My homemade CNC-Router build

[fastflyer20]

Looks like a very good design.

What type of spindle bearings are you planning to use?

[Azalin]

Thanks Tom.

I want to use open type ball bearings and fill the housing with high speed oil but for this I need to find a way to seal the bottom side.

[fastflyer20]

I would suggest angular contact bearings, this is the style CNC machines use for spindles. It is a special ball bearing that can handle higher axial loads. The ID spacer between the bearings determined the pre-load. You can stack the bearings together even in different orientations for more support.

They can be packed in grease and you can design in a seal below them to keep the grease in.

Due to the assemble procedure of regular ball bearings. there is always some axial and radial play in them which can affect your cut. Properly designed, the angular contact spindle with have minimal play.

http://www.skf.com/group/products/be...ngs/index.html

[Azalin]

That's amazing. I didn't know that type of bearings. The one I need is NSK7904CTY.

Bad that they are expensive.

[fastflyer20]

You may be able to find cheap knock offs, they would still be much better than a standard ball bearing. I will email you a sketch.

[Dylwad]

http://www.vxb.com/page/bearings/CTGY/ANGULAR_CONTACT

[Azalin]

Here is my new Z assy.

[fastflyer20]

Keeps getting better and better!

[Azalin]

Thanks Tom.

And this is the brushless spindle project.

I need a bigger lathe.

[Azalin]

The bottom cap is ready too. Those yellow bolts are for test fitting only. I'll replace them with M4x10 hex bolts.

[Azalin]

Done.

[Azalin]

Made a steady rest for my Proxxon PD230 lathe.

[Azalin]

OK, here's the first version of my brushless spindle. I haven't did anything for the balance but it seems like it is very well balanced. No vibrations at all and lots of power. I got some angular contact bearings on the way for the second version.

I have used regular ball bearings on this one and they get hot very quick so This is why I'll build a new one with proper bearings.

[fusionsx00]

awesome project

reminds me of a haas cnc router i used before, A GR-510

im working on a smaller size 3 axis cnc 400mmx400mm and 300mm in z
nothing started just plans and drawings

[Azalin]

Ok this is the first cut with my homemade spindle.

15k RPM (max 24k)
Feed 500
Step down .5mm
6061 aluminum
2mm 2 flute end mill



Sent from my GT-I9300 using Tapatalk 2

[gta18]

That is nice!

What did u not like about the z-axis you bought? Nice cut!

I was thinking of getting one of those on eBay too.

Was it hard align the linear rails? I'm thinking of using the plastic vbearings on the 2040 aluminum channels.
And belt driven instead of the antibacklash leads.

What do you think?

[jogeiremil]

Looks very good [emoji106]

[dnj1985]

looks bad a**