Posted by mattofvinings on July 24, 2009 at 20:15:27 from (198.208.159.20):
In Reply to: 806 front end threads posted by Mazemeister on July 23, 2009 at 17:45:12:
Really....by the time you get done drilling oversize and tapping for a helicoil, you could probably just go up to the next coarse thread size.
IMHO there are two options that stand out in my mind amongst "a thousand ways to skin a cat".
1. Examine the bolster casting to see if you could drill and tap existing threads deeper, approx 1 diameter's worth of new threads should be sufficient. Two diameters' worth of new threads would be excellent.
2. Drill and tap oversize as above. Best to study the thread charts to make sure the next pilot drill will "cleanup" the major diameter of the existing threads.
To do either job with quality and reliability I would want the bolster casting out of the tractor and setup on a milling machine or radial drill press.
This post was edited by mattofvinings at 20:19:57 07/24/09.
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