Jump to content


Orion Optics dobsonian friction brake

Recommended Posts

Hi all, anyone have a friction brake on their O.O. dob like this :-

Dobsonian Mount

Its at the bottom of the page. I'm wondering how well the friction

brake works, I may make a DIY version. Looks like a thick teflon

pad, plus ally bar & handwheel ( all in my shed )

Any feedback appreciated, before I attack that nice aluminium

mount ;)

Best Regards, Ed.

Link to comment
Share on other sites

Yes I have one, although I don't use it as it's not needed with the StellarCAT system.

It does work very well though. There are actually two arms on it, one inside the frame and one outside. On one end of each arm there is an adjustable grub screw with a pointed end that fits into a hole in the frame. On the other end of each arm there is a Teflon disk. About in the middle of the arms is a threaded bolt that fits right through the frame. Tightening this bolt clamps the Teflon disks on the rings.

Simple concept but it works. One thing to note though is that this type is used on the medium to large dobs only. On the small dobs a different type is used but you'll be able to check by looking at the pics for each size dob on the OO website.


Link to comment
Share on other sites

Thanks John for that detailed reply. So there's more to it than the pic shows,

with an inner arm too.

I may stay with a removable counterweight that I've made. I know you can slide

the OTA within the tube rings, but that's a hassle when swapping between

EPs that are very different in weight. And that doesn't work when viewing at a high

elevation, when with a heavy EP the tube is unbalanced radially, not along its length,

& the tube tries to drift higher. The counterweight sorts that issue.

Thanks again John, regards, Ed.

Link to comment
Share on other sites

I agree this works well. I have one on my 12" dob but have also created a simple counterweight system as this is easier and prevents the slight stickiness I sometimes get with the brake - this might be solved though with some furniture polish on the teflon disks - not been bothered to do this yet ;)

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.