Adjustable Angle Mounting Plate

  • 180° of Movement in 15° Increments
  • Continuous Movement and 13 Discrete Positions


Related Items

Please Wait


  • 180° of Total Movement
  • 15° Increments Result in 13 Discrete Locations
  • Removable Pin for Angular Locating
  • Arrangement of Mounting Options as Seen in the Drawings to the Right

Thorlabs' Adjustable Angle Mounting Plate provides a full 180° of movement at 15° increments with ±18 arcmin precision. The mounting platform can be positioned at 13 discrete positions utilizing the included linchpin. Engravings on the mount denote the angular positions possible and the associated pin location for each position.

In addition to the 13 discrete positions available, the plate can be oriented at any angle by tightening the hex locking screw. However, the load capacity is limited to 8 lbs if the linchpin is not used. This adjustable angle plate contains an array of 1/4"-20 (M6) mounting holes and 1/4" (M6) slots on the top and bottom plates as shown in the drawings to the right.

To change the angle between the two plates, loosen the 1/8" (3 mm) hex locking screw located on the back of the mount (see animation below). Once the hex screw is loose, remove the locking pin. Rotate the top plate until the engraved white line on the top plate hinge matches up with the desired angular marking on the bottom plate hinge. Insert the pin into the slot indicated by the letter in parentheses next to the angular position you selected. For example, to secure the top plate at 45° past vertical as shown in the photo below, the pin must be inserted into the A slot. Once the pin has been inserted, tighten the hex locking screw to fully secure the position of the mount.

How to change the angle of the AP180
Click to Enlarge

An engraved scale indicates 15° increments as well as the appropriate linchpin slot to use for each angle.

This animation shows how the AP180 Adjustable Plate can be locked at different angles.

Posted Comments:
Karl Tolliver  (posted 2022-01-23 19:55:51.857)
Question: What is the load limit on the adjustable angle mounting plate using the linchpin? Thanks!
YLohia  (posted 2022-01-24 10:21:47.0)
The maximum load of 35 lbs at 60° is estimated for safety purposes and to remain within the ±18 arcmin precision spec. Loads up to 70 lbs have been shown to hold without failure, as the linchpin itself will take higher loads than the 35 lbs of "safety" load but this becomes unsafe and will not stay within the precision spec. Additionally, at ~70 lbs you may see bulging or wearing of the tapped holes.
Jessica Huber  (posted 2021-08-04 07:34:38.323)
AP180 Adjustable Angle Mounting Plate What material is this made out of?
YLohia  (posted 2021-08-05 01:21:58.0)
The main base, platform, and pivots are made of anodized aluminum. The minor components (such as dowel pins, washers, screws) are made of stainless steel.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
AP180 Support Documentation
AP180Adjustable Angle Mounting Plate
+1 Qty Docs Part Number - Metric Price Available
AP180/M Support Documentation
AP180/MAdjustable Angle Mounting Plate, Metric