what are counter weights made of?
Posted 07 May 2009 - 03:47 PM
im guessing steel?
Posted 07 May 2009 - 03:58 PM
ive got an extra one sitting here from a celestron eq1 mount and want to bore out the hole to use it on an eq3. not sure what its made of and if a regular drill and bit would work or if i need to take it to a machine shop for some more muscle.
im guessing steel?
Typically they are made of steel...some stainless.
If it is from an EQ1 it is probably steal and a good drill will do the job..or a boaring tool.
It's probably best to chuck it up in a lathe and drill it out that way...you may get a significant amount of drill vibration if you attempt it by hand. But I bet it is still possible. Where there is a will...there is a way.
Rob(my opinion anyway)
Posted 07 May 2009 - 07:32 PM
Posted 07 May 2009 - 07:34 PM
I did use a large drill bit in my drill press to bore out a couple of cast iron weights. Worked OK, but had to go slow and the cut was not perfectly smooth due to the cast iron, but it works fine.
I also had two bored with a lathe, that did a little better job, but not that much better really.
Posted 07 May 2009 - 07:57 PM
Posted 07 May 2009 - 11:14 PM
Most of the ones with the rough finish are usually cast iron. A drill press, milling machine or lathe are the safest way to enlarge the hole. Cast iron must me machined DRY! Do NOT use oil or you could cause it to harden while drilling or boring.
The really good ones are made from SS. Those are obvious so we can rest assured that you don't have on made from SS.
Posted 15 May 2009 - 06:23 PM
Hope this is helpful.
Posted 15 May 2009 - 07:00 PM
I had four 11 pounders bored out to fit my new 1 inch shaft.
The machinist that did it told me they were all made of Cast Iron.
BTW: 2 were from my old ASGT and the other two were from my new Sky Watcher EQ-6 Pro.
He told me they were NOT EASY to do, but, as Rob said, when there's a will.....
Posted 16 May 2009 - 12:55 PM