[RicknBeachcrest]

Greetings all,
I'm still doing research on my router. My last piece of the puzzle is the lead screw and now the bearings that will support it. It seems like the best solution would be to use Angular Contact bearings, but the price always seemed to put them outside of the budget.

I did a quick search on ebay and found these. Like they say: if it seems to good...

5200ZZ Bearing 10mm x 30mm x 14.3 Angular Contact mm - eBay (item 140209398939 end time Jan-06-11 07:41:00 PST)

So will these work?

Thanks.
Rick

[wireb]

General bearing comment I would stay away from the shielded (ZZ) bearings unless you have active greasing or direct chip exposure. A better option would be the 2RS sealed. They will have a rubber lip sealing the grease in and last longer.

Again if you have chips bouncing off them then the shielded version is a better choice. Any chips / Dirt that is driven into the sealed version will rip up the rubber seal and eliminate any benefits it gave.

[ger21]

I plan on using the rubber seal version on my next machine.

5200-2RS Bearing 10x30x14.3 Angular Contact:Sealed:Ball Bearings

[RicknBeachcrest]

I appreciate the input.

Would you use one on the drive end (with a radial bearing on the non-drive end) or two (one on each end of the screw)?

Rick

[ger21]

Depends on the application.

If you want to use 2, and use both as thrust bearings, you need to be really precise in your fabrication.

What kind of screws are you using?

My plan is to use a single bearing for a Z axis screw, with the other end supported by the but only. But it's not that long.

[eigstein]

5200 series bearings check out www:bearingoutlet.com/sitemap.htm i have found them to be a good source .

[RICHARD ZASTROW]

Only my 2 cents, 14 deg. contact angle is more of a radial bearing than a thrust bearing. Ball Screw support bearings are usually 60 deg., sometimes 40/45 deg. acting as a thrust bearing in pairs for bi-directional thrust.

IMHO, use a pair of A/C bearings on the drive end. If needed, use a "floating" radial bearing on the non-driving end.

We're currently building a very light duty machine that will use sealed 25 deg. A/C bearings for ball screw support. (I have my fingers and everything else crossed) LOL

You're right, they are pricey!!!!

Dick Z

ref.#6 above, 5200 series double row A/C bearings have axial clearance built into them. N/C Cams, (MHRIP), chewed me out for asking about them some time ago.

[RicknBeachcrest]

Depends on the application.

What kind of screws are you using?
.

My plan is to use Roton ball screws. I'm still looking into maybe using 2 ball nuts together on one screw to reduce backlash.