Reamer for valve guides

[Torbo]

I got a new tread tap to day, an tried ut the reamer. It worked well, but the cutting steel from a broken tap was to weak. I get four cuts ready, but I had to grind the tool tee times, so I stopped. I have to find a hss tool that fit in the 5,5 mm hole or make a square hole and put some Square tool in. My be with a bigger hole? May be I can harden the steel? Since it is from the other end of the treating bit? I suppose it i not hardened there?I could may be use a 6 mm square lathe bit HSS.?

 

[Torbo]

Well I tried to harden the reamer tap but it docent work. I must go on HSS-steel. I have order some.
I have tre guides again, but Im not in hurry with this sylinderhead. I will only make it ready for some members in the Volvo PV-klub. Mine is good. I took my guides in my lathe, but it is risky an more job.
To day I have to make a wood floor in second floor? (1. floor over ground floor?) in my garage. In Norway we say 2. floor.