Astro-Physics 9.25" Counterweight Shaft Extension
The 9.25-Inch Long by 1.875-Inch Diameter Counterweight Shaft Extension by Astro-Physics:
The 9.25-Inch Counterweight Shaft Extension completes the current 1.875-inch diameter counterweight shaft ensemble. It eliminates the need for a separate longer shaft for those of you with heavier instruments. Like the other current 1.875-inch diameter shafts, the 9.25-inches Extension uses the Washerless Safety Stop (#AP-M12676) to protect your toes. Its fit to the primary counterweight shaft is virtually seamless, so your weights will slide up and down smoothly.
The extension is beautifully machined from the same 303 stainless stock as the full counterweight shafts and adds another 8.5-inches of usable length to your counterweight shaft. It can be used to extend the 10.7-inch (#AP-M1053-A) and 14-inch (#AP-M9404-A) counterweight shafts as well as the 19.5-inch model (#AP-M12601-D). The added length will accommodate roughly 60-pounds of additional counterweights as well as allowing your current weights to be levered out for balancing. It is compatible with Astro-Physics' 5-pound (#AP-5SCWT), 10-pound (#AP-10SCWT) and 18-pound (#AP-18SCWT) counterweights. The extension itself weighs 6.6-pounds. (3.0 kg).
The 9.25-inch Counterweight Shaft Extension has a shorter lead-in thread than the full counterweight shafts and should NOT be the piece that screws into the declination axis.
This shaft extension is recommended for the 1600GTO, all 1200 models and 900 models (HDA, QMD, SMD and GTO) that have been produced, but the mount must have the current style 1.875-inch diameter primary counterweight shaft. It may also be used with the Mach1GTO provided that an optional 1.875-inch diameter shaft has been purchased.
OPT Product Number: AP-M12675
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