Ø1.5" Post V-Clamp Mounts

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Item #	Qty	Description
C1512	2	Post V-Clamp Mount, One PM4 Clamping Arm Included
HNL050L	1	HeNe Laser, 632.8 nm, 5 mW, Polarized, 120 VAC Power Supply Included
P6	2	Ø1.5" Mounting Post, 1/4"-20 Taps, L = 6"
PB1	2	Mounting Post Base, Ø2.48" x 0.40" Thick
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View Metric Product List

Item #	Qty	Description
C1512/M	2	Post V-Clamp Mount, Metric, One PM4/M Clamping Arm Included
HNL050L	1	HeNe Laser, 632.8 nm, 5 mW, Polarized, 120 VAC Power Supply Included
P150/M	2	Ø1.5" Mounting Post, M6 Taps, L = 150 mm
PB1	2	Mounting Post Base, Ø2.48" x 0.40" Thick
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HeNe Laser Mounted on Two C1512 V-Clamps and Ø1.5" Posts

• ±10° of Coarse Pitch Control
• Accepts Cylindrical Objects Ranging in Diameter from 0.33" to 2.04" (6.5 mm to 51.9 mm)
• Includes Quick-Release Handle for Easy Mounting to Ø1.5" Posts
• One PM4(/M) Clamping Arm Included

This mount includes one PM4(/M) Clamping Arm, which may be fastened at any of three positions along the outer edge of the V-clamp. Additional PM4(/M) clamping arms are sold below.

• Kinematic Knobs Provide ±3° of Pitch and Yaw Control
• Accepts Cylindrical Objects Ranging in Diameter from 0.28" to 2.04" (6.7 mm to 51.9 mm)
• Includes Quick-Release Handle for Easy Mounting to Ø1.5" Posts
• One PM4(/M) Clamping Arm Included

The C1513(/M) Post Kinematic V-Clamp Mount accepts cylindrical objects ranging in diameter from 0.28" to 2.04" (6.7 mm to 51.9 mm), such as HeNe Lasers, High-Magnification Zoom Lenses, and Laser Diode Modules. The two kinematic knobs provide fine control of tip and tilt within a ±3° range and an adjustment per revolution of 6 mrad/rev. 

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.

This mount includes one PM4(/M) Clamping Arm, which may be fastened at any of three positions along the edge of the clamp. Additional clamping arms are sold below.

The kinematic mechanism consists of a series of hardened chromium steel balls and ball seats that are coupled to heavy-duty springs. This mechanism works with gravity and provides long-term stability.

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Clamping Arm Extension Posts with Metric Indicator Groove

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Mechanical Drawings

• Provide Clamping Force for Our Platform Mounts
• 6-32 (M4) Threads on Top and Bottom of Post
• PM3(/M): Holds Optics up to 0.97" (24.6 mm) Tall
• PM4(/M): Holds Optics up to 1.61" (40.9 mm) Tall
• Extension Posts Available to Increase Max Optic Height
  • PM3SP(/M) with PM3(/M): Hold Optics up to 2.21" (56.1 mm) Tall
  • PM4SP(/M) with PM4(/M): Hold Optics up to 3.61" (91.7 mm) Tall

Thorlabs' PM3(/M) and PM4(/M) Clamping Arms use a nylon-tipped setscrew with a 5/64" (2.0 mm) hex to secure optics to our kinematic platform mounts and V-clamps. The PM3(/M) accommodates optics up to 0.97" (24.6 mm) tall and features a 0.69" (17.5 mm) center-to-center distance between the post and the nylon-tipped setscrew. In contrast, the PM4(/M) accommodates optics up to 1.61" (40.9 mm) and features a 1.16" (29.3 mm) center-to-center distance between the post and the nylon-tipped setscrew. The maximum optic height of the PM3(/M) or PM4(/M) Clamping Arms can be extended using our PM3SP(/M) or PM4SP(/M) Extension Posts, respectively. These extension posts are identical to the posts included in each complete clamping arm.

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.

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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 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.