Hi guys,
I am going to build a paper punch because I want to punch 44 ea. 1/8" dia. holes for 10 only calendars (about 13 pages each). My question is -- will mild steel be sufficient for the punches or should I use O1 heat treated steel? Also, should the business end of the punches be concave, flat or? Any other suggestions would be welcome.
Thank you for taking the time to read this.
Colin