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Ø1" (Ø25.0 mm) Post Clamp Accessories


  • C-Clamps with Tapped or Counterbored Holes
  • Clamps for 30 mm and 60 mm Cage Support
  • Clamps with Rotating Threaded Studs

RA90RS

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

1/4"-20
(M6) Tap

1/4" (M6)
Counterbore

RM1B

C1026

For 30 mm
Cage Systems

RM1D

0.4" (10 mm)
Vertical Adjustment

PJ301 Mounting Joist Holds Retroreflecting Mirrors (All Parts Sold Separately)

Application Idea

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C-Clamps
Thorlabs' Ø1" (Ø25.0 mm) post clamps feature a C-clamp design that allows them to be slipped on and off of a Ø1 (Ø25.0 mm) post. The clamp is secured using a non-marring brass-tipped setscrew. The clamps come in a variety of styles, each with different mounting features, which are summarized in the table to the right.

For mounting larger systems or multiple components onto a Ø1" or Ø25 mm post, we also offer the C1001 Post Clamp, which features a vertically mounted breadboard.

Right-Angle Mounts
These right-angle mounts allow a Ø1" (Ø25.0 mm) post to be mounted at a right angle to another Ø1" (Ø25.0 mm) post or to a Ø1/2" post. They each feature a flexure clamping design for the Ø1" (Ø25.0 mm) post clamps.

Cage System Clamps
Our cage system clamps are designed to support 30 mm and 60 mm cage systems and feature a quick-connect cage clamp with single-screw locking. They clamp onto our Ø1" (Ø25.0 mm) posts using a flexure mechanism.

Mounting Joists
Thorlabs' compact mounting joists can be used to mount multiple optical elements close together, alleviating the need for multiple posts and posts holders. These versatile joists can also offset a post from the mounted optic in order to squeeze the optic into tight areas.


Posted Comments:
user  (posted 2018-06-19 13:31:00.917)
It would be very nice to have a 0-degree version of this product, to place a 1/2" post parallel to a 1" post.
YLohia  (posted 2018-06-19 09:57:48.0)
Hello, thank you for your feedback. I have posted this idea on our internal engineering forum.
sgeiger  (posted 2016-10-25 10:42:58.223)
Hello, in the step data there is an mistake. The "CLEARANCE HOLE FOR USE WITH M4 [8-32]CAP SCREW" is from the oposite side. (see also PDF data - that's right) Can I get an correct step-file? Best regards
tfrisch  (posted 2016-10-26 10:37:23.0)
Hello, thank you for contacting Thorlabs. I have sent you a corrected STEP file, and we are working on updating the webpage as well. Thank you for pointing out this error.

C-Clamps for Ø1" (Ø25.0 mm) Posts

Item # Mounting Featuresa
Tapped
Hole
Counterbored
Hole
Mounting
Stud
RM1A(/M) 8-32 (M4) #8 (M4) N/A 
RM1B(/M) 1/4"-20 (M6) 1/4" (M6) N/A 
RM1C(/M) 8-32 (M4) N/A  8-32 (M4)

RM1A(/M), RM1B(/M), and RM1C(/M) C-Clamps for Ø1" (Ø25.0 mm) posts each have two mounting points located 90° apart for perpendicular mounting of optomechanical components. On the RM1A(/M) and RM1B(/M), one of the mounting points has a tapped hole and the other has a counterbored hole. Alternatively, the RM1C(/M) has one mounting point with a rotating threaded mounting stud and another with a tapped hole. The C-clamp design allows these clamps to slide along a post to the desired position, where they can be locked by tightening the brass-tipped (non-marring) setscrew with a 5/64" (2 mm) hex key or balldriver.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
RM1A Support Documentation
RM1AØ1" Post Clamp, 8-32 Tap, #8 Counterbore
$26.78
Today
RM1B Support Documentation
RM1BØ1" Post Clamp, 1/4"-20 Tap, 1/4" Counterbore
$26.78
Today
RM1C Support Documentation
RM1CØ1" Post Clamp, 8-32 Tap, 8-32 Threaded Stud
$50.49
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
RM1A/M Support Documentation
RM1A/MØ25.0 mm Post Clamp, M4 Tap, M4 Counterbore
$26.78
Today
RM1B/M Support Documentation
RM1B/MØ25.0 mm Post Clamp, M6 Tap, M6 Counterbore
$26.78
Today
RM1C/M Support Documentation
RM1C/MØ25.0 mm Post Clamp, M4 Tap, M4 Threaded Stud
$50.49
Today

Variable Offset C-Clamp for Ø1" (Ø25.0 mm) Posts

Item #Mounting Featuresa
Tapped
Hole
Counterbored
Hole
RM1D(/M) 8-32 (M4) #8 (M4)

The RM1D(/M) Adjustable C-Clamp for Ø1" (Ø25.0 mm) posts has a #8 (M4) counterbore that can be varied in position over a range of 0.4" (10 mm). In addition, the clamp has an 8-32 tapped mounting hole in a fixed position on the backside of the clamp, as shown in the mechanical drawing to the right. The adjustable mounting arm is locked in place using a 3/16" (5 mm) hex thumbscrew. The C-clamp design allows this clamp to slide along a post to the desired position, where it can be locked by tightening the brass-tipped (non-marring) setscrew with a 5/64" (2 mm) hex key or balldriver.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
RM1D Support Documentation
RM1DØ1" Adjustable Post Clamp, 8-32 Tap, #8 Counterbore
$53.55
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
RM1D/M Support Documentation
RM1D/MØ25.0 mm Adjustable Post Clamp, M4 Tap, M4 Counterbore
$53.55
Today

Right-Angle Clamp for Ø1" (Ø25.0 mm) Posts

RSA90 Clamp
Click to Enlarge
Two Ø1" Posts Mounted Orthogonally Using the RSA90 Clamp
  • Mounts Two Ø1" (Ø25.0 mm) Posts Perpendicular to Each Other
  • Flexure Clamping Mechanism Secures Right-Angle Clamp to Ø1" (Ø25.0 mm) Posts
  • 1/4"-20 (M6) Cap Screws Secure the Posts
  • Imperial and Metric Versions Available

Thorlabs' RSA90(/M) Right-Angle Clamp allows one Ø1" (25.0 mm) post to be mounted perpendicularly to another Ø1" (25.0 mm) post. The clamp features a highly stable flexure lock design that is secured using a 3/16" (5 mm) balldriver. The center-to-center distance between the two posts is 1.25" for the imperial version and 30.0 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
RSA90 Support Documentation
RSA90Right-Angle Clamp for Ø1" Posts
$31.37
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
RSA90/M Support Documentation
RSA90/MRight-Angle Clamp for Ø25.0 mm Posts
$31.37
Today

Right-Angle Ø1" (Ø25.0 mm) to Ø1/2" 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, which is based off of the RA90 Right-Angle Post Clamp, combines a highly stable clamp flexure lock that is secured using a 3/16" (5 mm) balldriver with a thumbscrew locking mechanism. 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

Cage System Clamps for Ø1" (Ø25.0 mm) Posts


Click to Enlarge
View Imperial Product List
Item #QtyDescription
Imperial Product List
C1060160 mm Cage Clamp for Ø1" Posts
RS61Ø1" Pillar Post, 1/4"-20 Taps, L = 6", 8-32 Adapter Included
ER6-P41Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
LCP01260 mm Cage Plate, SM2 Threads, 0.5" Thick, 8-32 Tap (Two SM2RR Retaining Rings Included)
View Metric Product List
Item #QtyDescription
Metric Product List
C1060/M160 mm Cage Clamp for Ø25.0 mm Posts
RS150/M1Ø25.0 mm Pillar Post, M6 Taps, L = 150 mm, M4 Adapter Included
ER6-P41Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
LCP01/M260 mm Cage Plate, SM2 Threads, 0.5" Thick, M4 Tap (Two SM2RR Retaining Rings Included)
60 mm Cage System Mounted on a Ø1" Post Using a C1060 Clamp

Click to Enlarge
View Imperial Product List
Item #QtyDescription
Imperial Product List
C15QR1Quick-Release Handle for Ø1" or Ø1.5" Post Clamps, 1/4"-20 Threads
C1026130 mm Cage Clamp for Ø1" Posts
RS61Ø1" Pillar Post, 1/4"-20 Taps, L = 6", 8-32 Adapter Included
View Metric Product List
Item #QtyDescription
Metric Product List
C15QR/M1Quick Release Handle for Ø25.0 mm or Ø1.5" Post Clamps, M6 Threads
C1026/M130 mm Cage Clamp for Ø25.0 mm Posts
RS150/M1Ø25.0 mm Pillar Post, M6 Taps, L = 150 mm, M4 Adapter Included
A C15QR Quick-Release Handle can be used in place of the 1/4"-20 (M6) clamping screw for better control.
  • Quick-Connect Cage Clamps for 30 mm and 60 mm Cage Systems
  • Easy Drop-In and Drop-Out of Cage Systems
  • Single Locking Screw Allows One-Handed Operation
  • Compatible with Ø1" (Ø25 mm) Posts

The C1026(/M) and C1060(/M) Cage System Clamps for Ø1" (Ø25 mm) Posts are designed to support 30 mm and 60 mm cage systems, respectively. Two parallel cage rods can be placed in the clamp and locked in place with a single screw. In this way, complete cage system sections can be supported by a single post. The clamp itself can be secured to a Ø1" (Ø25 mm) post by tightening the highly stable flexure lock mechanism with a 3/16" (5 mm) balldriver.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
C1026 Support Documentation
C102630 mm Cage Clamp for Ø1" Posts
$75.48
Today
C1060 Support Documentation
C106060 mm Cage Clamp for Ø1" Posts
$83.90
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
C1026/M Support Documentation
C1026/M30 mm Cage Clamp for Ø25.0 mm Posts
$75.48
Today
C1060/M Support Documentation
C1060/M60 mm Cage Clamp for Ø25.0 mm Posts
$83.90
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
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