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SM1 Threads to Optomechanical Component Adapters


  • Integrate Standard Optomechanical Components with Thorlabs' SM1 Thread Standard
  • External SM1 (1.035"-40) Threads
  • Internal Screw Threads or Counterbore

SM1A62

External SM1 Threads to Internal 1/4"-20 Threads

SM1A65

External SM1 Threads to Internal 8-32 Threads

SM1A64

External SM1 Threads to

1/4" Counterbore

SM1A67

External SM1 Threads to

#8 Counterbore

Related Items


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Optic Storage
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View Imperial Product List
Item #QtyDescription
OC2SM11Lid for Objective Case, Internal SM1 (1.035"-40) Threads
SM1A651Adapter with External SM1 Threads and Internal 8-32 Threads, 0.23" Thick
POLARIS-C1G1Polaris Ø1" Glue-In Fixed Mount, Optimized for Mirrors
BB1-E021Ø1" Broadband Dielectric Mirror, 400 - 750 nm
OC221Canister for Objective Case, Fits Objectives up to 50 mm Long (Lid Not Included)
View Metric Product List
Item #QtyDescription
OC2SM11Lid for Objective Case, Internal SM1 (1.035"-40) Threads
SM1A661Adapter with External SM1 Threads and Internal M4 x 0.7 Threads, 5.7 mm Thick
POLARIS-C1G1Polaris Ø1" Glue-In Fixed Mount, Optimized for Mirrors
BB1-E021Ø1" Broadband Dielectric Mirror, 400 - 750 nm
OC221Canister for Objective Case, Fits Objectives up to 50 mm Long (Lid Not Included)
The SM1A65 adapter is being used to secure a glue-in Polaris mount in an objective case.

Features

  • External SM1 (1.035"-40) Threading
  • Internal 1/4"-20 (M6) or 8-32 (M4) Threading
  • 1/4" (M6) or #8 (M4) Counterbore
  • Compatible with the SPW909 and SPW801 Spanner Wrenches

These anodized aluminum adapters feature external SM1 (1.035"-40) threading, spanner wrench slots, and internal threads or a counterbore that is compatible with many of our optomechanical components. This allows standard 1/4"-20 and 8-32 optomechanics, such as post assemblies and mounts, to be integrated with Thorlabs' components that incorporate our SM1-thread standard, such as our Ø1" lens tube systems. These adapters can also be used to store various optical components in a storage case by utilizing the SM1 threading included in the OC2SM1. An example of this can be seen to the right, where an SM1A65 is being used to secure a POLARIS-C1G glue-in mount for storage in the OC22 canister.

Thorlabs' Threading Specifications

Thorlabs' lens tubes utilize a series of non-standard threadings. Threading specifications are given below for our SM threadings utilized in our lens tube and cage system components so that you can machine mating components to suit your application. We also offer products with C-Mount and RMS threadings, and the specifications for these threadings are also given below. Please note that other manufacturers may have different tolerances for these threads. For other thread specifications that are not listed here, please contact Tech Support.

SM05 Threading: Ø1/2" Lens Tubes, 16 mm Cage Systems
External Thread, 0.535"-40.0, UNS-2A Internal Thread, 0.535"-40.0, UNS-2B
Max Major Diameter 0.5340" Min Major Diameter 0.5350"
Min Major Diameter 0.5289" Min Pitch Diameter 0.5188"
Max Pitch Diameter 0.5178" Max Pitch Diameter 0.5230"
Min Pitch Diameter 0.5146" Min Minor Diameter (and 83.3% of thread) 0.508"
Max Minor Diameter 0.5069" Max Minor Diameter (and 64.9% of thread) 0.514"
RMS Threading: Objective, Scan, and Tube Lenses
External Thread, 0.800"-36.0, UNS-2A Internal Thread, 0.800"-36.0, UNS-2B
Max Major Diameter 0.7989" Min Major Diameter 0.8000"
Min Major Diameter 0.7934" Min Pitch Diameter 0.7820"
Max Pitch Diameter 0.7809" Max Pitch Diameter 0.7866"
Min Pitch Diameter 0.7774" Min Minor Diameter (and 83.3% of thread) 0.770"
Max Minor Diameter 0.7688" Max Minor Diameter (and 64.9% of thread) 0.777"
C-Mount Threading: Machine Vision LensesCCD/CMOS Cameras
External Thread, 1.000"-32.0, UN-2A Internal Thread, 1.000"-32.0, UN-2B
Max Major Diameter 0.9989" Min Major Diameter 1.0000"
Min Major Diameter 0.9929" Min Pitch Diameter 0.9797"
Max Pitch Diameter 0.9786" Max Pitch Diameter 0.9846"
Min Pitch Diameter 0.9748" Min Minor Diameter (and 83.3% of thread) 0.966"
Max Minor Diameter 0.9651" Max Minor Diameter (and 64.9% of thread) 0.974"
SM1 Threading: Ø1" Lens Tubes, 30 mm Cage Systems
External Thread, 1.035"-40.0, UNS-2A Internal Thread, 1.035"-40.0, UNS-2B
Max Major Diameter 1.0339" Min Major Diameter 1.0350"
Min Major Diameter 1.0288" Min Pitch Diameter 1.0188"
Max Pitch Diameter 1.0177" Max Pitch Diameter 1.0234"
Min Pitch Diameter 1.0142" Min Minor Diameter (and 83.3% of thread) 1.008"
Max Minor Diameter 1.0068" Max Minor Diameter (and 64.9% of thread) 1.014"
SM30 Threading: Ø30 mm Lens Tubes
External Thread, M30.5x0.5 Internal Thread, M30.5x0.5
Max Major Diameter 30.480 mm Min Major Diameter 30.500 mm
Min Major Diameter 30.371 mm Min Pitch Diameter 30.175 mm
Max Pitch Diameter 30.155 mm Max Pitch Diameter 30.302 mm
Min Pitch Diameter 30.059 mm Min Minor Diameter (and 83.3% of thread) 29.959 mm
Max Minor Diameter 29.938 mm Max Minor Diameter (and 64.9% of thread) 30.094 mm
SM1.5 Threading: Ø1.5" Lens Tubes
External Thread, 1.535"-40, UNS-2A Internal Thread, 1.535"-40, UNS-2B
Max Major Diameter 1.5339" Min Major Diameter 1.535"
Min Major Diameter 1.5288" Min Pitch Diameter 1.5188"
Max Pitch Diameter 1.5177" Max Pitch Diameter 1.5236"
Min Pitch Diameter 1.5140" Min Minor Diameter (and 83.3% of thread) 1.508"
Max Minor Diameter 1.5068" Max Minor Diameter (and 64.9% of thread) 1.514"
SM2 Threading: Ø2" Lens Tubes, 60 mm Cage Systems
External Thread, 2.035"-40.0, UNS-2A Internal Thread, 2.035"-40.0, UNS-2B
Max Major Diameter 2.0338" Min Major Diameter 2.0350"
Min Major Diameter 2.0287" Min Pitch Diameter 2.0188"
Max Pitch Diameter 2.0176" Max Pitch Diameter 2.0239"
Min Pitch Diameter 2.0137" Min Minor Diameter (and 83.3% of thread) 2.008"
Max Minor Diameter 2.0067" Max Minor Diameter (and 64.9% of thread) 2.014"
SM3 Threading: Ø3" Lens Tubes
External Thread, 3.035"-40.0, UNS-2A Internal Thread, 3.035"-40.0, UNS-2B
Max Major Diameter 3.0337" Min Major Diameter 3.0350"
Min Major Diameter 3.0286" Min Pitch Diameter 3.0188"
Max Pitch Diameter 3.0175" Max Pitch Diameter 3.0242"
Min Pitch Diameter 3.0133" Min Minor Diameter (and 83.3% of thread) 3.008"
Max Minor Diameter 3.0066" Max Minor Diameter (and 64.9% of thread) 3.014"

Posted Comments:
cbrideau  (posted 2018-04-17 10:22:20.22)
Would be nice to see this for SM2 sizes, as then a whole mount could be screwed into the port on a 60mm cage cube and angularly positioned. An external lock nut could prevent rotation.
YLohia  (posted 2018-04-18 10:34:52.0)
Hello, thank you for your feedback. I have posted this idea to our internal engineering forum so it can be considered for a future product release. Currently, you can use the SM2A6 external SM2 to internal SM1 adapter to mate the adapters on this page to any internally SM2 threaded port.

Adapters with External SM1 (1.035"-40) and Internal Component Threads

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SM1A65 Support Documentation
SM1A65Adapter with External SM1 Threads and Internal 8-32 Threads, 0.23" Thick
$15.91
Today
SM1A62 Support Documentation
SM1A62Adapter with External SM1 Threads and Internal 1/4"-20 Threads, 0.33" Thick
$15.91
Today
+1 Qty Docs Part Number - Metric Price Available
SM1A66 Support Documentation
SM1A66Adapter with External SM1 Threads and Internal M4 x 0.7 Threads, 5.7 mm Thick
$15.91
Today
SM1A63 Support Documentation
SM1A63Adapter with External SM1 Threads and Internal M6 x 1.0 Threads, 8.3 mm Thick
$15.91
Today

Adapters with External SM1 (1.035"-40) to Counterbored Through Hole

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
SM1A67 Support Documentation
SM1A67Adapter with External SM1 Threads and #8 (M4) Counterbore, 0.23" Thick
$15.91
Today
SM1A64 Support Documentation
SM1A64Adapter with External SM1 Threads and 1/4" (M6) Counterbore, 0.33" Thick
$15.91
Today
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