This is an interesting product that is unfortunately hamstrung by easily fixable design flaws. The cockamamie 6.78 degree offset between the counterbored mounting holes & the position of the rotating part's index mark when registered against any of the fixed 8 locations for stop#1 makes it impossible to use these stops to reference any of the 4 cardinal "compass" points (i.e. 0, 90, 180, & 270 degrees) without the index mark reading 6.78 degrees off these points. Given the rectilinear hole pattern most common on breadboards & other "stuff" you might want to integrate into an assembly, this situation practically forbids use in any assembly where a technician is asked to follow a work instruction that requires accurate reading of this stage's angular position wrt to another rectilinear coordinate system. 2 possible fixes include: 1. (preferred) 8 additional 4_40 tapped holes to position a fixed stop such that when registered against the stop, the index mark coincides with either the 0, 90, 180, or 270 orientation wrt to the base mounting hole pattern), or (less desirable) 2. the addition of a rotating scale pattern that the user can set and then lock down, such as you implement in several of your rotation stages for 1" & 2" optical components. My preferred solution (#1) would likely require rethinking the geometry of the four areas in the base that are relieved to enable external clamps to grab the base, however, with the angular offset problem fixed, I expect the need for external clamping would mostly disappear. Just my $0.02.

Our research group owns one of these, and we are curious if there is a maximum temperature allowance for this product. I could not see any information online. Are there any plastic elements maybe inside that could be damaged? Thank you so much, -Kyle