today
XRN25-RC2 Support Documentation
XRN25-RC2Rail Carrier for Stages with 2" Wide Dovetails, 8-32 Taps and 1/4" Counterbores
$58.35
Today
XRN25-RC3 Support Documentation
XRN25-RC3Fixed Stop Rail Carrier for Stages with 2" Wide Dovetails, 8-32 Taps and 1/4" Counterbored Slot
$55.17
Today
+1 Qty Docs Part Number - Metric Price Available
XRN25-RC1/M Support Documentation
XRN25-RC1/MRail Carrier for Stages with 2" Wide Dovetails, M4 Taps and M4 Counterbores
$61.53
Today
XRN25-RC2/M Support Documentation
XRN25-RC2/MRail Carrier for Stages with 2" Wide Dovetails, M4 Taps and M6 Counterbores
$58.35
Today
XRN25-RC3/M Support Documentation
XRN25-RC3/MFixed Stop Rail Carrier for Stages with 2" Wide Dovetails, M4 Taps and M6 Counterbored Slot
$55.17
Today

Mounting Adapters

  • XRN-A1 Adapter Enables Perpendicular Mounting of 2" Wide Dovetail Components onto 3" Wide Dovetail Components
  • XRN-A2 Adapter Enables Parallel Mounting of 2" Wide Dovetail Components onto 3" Wide Dovetail Components
  • Adapters Add 0.275" (7.0 mm) to the Overall Stacked Height of Components

These adapters enable mounting of quick-connect, crossed-roller bearing stages or accessories with a female 2" wide dovetail to components with a male 3" wide dovetail, as illustrated in the photos below. The XRN-A1 adapter enables perpendicular mounting while the XRN-A2 enable parallel mounting.

To assemble, first loosen the dovetail locking screw on the end of the top stage or accessory. Position the adapter on the bottom stage or baseplate, as illustrated in the photos below, then align the top component on the adapter. Lastly, tighten the dovetail locking screw (maximum torque: 15 in•lbs) on the end of the top component until the entire assembly is secure. Please note that the deep-set screws in the sides of the adapter are not user adjustable.

XRR1 and XRN25P Stages
Click to Enlarge

XRNR1 Compact Rotation Stage Mounted onto XR25P Translation Stage Using XRN-A1 Adapter
XRN25 Stage Adapter
Click to Enlarge

Diagram of XRNR1 Rotation Stage (Top) Mounted on XR25P Translation Stage (Bottom) Using XRN-A1 Adapter
Mounting Adapter Compatibility
Item # Orientation Top Component Bottom Component
XRN-A1 Perpendicular XRN25 Series
XRNR1 Stages
XR25 Series
XR50 Stages
XRR1 Stages
XRN-A2 Parallel
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
XRN-A1 Support Documentation
XRN-A1Perpendicular Mounting Adapter with Male 2" Wide Dovetail and Female 3" Wide Dovetail
$53.05
5-8 Days
XRN-A2 Support Documentation
XRN-A2NEW!Parallel Mounting Adapter with Male 2" Wide Dovetail and Female 3" Wide Dovetail
$105.00
Today

Stage Baseplate

Compact 25 mm Stage Mounting Plate
Click to Enlarge

Stages can be mounted vertically using a vertical assembly kit and the XRN-B1 baseplate.
  • 1.26" Long, 1/4" (M6) Counterbored Slots for Additional Mounting Flexibility
  • Orthogonal Male Dovetails for Two Stage Mounting Orientations
  • Compatible with 2" Wide Mating Dovetail Stages

The XRN-B1(/M) baseplate offers additional mounting flexibility for coarse positioning of the XRNR1(/M) rotation stage within a setup. Three 1.26" long, 1/4" (M6) counterbored slots allow for coarse translation adjustment of the stage. The orthogonal dovetails on the top of the XRN-B1 allow the stage to be mounted in two orientations. The middle slot is designed to be secured by two 1/4"-20 (M6) cap screws onto an optical table or breadboard, which allows the stage to be aligned with the table's or breadboard's hole pattern.

Vertical Stage Configuration
For situations where a vertically mounted rotation stage is needed, either the XRN-XZ or the XRN-YZ angle bracket (sold above) can be secured directly to the baseplate. This configuration is illustrated in the photo to the right and described in more detail in the Vertical Assembly Kits section above.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
XRN-B1 Support Documentation
XRN-B1Baseplate for Stages with 2" Wide Dovetails, Imperial Slot Spacing
$32.62
Today
+1 Qty Docs Part Number - Metric Price Available
XRN-B1/M Support Documentation
XRN-B1/MBaseplate for Stages with 2" Wide Dovetails, Metric Slot Spacing
$32.62
Today

Baseplates with Extended Linear Positioning


Click to Enlarge

XRNR1 Rotation Stage Mounted on XRN25DR2 Baseplate for Coarse Linear Positioning
  • Allows for Coarse Adjustment of the Stage Along the Length of the Baseplate
  • 150 mm, 250 mm, and 500 mm Lengths Available
  • Counterbored Mounting Slots Compatible with Imperial and Metric Breadboards
  • Outer Dovetail Compatible with 2" Wide Mating Dovetail Stages
  • Additional Dovetail Compatible with 34 mm Rail Accessories

These extended baseplates provide a convenient way to mount and reposition our XRNR1(/M) Rotation Stage on a breadboard or optical table. Each baseplate features an outer male dovetail for mounting the stage, as shown in the image to the right, and an inner 34 mm male dovetail for mounting other clamps and platforms.

A mounted component can be coarsely translated across the entire length of the baseplate. The XRN25DR2, XRN25DR, and the XRN25DR3 come in lengths of 150 mm, 250 mm, and 500 mm, respectively. The graduated scale engraved along one edge of each baseplate makes it easy to repeat adjustments between multiple locations on the baseplate; the XRN25-RC3 rail carriers sold above can be used to mark a specific location on the baseplate before moving the stage.

The baseplates feature 1" long 1/4" (M6) counterbored mounting slots and a central 1/4" (M6) counterbored mounting hole that allow the rail to be used with both imperial and metric breadboard hole patterns. Standard cap screws can be used with this baseplate without interrupting the translation of mounted components.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
XRN25DR2 Support Documentation
XRN25DR2Extended Dovetail Baseplate for Stages with 2" Wide Dovetails, 150 mm
$72.10
Today
XRN25DR Support Documentation
XRN25DRExtended Dovetail Baseplate for Stages with 2" Wide Dovetails, 250 mm
$80.34
Today
XRN25DR3 Support Documentation
XRN25DR3Extended Dovetail Baseplate for Stages with 2" Wide Dovetails, 500 mm
$123.60
Today

Clamping Arms


Click for Details

Mechanical Drawings
  • Provide Clamping Force for Our Platform Mounts
  • Threaded Hole on Top and Threaded Stud on Bottom of Post
    • 6-32 Threads on PM3 and PM4
    • 8-32 Threads on PM5
    • M4 Threads on All Metric Versions
  • Maximum Optic Heights from 0.97" to 1.65" (24.6 mm to 41.8 mm)
  • Extension Posts Available to Increase Max Optic Height
    • PM3SP(/M) with PM3(/M): Hold Optics up to 2.21" (56.1 mm) Tall
    • PM4SP(/M) with PM4(/M): Hold Optics up to 3.61" (91.7 mm) Tall

Click to Enlarge

Clamping Arm Extension Posts with Metric Indicator Groove

Thorlabs' Clamping Arms provide clamping force to secure optics to our kinematic platform mounts, stages, and V-clamps. The PM3(/M) accommodates optics up to 0.97" tall and features a 0.69" center-to-center distance between the post and the nylon-tipped setscrew that holds the optic. The PM4(/M) accommodates optics up to 1.61" and features a 1.16" center-to-center distance between the post and the nylon-tipped setscrew. The maximum optic height of the PM3(/M) or PM4(/M) Clamping Arms can be extended using our PM3SP(/M) or PM4SP(/M) Extension Posts, respectively. These extension posts are identical to the posts included in each complete clamping arm. Each clamping arm features 6-32 (M4) threads. The PM3 and PM4 can be mounted in 8-32 tapped holes by using the AS6E8E thread adapter, which features internal 6-32 threads and external 8-32 threads. This thread adapter has an outer diameter of 0.24", which is the same as the PM4SP extension post and the post included with the PM4 clamping arm. This allows the clamping arm to be adjusted across the seam between either post and the adapter. The smaller diameters of the included post for the PM3 clamping arm and the PM3SP extension post cause the thread adapter to act as a stop for the clamping arm.

The PM5(/M) clamping arm is made entirely from heat-treated stainless steel, which helps maintain stability in fluctuating temperatures and provides vacuum compatibility. This clamping arm is recommended for use with the POLARIS-K1M4(/M), but it can be used with any platform mount or stage that has one or more 8-32 (M4) tapped holes. The PM5(/M) can hold optics up to 1.65" tall, and the distance from the post center to the contact point that holds the optic is 0.90".

Each clamping arm is attached to its post using a flexure mechanism that locks with a 5/64" (2.0 mm) balldriver or hex key. The setscrew on top of the clamping arm also accepts a 5/64" (2.0 mm) balldriver or hex key in order to clamp down on the optic. The post includes a through hole which can be leveraged for added torque when tightening down the post. Please see the diagram above for additional information.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
PM3 Support Documentation
PM3Small Adjustable Clamping Arm, 6-32 Threaded Post
$19.91
Today
PM3SP Support Documentation
PM3SPCustomer Inspired! Extension Post for PM3 Clamping Arm, 6-32 Threaded
$5.52
Today
PM4 Support Documentation
PM4Large Adjustable Clamping Arm, 6-32 Threaded Post
$24.35
Today
PM4SP Support Documentation
PM4SPCustomer Inspired! Extension Post for PM4 Clamping Arm, 6-32 Threaded
$5.52
Today
PM5 Support Documentation
PM5Stainless Steel Adjustable Clamping Arm, 8-32 Threaded Post
$60.47
Today
+1 Qty Docs Part Number - Metric Price Available
PM3/M Support Documentation
PM3/MSmall Adjustable Clamping Arm, M4 Threaded Post
$19.91
Today
PM3SP/M Support Documentation
PM3SP/MCustomer Inspired! Extension Post for PM3/M Clamping Arm, M4 Threaded
$5.52
Today
PM4/M Support Documentation
PM4/MLarge Adjustable Clamping Arm, M4 Threaded Post
$24.35
Today
PM4SP/M Support Documentation
PM4SP/MCustomer Inspired! Extension Post for PM4/M Clamping Arm, M4 Threaded
$5.52
Today
PM5/M Support Documentation
PM5/MStainless Steel Adjustable Clamping Arm, M4 Threaded Post
$60.47
Today
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