Ed Kennell 47,517 #1 Posted 4 hours ago Much quicker than my vee blocks, dial indicator, and BFH. https://www.facebook.com/reel/1751731073081812 1 Share this post Link to post Share on other sites
ri702bill 13,147 #2 Posted 4 hours ago (edited) I worked for a local Company back in the mid 1980's that manufactured Build-to-order Deep Hole Gundrilling Machines. I spent several weeks in Kokomo Indiana nstalling & training folks how to use & maintain their new transmission shaft Gundrills. Our Machines drilled a 5MM oil hole about 75 MM deep. These machines were part of dedicated Workcells - barstock was fed in one end, finished machined parts out the other. They had an Italian Machine there that did the same straightening thing - rotate the part to locate the highest runout spot, calculate the force & apply it where needed, repeat twice more. If the part was not straight within spec after the third try, it was scrapped. Quick & efficient. The step before the Gundrill was to rollform the splines onto the shaft - one pass revolving the shaft 2 or 3 times under 100 tons of pressure. That process generated NO chips as the metal was upset into shape... Edited 4 hours ago by ri702bill 2 Share this post Link to post Share on other sites
953 nut 69,696 #3 Posted 2 hours ago Ed, you know that a BFH tool will get the job done in half the time. Might not be as accurate but a whole lot more fun! Share this post Link to post Share on other sites
ri702bill 13,147 #4 Posted 26 minutes ago 1 hour ago, 953 nut said: Might not be as accurate but a whole lot more fun! Until you overdo it and get the bend going on the opposite side. I have had decent success using Vee blocks like Ed did, but also using the old "Eyecrometer" and the 20 hydraulic press. Fina; reading done with the Dial indicator on the Magnetic Base. Gauging the "spring back" is always a challenge... Share this post Link to post Share on other sites
