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Spindle bearings in the ABEC-9 class are one of the best ya can get , & the price confirms it . ??? animal

I agree they use cheapest they can find. Dave

There are downside tapper roller bearings. I have used and designed a lot of tapper roller bearings They are a pain to seal. This group per load is not problem but it is with most. Most forget about

If the necessary preloading is the cause of ball bearing failure then that makes a strong case for replacing with tapered roller bearings designed for preloading. wrote:

I totally agree - replace with a good 6206 from a competent manufacturer.

I would offer that "DEEP GROOVE" bearings do NOT have good axial load potential. plus The fact that the bearing 6206 seems to be big and chunky in your hand and by human force standards, when the

Probably the problem quality How cheap can you go Dave

It is a deep groove ball bearing This type has very good axial load They use type of deep groove on live centers too. Dave

They are not designed for heavy axial loads - like heavy (for a mini-lathe) cuts. -- Lone Tree, Colorado? ?USA

Agreed. Go for a known quality brand.? SKF or NSK as a couple of examples. Dave The Emerald Isle

Possibly because the bearing isn't the best match for the application.? Preload will eliminate all free play, axially speaking, and it is all too easy to over-do it.? Angular contact or tapered

I am not an engineer, but I believe that it has to do with preloading and heat. A motor may be exposed to a substantial amount of heat, but they have some free play to it, essentially allowing the

Cause its probably the cheapest 6206 bearing they could find . ??? animal

Maybe the axial loading when machining on a lathe? Of course, all the drill presses I've been inside of have ball bearings and most of their load is axial in spite of that. But maybe the axial forces

I have used the 6206 bearing in motors and doors. The life for a seal 6206 ball bearing is 20,000 to 60,000 hours. In a mini lathe a lot shorter. Why is it so short? Dave

Here something I found on the internet on portable DRO lathes.

Here few more photos. The 12" is the one I use most. The one bag is my new one that just got with a remote display. It has almost a 8".? The 5" was a little short. Each lathe and mill is a different

I just change lathe to mini lathe.. It is simple the DRO aluminum base has bracket to lathe bed. The other end use a mag base used for dial indicators. My new lathe lacks space for mag base. So just I

Very nice idea. Can you show some picture of how it works, and how you mount it ? I'm really interessed and was thinking to copy your idea ( if you don't mind ) Pierluigi

Here a side view of nut. Also option for adjustable nut too.