Adjustable-Height V-Clamp for Optics

  • Securely Mounts Optics Ranging from Ø1/2" (13 mm) to Ø3.5" (89 mm)
  • Locking Screw with V-Shaped Swivel Head Provides Clamping Force
  • Simple One-Handed Operation

‘V’ Clamping Screw with Swivel Head

8-32 (M4) Tapped Hole

VG100 Shown Holding a Ø1" Plano-Convex Lens

Application Idea


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  • Mounts Optics Ranging from Ø1/2" (Ø13 mm) to Ø3.5" (Ø89 mm)
  • Optic Groove 0.28" (7 mm) Wide
  • V-Clamp Design Firmly Secures Optic
  • Simple One-Handed Operation

This easy-to-operate optic clamp securely holds optics ranging in size from Ø1/2" (Ø13 mm) to Ø3.5" (Ø89 mm) up to 0.28" (7 mm) thick. The guillotine operation of the top plate allows for quick height adjustment for varying sized optics. Conveniently located in the top plate is a fastening screw with a swiveling V-shaped Delrin®* tip that provides locking force to the optic. The post-mountable base is machined with a dual-action V-groove for extra stability. The overall thin profile of the mount makes it ideal for compact optomechanical structures. For holding optical components thicker than 0.28" (7 mm), please consider one of our other V-Mounts.

*Delrin is a registered trademark of DuPont Polymers, Inc.

Posted Comments:
Jakob Birkhölzer  (posted 2022-11-10 10:22:11.917)
I purchased this item. The construction seems to me not completely metric. I measured the clamping screw because i plan to make a second tapped bore for it. It seems to me it is not M5 but #10-32 UNF as read from the STP file. I would appreciate if this was made clear also in the item description. When i puchase a "metric" part, i assume ALL the threads are metric.
cdolbashian  (posted 2022-11-16 11:34:31.0)
Thank you for reaching out to us Jakob. I am sorry for the misunderstanding. For all of our metric vs imperial parts on our website, the differences are minor. Typically the changes are limited to the spacing and threading of mounting holes. As you assessed, the thread is indeed #10-32-2B UNF. We have some information here regarding the differences between our metric and imperial components:
yoav.romach  (posted 2017-02-27 19:40:14.303)
Is it possible to have an even larger version of this item? We have a 100mm round optic...
jlow  (posted 2017-02-27 11:42:53.0)
Response from Jeremy at Thorlabs: We have the LMR100(/M), which can be found at, to mount 100mm optic.
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Adjustable-Height V-Clamp for Optics

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
VG100 Support Documentation
VG100Adjustable-Height Optics Clamp
+1 Qty Docs Part Number - Metric Price Available
VG100/M Support Documentation
VG100/MAdjustable-Height Optics Clamp, Metric