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Thread Size For LXD75 Counterbalance Rod

NEM

By NEM
in DIY Astronomer

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NEM

NEM

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Does anyone know the thread size on the outer end of the counterbalance rod of a Meade LXD75 mount?  I suspect it's 5/16" diameter, as an M8 tap screws about half an inch into it and then sticks.  As for pitch, UNS (20 TPI) is closer to M8 (1.25 mm) than UNC (18 TPI) or UNF (24 TPI), but is UNS commonly used?

I need to get an extension bar made up to cope with a Skywatcher 200P.  If anyone else is using this set-up with the standard LXD75 weight, what length of bar do you use?

Noel

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