What bearings to use?

[Asoor]

Hey everyone, I'm planning on building a dob and I have a list of all the materials I need except for the bearings to rotate the telescope horizontally, what should I use? Thanks in advance.

[johninderby]

Good info here on the subject.

https://stellafane.org/tm/dob/mount/altbearings.html

Large alt bearings work much better than the small ones found on many dobs. Here’s my Bresser dob that has nice big bearings.

Edited July 31, 2021 by johninderby

[Asoor]

12 minutes ago, johninderby said:

Good info here on the subject.

https://stellafane.org/tm/dob/mount/altbearings.html

Large alt bearings work much better than the small ones found on many dobs. Here’s my Bresser dob that has nice big bearings.

Thanks a lot for the help but i meant the ones at the bottom of the mount, the ones that rotate the scope side to side.

[johninderby]

Ah OK, then this will be more usefull.

https://stellafane.org/tm/dob/index.html

[Asoor]

5 hours ago, johninderby said:

Ah OK, then this will be more usefull.

https://stellafane.org/tm/dob/index.html

Thanks a lot, appreciate it.

[Chaz2b]

I’m currently building up the materials for a home made dob base, and for the bottom bearing I’m using a 10” lazy Susan, very cheap on eBay, with Teflon pads on the altitude.

chaz

[johninderby]

Don’t forget when using a lazy susan bearing you will need to add something to add some drag or it will just spin round and be unusable. Felt pads or something similar will do.