Ø1.5" Post Clamps with Tapped Mounting Surface

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Figure G1.2  C1511(/M) Post Mounting Clamp Front Plate Schematic

Thorlabs' C1511(/M) Post Mounting Clamp features a removable front plate that provides a variety of tapped holes and counterbores. This post clamp and mounting plate combination has been designed to work in conjunction with our popular Ø1.5" Posts. 

This clamp features a quick-release handle for securing the clamp to a post. The 2.03" (51.4 mm) long handle contains a 1/4"-20 (M6) threaded stud that engages the part by simply rotating the handle. An internal ratchet-type mechanism allows for the handle's rotational position to be adjusted without actuating the mounting stud.

In Figure G1.2, the locations of the tapped and counterbored holes are called out by letters, while the dimensions and type of each hole are listed in Table G1.1.

• Identical to Plate Included with C1511(/M) Post Clamp
• Allows Easy Exchange of Setups

This adapter plate gives additional versatility to the C1511(/M) Mounting Post Clamp by allowing assemblies on the adapter plates to be swapped. As shown by Figure G1.2, it contains a generous distribution of 8-32 and 1/4"-20 tapped holes and #8 and 1/4" counterbores.

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Figure G3.2  Schematic of the C1545(/M) Post Mounting Clamp Front Plate. Dimensions for the metric clamp front plate are given in parenthesis.

Thorlabs' C1545(/M) Post Mounting Clamp features a removable front plate that provides a variety of tapped holes and counterbores. This post clamp and mounting plate combination has been designed to work in conjunction with our popular Ø1.5" Posts. 

This clamp features a quick-release handle for securing the clamp to a post. The 2.03" (51.4 mm) long handle contains a 1/4"-20 (M6) threaded stud that engages the part by simply rotating the handle. An internal ratchet-type mechanism allows for the handle's rotational position to be adjusted without actuating the mounting stud.

In Figure G3.2, the locations of the tapped and counterbored holes are called out by letters, while the dimensions and type of each hole are listed in Table G3.1.

• Identical to Plate Included with C1545(/M) Clamp
• Allows Easy Exchange of Setups

This adapter plate gives additional versatility to the C1545(/M) Large Mounting Post Clamp by allowing the assemblies on the adapter plates to be swapped. As shown by Figure G3.2, it contains a generous distribution of 1/4"-20 tapped holes and #8 and 1/4" counterbores.

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Figure 247A PSHA on a Ø1.5" Post Below the C1515 Mounting Post Bracket

• 0.025" (0.64 mm) Travel per Revolution
• 0.32" (8.2 mm) Vertical Adjustment Range

The PSHA(/M) Adjustable Height Ø1.5" Post Collar offers a convenient height adjustment for post mounted hardware. An easy-to-access actuator ring allows fine height adjustment at 0.025" (0.64 mm) per revolution. This collar also allows components to be freely rotated without changing height.

To use, slip the collar over a Ø1.5" post and hold at the desired height. Tighten the 1/4"-20 (M6) cap screw to secure the collar's position on the post via the flexure clamp. Place an optomechanic around the post on top of the collar and twist the actuator ring to adjust the component's height. The height can be locked by tightening the 8-32 setscrew with a 5/64" (2 mm) hex. The nylon ring on top of the collar prevents marring while adjusting the height.

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Figure 528A
Left: C15QR Quick-Release Handle Being Attached to the C1511 Post Mounting Clamp
Right: Pull Back to Rotate the Position of the Handle

• Quick-Release Handle for Fast and Repeated Positioning of Post Clamps
• Compatible with Ø1" (Ø25.0 mm) or Ø1.5" Post Clamps that Incorporate a 1/4"-20 (M6) Clamping Screw
• Provides More Control and Feel when Locking and Unlocking a Clamp
• Handle can be Rotated Without Actuating the Locking Screw
• 1/4"-20 (M6) Threads

The C15QR(/M) Quick-Release Handle provides a simple and reliable way of securing a flexure-based Ø1" (Ø25.0 mm) or Ø1.5" post clamp. In many cases a cap screw is used to lock a flexure-based clamp in place on a post, which requires a balldriver for adjustments. Depending on the mounted load, using a balldriver can be difficult, or even unsafe. This quick-release handle mitigates this problem by allowing the clamp to be hand-tightened, ensuring better control over the amount of torque applied to tighten or loosen the clamp. This also decreases the amount of time needed for basic setup and alignment by eliminating the need for additional balldrivers and allowing for a quick way to secure a clamp.

Easily installed by replacing the 1/4"-20 (M6) locking screw in a post clamp, the 2.03" (51.4 mm) long handle contains a 1/4"-20 (M6) threaded stud that engages a part by rotating the handle. Once the handle is tightened to secure a clamp to a post, the internal ratchet-type mechanism allows for the handle's rotational position to be adjusted without actuating the mounting stud. Simply pull the handle outwards to disengage it from the mounting stud, as shown in Figure 528A, then rotate it to a more convenient position. This feature ensures that the handle will always be accessible to the user.