German Equatorial Mounts
We offer 3 models of German equatorial mounts: MI-500G, MI-750G, and MI-1000G. Each mount consists of a polar assembly and a declination assembly. The conical polar assembly houses the right ascension axis, drive gear, and servo motor. The declination assembly bolts to the top on the RA axis, and it includes the declination axis, drive, gear and motor. The counter-weight shaft and counter-weight attach to the bottom of the declination assembly.
Polar Assembly Specifications
Model |
MI-500 & MI-500/750 |
MI-750 & MI-750/1000 |
MI-1000 & MI-1000/1250 |
| Base Plate | 10.5 inches round |
14.0 inches round |
15-inches x 21 inches |
| Altitude Adjustment | 8 degrees |
6 degrees |
6 degrees |
| Azimuth Adjustment | 8 degrees |
6 degrees |
5 degrees |
| Latitude Range | 25 to 56 degrees |
25 to 56 degrees |
25 to 56 degrees |
| RA Gear Dimensions | 12.1 inch diameter, 360 teeth, bronze or aluminum |
15.1 inch diameter, 450 teeth, bronze or aluminum |
20.1 inch diameter, 600 teeth, bronze |
| Worm Dimensions | 1.20 diameter, stainless steel, 30 diametrical pitch |
1.50 diameter, stainless steel, 30 diametrical pitch |
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| Diameter of RA axis | 100mm |
130mm |
160mm |
| North Bearing | 100mm x150mm |
130mm x 180mm |
160mm x 220mm |
| Height | 16 inches |
21 inches |
28 inches |
| Payload | 250 lbs, 114 Kg 180 lbs recommended |
350 lbs, 160 Kg 280 lbs recommended |
500 lbs, 227 Kg 400 lbs recommended |
| Weight | 100 pounds, 45 Kg |
140 pounds, 64 Kg |
220 pounds, 100 Kg |
| Color | White with Blue Tint |
White with Blue Tint |
White with Blue Tint |
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Declination Specifications
| Model | MI-500 |
MI-750 |
MI-1000 |
| Flange Diameter | 5.5 inches |
6 inches |
6.5 inches |
| Upper axis diameter | 7 inches |
8 inches |
10 inches |
| Declination Gear Dimensions | 10.1 inch diameter, 300 teeth, aluminum |
12.1 inch diameter, 360 teeth, bronze or aluminum |
15.1 inch diameter, 450 teeth, bronze or aluminum |
| Worm Dimensions | 1.20 diameter, stainless steel,
30 diametrical pitch |
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| Diameter of Dec Axis | 2.5 inches |
3 inches |
4 inches |
| Upper Bearing | 80mm x 100mm |
100mm x 125mm |
120mm x 150mm |
| OTA Interface | dovetail |
dovetail |
dovetail or custom plate |
| Overall Length | 24 inches |
30 inches |
40 inches |
| Weight | 90 pounds |
125 pounds |
180 pounds |
| Color | White with Blue Tint |
White with Blue Tint |
White with Blue Tint |
The MI-1000, MI-750, MI-500, and MI-400 Declination Assemblies