i want to try and make some reamers at home... all i have is a small hobby lathe... i want to start making straight edged reamers first for be able to bore out precise holes for die bodies, them eventually move on the ogive reamers... i have searched the archives but i still have few questions...

i will be making D shaped reamers from drill rod:

-what is the best material to use at home, W1, O1?

-do i simply turn the rod the correct diameter, and then use a bench grinder to make the D shape?

-not sure what the "rake" is, and how long should the cutting surface be?

-can i use a torch to harden the reamer when i am finished?

-is the cutting edge honed after hardening?

i know this is basic information for many of you, but these details are escaping me right now and any advice/help/experience you can share will be much appreciated...