Mirror Box & Trunions
 
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Mirror box components   Mirror box components
Component parts of Mirror Box - all corner joints are tongue and groove design   Low profile box constructed of laminated 1/2" Birch plywood for a nominal wall thickness of one inch. 
 
Mirror box truss clamping blocks   Mirror box shutter
Machined Maple hardwood truss tube clamping blocks - all hardware is "captured" to prevent any loose parts falling on primary - Note additional corner reinforcement under each block set   ABS plastic shutter.  Collimation guide dot on handle - Ample clearance provided between mirror box and center pivot for encoder installation.
 
  Mirror box trunions  
  Trunions are pre-drilled and lined with 1/4" bushing on each side - Thumb screw installed on each side for easy installation of encoder  
 
Mirror box trunions   Mirror box trunions
Both trunions have Formica laminate on both sides providing durable protection. 
 
  Mirror box trunions aluminum inlay

Both trunions have a recessed channel for the aluminum inlay that provides a smooth, durable altitude bearing surface.

  The channel is machined to close tolerance to virtually eliminate all lateral movement of the mirror box

All altitude ball bearings are 1/2' W X 1 1/2" OD

Note flush/close tolerance positioning of the trunion to the rocker box

 

 
 
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