Power tool vs machine tool

[Koi]

Ive seen people using die grinder like a scraper but for hardened ways or high carbon steel .

 

[Buffalo21]

I did a job in a palm oil plant in Kuantan Malaysia, I left he facility at about 5 pm, because we needed a 4” x 6” NPT pipe nipple, that had to be flown in from KL, and would be there mid afternoon the next day. At 7 am the next morning, I arrived to find a 4” x 6” nipple, that 2 of the workers had laid out and hand cut the threads with triangular files. I have no idea how long it took them, or how many try’s it took, but it screw into the fittings and was installed, and when I left the facility 2 months later, it was still in the piping. Amazing things can be done with hand tools, that people of my ilk would never attempt on my own.

 

[Downunder Bob]

The first threads in history must have been cut by hand.