Recent content by nz120

thanks for the encouragement....I am enjoying getting back into it....Covid-19 has given me more time..if only someone would pay me to partake in my hobbies haha

using the rotary table for milling of the valve guide, and the clearance slots for access to the main journal cap screws.

Baron I set up the rotary table to allow me to rotate to a 45 degree angle for the valve slide recess to be milled. I squared up the casting using a dial gauge along the flat of milled face of the valve guides on the casting and then rotated. When I do the second kit I am thinking to mill...

I do appreciate all your comments, and pleased that my initial problem has raised a number of helpful suggestions. Given that the PMR #5 is my first attempt at parallel bearings, and that I doubt if my overall precision is perfect anyway I intend to drill and ream and see how I go. I actually...

Mike, great tip...will try that....I take it that you just sharpen the actual Allen wrench to a cutting edge....

Thank you for the confirmation....have ordered the 19/64 drill and 5/16 reamer and will await the courier :-)

Thanks for that post....that makes sense. Not sure that my skills are up to making a boring bar small enough for a 5/16" bore, but I'll retain that information for when I need something bigger.

Thank you for the prompt response. So do you mean that you used a REAMER, rather than a boring bit? I see that there are 5/16" reamers available.....do you suggest drilling a pilot hole right through both journals then reaming through from one side through both journals?

Hi After 15 years break with kids I have pulled out an old half-built PM Research #5 kit and have been making good progress. I'm now at the point of needing to bore the main journals for the crankshaft. I can't work out how to bore a .313 hole on each bearing AND make sure that they are in...