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Ø1/2" Universal Post Holders
Magnets in Base Provide Holding
Universal Post Holder Features
Thorlabs' Ø1/2" Universal Post Holders simplify the task of mounting a Ø1/2" optical post on an optical table or breadboard. These post holders incorporate a swiveling base, allowing a choice between multiple mounting holes on the breadboard. Magnets in the bottom of the base aid in rough alignment prior to final positioning. Additionally, the base is hollow, which allows the post to rest on the optical table and enables maximum height adjustment.
These Universal Post Holders have been designed with the same key features of our popular Standard Post Holders. They feature and extra wide square relief cut machined vertically along the length of the part, as shown in the drawing to the right. This channel provides a highly-stable two-line contact between the post and post holder. Other post holder designs that do not have a relief cut provide less holding power, which leads to a downward drift in the post's position with time. Each post holder comes with a 3/16" (5 mm) hex spring-loaded thumbscrew. Additional quantities can be purchased separately below.
Our line of Universal Post Holders offers several convenient features that make it easy to construct a new assembly. The swiveling base allows you to place your optic mount at the desired location and then simply swivel the base until it lines up with a convenient mounting hole on the optical table. Additionally, the post holder base is equipped with magnets that provide holding force for rough optic alignment prior to final lockdown. For additional height adjustment, the hollow base allows a Ø1/2" Post to rest upon the optical table, allowing the largest range of height adjustment of the post. These post holders are equipped with a TS25H(/M) 3/16" (5 mm) drive spring-loaded hex locking thumbscrew. This thumbscrew should not be tightened beyond the maximum torque of 28 in·lbs (3.2 N·m). Popular post holders are also available in packages of five for ease of ordering.
To order these post holders without magnets, please contact Tech Support.
Click to Enlarge
Exploded View of the TS25H Thumbscrew
The TS25H has 1/4"-20 threads while the TS6H/M has M6 x 1.0 threads for compatibility with our imperial and metric Ø1/2" post holders, respectively. The recommended maximum torque is 28 in·lbs (3.2 N·m). Please note that we do not recommend using an L wrench to tighten the thumbscrew, as this may break off the screw head.
If a thumbscrew without a spring-loaded tip is preferred, we recommend our vacuum-compatible thumbscrews. Alternatively, the tips can be removed from these thumbscrews by unthreading the setscrew in the front of the thumbscrew with a 1/16" (1.5 mm)
For ease of ordering, these thumbscrews are available individually or in packages of five.
Our 360° swivel base adapter adds the swivel and magnetic retention functionality of our universal post holders to our standard Ø1/2" post holders. This allows users to minimize the amount of time it takes to assemble an optical system. In addition, the swivel design is ideal for applications that require a large number of components to be packed into a small area. Please note that this anodized aluminum adapter does not offer the same height flexibility of the universal post holders above, which allow the post to be lowered all the way to the table.