Ø1.5" Post Holders


  • Holds Ø1.5" Pillar Posts
  • Pedestal Style or Post Holder Options
  • Compatible with 1/4"-20 or
    M6 Caphead Screws

LPH200

Rigid Stand Post Holder with Included Post Collar

Application Idea

LPH100 Ø1.5" Post Holder with Post and C1526 10 mm Cage Clamp Mount

PB4

Studded Pedestal Base Adapter

PF175B Clamping Fork Securing a Ø1.5" Post with a PB4 Base Adapter

Related Items


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Features

  • Post Holder or Pedestal Style Clamp for Ø1.5" Posts
  • Post Holder with Quick-Release and Height Collar
  • Pedestal Bases Compatible with PF85B, PF125B, or PF175B Clamping Forks
  • Adapter Plate for Mounting Rigid Stand Post Holders on Translation Stages

Thorlabs' Ø1.5" Post Holders and Pedestal Clamping Fork are ideal solutions for mounting our Ø1.5" posts to a breadboard or optical table. While our line of Ø1.5" posts covers a range of fixed heights, the post holders allow more height flexibility and mounting options. The sturdy 66 mm construction rail body and broad 3.00" (76.2 mm) × 3.52" (89.3 mm) base provide superb stability and solid mounting. Counterbored slots in the base allow the post holder to be directly mounted with 1/4"-20 (M6) caphead screws. A taller post holder should be used with a longer post holder in order to obtain the greatest stability.

Alternatively, the PB4(/M) and PB4R(/M) Pedestal Base Adapters allow the user to secure a Ø1.5" post through use of a clamping fork. They have 1/4"-20 (M6) threaded studs that are designed to thread onto the bottom of our Ø1.5" posts. These adapters are compatible with our PF85B, PF125B, or PF175B clamping fork, which creates three points of contact with the table for high stability. The PB4R(/M) adapter has four high strength magnets in the base that are sufficiently strong to securely hold the base in place without clamping to an optical table.

We also offer a post holder adapter plate that allows users to mount a rigid stand post holder on translation stages that have four 1/4"-20 (M6) tapped holes with 1" spacing and a sufficient load capacity to support a post holder and additional components. Be sure to check a stage's specifications to determine compatibility. The combination of the adapter plate and a translation stage provides a manual solution for easily translating a post holder within a setup.


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Ø1.5" Post Holders

Rigid Stand Post Holder Mechanical Diagram
Click to Enlarge

Mechanical Drawing

Thorlabs' Ø1.5" Post Holders provide a rigid and stable mounting solution for our Ø1.5" posts. They are offered in four stand heights (see mechanical drawing to the right for additional details) to meet the specific requirements of any system. Each post holder features a quick-release handle that locks and unlocks a Ø1.5" post. The included post collar with an alignment pin can be used to maintain a post's height during its rotation. The alignment pin acts as a hard mechanical stop that lets you quickly return to a previously set angle.

The base can be secured to a tabletop via four counterbored slots that accept 1/4"-20 (M6) cap screws. The base is also compatible with the MPA1(/M) adapter plate (sold below) that allows a post holder to be mounted on a translation stage; see the images below.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
LPH100 Support Documentation
LPH100Rigid Stand Post Holder, L = 100 mm
$375.50
Today
LPH150 Support Documentation
LPH150Rigid Stand Post Holder, L = 150 mm
$390.65
5-8 Days
LPH200 Support Documentation
LPH200Rigid Stand Post Holder, L = 200 mm
$404.71
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LPH250 Support Documentation
LPH250Rigid Stand Post Holder, L = 250 mm
$419.86
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Ø1.5" Post Pedestal Base Adapter and Clamping Fork

BE1 INcludes a Hex Key for Mounting
Click to Enlarge

The PF175B Secures a Ø1.5" Post to an Optical Table with a PB4 Base.
P2 with PB4
Ø1.5" Post Shown with PB4 Base

Each PB4(/M) and PB4R(/M) Pedestal Base Adapter has a threaded 1/4"-20 (M6) stud that is designed to thread onto the bottom of our P-Series Posts. For instance, the image to the right shows a P2 post with a PB4 pedestal base. The PB4(/M) can be tightened onto the post or postholder using a 1/8" (3 mm) hex key or ball driver, while the PB4R(/M) has a 3/16" (5 mm) hex socket as well as four high strength magnets in the base that are sufficiently strong to securely hold the base in place without clamping to an optical table.

The PB4(/M) and PB4R(/M) adapter allows our PF85B, PF125B, and PF175B clamping forks to be used to position the post assembly conveniently on your optical bench. These clamping forks create three points of contact with the table for high stability. For flexibility in the positioning of post assemblies, Thorlabs offers three sizes: the PF85B fork has a 0.85" (21.6 mm) long counterbored slot, the PF125B fork has a 1.25" (31.8 mm) long counterbored slot, and the PF175B fork has a 2.12" (53.8 mm) long counterbored slot. They are available individually or in packs of five.

Please note that significant overtightening of clamping forks can deform the surface of an optical table, which can cause misalignment of components and decrease stability of the clamping fork.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
PB4 Support Documentation
PB4Ø1.85" Studded Pedestal Base Adapter, 1/4"-20 Thread
$13.74
Today
PB4R Support Documentation
PB4RNEW!Ø1.85" Magnetic Studded Pedestal Base Adapter, 1/4"-20 Thread
$25.00
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+1 Qty Docs Part Number - Universal Price Available
PF85B Support Documentation
PF85BNEW!Clamping Fork for Ø1.5" Pedestal Post or Post Pedestal Base Adapter, 0.85” Counterbored Slot, Universal
$12.00
Today
PF85B-P5 Support Documentation
PF85B-P5NEW!Clamping Fork for Ø1.5" Pedestal Post or Post Pedestal Base Adapter, 0.85” Counterbored Slot, Universal, 5 Pack
$55.00
Today
PF125B Support Documentation
PF125BNEW!Clamping Fork for Ø1.5" Pedestal Post or Post Pedestal Base Adapter, 1.25” Counterbored Slot, Universal
$15.00
Today
PF125B-P5 Support Documentation
PF125B-P5NEW!Clamping Fork for Ø1.5" Pedestal Post or Post Pedestal Base Adapter, 1.25” Counterbored Slot, Universal, 5 Pack
$70.00
Today
PF175B Support Documentation
PF175BClamping Fork for Ø1.5" Pedestal Post or Post Pedestal Base Adapter, 2.12” Counterbored Slot, Universal
$17.00
Today
PF175B-P5 Support Documentation
PF175B-P5Clamping Fork for Ø1.5" Pedestal Post or Post Pedestal Base Adapter, 2.12” Counterbored Slot, Universal, 5 Pack
$80.00
Today
+1 Qty Docs Part Number - Metric Price Available
PB4/M Support Documentation
PB4/MØ1.85" Studded Pedestal Base Adapter, M6 x 1.0 Thread
$13.74
Today
PB4R/M Support Documentation
PB4R/MNEW!Ø1.85" Magnetic Studded Pedestal Base Adapter, M6 x 1.0 Thread
$25.00
Today

Post Holder Adapter Plate

LX Stage with Rigid Stage Adapter
Click to Enlarge

View Imperial Product List
Item #QtyDescription
LX101Self-Contained 25 mm Translation Stage, 1/4"-20 Taps
LPH2001Rigid Stand Post Holder, L = 200 mm
MPA11Rigid Stand Adapter Plate, 1/4"-20 Taps
SH25S03811/4"-20 Stainless Steel Cap Screw, 3/8" Long, 25 Pack
W25S05011/4" Washer, M6 Compatible, Stainless Steel, 100 Pack
View Metric Product List
Item #QtyDescription
LX10/M1Self-Contained 25 mm Translation Stage, M6 x 1.0 Taps
LPH2001Rigid Stand Post Holder, L = 200 mm
MPA1/M1Rigid Stand Adapter Plate, M6 Taps
SH6MS101M6 x 1.0 Stainless Steel Cap Screw, 10 mm Long, 25 Pack
W25S05011/4" Washer, M6 Compatible, Stainless Steel, 100 Pack

The MPA1 Adapfter Used to Mount an LPH200 Post Holder onto an LX10 Translation Stage.
LX Stage with Rigid Stage Adapter
Click to Enlarge

View Imperial Product List
Item #QtyDescription
XRN25P-K11Preassembled Compact XY 25 mm Translation Stage, Side Micrometers, 1/4"-20 Taps
LPH1501Rigid Stand Post Holder, L = 150 mm
MPA11Rigid Stand Adapter Plate, 1/4"-20 Taps
SH25S03811/4"-20 Stainless Steel Cap Screw, 3/8" Long, 25 Pack
W25S05011/4" Washer, M6 Compatible, Stainless Steel, 100 Pack
View Metric Product List
Item #QtyDescription
XRN25P-K1/M1Preassembled Compact XY 25 mm Translation Stage, Side Micrometers, M6 x 1.0 Taps
LPH1501Rigid Stand Post Holder, L = 150 mm
MPA1/M1Rigid Stand Adapter Plate, M6 Taps
SH6MS101M6 x 1.0 Stainless Steel Cap Screw, 10 mm Long, 25 Pack
W25S05011/4" Washer, M6 Compatible, Stainless Steel, 100 Pack

The MPA1 Adapter Used to Mount an LPH150 Post Holder onto a XRN25P-K1 Translation Stage.
  • Mount a Rigid Stand Post Holder onto a Translation Stage
  • Matches the Compact Footprint of Post Holder
  • Four 1/4" Counterbored Holes for Mounting to a Translation Stage
  • Four 1/4"-20 (M6) Tapped Holes for Mounting a Post Holder

The MPA1(/M) Rigid Stand Post Holder Adapter Plate allows users to mount a post holder onto a translation stage that has four 1/4"-20 (M6) tapped holes with 1" spacing and a sufficient load capacity to support a post holder and additional components. Be sure to check a stage's specifications to determine compatibility. The combination of the adapter plate and a translation stage provides a manual solution for easily translating a post holder within a setup.

To assemble, attach the adapter plate onto the translation stage via the four 1/4" (M6) counterbored holes that accept 1/4"-20 (M6) cap screws. Then mount the rigid stand onto the adapter plate using the four 1/4"-20 (M6) tapped holes; see the images 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
MPA1 Support Documentation
MPA1Customer Inspired! Rigid Stand Adapter Plate, 1/4"-20 Taps
$32.96
Today
+1 Qty Docs Part Number - Metric Price Available
MPA1/M Support Documentation
MPA1/MRigid Stand Adapter Plate, M6 Taps
$32.96
Today