Features

Precision Ground Nonmagnetic Stainless Steel
Available Diameters: 1/2", 12.7 mm, and 12 mm
Bottom-Located 1/4"-20 (M6) Tapped Hole
Top-Located 8-32 (M4) Removable Stud
Available in a Variety of Lengths Ranging from 0.75" (20 mm) to 12" (300 mm)
Graduated Posts Aid Optic Alignment
Ø12 mm Versions for our Japanese Customers (See -JP Item Numbers Below)

Thorlabs’ solid stainless steel posts are a basic building block required in most rigid constructions. The precision-ground Ø1/2" (12.7 mm) posts, which are fabricated from nonmagnetic 303 stainless steel, are compatible with our Ø1/2" post holders and construction accessories. A bottom-located 1/4"-20 (M6) tapped hole and top-located 8-32 (M4) removable mounting stud provide compatibility with virtually all of our optic mounts. The 8-32 (M4) removable stud provides additional flexibility by allowing 8-32 (M4) cap screws to be used with our universal mounts. For convenience, a Ø1/8” hole is provided to slip a 5/64" (2.5 mm) balldriver through the post for extra leverage when tightening components. A wide range of post lengths is available, ranging from 0.75” (20 mm) to 12” (300 mm).

Thorlabs offers a line of adapters and accessories which increase the usability of these posts; please see our complete line of Ø1/2" Posts Assemblies for more information.

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Posted Comments:

Poster: cdaly

Posted Date: 2012-11-30 16:23:33.093

Response from Chris at Thorlabs: Thank you for using our feedback feature. We are unable to provide 2010 SolidWorks files directly as the version we use for design (2012) restricts us from creating backwards compatible files, but we do have Step files available for download as well. These files can be opened in SolidWorks 2010 and then saved as an .sldprt file, which will give you the format you require.

Poster: xiaoqiang026403

Posted Date: 2012-11-29 02:12:56.95

I use SolidWorks 2010,but some of your products' Drawing and Documents (SolidWorks) are opened by SolidWorks 2012. Could you send the SolidWorks Documents in version 2010?

Poster: tcohen

Posted Date: 2012-05-22 12:32:00.0

Response from Tim at Thorlabs: Our standard 1/2" Diameter Stainless Steel Optical Posts are machined to a diameter of .499" +.000" -.002".

Poster: ygan1129

Posted Date: 2012-05-21 15:14:28.0

What are the tolerances on the diameter of the posts?

Poster: tcohen

Posted Date: 2012-02-27 11:03:00.0

Response from Tim at Thorlabs: Thank you for your feedback. There are different mounting methods and so your part list will depend on your preferred setup. I have contacted you directly to discuss your options.

Poster: ahmadvand

Posted Date: 2012-02-27 02:32:19.0

Dear Thorlabs; I want to buy below parts for my university. Unfortunatly, I can not choose relevant optomechanic parts, due to the different options. It would be very appreciated if you give me a complete optomechanic list(post, post holder, lens mount, mirror mount, polarizor mount, laser mount) for constructing a setup with the below parts. Best Regards Hossein Ahmadvand Parts: - HNL050L-EC - HeNe Laser, 632.8 nm, 5 mW, Polarized, 220 VAC - GTH10M-A - Mounted Glan Thompson Calcite Polarizer, 10 mm x 10 mm Clear Aperture, 350 - 700 nm AR Coating - LPVISB050-MP - Ø12.5 mm SM05-Mounted Linear Polarizer, VIS B (500 - 720 nm) - DET36A/M - Si Detector, 350-1100 nm, 14 ns Rise Time, 13 mm2, Metric - DET10A/M - Si Detector, 200-1100 nm, 1 ns Rise Time, 0.8 mm2, Metric - CM1-PBS252 - Cube-Mounted Polarizing Beamsplitter, 620 - 1000 nm - MC2000 - Optical Chopper System with MC1F10 10-slot (36°) Chopper Blade - MC1F100 - 100 Slot Blade for Optical Chopper, 250 Hz - 10kHz - PF05-03-P01 - Ø1/2" (Ø12.7 mm) Protected Silver Mirror, 0.24" (6.0 mm) Thick - BB05-E02 - Ø1/2" Broadband Dielectric Mirror, 400-750 nm - LB4915 - f = 50.0 mm, Ø1/2" UV Fused Silica Bi-Convex Lens, Uncoated

Poster: bdada

Posted Date: 2012-02-02 18:54:00.0

Response from Buki at Thorlabs: Thank you for using our feedback forum. We understand that it may not always be convenient to adjust the height of the post within the post holder. We have passed on your suggestion to our design team and we will consider it as we continue to expand our selection of posts. Please contact TechSupport@thorlaabs.com if you have any questions.

Poster:

Posted Date: 2012-02-02 15:37:56.0

I would like to see 2.5" tall posts offered. The gap from 2" to 3" can be critical and hard to fill without a post size in between.

Poster: klee

Posted Date: 2009-12-03 10:46:47.0

A response from Ken at Thorlabs to eoconnor: The tolerance on the length of the post is ±0.005".

Poster: eoconnor

Posted Date: 2009-12-02 21:22:32.0

Can you please give me the tolerance on the length of the post? Thank you!

Poster: Laurie

Posted Date: 2009-01-12 18:46:24.0

Response from Laurie at Thorlabs to wenzao_li: All of the documentation for the product line can be found by clicking on the "Drawings & Documents" Tab on this page. If you experience problems with any of the files, please let us know.

Poster: wenzao_li

Posted Date: 2009-01-12 18:08:13.0

The drawings are missing on this web page http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=1266

Poster: Tyler

Posted Date: 2008-04-09 14:29:12.0

Response from Tyler at Thorlabs: Thank you for the product feedback on the 2.5 mm hole on the post that is used for tightening. I will forward this comment to our product engineers so that they can consider this when designing any future post or post holder products.

Poster:

Posted Date: 2008-04-09 12:31:33.0

The 5/64" (2.5mm) hole is always getting caught in the post holder. This can be somewhat irritating. However, I do like the ability to tighten something down without damaging the outside shank.

Poster: technicalmarketing

Posted Date: 2008-02-08 11:00:42.0

If you are looking for a 12.5 mm diameter post with M4 taps on both ends, you have two options: (1)You can purchase one of our TR series posts and an AS4M6M adapter, which will allow you to switch from the internal M6 threading on the one side of the post to internal M4 threads. (2) Contact our technical support staff (techsupport@thorlabs.com) and request a quote for a custom TR post with M4 taps on both ends.

Poster: hholst-pedersen

Posted Date: 2008-02-08 10:14:39.0

Hi! I need more Ø 12,5mm posts with #8-32 (m4) tapped holes in both top and base. Where can I find that? I only find Ø1/2" posts with #8-32 tapped hole in top and #4-40 in base! Best regards, Hege Holst-Pedersen

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Stainless Steel Optical Posts: Ø1/2", Ø12.7 mm, and Ø12 mm

Features