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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

50/50.8mm English Tapped Platform

Stock #58-866
Qty 1-4
Qty 5+
Volume Pricing
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Adjustable - Tip-Tilt
Aluminum Plates, Stainless Steel Screws, and Brass Thread Bushings
Type of Optics:
Square or Rectangular
Size of Compatible Optics (mm):
50.8 (Max.)
Plate Size (mm):
50.8 x 50.8
Plate Type:
English, ¼-20 Tapped
Thickness of Front Plate to C'bore (mm):
Thickness of Front Plate to Back Plate (mm):
Number of Adjustment Screws:
Adjustment Screw Pitch (mm):
Fine Tilt Angle (°):
Fine Tip Angle (°):
Travel (mm):
Z-Axis: 8
Angle Tolerance (°):
0.4 per 0.25mm turn
Sensitivity per 1° Knob Rotation (arcsec):
Thermal Stability (μrad):
Pointing Stability (μrad):
Compatible Post:
M4 x 0.7, 8-32

Regulatory Compliance

Not Compliant

Product Family Description

  • Fine Adjustment Screw Threads: 100 TPI
  • Removable Turning Knobs for Hex Key Access
  • Lockable Adjustment Screws

Our family of TECHSPEC® Kinematic Mounts includes both Optical Mounts and Mounting Table platforms. Each Mount features high accuracy adjustment screws in either 2-Adjustment screw or 3-Adjustment screw versions. 3-screw versions allow for additional translation in the optical axis. Optical holders are available for the most common sizes of English or metric optical components. In addition, C-Thread and T-Thread versions are compatible with our well-known line of mounting components, offering more than 30 additional mounting size options. Horizontal Adapters allow for quick conversion and maximized clear apertures (19.05 & 38.1mm diameters).

Adjustment Knobs are removable for Allen Key adjustment (2mm key size). Locking nylon-tipped set-screws are all common for easy adjustment (1.5mm hex key included).

Construction materials ensure quality and repeatability. Stainless steel inserts are used for all adjustment screw contact surfaces (compared to commonly used cheaper frame cuts or steel rods, or only one steel contact surface). Specially designed dampening grease for our adjustment screws provides smooth movement and a quality "feel". Nylon contact rods and screws ensure your optical components are not chipped. Brass bushings provide long-term durability with our stainless steel screws.

These mounts are designed to connect to our TECHSPEC® Metric Stainless Steel Mounting Posts. When the male-thread adapter is removed from the post, either an M4 or 8-32 tapped hole is available to accept the post-mounting screw from the mount.

TECHSPEC® Optical Mount Accessories available to easily integrate TECHSPEC® Kinematic Table Platforms into a variety of application setups.