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Astro-Physics Mach1GTO Mount

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Product Description

Specifications of Equatorial Head

Worm Wheels - both axes

5.9" (150mm), 225 tooth aluminum

Worm gears

Brass, 0.709" (18mm) diameter

R.A. and Dec. thrust surfaces

4.1" (104mm) diameter


3.1" (78mm) diameter - 2 per axis

Periodic Error Maximum

7 arc seconds peak to peak, (+/- 3.5 arc sec.) or less in one worm cycle (6.4 minutes)

Axis Shaft Diameters

2.36" (60mm)

Latitude range

0 to 70 degrees

Azimuth adjustment

25 degrees (+/- 12.5 deg. from center)

Motor Power Consumption

400 mA - tracking
2 Amps - both motors slewing

Power Requirements

12V DC, 5 Amp. (Acceptable Range: 11.5 to 16V)


Approximately 45 lbs. (20kg) scope and accessories (not including counterweights), depending on length. Will accommodate Astro-Physics and similar fast refractors up to our 160mm f7.5 StarFire EDF, 8" - 11" SCT's and 6" - 8" Maks.
These are only guidelines. Some telescopes are long for their weight or very heavy for their size and will require a larger mount. Remember also that imaging requirements are more rigid than visual observation.

Weight of equatorial head

28.5 lbs (13.0kg); Declination axis is 11.5 lbs. (5.2kg); Right Ascension axis is 16 lbs.(7.3kg); Pier adapter is 1 lb. (0.5kg)

Counterweight Shaft 1.125" diameter X 14.5" long, 4.1 lbs. (29mm X 368mm, 1.9kg) This shaft uses the same 6 lb. and 9 lb. counterweights that were used with the 400, 600 and 800 series mounts.

Optional Counterweight Shaft (M1053-A) (must be purchased separately)

1.875" diameter X 10.70 " long, 7.7 lbs. (48mm X 273mm, 3.5kg) This shaft is the same diameter as the shaft for the 900 and 1200 mounts and uses the same counterweights as well as a 5 lb. counterweight produced especially for the Mach1GTO. Longer sizes and an extension are available. Requires Safety Stop (M12676).

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