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Ø1" (Ø25.0 mm) Pedestal Pillar Posts


  • Solid Stainless Steel Construction
  • 8-32 (M4) or 1/4"-20 (M6) Taps on Both Ends

8-32 (M4) Tapped Holes
On Both Ends

RS4P8E

RS2P8E

RS05P8E

RS3P

RS1.5P

RS1P

CF125

Steel
Clamping
Forks

1/4"-20 (M6) Tapped Holes
On Both Ends

RS1LM

Peelable Shims

Ø1" (Ø25 mm) Post Spacers

Smooth or Threaded Bore

RS1M

RS5M

RS039

Related Items


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Features

  • Post Lengths from 0.5" (12.5 mm) to 6" (155 mm)
  • Stackable via 8-32 (M4) or 1/4"-20 (M6) Taps
  • Extend Height with our Ø1" Extension Posts
  • Pedestal Base for Clamping Fork Compatibility
  • Solid Stainless Steel, Precision Ground to Ø1" (Ø25.0 mm)

These one-piece nonmagnetic stainless steel Pedestal Posts provide unparalleled strength and rigidity. We offer versions with 8-32 (M4) or 1/4"-20 (M6) taps on both ends. A wide relief cut around each tap offers stable fastening to our optical mounts and optical tables. Pedestal posts are available in a variety of heights from 0.5" (12.5 mm) to 6" (155 mm). Additional heights can be achieved by stacking posts with heights of 0.39" (10 mm) or shorter on top of a standard pillar post.

The pedestal base is compatible with our solid steel Clamping Forks (see below), providing a high degree of flexibility when securing post assemblies to an optical table. If space is an issue, our CL8, CF038-P5, and CF038C(/M)-P5 clamps offer a space-saving alternative to secure our posts to an optical table. Also available below are Post Spacers, which add vertical positioning flexibility, and can be stacked with the pedestal posts to achieve in-between lengths. Additionally, these post spacers, along with 1/4"-20 (M6) setscrews, are available in our Post Spacer and Setscrew Kit, which is also sold below.


Posted Comments:
fabian.stutzki  (posted 2016-03-02 08:01:37.617)
Hi, it would be nice to have a post that perfectly fits to mount a Polaris mirror on 40 mm beam height. The post would have to have a height of about 15mm. Best regards Fabian Stutzki
besembeson  (posted 2016-03-02 01:47:04.0)
Response from Bweh at Thorlabs USA: You may achieve this at the moment using the RS05P/M with a suitable spacer such as the RS3M.
roger.ding  (posted 2015-08-07 00:32:01.357)
A Ø1" Pedestal Pillar Post, 8-32 Taps, L = 2.5" (i.e. 1 in pedestal pillar post with a length of 2.5 inches). I'm currently getting the 2.5 in posts from Newport (item #9955) because Thorlabs doesn't offer this height.
besembeson  (posted 2015-08-19 03:32:01.0)
Response from Bweh at Thorlabs USA: Thanks for your feedback. Although you can use the RS1.5P8E and the PLS-P1 with an AP8E25E, we will look into expanding our 1" posts product line to include solid 2.5" length as stock item.
bdada  (posted 2012-03-07 12:20:00.0)
Response from Buki at Thorlabs: Thank you for your feedback on the variation you have experienced with the tolerance of our posts. We will look into this issue. We do not have your contact information, so please contact us so we can keep you updated on our findings and replace any posts that do not meet our tolerance specification.
user  (posted 2012-03-05 17:34:52.0)
All these posts seem to vary in length more than i'd expect, can you look at the tolerance and perhaps tighten it up. This simple change would make these post more useful. Same would apply to your other post series.
bdada  (posted 2011-10-20 12:45:00.0)
Response from Buki at Thorlabs: Thank you for your suggestion. Please consider using one of our extension posts to get a variety of lengths and introduce more flexibility into your system. For instance, to get an RS2.5P/M (62.5mm height), you could combine the RS2P/M (50mm height) with the RS12/M extension post (12.5mm height) shown on the page linked below: http://www.thorlabs.de/NewGroupPage9.cfm?ObjectGroup_ID=241 If you do not want to use the extension post, please contact TechSupport@thorlabs.com regarding a custom length post.
umit79  (posted 2011-10-20 13:39:53.0)
I would like to also see RS2.5P/M in the product list.
Laurie  (posted 2009-03-19 13:18:15.0)
Response from Laurie at Thorlabs to hbabcock: Thank you for your interest in our posts and for your valuable feedback. For customers desiring a 1/4"-20 thread, we do offer a series of "P Posts," which have a 1.5" diameter. However, you are definitely correct that we need to provide links and text specifically guiding you towards the thread adapter that can convert these RS posts to 1/4"-20 threading. We will make that addition very shortly. Once again, thank you for taking the time to provide valuable feedback that will help others in the future!
hbabcock  (posted 2009-03-19 10:23:18.0)
Id also like to see a 1/4-20 threaded version of these. I naively assumed that these would be directly compatible with the 1" post extensions. You might also consider listing the adapter as a related item. I discovered that it existed by reading the feedback for this product.
Laurie  (posted 2008-10-15 12:17:31.0)
Response from Laurie at Thorlabs to acable: Currently we do offer an 8-32 to 1/4-20 adapter (Item# AP8E25E), which would allow you to connect our post extensions to our pedestal posts. However, I understand that youd like the larger thread throughout for stability. Thorlabs does have an internal forum for product ideas, and I will be sure to enter your suggestion into that forum for consideration. In the interim, if you contact our technical support staff, theyd be able to provide you with a custom quote for tapping our pedestal posts with a 1/4-20 thread.
acable  (posted 2008-10-13 09:20:37.0)
The Post Extensions are tapped 1/4-20 (M6-1.0) both ends, however the Pedestal Posts have an #8-32 (M4-0.7) tap, would it be possible to change the Pedestal Post to a 1/4-20 (M6). Using the larger thread size would allow an assembly of Posts to be tightened with sufficent torque to provide assurance that the assembly would not vibrate loose. Then in order for the Pedestal Posts to accept Opto-Mech with #8 (M4)mounting feature inclusion of one of the following thread adapter could be included with each post: AE8E25E - Thread Adapter, Internal to External Stud, #8-32 to 1/4"-20 AE4M6M - Thread Adapter, Internal to External Stud, M4 to M6
technicalmarketing  (posted 2008-02-22 08:33:50.0)
Thank you for suggesting a new product. We always like to hear from our customers about ways that we can better serve you. I will pass this information on to our engineers in mechanics for discussion. If adopted, this item would join our growing list of customer inspired products. Thanks again for your input!
zilong.chen  (posted 2008-02-21 17:02:45.0)
Hi, Would Thorlabs consider manufacturing shorter clamping forks for use in small spaces? A 1.5"-2" short fork can be very useful in constrained spaces. Thanks, Zilong

Ø1" (Ø25.0 mm) Pedestal Posts, 8-32 (M4) Taps

  • Solid Stainless Steel Construction
  • Precision Ground to Ø1" (Ø25.0 mm)
  • Stackable via 8-32 (M4) Tapped Holes on Both Ends
  • Convenient Pedestal Base Design Compatible with Our CF Series Clamping Forks

These pedestal pillars, which are fabricated from 303 stainless steel, are 1" (25.0 mm) in diameter, have 8-32 (M4) taps on both ends, and are available in a variety of lengths. The 8-32 (M4) taps are compatible with many optomechanical devices such as most of our kinematic mounts. A Ø0.24" (6.0 mm) through hole is located on the side of each post and can be used with a 3/16" (5 mm) balldriver or the SPW501 Spanner Wrench to provide extra leverage during tightening. These posts are also available with 1/4"-20 (M6) taps; please see below for details.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
RS05P8E Support Documentation
RS05P8ECustomer Inspired! Ø1" Pedestal Pillar Post, 8-32 Taps, L = 0.5"
$19.69
Today
RS075P8E Support Documentation
RS075P8ECustomer Inspired! Ø1" Pedestal Pillar Post, 8-32 Taps, L = 0.75"
$21.42
Today
RS1P8E Support Documentation
RS1P8ECustomer Inspired! Ø1" Pedestal Pillar Post, 8-32 Taps, L = 1"
$21.93
Today
RS1.5P8E Support Documentation
RS1.5P8ECustomer Inspired! Ø1" Pedestal Pillar Post, 8-32 Taps, L = 1.5"
$23.77
Today
RS2P8E Support Documentation
RS2P8ECustomer Inspired! Ø1" Pedestal Pillar Post, 8-32 Taps, L = 2"
$24.48
Today
RS2.5P8E Support Documentation
RS2.5P8EØ1" Pedestal Pillar Post, 8-32 Taps, L = 2.5"
$25.50
Today
RS3P8E Support Documentation
RS3P8ECustomer Inspired! Ø1" Pedestal Pillar Post, 8-32 Taps, L = 3"
$26.78
Today
RS3.5P8E Support Documentation
RS3.5P8EØ1" Pedestal Pillar Post, 8-32 Taps, L = 3.5"
$29.84
Today
RS4P8E Support Documentation
RS4P8ECustomer Inspired! Ø1" Pedestal Pillar Post, 8-32 Taps, L = 4"
$32.39
Today
RS6P8E Support Documentation
RS6P8EØ1" Pedestal Pillar Post, 8-32 Taps, L = 6"
$43.86
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
RS05P4M Support Documentation
RS05P4MCustomer Inspired! Ø25.0 mm Pedestal Pillar Post, M4 Taps, L = 12.5 mm
$19.69
Today
RS075P4M Support Documentation
RS075P4MCustomer Inspired! Ø25.0 mm Pedestal Pillar Post, M4 Taps, L = 19 mm
$21.42
Today
RS1P4M Support Documentation
RS1P4MCustomer Inspired! Ø25.0 mm Pedestal Pillar Post, M4 Taps, L = 25 mm
$21.93
Today
RS1.5P4M Support Documentation
RS1.5P4MCustomer Inspired! Ø25.0 mm Pedestal Pillar Post, M4 Taps, L = 38 mm
$23.77
Today
RS2P4M Support Documentation
RS2P4MCustomer Inspired! Ø25.0 mm Pedestal Pillar Post, M4 Taps, L = 50 mm
$24.48
Today
RS2.5P4M Support Documentation
RS2.5P4MØ25.0 mm Pedestal Pillar Post, M4 Taps, L = 65 mm
$25.50
Today
RS3P4M Support Documentation
RS3P4MCustomer Inspired! Ø25.0 mm Pedestal Pillar Post, M4 Taps, L = 75 mm
$26.78
Today
RS3.5P4M Support Documentation
RS3.5P4MØ25.0 mm Pedestal Pillar Post, M4 Taps, L = 90 mm
$29.84
Today
RS4P4M Support Documentation
RS4P4MCustomer Inspired! Ø25.0 mm Pedestal Pillar Post, M4 Taps, L = 100 mm
$32.39
Today
RS6P4M Support Documentation
RS6P4MØ25.0 mm Pedestal Pillar Post, M4 Taps, L = 155 mm
$43.86
Today

Ø1" (Ø25.0 mm) Pedestal Posts, 1/4"-20 (M6) Taps

post and post extension
Click to Enlarge

Ø1" Pedestal Pillar Post Shown With Ø1" Post Extension
  • Solid Stainless Steel Construction
  • Precision Ground to Ø1" (Ø25.0 mm)
  • Stackable via 1/4"-20 (M6) Tapped Holes on Both Ends
  • Convenient Pedestal Base Design Compatible with Our CF Series Clamping Forks

These pedestal pillars, which are fabricated from 303 stainless steel, are 1" (25.0 mm) in diameter, have 1/4"-20 (M6) taps on both ends, and are available in a variety of lengths. The 1/4"-20 (M6) thread allows for easy integration of Ø1" post extensions and spacers. Each imperial post ships with an AE8E25E adapter to switch from the 1/4"-20 thread on the post to an internal 8-32 thread. The metric versions have an AE4M6M M6 to M4 adapter included.

A Ø0.24" (6.0 mm) through hole is located on the side of each post and can be used with a 3/16" (5 mm) balldriver or the SPW501 Spanner Wrench to provide extra leverage during tightening.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
RS05P Support Documentation
RS05PØ1" Pedestal Pillar Post, 1/4"-20 Taps, L = 0.5"
$19.99
Today
RS075P Support Documentation
RS075PØ1" Pedestal Pillar Post, 1/4"-20 Taps, L = 0.75"
$22.44
Today
RS1P Support Documentation
RS1PØ1" Pedestal Pillar Post, 1/4"-20 Taps, L = 1"
$22.95
Today
RS1.5P Support Documentation
RS1.5PØ1" Pedestal Pillar Post, 1/4"-20 Taps, L = 1.5"
$24.79
Today
RS2P Support Documentation
RS2PØ1" Pedestal Pillar Post, 1/4"-20 Taps, L = 2"
$27.29
Today
RS2.5P Support Documentation
RS2.5PØ1" Pedestal Pillar Post, 1/4"-20 Taps, L = 2.5"
$28.82
Today
RS3P Support Documentation
RS3PØ1" Pedestal Pillar Post, 1/4"-20 Taps, L = 3"
$29.84
Today
RS3.5P Support Documentation
RS3.5PØ1" Pedestal Pillar Post, 1/4"-20 Taps, L = 3.5"
$32.90
Today
RS4P Support Documentation
RS4PØ1" Pedestal Pillar Post, 1/4"-20 Taps, L = 4"
$35.45
Today
RS6P Support Documentation
RS6PØ1" Pedestal Pillar Post, 1/4"-20 Taps, L = 6"
$43.86
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
RS05P/M Support Documentation
RS05P/MØ25.0 mm Pedestal Pillar Post, M6 Taps, L = 12.5 mm
$19.99
Today
RS075P/M Support Documentation
RS075P/MØ25.0 mm Pedestal Pillar Post, M6 Taps, L = 19 mm
$22.44
Today
RS1P/M Support Documentation
RS1P/MØ25.0 mm Pedestal Pillar Post, M6 Taps, L = 25 mm
$22.95
Today
RS1.5P/M Support Documentation
RS1.5P/MØ25.0 mm Pedestal Pillar Post, M6 Taps, L = 38 mm
$24.79
Today
RS2P/M Support Documentation
RS2P/MØ25.0 mm Pedestal Pillar Post, M6 Taps, L = 50 mm
$27.29
Today
RS2.5P/M Support Documentation
RS2.5P/MØ25.0 mm Pedestal Pillar Post, M6 Taps, L = 65 mm
$28.82
Today
RS3P/M Support Documentation
RS3P/MØ25.0 mm Pedestal Pillar Post, M6 Taps, L = 75 mm
$29.84
Today
RS3.5P/M Support Documentation
RS3.5P/MØ25.0 mm Pedestal Pillar Post, M6 Taps, L = 90 mm
$32.90
Today
RS4P/M Support Documentation
RS4P/MØ25.0 mm Pedestal Pillar Post, M6 Taps, L = 100 mm
$35.45
Today
RS6P/M Support Documentation
RS6P/MØ25.0 mm Pedestal Pillar Post, M6 Taps, L = 155 mm
$43.86
Today

Ø1" (Ø25 mm) Posts, Less than 0.40" (10.2 mm) Length

Post Spacer Spanner Wrench
Click to Enlarge
SPW501 Spanner Wrench Being Used to Tighten a Small Ø1" Post onto a Ø1" Pillar Post
  • Solid Stainless Steel Construction
  • 1/4"-20 (M6) Tapped Hole
  • Large Diameter Relief Cut on Top and Bottom for Additional Mounting Stability
  • Spanner Wrench for Ø1" Posts and Ø1/2" Posts

These small posts are designed for achieving "in between" heights of our Ø1" (Ø25 mm) Posts without compromising structural rigidity. The center 1/4"-20 (M6) tapped through hole allows threaded studs to pass through to the mating tap of the components on the top and bottom. Each features two slots on the side which allow it to be securely tightened onto a post using the SPW501 spanner wrench (sold below), as shown in the image to the right. Posts with lengths 0.35" (9 mm) or larger feature a through hole instead of the two slots; this through hole accepts a 1/8" (3 mm) balldriver as well as the SPW501 for providing leverage while tightening or loosening.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
RS016 Support Documentation
RS016Ø1" Post, 1/4"-20 Tap, L = 0.16"
$9.49
Today
RS020 Support Documentation
RS020Ø1" Post, 1/4"-20 Tap, L = 0.20"
$9.59
Today
RS024 Support Documentation
RS024Ø1" Post, 1/4"-20 Tap, L = 0.24"
$10.30
Today
RS028 Support Documentation
RS028Ø1" Post, 1/4"-20 Tap, L = 0.28"
$10.30
Today
RS031 Support Documentation
RS031Ø1" Post, 1/4"-20 Tap, L = 0.31"
$10.30
Today
RS035 Support Documentation
RS035Ø1" Post, 1/4"-20 Tap, L = 0.35"
$11.83
Today
RS039 Support Documentation
RS039Ø1" Post, 1/4"-20 Tap, L = 0.39"
$11.83
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
RS4/M Support Documentation
RS4/MØ25 mm Post, M6 Tap, L = 4 mm
$9.49
Today
RS5/M Support Documentation
RS5/MØ25 mm Post, M6 Tap, L = 5 mm
$9.59
Today
RS6/M Support Documentation
RS6/MØ25 mm Post, M6 Tap, L = 6 mm
$10.30
Today
RS7/M Support Documentation
RS7/MØ25 mm Post, M6 Tap, L = 7 mm
$10.30
Today
RS8/M Support Documentation
RS8/MØ25 mm Post, M6 Tap, L = 8 mm
$10.30
Today
RS9/M Support Documentation
RS9/MØ25 mm Post, M6 Tap, L = 9 mm
$11.83
Today
RS10/M Support Documentation
RS10/MØ25 mm Post, M6 Tap, L = 10 mm
$11.83
Today

Ø25 mm Post Spacers

Post Spacers
Click to Enlarge
Post Spacer Being Used to Increase the Post Height
by 5 mm (0.2")
  • Solid Stainless Steel Construction
  • 1/4" (M6) Clearance Hole
  • Large Diameter Relief Cut on Top and Bottom for Additional Mounting Stability

These spacers are designed for achieving "in between" heights of our Ø1" (Ø25 mm) Posts without compromising structural rigidity. The center Ø1/4" (M6) clearance hole allows threaded studs to pass through to the mating tap of the components on either side of the spacer. Achieving, for example, a total post height of 8.2" is as simple as inserting one RS5M spacer (0.2" thickness) in between two RS4 posts (4" length).

Two hex-driven setscrews are included with each spacer. The 1 mm through 6 mm spacers include an M6 x 20 mm setscrew and a 1/4"-20 x 7/8" setscrew, while the 7 mm through 10 mm spacers include an M6 x 25 mm setscrew and a 1/4"-20 x 1" setscrew.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
RS1M Support Documentation
RS1MØ25 mm Post Spacer, Thickness = 1 mm
$6.58
Today
RS2M Support Documentation
RS2MØ25 mm Post Spacer, Thickness = 2 mm
$6.83
Today
RS3M Support Documentation
RS3MØ25 mm Post Spacer, Thickness = 3 mm
$7.45
Today
RS4M Support Documentation
RS4MØ25 mm Post Spacer, Thickness = 4 mm
$7.45
Today
RS5M Support Documentation
RS5MØ25 mm Post Spacer, Thickness = 5 mm
$7.70
Today
RS6M Support Documentation
RS6MØ25 mm Post Spacer, Thickness = 6 mm
$7.96
Today
RS7M Support Documentation
RS7MØ25 mm Post Spacer, Thickness = 7 mm
$8.11
Today
RS8M Support Documentation
RS8MØ25 mm Post Spacer, Thickness = 8 mm
$8.26
Today
RS9M Support Documentation
RS9MØ25 mm Post Spacer, Thickness = 9 mm
$8.52
Today
RS10M Support Documentation
RS10MØ25 mm Post Spacer, Thickness = 10 mm
$8.62
Today

Post Spacer and Setscrew Kit

RS-KIT Post Spacer and Setscrew Kit
Item Qty. Item Qty.
Ø25 mm Post Spacer, 1 mm Thick (RS1M) 5 Ø25 mm Post Spacer, 7 mm Thick (RS7M) 1
Ø25 mm Post Spacer, 2 mm Thick (RS2M) 5 Ø25 mm Post Spacer, 8 mm Thick (RS8M) 1
Ø25 mm Post Spacer, 3 mm Thick (RS3M) 5 Ø25 mm Post Spacer, 9 mm Thick (RS9M) 1
Ø25 mm Post Spacer, 4 mm Thick (RS4M) 5 Ø25 mm Post Spacer, 10 mm Thick (RS10M) 5
Ø25 mm Post Spacer, 5 mm Thick (RS5M) 5 1/4"-20 Setscrew, 7/8" Long 25
Ø25 mm Post Spacer, 6 mm Thick (RS6M) 1 1/4"-20 Setscrew, 1" Long (SS25S10) 25
RS-KIT/M Post Spacer and Setscrew Kit
Item Qty. Item Qty.
Ø25 mm Post Spacer, 1 mm Thick (RS1M) 5 Ø25 mm Post Spacer, 7 mm Thick (RS7M) 1
Ø25 mm Post Spacer, 2 mm Thick (RS2M) 5 Ø25 mm Post Spacer, 8 mm Thick (RS8M) 1
Ø25 mm Post Spacer, 3 mm Thick (RS3M) 5 Ø25 mm Post Spacer, 9 mm Thick (RS9M) 1
Ø25 mm Post Spacer, 4 mm Thick (RS4M) 5 Ø25 mm Post Spacer, 10 mm Thick (RS10M) 5
Ø25 mm Post Spacer, 5 mm Thick (RS5M) 5 M6 x 1.0 mm Setscrew, 20 mm Long (SS6MS20) 25
Ø25 mm Post Spacer, 6 mm Thick (RS6M) 1 M6 x 1.0 mm Setscrew, 25 mm Long (SS6MS25) 25
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
RS-KIT Support Documentation
RS-KITØ25 mm Post Spacer and 1/4"-20 Setscrew Kit
$291.72
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
RS-KIT/M Support Documentation
RS-KIT/MØ25 mm Post Spacer and M6 Setscrew Kit
$291.72
Today

Peelable Laminated Shims

The RS1LM on a 1
Click to Enlarge
Hold the knife edge at a 45° angle to the shim
to peel away layers.
  • Peel Away Individual Layers as Needed
  • Stainless Steel
  • Tabbed for Easy Peeling
  • Sold in Packs of 5

This Ø25 mm, peelable, laminated shim provides fine height adjustment when using our Ø1" posts. These 1.0 mm ± 10% thick shims come in packs of 5 and have 14 layers, which are each 0.075 mm thick. They have a through hole to accommodate a 1/4"-20 (M6) screw.

Be aware the finish on some shims may appear tarnished due to the manufacturing process. This does not affect form, fit, or function. Only the appearance is altered.

The RS1LM on a 1
Click to Enlarge

The RS1LM Shown Separating the RS2P Post and the PRM1 Rotation Mount

To peel, take a sharp edge like a box cutter and hold it at a 45° angle to the tab on the shim as shown in the photo to the right. Gently flick the knife upward until the layer begins to lift. In general, you should be able to lift an edge within 5 attempts. If you cannot get an edge to lift, gently tap the corner of the tab on a table until the material begins to flare.

Once an edge is lifted, insert the blade under the layer, squeeze the layer between your thumb and the blade, and roll your wrist down and then up to start peeling (see photo in the upper left). Once the layer has been peeled up enough, you can use your thumb and forefinger to remove it the rest of the way. Repeat this process until you have removed as many layers as desired. Discard all peeled-off layers.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
RS1LM Support Documentation
RS1LMCustomer Inspired! Ø25 mm Laminated Post Spacer, 1 mm Thick, Pack of 5
$36.47
Today

Spanner Wrench for Ø1/2" (12.7 mm) and Ø1" (25 mm) Posts

Using Spanner Wrench to Tighten or Loosen Post
Click to Enlarge

The SPW501 wrench tightens Ø1" posts that have torque slots or holes. 

The SPW501 Spanner Wrench is designed to tighten or loosen Ø1" posts that have torque slots, as illustrated in the photo to the right. The SPW501 can also be used with Ø1/2" posts and Ø1" posts that have through holes. The wrench is designed to fit into the slot or through hole and provide leverage for tightening or loosening the post when mounting the post directly to a tapped hole. Please use minimal force when tightening to prevent binding due to overtightening.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
SPW501 Support Documentation
SPW501Spanner Wrench for Ø1/2" Posts and Ø1" Posts
$16.40
Today

Clamping Forks for Ø1" Pedestal Posts


Click to Enlarge

The CF038C(/M)-P5, CF125C(/M), and CF175C(/M) each offer a captive screw.

Click to Enlarge
Available with Three Slot Lengths
  • Clamping Fork Secures Pedestal Post to a Breadboard or Optical Table
  • Three Sizes Provide Clamping with 1/4"-20 (M6) Cap Screws
    • 0.38" (9.5 mm) Long Counterbored Slot [CF038-P5 and CF038C(/M)-P5]
    • 1.24" (31.5 mm) Long Counterbored Slot [CF125 and CF125C(/M)]
    • 1.76" (44.8 mm) Long Counterbored Slot [CF175 and CF175C(/M)]
  • Swivel Fork 360° to Select Most Convenient Mounting Hole
  • CF038C(/M)-P5, CF125C(/M), and CF175C(/M) Each Include a 1/4"-20 (M6)-Threaded Captive Screw
  • Clamping Forks Available in Packs of Five [CF038-P5 and CF038C(/M)-P5 Not Sold Individually]

These clamping forks are designed to provide exceptional clamping force when used with our pedestal-style Ø1/2" post holders or the Ø1" pedestal posts sold above. Fabricated from solid 303 stainless steel, all of these clamping forks create three points of contact with the table for high stability.

For flexibility in the positioning of post assemblies, the CF038-P5 and CF038C(/M)-P5 forks have 0.38" (9.5 mm) long counterbored slots, the CF125 and CF125C(/M) forks have 1.24" (31.5 mm) long counterbored slots, and the CF175 and CF175C(/M) forks have 1.76" (44.8 mm) long counterbored slots. The counterbored slots on the CF038-P5, CF125, and CF175 forks are designed for user-supplied 1/4"-20 (M6)-threaded cap screws. For further convenience, the CF038C(/M)-P5, CF125C(/M), and CF175C(/M) each include a 1/4"-20 (M6)-threaded captive screw. Please note that significant over tightening of clamping forks can deform the surface of an optical table, which can cause misalignment of components and decrease stability.

Our clamping forks are also available in packages of five for ease of ordering (note: the CF038-P5 and CF038C(/M)-P5 clamping forks are only available in packs of five).

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
CF038C-P5 Support Documentation
CF038C-P5Clamping Fork, 0.38" Counterbored Slot, 1/4"-20 Captive Screw, 5 Pack
$48.20
Today
CF125C Support Documentation
CF125CCustomer Inspired! Clamping Fork, 1.24" Counterbored Slot, 1/4"-20 Captive Screw
$11.02
Today
CF125C-P5 Support Documentation
CF125C-P5Clamping Fork, 1.24" Counterbored Slot, 1/4"-20 Captive Screw, 5 Pack
$52.46
Today
CF175C Support Documentation
CF175CCustomer Inspired! Clamping Fork, 1.76" Counterbored Slot, 1/4"-20 Captive Screw
$12.04
Today
CF175C-P5 Support Documentation
CF175C-P5Clamping Fork, 1.76" Counterbored Slot, 1/4"-20 Captive Screw, 5 Pack
$57.57
Today
+1 Qty Docs Part Number - Universal Price Available / Ships
CF038-P5 Support Documentation
CF038-P5Customer Inspired! Clamping Fork, 0.38" Counterbored Slot, Universal, 5 Pack
$39.02
Today
CF125 Support Documentation
CF125Clamping Fork, 1.24" Counterbored Slot, Universal
$8.95
Today
CF125-P5 Support Documentation
CF125-P5Clamping Fork, 1.24" Counterbored Slot, Universal, 5 Pack
$42.45
Today
CF175 Support Documentation
CF175Clamping Fork, 1.76" Counterbored Slot, Universal
$10.30
Today
CF175-P5 Support Documentation
CF175-P5Clamping Fork, 1.76" Counterbored Slot, Universal, 5 Pack
$48.91
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
CF038C/M-P5 Support Documentation
CF038C/M-P5Clamping Fork, 9.5 mm Counterbored Slot, M6 x 1.0 Captive Screw, 5 Pack
$48.20
Today
CF125C/M Support Documentation
CF125C/MCustomer Inspired! Clamping Fork, 31.5 mm Counterbored Slot, M6 x 1.0 Captive Screw
$11.02
Today
CF125C/M-P5 Support Documentation
CF125C/M-P5Clamping Fork, 31.5 mm Counterbored Slot, M6 x 1.0 Captive Screw, 5 Pack
$52.46
Today
CF175C/M Support Documentation
CF175C/MCustomer Inspired! Clamping Fork, 44.8 mm Counterbored Slot, M6 x 1.0 Captive Screw
$12.04
Today
CF175C/M-P5 Support Documentation
CF175C/M-P5Clamping Fork, 44.8 mm Counterbored Slot, M6 x 1.0 Captive Screw, 5 Pack
$57.57
Today

Ø1" Pedestal Post Clamp

CL8 Clamping a Pedestal Post
Click to Enlarge

CL8 Clamps Securing RS4P8E Ø1" Pedestal Post
CL8 Cross Section
Click to Enlarge

CL8 Cross-Sectional View
  • Compatible with Ø1" and Ø1.5" Posts
  • Two-Point Contact with Pedestal Post Perimeter
  • Line Contact on Table for More Secure Clamping Force

Thorlabs' CL8 pedestal post clamp secures our Ø1" and Ø1.5" pedestal posts to an optical table or breadboard. Its V-shaped tip provides two-point contact with the post perimeter and its rounded edge increases the contact area along the table.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
CL8 Support Documentation
CL8Ø1" and Ø1.5" Pedestal Post Table Clamp
$8.06
Today

Post Position Retainers

  • Mark the Position of Ø1" and Ø1.5" Posts within an Optical System
  • Realignment Based on Two Contact Points
  • Third Contact Point for Realigning Square Components
  • Swivel Head Retainer Available with 200° of Rotation

Thorlabs' Position Retainers can be used to realign posts that have been removed from an optical system. They act as markers on the breadboard or optical table in the event that you need to remove a post from your setup. The two dots near the ends of the outer arms of the retainer mark the two points of post contact. The third dot, located within the V-groove, is for retaining the position of a square base or other squared-off component. For more information on using our retainers with square components, click here.

The RSPC Fixed Retainer is a compact solution for use with Ø1" and Ø1.5" Pedestal Posts. The post should be independently clamped down before aligning the RSPC retainer. After the retainer is mounted in place, the post can be removed from the setup and then later placed back into the same position.

The RSPCS(/M) Swivel Retainer features a swivel head for 200° of rotational adjustment. This allows for access to additional mounting holes on the breadboard. The post should be independently locked before aligning RSPCS(/M) retainer. Partially loosen the tension adjuster screw and then mount the retainer to a breadboard tap while maintaining contact with the post. Lastly, tighten the tension adjuster screw. After this the component can be removed from the setup and then later placed back into the same position.

RSPC Mounted Directly to Optical Table
Click to Enlarge
View Imperial Product List
Item #QtyDescription
Imperial Product List
RSPC1Fixed Position Retainer
RS21Ø1" Pillar Post, 1/4"-20 Taps, L = 2", 8-32 Adapter Included
CF1251Clamping Fork, 1.24" Counterbored Slot, Universal
BE11Ø1.25" Studded Pedestal Base Adapter, 1/4"-20 Thread
SH25S05011/4"-20 Stainless Steel Cap Screw, 1/2" Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
View Metric Product List
Item #QtyDescription
Metric Product List
RSPC1Fixed Position Retainer
RS50/M1Ø25.0 mm Pillar Post, M6 Taps, L = 50 mm, M4 Adapter Included
CF1251Clamping Fork, 1.24" Counterbored Slot, Universal
BE1/M1Ø31.8 mm Studded Pedestal Base Adapter, M6 Thread
SH6MS121M6 x 1.0 Stainless Steel Cap Screw, 12 mm Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
RSPC Position Retainer

Click to Enlarge
View Imperial Product List
Item #QtyDescription
Imperial Product List
RSPCS1Position Retainer with Swivel Head, 3/16" Hex Tension Adjuster
RS2P8E1Ø1" Pedestal Pillar Post, 8-32 Taps, L = 2"
CF1251Clamping Fork, 1.24" Counterbored Slot, Universal
SH25S05011/4"-20 Stainless Steel Cap Screw, 1/2" Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
View Metric Product List
Item #QtyDescription
Metric Product List
RSPCS/M1Position Retainer with Swivel Head, 5 mm Hex Tension Adjuster
RS3P4M1Ø25.0 mm Pedestal Pillar Post, M4 Taps, L = 75 mm
CF1251Clamping Fork, 1.24" Counterbored Slot, Universal
SH6MS121M6 x 1.0 Stainless Steel Cap Screw, 12 mm Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
RSPCS Swiveling Position Retainer
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
RSPCS Support Documentation
RSPCSPosition Retainer with Swivel Head, 3/16" Hex Tension Adjuster
$31.67
Today
+1 Qty Docs Part Number - Universal Price Available / Ships
RSPC Support Documentation
RSPCCustomer Inspired! Fixed Position Retainer
$9.38
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
RSPCS/M Support Documentation
RSPCS/MPosition Retainer with Swivel Head, 5 mm Hex Tension Adjuster
$31.67
Today
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