开云体育

The ABEC rating mostly refers to tiny differences in runout, with higher numbers being microscopically more precise & astronomically pricier. <

20 bucks gets ya a 4" digital at Harbor Freight a couple bucks more gets ya the 6"

I have purchased the ABEC-9 class for rebuilding a mill head. The ball bearings companies low that class. I think I could buy new lathe cheaper. Dave

I've always thought it was from improper pre-load! Getting the pre-load right is finicky & usually requires several iterations to get right, something not done by the factory.? What you want is no

If look at photo of my mill I used a low cost digital caliper from Harbor Freight Dave

Try my thread on portable DRO'S. /g/7x12MiniLathe/message/118787 I have mounted a temp DRO'S to lathe pass for primary dealing with snap rings. Low cost digital caliper can used too.

> > > Just the quality of mini lathe if spent $10.00 lathe upgrade on Spindle bearings 4" crosss feed travel and DC power feed The wholesale price of lathe is $300.00 retail is $600.0 a incress the

I am looking for some short linear digital scales to mount on a small lathe like a Shereline. I am hoping to find something on the order of “cut-off” digital caliper. Could anyone suggest a good

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