Posts and Holders

Posts and Holders

Posts, (Or Rods), provide a simple means for mounting optical components. These posts are 1/2 inch in diameter and incorporate precision machined features which make them more convenient to use. Half inch diameter stainless steel posts are machined with a 1/4-20 or M6 female thread on one end and an 8-32 or M4 female thread on the other. They may be stud mounted to a wide variety of component holders. A 4mm clearance hole through the middle of the post provides for the use of a torque bar for tightening. Post collars are offered separately to hold the posts at a preset height. Post holders are made from aluminum and are equipped with a spring-loaded clamp screw to hold the post in position. The base of the post holders is fitted with a 1/4-20 or M6 female thread for attachment to a variety of bases. An adjustable height post holder provides 10mm of vertical adjustment which is actuated by the rotation of a knurled ring.

  • Aluminum 12.7-mm Post Holders

    Description

    Aluminum post holders one of the most widely used components on an optical table and, along with optical posts, bases, and mounts, are the key element to setting up and optical lab experiment. They provide manual height adjustment as well as  manual yaw adjustment. Our PHV-series post holders are made from aircraft-grade aluminum alloy and are designed to mount to standard M6 or 1/4-20 optical tables. The inner diameter is sized for standard 12.7-mm (1/2-in.) optical posts and provides stable, 3-point clamping for excellent kinematic stability. The clamping knob has a spring-loaded Delrin™ tip to ensure smooth fine adjustment of the post, prior to clamping. To make it easier to identify the post-holder heights, all but the shortest post have graduated scribe-lines at 25-mm intervals around the circumference. The PHV post holders also feature an additional threaded clamp-knob hole for better adjustment accessibility when large platforms are post mounted.   If one of our many catalog post holders does not meet your requirements, just send us a request for a custom version. 

  • Stainless Steel 12.7-mm Post Holders With Pedestal Base

    Description

    The PHX series 1/2-in. post holders are made from stainless steel and mount with pedestal-style bases. The body, base, and knob are all made from passivated 300-series stainless steel, providing additional stiffness and lower thermal expansion compared to aluminum. Additionally, the stainless steel makes them suitable for applications in UV wavelengths. The pedestal base has industry-standard dimensions making it compatible with all standard clamping forks. The inner diameter is sized for standard 12.7-mm (1/2-in.) posts and provides stable, 3-point kinematic clamping. The PHX post holders also feature an additional threaded clamp-knob hole for better adjustment accessibility when large platforms are post mounted.   If one of our many catalog post holders does not meet your requirements, send us a request for a version

  • Other 12.7-mm Post and Post Holders

    Description

    OptoSigma provides more 1/2-in.  post holder options than just the basics.  Here, there are modular post holders with removable bases which allow the user to remove the post-held item from the setup and then return it to the exact same location.  Also included here are adjustable-height post holders which employ a helical thread similar to what is used on a zoom lens. It provides rapid but smooth vertical translation of the post

  • Specialty 6-, 12-, and 20-mm Posts and Post Holders

    Description

    Our specialty post holders are the original optomechaincal components typically used in Japan.  These posts and post holders are in non-imperial sizes only: 6mm, 12mm, and 20mm.  They have the threaded stud machined into the post rather than it being a separate part.  The post holder is also a slightly different design than the current US or EU standard.  The material for these post holders either solid brass aluminum or stainless steel (vacuum compatible).  Additionally, the internal diameter on the brass post holders is not the typical double-bored type with the  kinematic "bumps". Rather, it is a single-bored high-tolerance slip-fit hole.  It's such a tight fit, air has difficulty escaping when the post in inserted in.  These products can be used on optical tables but keep in mind that the mounting thread is an M16x1 and the posts will not be compatible with the typical US or EU 12.7mm post diameter standard.  

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