Strike CNC (My first CNC router)

[Jonathan]

Agree with what m_c said. You can find the formula he suggested by searching for screw critical speed on google, but assuming the ballscrew is 350mm long the critical speed is 3500rpm - so 3500*5=17.5m/min. The formula isn't that accurate, but that's a huge amount more than you'll ever get on the Z-axis so you're fine to run it. It's <£2 for the bearing you need on eBay, so it's not much loss to get a new one, not that you should have to pay for it anyway.

This thread is the first result on Google for 'Strike CNC', so I wonder how long it will be until they re-brand!

I doubt they will go out of business soon, as it's so easy for these companies to blatantly lie about their products:

http://strikecncrouters.com/page2.htm