Ø1" Post V-Clamp Mounts

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All Mounting Holes on the C1012(/M) V-Clamp Mounts

• Secure Cylindrical Objects with Included PM3(/M) Clamping Arm
  • Clamping Arm Mounted in Central Location (See Image to the Right): Ø0.03" to Ø0.94" (Ø0.8 mm to Ø24.0 mm)
  • Clamping Arm Mounted Outer Location: Ø0.38" to Ø1.19" (Ø9.8 mm to Ø30.3 mm)
• Use PM4(/M) Clamping Arm (Available Separately Below) to Hold Ø1.10" to Ø1.88" (Ø28.1 mm to Ø47.7 mm) Cylindrical Objects
• Includes Quick-Release Handle for Easy Mounting to Ø1" Posts
• ±10° of Coarse Pitch Control

The C1012(/M) Post V-Clamp Mount allows a cylindrical component to be secured to a Ø1" post. The mount includes one PM3(/M) clamping arm, which can be mounted in one of three 6-32 (M4 x 0.7) threaded holes along the outer edge of the mount (see the drawing to the right). The center mounting hole is recessed, allowing the clamp to secure objects as small as Ø0.03" (0.8 mm). The two other mounting holes are at the top edge of the V; when the PM3(/M) is positioned in one of these holes, the clamp can accommodate objects from Ø0.38" to Ø1.19" (Ø9.8 mm to Ø30.3 mm), such as our Ø1/2" Lens Tubes. Two additional 6-32 (M4 x 0.7) mounting holes on the opposite side of the V allow a PM4(/M) clamping arm (available separately below) to be used to hold cylindrical objects as large as Ø1.88" (Ø47.7 mm), including Ø1" Lens Tubes, HeNe Lasers, Laser Diode Modules, Variable Optical Beam Expanders, and High-Magnification Zoom Lenses.

Coarse pitch adjustment is enabled by loosening two 9/64" (3.0 mm) hex locking screws that secure the V-clamp to the Ø1" (Ø25.0 mm) flexure clamp's front plate. The screws can slide along slots in the plate for up to ±10° of pitch adjustment. The two locking screws should be tightened to secure V-clamp at the desired angle.

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

Additional clamping arms and quick-release handles are also available separately below.

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Mechanical Drawings

• Provide Clamping Force for Our V-Clamps and Platform Mounts
• 6-32 (M4 x 0.7) Threads on Top and Bottom of Post
• PM3(/M): Up to 0.97" (24.6 mm) Vertical Space Below Clamp
• PM4(/M): Up to 1.61" (40.9 mm) Vertical Space Below Clamp

Thorlabs' PM3(/M) and PM4(/M) Clamping Arms use a nylon-tipped setscrew with a 5/64" (2.0 mm) hex to secure components or optics in our V-clamps or to our platform mounts. The PM3(/M) provides up to 0.97" (24.6 mm) of vertical space below the clamping arm and a 0.69" (17.5 mm) center-to-center distance between the post and the nylon-tipped setscrew. In contrast, the PM4(/M) provides up to 1.61" (40.9 mm) of vertical space below the clamping arm and a 1.16" (29.3 mm) center-to-center distance between the post and the nylon-tipped setscrew.

The clamping arm for all items is held to the post using a flexure mechanism that locks with a 5/64" (2.0 mm) balldriver or hex key. The post also offers a through hole for added torque when tightening down the post. Please see the diagram above for additional information.

• Quick-Release Handles Allow Post Clamps to be Easily Repositioned
• 1.44" (36.5 mm) Long
• Provides More Control and Feel when Locking and Unlocking a Clamp
• Handles can be Rotated Without Actuating the Locking Screw
• 1/4"-20 (M6 x 1.0) Threads

The C10QR(/M) Quick-Release Handle provides a simple and reliable way of securing a flexure-based Ø1" (Ø25.0 mm) 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 1.44" (36.5 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 the image to the right, then rotate it to a more convenient position. This feature ensures that the handle will always be accessible to the user. 

*Note the C10QR(/M) is not compatible with the C1026(/M) and C1060(/M) Cage System Clamps for Ø1" Posts. Visit the full quick-release handle presentation for additional compatibility information.