Re: Rong-Fu RF-45

Peter,
I would appreciate it very much if you could do a drawing in
whichever format is easiest for you. My ballscrews have a diameter of
15mm at the bearing journal area, with an overall diameter of 22mm.
I looked at both Nook and THK but never found what you described,
except photos of commercial end blocks. I did find the bearing
locknuts at McMaster-Carr. They have an AFBMA threaded collar and say
it is also called a bearing locknut, I believe from the catalog
decription it is what you are referring to.
Sometimes when you are a beginner it's hard to know enough to even
ask the right questions and know where to look for info.
If you want to put a drawing in the files folder here at
CAD_CAM_EDO_DRO maybe someone else would benefit as well as me.
Thanks

> Terry,
>
> I have not looked at the NSK website as I have a copy of the

catalog in

> question. I don't have the part number of the screw handy, just

tell me what

> the bearing journal diameter is. I can draw up a .dwg file for you

if you

> like. I could fax you a copy also but I will not scan and post it.

I could

> also post my drawing in a jpg or such if required.
>
> Since these blocks have very similar dimensions brand to brand,

you may

> want to check the THK or Nook sites. I know Nook has drawings of

ball screw

> thrust bearing blocks on line. If you are going to carve a new side

plate,

> I'd integrate enough meat into it so I could mount the axis motor.

If at all

> possible, also include provisions for a protective shield over the

cog belt

> or flex coupling (whatever you decide) to prevent problems with

debris build

> up. I will design mine in a few weeks but wonder if Roland of

Cardinal

> Engineering has not designed his yet. He is usually very good about

debris

> control.
>
> The bearing lock nut is a standard part available at any

bearing supply

> house. The bearings are angular contact ball bearings, you should

specify to

> the bearing supplier that you want matched pairs. The opposite end

of the

> ball screw would require a "simple" mount that has only a single

floating

> ball bearing.
>
> If you are gonna cut abrasive materials on your mill, I'd also

make

> provisions for shaft seals. At the very least, a zerk fitting to

allow

> relubing often. If you are cutting aluminum and such, you might

relax the

> sealing effort.......
>
> Peter
> THRD, Inc.