Hello, I bought a used vortech router craftmaster 6x12 table. after replacing 2 power supplies and motor drive,finally started to cut parts but pieces came out with chatter marks so I replaced the bearings in the z axis, when replacing the ball screw the bearings started falling out,so I called vortech and he said he could take one out of a machine for 690.00. Other companies wanted 800.00 to repair the old ball screw. I checked out ebay and wrote a chinese company, they told me the new ball screw with nut would cost 120.00 with shipping. Sounds like a great deal but is it you get what you pay for? I have an 80 watt rabbit laser and have had no problems. If anyone has had any experience with a chinese ball screw would like your opinion.
Thanks