At what payload weight do I need the ZWO Counterweight Bar for my AM5?
ZWO recommends using this counterweight bar and a separate counterweight for any imaging rig that weighs more than 28 lbs (13 kg). This ensures stable tracking, protects the mount's internal drive system from excessive strain, and provides a critical margin of safety.
What size counterweights fit the ZWO BC230 Counterweight Bar?
The counterweight bar has a standard 0.787" (20 mm) diameter. Any counterweight with a 20 mm bore will fit securely. This includes many common counterweights from other brands, such as the iOptron 10 lb Counterweight for the CEM25 mount.
Can I use this ZWO counterweight bar on a mount other than the AM5?
Yes, potentially. The bar uses a standard M12x1.75 male screw thread to attach to the mount. It is compatible with any mount that features a matching M12x1.75 female thread for its counterweight shaft.
I'm mounting a 30 lb Celestron C11 OTA on my ZWO AM5. Is this bar enough?
This bar is the necessary first component for that setup. For a 30 lb payload, you will need this 230 mm bar plus at least one 10 lb or 11 lb counterweight (sold separately) to achieve proper balance. Balancing is critical for maintaining the AM5's tracking accuracy with heavier telescopes.
Will the ZWO Counterweight Bar help balance a long refractor like a 130mm f/7, even if it's under 28 lbs?
While not strictly required for payloads under 28 lbs, adding a counterweight can significantly improve stability for physically long instruments. A long OTA creates a large moment arm, and balancing this with a counterweight reduces strain on the mount's gears, leading to smoother, more reliable tracking, especially in windy conditions.
How do I install the ZWO Counterweight Bar on the AM5 mount?
Installation is simple:
- Loosen the small locking screw located at the bottom of the AM5 mount head.
- Thread the counterweight bar into the mount base until it is hand-tight.
- Slide your counterweight(s) onto the bar and lock them in place.
