Originally Posted by
Algirdas
It is reasonable, sure. I would do thorough calculations before.
If you want nice surface of mold ( = nice surface of final product ) you need very good machinetool and control system. Because every single even shortest stop of tool is visible on the final surface. Machining accuracy 3 microns is a disaster for comercial mold. You need to decide if You need such acuracy or not. Because from te practical point of view even 10 microns acuraccy is enough in most cases like yours.
Next point. The second-hand machine. Hire good independent expert to inspect before purchase. If the machine was not leveled regularly, if maintenance was poor, you can get just a package of headache.
And the most important again. Service quality in your area. Some people work with best brands and crying when it comes to service. Check the workshop nearby to see what branch they use and feedback regarding maintenance provided by authorised dealer.