SM2-Compatible Translation Mounts

  • 2.035"-40 Threading
  • Mount SM2 Lens Tubes
  • Mount Ø2" (Ø50 mm) Optics




Application Idea

CXY2A and SM2 Lens Tube
Mounted in a 60 mm
Cage System

Related Items

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This page is a compilation of all of Thorlabs' SM2 (2.035"-40) threaded translation mounts in order to allow for the quick selection of a translation mount if SM2 threading is a primary requirement. Thorlabs also has similar compilations of SM threaded translation mounts for Ø1/2" (12.7 mm) and Ø1" (25 mm) optics. If SM threading is not a primary requirement for the translation mount, consider using the manual or motorized translation mount navigation menus.

Posted Comments:
florian.b.bayer  (posted 2017-09-13 13:55:26.223)
Most of Thorlab components are made from non-magnetic materials, as is the SPT2/M. Unfortunatelly the two springs within are very magnetic and develop quite a lot of pulling force near a 10 Tesla split coil system. It would be nice to have non-magnetic springs for this part.
tfrisch  (posted 2017-09-21 11:56:47.0)
Hello, thank you for contacting Thorlabs. I will reach out to you about potential solutions for aligning optics in magnetic fields.
bdada  (posted 2011-04-07 16:35:00.0)
Response from Buki at Thorlabs: Thank you for your feedback. We have updated our website to show the accurate travel range of +/- 1mm.
nizamov.shawkat  (posted 2011-04-07 12:41:34.0)
Catalog page says +/- 1 mm of travel. Here it is mentioned to be +/- 2 mm. Which is correct?
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Post-Mountable SM2-Threaded XY Translator

  • Designed to Center Ø2" (50 mm) Optics in a Beam Path
  • High Resolution Adjusters Provide 250 µm/rev for Micron Sensitivity
  • SM2 (2.035"-40) Threads Compatible with Our Extensive Selection of SM2 Lens Tubes
  • Tip/Tilt Deviation: <100 µrad
  • Max Optic Thickness: 12 mm
  • Bottom-Located 8-32 (M4) Tap Enables Direct Mounting to a Ø1/2" Post

This mount utilizes two M3 x 0.25 fine adjustment screws to provide ±1 mm of travel along both axes perpendicular to the optical axis. These adjuster screws provide 250 µm of travel per revolution and include a 5/64" hex socket on the back-end of each screw. This enables the use of a hex key, which will provide a better feel than the thumb screw knob when making small incremental movements. The mounting bore for the optic is SM2 (2.035"-40) threaded, which makes the mount compatible with SM2 lens tubes and other SM2-threaded components. The optic is held in the mount using the included SM2RR retaining ring.

Please note that the moving SM2-threaded world may be manually rotated and may also rotate during translation.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
LM2XY Support Documentation
LM2XYCustomer Inspired! Translating Lens Mount for Ø2" Optics, 1 Retaining Ring Included
Lead Time
+1 Qty Docs Part Number - Metric Price Available
LM2XY/M Support Documentation
LM2XY/MCustomer Inspired! Translating Lens Mount for Ø2" Optics, 1 Retaining Ring Included, Metric
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XY Translator for 60 mm Cage Systems

  • Accepts Ø2.00" (Ø50.8 mm) Optics Up to 0.59" (15.0 mm) Thick
  • ±2.0 mm Travel in X and Y without Rotation
  • 3/16"-100 Lockable Adjusters

The CXY2A XY Translator provides ±2.0 mm of travel perpendicular to the optical axis in a 60 mm cage system. The moveable carriage is internally SM2 (2.035"-40) threaded and accepts Ø2" optics up to 0.59" (15.0 mm) thick when secured using the included SM2RR retaining ring. Thicker optics can be mounted into an SM2 lens tube, which then may be attached to the front of the translator. The fixed backside is also SM2 threaded to allow SM2 lens tubes to be attached. While the mount features a non-rotating center carriage, the mount does feature horizontal and vertical tick marks to ensure proper alignment of the moveable carriage.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
CXY2A Support Documentation
CXY2A60 mm Cage System Translating Lens Mount for Ø2" Optics
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XY Slip Plate Positioner for 60 mm Cage Systems

  • ±2 mm of X and Y Manual Adjustment
  • Lockable Design
  • Center-Located SM2 (2.035"-40) Internal Threading
  • Tapped Mounting Hole
  • 60 mm Cage System and SM2 Lens Tube Compatible

The SPT2C(/M) Slip Plate Positioner is designed to provide coarse XY positioning of Ø2" optical components within our 60 mm cage assembly system. The SM2-threaded bore can mount optics up to 0.30" (7.6 mm) thick using two SM2RR retaining rings (included). This design provides manual adjustments of ±0.079" (±2 mm) of travel and is best utilized in conjunction with an alignment laser to monitor the centricity. The images below detail how to adjust and lock the SPT2C(/M). 

SPT2 Adjustment: Step 3
Click to Enlarge

While continuing to hold the plate in the proper position, use the 5/32" (4.0 mm) balldriver to lock the locking hex screws.
SPT2 Adjustment: Step 2
Click to Enlarge

Once the locking hex screws are unlocked, manually adjust the slip plate to the desired location in the X and Y directions.
SPT2 Adjustment: Step 1
Click to Enlarge

The photo above shows the SPT2C mounted within a cage system, with the slip plate centered. To begin adjustment, use a 5/32" (4.0 mm) balldriver to loosen the two locking hex screws (visible in the photo above).
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SPT2C Support Documentation
SPT2CNEW!Coarse ±2 mm Slip Plate Positioner for 60 mm Cage System
+1 Qty Docs Part Number - Metric Price Available
SPT2C/M Support Documentation
SPT2C/MNEW!Coarse ±2 mm Slip Plate Positioner for 60 mm Cage System, Metric
Lead Time
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6-Axis Kinematic Mount for Ø2" Optics

6-Axis kinematic mount usage. Note that while this animation shows the K6XS
mount for Ø1" optics, the operation of the K6X2 is analogous.
  • Six Adjustment Axes with Locks
    • Kinematic Pitch/Yaw: ±2° at 3.6 mrad/rev
    • X and Y Translation: ±2 mm at 254 µm/rev
    • Z Translationa: ±0.13" (±3.2 mm) at 318 µm/rev
    • Continuous 360° Roll Control with 1° Graduations
  • Independent X, Y, and Roll Adjustment
  • SM2-Threaded Bore for Ø2" (50 mm) Optics up to 0.53" (13.4 mm) Thick
  • Six #8 (M4) Counterbores for Post Mounting

The K6X2 6-Axis Kinematic Optic Mount is designed as a general-purpose, high-precision positioner. The optic cell can be translated along or rotated about 6 axes, and each axis has a locking screw for stability. The mount uses 1/4"-80 adjuster screws for pitch, yaw, and z-axis adjustment, and 3/16"-100 adjuster screws for x- and y-axis adjustment.

The translating cell has SM2 (2.035"-40) threading for attaching Ø2" lens tubes or mounting Ø2" (50 mm) optics up to 0.53" (13.4 mm) thick using the included SM2RR Retaining Ring, which can be tightened using an SPW604 Spanner Wrench (sold separately). In testing, the X and Y axes of the K6X2 caused less than ±35 µm of crosstalk. If higher adjustment resolution is desired for pitch, yaw, or z-translation, the three 1/4"-80 adjusters can be replaced with DAS110 Differential Adjusters.  

For more information on our 6-axis kinematic mounts, including versions for Ø1/2" and Ø1" optics, see our full web presentation.

  • Z-axis translation is accomplished by turning all three tip/tilt adjusters equally in the same direction.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
K6X2 Support Documentation
K6X2Customer Inspired! 6-Axis Locking Kinematic Mount for Ø2" Optics