My company is developing a new handheld power tool. We are a rather inexperienced team and I am not a electrical engineer but I am concerned about the safety of our customers. We are located in Germany and while I am sure there are regulatory requirements, I feel like these are voluntarily (CE for example.) It seems like our device will be released without further safety tests and I am concerned. I am sorry about the non-technical nature of the question so far.
I made a sketch of our device:
The PCB pretty much converts 230 VAC to 230 VDC and drives a 230 VDC motor with a switch.
While most of the device is within a plastic case, there is a piece of metal sticking out of the front. The motor and the piece of metal at the front are pretty much connected to each other - I can measure only ~ 0.5 ohms between them. Our electrical engineer said there is no need for a protective earth because our competitors (3 rather large companies) don't have it either. Intuitively I would disagree since if there is a fault at the motor it would conduct the 230 VDC to the front piece of metal and touching that would be unfortunate.
Maybe I am just paranoid and not qualified so I hope someone can help me out here.