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Ø1/2" Post Construction Accessories


  • Compatible with Our Ø1/2" Posts
  • Essential Building Blocks for Complex, Rigid Structures
  • All Through Holes are Double-Bored for Two
    Lines of Post-to-Mount Contact

RA90RS

Mounts Ø1" to
Ø1/2" Posts
(Posts Sold
Separately)

RA180

Right-Angle End Clamp

RA90

Mounts Two Ø1/2" Posts at a Fixed 90° Angle
(Posts Sold
Separately)

Application Idea

Use the PJ301 Mounting Joist to mount two mirrors in KM100 Mirror Mounts on a Ø1" post.

Related Items


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Features

  • Rigid Construction Accessories Required for Many Complex 3D Assemblies
  • Angle Clamp Options
    • Fixed 45° (Left- or Right-Handed)
    • Fixed 90° Ø6 mm, Ø1/2", or Ø1" Mounting Options
    • Fixed 0°, 90°, or 360° for Two Ø1/2" Posts
    • Continuous 360°
  • Mounting Joists Provide Space-Saving Platform for Multiple Optical Mounts
  • PMTR(/M) Clamps Large Components or Serves as an Adjustable-Height Mounting Joist

When space is at a premium, Thorlabs' Angle Clamps and Mounting Joists provide great space-saving solutions. Our angle clamps give the user the ability to orient our Ø1/2" posts in multiple directions and provide rigid, stable, and compact structures that can meet many laboratory needs. The double-bored mounting holes ensure two lines of stable contact, while the aluminum thumbscrews securely fasten the posts in place. For added convenience, many of the angle clamps are also sold in packs of 5.

Thorlabs' Mounting Joists provide even more space-saving options. The compact joist can be used to mount multiple optical elements close together, which alleviates the need for multiple posts and post holders. These versatile joists can also offset a post from the mounted optic in order to squeeze the optic into tight areas. The two joist designs provide adaptable laboratory solutions to crowded table problems. For mounting prisms and cylindrical objects with a small footprint, Thorlabs also offers Ø1/2" post-compatible fixed compact mounts.

Our PMTR(/M) Component Clamp can be used to secure prisms, cylindrical components, and other devices. The clamp mounts to our Ø1/2" posts using a stable double bore and offers five 1/4"-20 (M6) tapped holes. It can also be used as a mounting joist for optical mounts.


Posted Comments:
bdada  (posted 2011-10-04 20:02:00.0)
Response from Buki at Thorlabs: Thank you for your feedback. We will contact you directly to discuss the issue you're having with the RA90/M thumbscrews. We will also look into improvements we can make to the RA90.
david.gherardi  (posted 2011-10-03 05:37:48.0)
I had the same problem as drs. I found that a number of thumbscrews (supplied with RA90/M) sheared off very easily when they were tightened using a hex key. David
Adam  (posted 2010-04-22 09:20:58.0)
A response from Adam at Thorlabs to David: I like this idea alot and will recommend this to our mechanics engineers as a customer inspired new product idea. We would like to ship you out a sample of a prototype unit so I will contact you to get your shipping information.
david.dutton  (posted 2010-04-21 11:34:55.0)
Product suggestion for SWC: Thank you for all of your great products. Is it possible to have an SWC that has some sort of reference mark for 0, 45 and 90 degrees? Anodized marks on the side or a spring plunger? No worries if it is not possible, just an idea I had. Thank you
Laurie  (posted 2008-12-08 10:18:28.0)
Response from Laurie to drs: Thank you for your feedback concerning our SWC Swivel Post Clamp. Someone from our technical support staff will contact you shortly concerning your inquiry.
drs  (posted 2008-12-06 14:11:12.0)
Since the knurled screws on the SWC had hex socket openings, I tightened them using a hex socket wrench - I found that hand tightening them was not quite enough. One of the knurled screw heads sheared off quite easily. How do I get a replacement?

Angle Clamps for Ø1/2" Posts

  • Rigid Construction Accessories Required for Many Complex 3D Assemblies
  • Double-Bored Through Holes for Stable Two-Line Contact
  • Aluminum Thumbscrew Provides Secure Holding Force for Locking

Thorlabs' Angle Clamps securely fasten our Ø1/2" posts at a variety of angles to one another. In addition to the fixed angle options, we also offer a variant for 360° continuous adjustment (Item # SWC). The holes of these clamps are double bored to provide two lines of stable contact. The RA180(/M) has one double-bored hole and a 1/4"-20 (M6) threaded stud on the bottom, which allows this clamp to be directly threaded onto a post. The RA360(/M) has two double-bored holes allowing two posts to be mounted parallel to each other. The RA360(/M) also features a #8 (M4) counterbore allowing the parallel posts to be mounted horizontally to the top of another post. The 3/16" (5 mm) hex thumbscrews located at either side of each clamp secure the Ø1/2" posts in place once the desired position is achieved.

For added convenience, many of these clamps are also sold in packs of 5.

Product Image
(Click for Details)a
RA45(/M) RA135(/M) RA90(/M) RA180(/M) RA360(/M) SWC(/M)
Item # RA45(/M) RA135(/M) RA90(/M) RA180(/M) RA360(/M) SWC(/M)
Clamp Angle 45°, Right Handed 45°, Left Handed 90° 90° 0°, 90°, or 360° Continuous 360°
  • Posts Sold Separately
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
RA45 Support Documentation
RA45Customer Inspired! Right-Handed 45° Angle Clamp for Ø1/2" Posts, 3/16" Hex
$12.14
Today
RA45-P5 Support Documentation
RA45-P5Right-Handed 45° Angle Clamp for Ø1/2" Posts, 3/16" Hex, 5 Pack
$60.69
Today
RA135 Support Documentation
RA135Customer Inspired! Left-Handed 45° Angle Clamp for Ø1/2" Posts, 3/16" Hex
$12.26
Today
RA90 Support Documentation
RA90Right-Angle Clamp for Ø1/2" Posts, 3/16" Hex
$9.76
Today
RA90-P5 Support Documentation
RA90-P5Right-Angle Clamp for Ø1/2" Posts, 3/16" Hex, 5 Pack
$48.80
Today
RA180 Support Documentation
RA180Right-Angle End Clamp for Ø1/2" Posts, 1/4"-20 Stud and 3/16" Hex
$10.81
Today
RA180-P5 Support Documentation
RA180-P5Right-Angle Post Clamp for Ø1/2" Posts, 1/4"-20 Stud and 3/16" Hex, 5 Pack
$54.06
Today
RA360 Support Documentation
RA360Customer Inspired! Parallel Clamp for Ø1/2" Posts, #8 Counterbore and 3/16" Hex
$14.00
Today
SWC Support Documentation
SWCRotating Clamp for Ø1/2" Posts, 360° Continuously Adjustable, 3/16" Hex
$23.56
Today
SWC-P5 Support Documentation
SWC-P5Rotating Clamp for Ø1/2" Posts, 360° Continuously Adjustable, 3/16" Hex, 5 Pack
$117.81
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
RA45/M Support Documentation
RA45/MCustomer Inspired! Right-Handed 45° Angle Clamp for Ø1/2" Posts, 5 mm Hex
$12.14
Today
RA45/M-P5 Support Documentation
RA45/M-P5Right-Handed 45° Angle Clamp for Ø1/2" Posts, 5 mm Hex, 5 Pack
$60.69
Today
RA135/M Support Documentation
RA135/MCustomer Inspired! Left-Handed 45° Angle Clamp for Ø1/2" Posts, 5 mm Hex
$12.26
Today
RA90/M Support Documentation
RA90/MRight-Angle Clamp for Ø1/2" Posts, 5 mm Hex
$9.76
Today
RA90/M-P5 Support Documentation
RA90/M-P5Right-Angle Clamp for Ø1/2" Posts, 5 mm Hex, 5 Pack
$48.80
Today
RA180/M Support Documentation
RA180/MRight-Angle End Clamp for Ø1/2" Posts, M6 Stud and 5 mm Hex
$10.81
Today
RA180/M-P5 Support Documentation
RA180/M-P5Right-Angle End Clamp for Ø1/2" Posts, M6 Stud and 5 mm Hex, 5 Pack
$54.06
Today
RA360/M Support Documentation
RA360/MCustomer Inspired! Parallel Clamp for Ø1/2" Posts, M4 Counterbore and 5 mm Hex
$14.00
Today
SWC/M Support Documentation
SWC/MRotating Clamp for Ø1/2" Posts, 360° Continuously Adjustable, 5 mm Hex
$23.56
Today
SWC/M-P5 Support Documentation
SWC/M-P5Rotating Clamp for Ø1/2" Posts, 360° Continuously Adjustable, 5 mm Hex, 5 Pack
$117.81
Today

Ø1/2" to Ø6 mm Right-Angle Post Clamp

RA90TR Clamp
Click to Enlarge
A Ø6 mm Cage Rod Mounted Perpendicularly to a Ø1/2" Post Using the RA90TR/M Clamp
  • Mounts a Ø6 mm Post or Cage Rod Perpendicular to a Ø1/2" Post
  • Thumbscrew Secures Right-Angle Clamp to Ø1/2" Post
  • Flexure Mechanism Secures Ø6 mm Post
  • Imperial and Metric Versions Available

The RA90TR(/M) Clamp allows a Ø6 mm cage rod or mini-series post to be mounted perpendicularly to a Ø1/2" post. The design combines a highly stable clamp flexure lock that is secured using an 5/64" (2 mm) balldriver with a thumbscrew locking mechanism for attaching the clamp to the Ø1/2" post. The center-to-center distance between the two posts is 1/2" (12.7 mm).

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
RA90TR Support Documentation
RA90TRCustomer Inspired! Right-Angle Ø1/2" to Ø6 mm Post Clamp, 3/16" Hex Thumbscrew
$15.61
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
RA90TR/M Support Documentation
RA90TR/MCustomer Inspired! Right-Angle Ø1/2" to Ø6 mm Post Clamp, 5 mm Hex Thumbscrew
$15.61
Today

Ø1" to Ø1/2" Right-Angle Post Clamp

RA90RS Clamp
Click to Enlarge
A Ø1/2" Post Mounted Perpendicularly to a Ø1" Post Using the RA90RS Clamp
  • Mounts a Ø1/2" Post Perpendicular to a Ø1" (Ø25.0 mm) Post
  • Flexure Mechanism Secures Right-Angle Clamp to Ø1" (Ø25.0 mm) Post
  • Thumbscrew Secures Ø1/2" Post
  • Imperial and Metric Versions Available

The RA90RS(/M) clamp allows a Ø1/2" post to be mounted perpendicularly to a Ø1" (25.0 mm) post. The design combines a highly stable clamp flexure lock that is secured using a 3/16" or 5 mm balldriver with a thumbscrew locking mechanism to provide a solution that enables a Ø1/2" post to be mounted perpendicular to a Ø1" (Ø25.0 mm) post. The center-to-center distance between the two posts is 1" for the imperial version and 25.0 mm for the metric version.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
RA90RS Support Documentation
RA90RSRight-Angle Ø1" to Ø1/2" Post Clamp
$26.78
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
RA90RS/M Support Documentation
RA90RS/MRight-Angle Ø25.0 mm to Ø1/2" Post Clamp
$26.78
Today

Mounting Joists

PJ302(/M)
Click to Enlarge
View Imperial Product List
Item #QtyDescription
Imperial Product List
PJ3021Offset Mounting Post Joist, 8-32 Mounting Hardware
RS41Ø1" Pillar Post, 1/4"-20 Taps, L = 4", 8-32 Adapter Included
KM1001Kinematic Mirror Mount for Ø1" Optics
View Metric Product List
Item #QtyDescription
Metric Product List
PJ302/M1Offset Mounting Post Joist, M4 Mounting Hardware
RS100/M1Ø25.0 mm Pillar Post, M6 Taps, L = 100 mm, M4 Adapter Included
KM1001Kinematic Mirror Mount for Ø1" Optics
PJ302 Post Joint Mounting a Mirror in a Position Offset from the Center of a Ø1" Post
PJ301(/M)
Click to Enlarge
View Imperial Product List
Item #QtyDescription
Imperial Product List
PJ3011Centered Mounting Post Joist, 8-32 Mounting Hardware
LMR12Lens Mount with Retaining Ring for Ø1" Optics, 8-32 Tap
TR41Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 4"
View Metric Product List
Item #QtyDescription
Metric Product List
PJ301/M1Centered Mounting Post Joist, M4 Mounting Hardware
LMR1/M2Lens Mount with Retaining Ring for Ø1" Optics, M4 Tap
TR100/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 100 mm
PJ301 Post Joist Mounting Two Lenses About the Center of a Ø1/2" Post
  • Compatible with Thorlabs' Ø1/2" and Ø1" Posts
  • Space-Saving Design Allows for Multiple Optical Elements to be Mounted on One Post
  • Options for Center Mounting or Offset Mounting

Thorlabs’ Mounting Joists provide valuable space-saving mounting options that are ideal for crowded optical tables or breadboards. These mounts are compatible with our Ø1/2” and Ø1” posts and allow multiple optics to be mounted close together on a single joist, eliminating the need for multiple posts and post holders.

The PJ301(/M) enables centered mounting in which optics can be placed on both sides of the post center. It features a centered #8 (M4) counterbore for post mounting and two #8 (M4) counterbored slots for mounting optomechanical components. This joist allows an optic to be offset by 0.40" - 1.40" (10.16 mm - 35.56 mm) from the post center.

The PJ302(/M) enables offset mounting in which optics can be mounted to one side of the post center. It features two #8 (M4) counterbored slots with opposite orientations, one for post mounting and one for mounting optomechanical components. This joist allows an optic to be offset by 0.40" - 2.70" (10.16 mm - 68.58 mm) from the post center.

Please note that imperial nuts only fit the imperial joists and metric nuts only fit the metric joists. Nuts are included with the these joists.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
PJ301 Support Documentation
PJ301Centered Mounting Post Joist, 8-32 Mounting Hardware
$17.24
Today
PJ302 Support Documentation
PJ302Offset Mounting Post Joist, 8-32 Mounting Hardware
$16.22
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
PJ301/M Support Documentation
PJ301/MCentered Mounting Post Joist, M4 Mounting Hardware
$17.24
Today
PJ302/M Support Documentation
PJ302/MOffset Mounting Post Joist, M4 Mounting Hardware
$16.22
Today

Component Clamp


Click to Enlarge

View Imperial Product List
Item #QtyDescription
KM200B13.01" x 3.01" Kinematic Platform Mount
TR32Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
PMTR1Component Clamp for Ø1/2" Posts, 1/4"-20 Taps
BS031150:50 Non-Polarizing Beamsplitter Cube, 400 - 700 nm, 2"
UPH31Ø1/2" Universal Post Holder, Spring-Loaded Locking Thumbscrew, L = 3"
View Metric Product List
Item #QtyDescription
KM200B13.01" x 3.01" Kinematic Platform Mount
TR75/M2Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
PMTR/M1Component Clamp for Ø1/2" Posts, M6 Taps
BS031150:50 Non-Polarizing Beamsplitter Cube, 400 - 700 nm, 2"
UPH75/M1Ø12.7 mm Universal Post Holder, Spring-Loaded Locking Thumbscrew, L = 75 mm
2" Beamsplitter Cube Held Using PMTR Clamp

Click to Enlarge

View Imperial Product List
Item #QtyDescription
VC31Large V-Clamp with PM4 Clamping Arm, 2.5" Long
SM3L201SM3 Lens Tube, 2" Thread Depth, One Retaining Ring Included
PMTR1Component Clamp for Ø1/2" Posts, 1/4"-20 Taps
TR61Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 6"
UPH1.51Ø1/2" Universal Post Holder, Spring-Loaded Locking Thumbscrew, L = 1.5"
View Metric Product List
Item #QtyDescription
VC3C/M1Large V-Clamp with PM4/M Clamping Arm, 63.5 mm Long, Metric
SM3L2012" SM3 Series Lens Tube
PMTR/M1Component Clamp for Ø1/2" Posts, M6 Taps
TR150/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 150 mm
UPH30/M1Ø12.7 mm Universal Post Holder, Spring-Loaded Locking Thumbscrew, L = 30 mm
Ø3" Lens Tube Clamped in
V-Mount

Click to Enlarge

View Imperial Product List
Item #QtyDescription
KM1001Kinematic Mirror Mount for Ø1" Optics
BB1-E031Ø1" Broadband Dielectric Mirror, 750 - 1100 nm
AE8E25E1Dual Threaded Adapter with Internal 8-32 Threads and External 1/4"-20 Threads
PMTR1Component Clamp for Ø1/2" Posts, 1/4"-20 Taps
TR31Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
UPH31Ø1/2" Universal Post Holder, Spring-Loaded Locking Thumbscrew, L = 3"
View Metric Product List
Item #QtyDescription
KM1001Kinematic Mirror Mount for Ø1" Optics
BB1-E031Ø1" Broadband Dielectric Mirror, 750 - 1100 nm
AE4M6M1Dual Threaded Adapter with Internal M4 x 0.7 Threads and External M6 x 1.0 Threads
PMTR/M1Component Clamp for Ø1/2" Posts, M6 Taps
TR75/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
UPH75/M1Ø12.7 mm Universal Post Holder, Spring-Loaded Locking Thumbscrew, L = 75 mm
KM100 Mounted Upside Down
  • Five 1/4"-20 (M6 x 1.0) Tapped Thru Holes
  • Secure a Prism or Other Component Using a Nylon-Tipped Setscrew
  • Slip-On Collar Design Attaches to Ø1/2" Posts Using Thumbscrew
  • Use as Mounting Joist to Offset Optical Mounts

The PMTR(/M) Component Clamp can be used to secure prisms, cylindrical components, and other devices. The clamp mounts to our Ø1/2" Posts using a stable double bore and offers five 1/4"-20 (M6) tapped holes. Components are secured using the included 1/4"-20 (M6) nylon-tipped setscrew with 1/8" (3.0 mm) hex. The closest tap is 1" (25.0 mm) from the center of the Ø1/2" post and the farthest tap is 2" (50.0 mm) away. Two of the the taps are orthogonal to the post for side-mounting components. Cylindrical components up to 3" (76.2 mm) in diameter may be held in place in a V-mount using the PMTR(/M) Clamp, as shown in the second photo to the right.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
PMTR Support Documentation
PMTRComponent Clamp for Ø1/2" Posts, 1/4"-20 Taps
$24.99
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
PMTR/M Support Documentation
PMTR/MComponent Clamp for Ø1/2" Posts, M6 Taps
$24.99
Today
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