Protolabs Q&A: CNC Big Block

Your masterclass in product design and development


Protolabs’ Insight podcast series

Our Insight podcast series is aimed to help you design better parts for digital manufacturing.

We will regularly share with you podcasts packed with useful tips that will hopefully save you some time and money, from Q&A sessions to design tips.


In this episode we answer your questions on CNC big block with David Ewing, EMEA Product Manager - CNC Machining at Protolabs. See below for a list of questions answered in this session:

  • What is meant when you refer to the term "Big Block"?
  • What materials are open to Big Block?
  • What kind of tolerances can be achieved with the Big Block capabilities?
  • What is the minimum quantity I can have if I choose CNC?
  • What kind of materials are used in CNC & what should I consider when selecting for my machined parts?
  • I'm looking to have a logo put on to my part, is this worth doing?
  • What is the minimum wall thickness on a machined part?
  • On the topic of undercuts, what kind of clearance would you recommend?


Get involved in future sessions by sending in your questions to [email protected] or use #ProtolabsQA.