Thread: Centec 2 ballscrews
im currently still at the planning stage for converting my centec 2 to cnc
one major issue with converting this machine is the sheer lack of space under the table and to even squeeze a flange 1204 ballnut through requires major metal removal to both the table and ballnut
since im not particularly happy about the amount of butchery necessary does anyone have any ideas on where to find smaller ballnuts for 8mm or 10mm screws that arn't twice the price of a 1605
failing that, any other ideas?
Last edited by irving2008; 09-10-2012 at 11:11 AM.
1605 ballscrew is the most produced ballscrew so are the cheapest. Miniatures are harder to make and made in far less volume so expect to pay a lot more.Visit Us: www.zappautomation.com
cheers for the reply gary, i was looking at your Gten FSDD ballnuts but the links to the datasheets were only bringing me to the zapp home page
i recon its just a tough choice of whether to butcher components to fit cheaper ballscrews or to just splash out on the more expensive miniatures
i thought i would post some solidworks screen prints to better describe my predicament (i know you guys love a little bit of imagery )
the first two is the standard table and the third shows how much material would need to be removed just to fit a chopped up 1204 nut in
here we have a 1204 nut before and after 'modification'
just to show you the clearances involved
100 points to the first person who finds 3 issues with the screenprints!
The Following User Says Thank You to Gary For This Useful Post:
thank you gary, that link is certainly very helpful
i want to get a bit more feedback on the subject first before i start ordering parts but i do think that zapp is the only reasonable choice for the smaller ballnuts IMO
if anyone wants to share their thoughts or opinions, please do so or forever hold your peace
how long a ballscrew do you need?
The ballnuts from China are made from a fairly hard grade of steel. However I did check a RM1204 ballnut from Chai and I could file it, so you should be able to machine them.
There are some suppliers on AliExpress with small ballscrews - it might be worth asking if they have what you need although it's a bit of a long shot.
Could you not mount the ballscrew somewhere else, for instance to the front of the table perhaps using the convenient T-slot? It's clearly not as nice as having it under the table, since the force will be off centre and you'll need to protect it from swarf, but I don't think either of these are a big deal compared to what might happen if you mill that much out of the table. It wouldn't require modification to the machine in addition to being a lot cheaper.
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