Product Description
PLEASE NOTE – This mount is missing both the three spring-loaded fingers for securing optics on the reverse side of the gimbal mount AND the spring-loaded ring for conventional mirror mounting. Presently there is no means to secure the mirror within the gimbal short of cement. The spring-loaded rings from the much more common SL gimbal mounts will NOT work in these mounts.
This item is a Klinger Model SK Gimbal Mount for optics of 25mm diameter. These gimbals are somewhat more sensitive for mirror adjustment than the SL type gimbals. The SK mount is unusual in that there are two methods for securing optics or mirrors. The first method is similar to that found in the more common SL type gimbal mounts. There should be a spring-loaded ring with a pair of threaded posts to accommodate lenses or mirrors with edge thicknesses of up to 10mm. There is a recess in the gimbal mount machined for 51mm diameter lenses, with three precision bearing points that are perfectly matched to the common tilting planes for azimuth and elevation. The securing ring posts are slightly asymmetrical in order to allow easier exchange of the components via the larger of the openings. The minimum thickness for the mirror should be observed as the securing ring does not extend into the recess very far.
The second mode of mounting is for larger-than-specified 51mm mirrors. The recess on the opposite side of the ring mount is stepped and will accommodate mirrors in several sizes up to 78mm in diameter. The three spring-loaded arms (which are absent) would serve to secure the mirror into the appropriate recess. By reversing the mirrors so they face away from the mounting surface it is possible to use very steep grazing reflection angles.
Height & width of support– 80mm
Thickness of support – 25mm (30mm including gimbal plate)
Clear aperture – 22.5mm
Travel range (elevation and azimuth) – plus or minus 2 degrees
Minimum thickness for ring-mounting – 6.35mm
This particular mount is equipped with the Type BM standard micrometers for both the azimuth and elevation..
The mounts are in excellent condition. They do not come with any mounting plates or bases. Klinger part number (with BM micrometers) is 133 301.
Location MB 87
Photo set 722